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Single Phase Primary Configuration:
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The size and cost of a transformer increases with the number of leads. A 5-lead primary requires more copper than a quad (2+2) primary. A ladder is the least economical primary configuration.
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Your choices are...
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Single
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Single phase transformers with this configuration have only one winding in the primary side and can accept only one nominal voltage.
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Dual
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Single phase transformers with this configuration have dual windings in the primary side and can accept two nominal voltages. This configuration helps to reduce fault current levels. A 2-lead voltage selector must be provided.
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Quad (2+2)
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Single phase transformers that use the quad (2+2) configuration have dual windings in the primary side where each winding has a tap so that it can accept two nominal voltages.
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5-Lead
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Single phase transformers with 5-lead voltgage selectors can accept five possible nominal voltages. The primary winding is arranged so that it can accept the 5 voltage ratings.
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Ladder
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The ladder configuration is a model used with multiple winding transformers. A ladder transformer consists of windings in a cascade and a series of inductances connected between adjacent windings.
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Other
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Other unlisted, specialized, or proprietary configuration.
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Search Logic:
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All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Three Phase Configuration:
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Three phase transformers are connected in delta or wye configurations. A wye (Y) - delta transformer has its primary winding connected in a wye and its secondary winding connected in a delta. A delta - wye (Y) transformer has its primary winding connected in a delta and its secondary winding connected in a wye.
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Your choices are...
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Delta - Delta
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Both the primary winding and the secondary winding use a delta configuration.
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Delta - Wye (Y)
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The primary winding uses a delta configuration and the secondary winding uses a wye configuration.
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Wye (Y) - Wye (Y)
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Both the primary winding and the secondary winding use a wye configuration.
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Wye (Y) - Delta
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The primary winding uses a wye configuration and the secondary winding uses a delta configuration.
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Wye (Y) - Single Phase
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The primary winding uses a wye configuration and the secondary winding uses a single phase configuration with one winding.
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Delta - Single Phase
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The primary winding uses a delta configuration and the secondary winding uses a single phase configuration with one winding.
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International
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International transformers are fully compliant with American and international standard specifications such as IEC and NEMA. International transformers can be used in the U.S or in any country that supports their voltage and frequency requirements.
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Search Logic:
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All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Primary Frequency:
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Frequency of incoming voltage signal to primaries.
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Your choices are...
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50 Hz
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The primary is rated only for 50 Hz.
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60 Hz
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The primary is rated only for 60 Hz.
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50 / 60 Hz
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The primary is rated for both 50 and 60 Hz.
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400 Hz
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The primary is rated only for 400 Hz (aerospace).
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Other
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Other unlisted frequency option.
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Search Logic:
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Products with the selected attribute will be returned as matches. Leaving or selecting "No Preference" will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Maximum Primary Voltage Rating:
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Transformers for use with several nominal voltages need more than one primary winding. Enter the maximum voltage required for the application. Matching products will list all primary voltages available in addition to the maximum specified.
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Search Logic:
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User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
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The secondary windings of the transformer provide the voltages and currents required by the user to power lamps or motors, or to supply rectifiers. The Rated Power of the transformer is the sum of the VA (Volts x Amps) for all of the secondary windings.
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Maximum Secondary Voltage Rating:
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A transformer may provide more than one secondary voltage. Enter the maximum voltage required for the application. The matching products will list all secondary voltages available in addition to the maximum specified.
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Search Logic:
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User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
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Maximum Secondary Current Rating:
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Search Logic:
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User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
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Maximum Power Rating:
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The Rated power of the transformer is the sum of the VA (volts x amps) for all of the secondary windings.
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Search Logic:
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User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
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Output Type:
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Your choices are...
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AC
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Alternating current (AC) waveform output voltage values are typically expressed as RMS values. Consult the manufacturer for waveform options.
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DC
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With direct current (DC) secondary voltage output, consult the manufacturer for the type of rectification.
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Search Logic:
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All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Transformer Construction:
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Your choices are...
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Toroidal
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Typically, copper wire is wrapped around a cylindrical core so that magnetic flux within the coil doesn't leak, coil efficiency is maintained, and the magnetic flux has little influence on other components.
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Laminated
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Laminated transformers, or E-I transformers, contain laminated-steel cores insulated with a nonconducting material such as varnish. They are formed into a core to reduce electrical losses.
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Other
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Other unlisted, specialized, or proprietary configuration including oil-filled and other heavy duty industrial power distribution type transformers.
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Search Logic:
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All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Transformer Type:
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Your choices are...
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Autotransformer
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Autotransformers have a single, continuous winding tapped on one side to provide either a step-up or step-down function.
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Control Transformer
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Control transformers are low voltage transformers that step down the line voltage to the low voltages that supply power to electronic control circuitry.
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Distribution Transformer
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Distribution transformers are pole-type transformers used to supply relatively small amounts of power to residences. They are used at the end of the electrical utility’s delivery system.
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General Purpose Transformer
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General purpose transformers are not designed for specific applications. These transformers can be used in any situation where the available voltage must be changed to accomodate the voltage required by the specific electrical circuit or connected equipment.
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Isolation Transformer
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Isolation transformers have a 1:1 turn ratio. Therefore, they do not step voltage up or down. Instead, they serve as safety devices.
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Power Transformer
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Power transformers are used primarily to couple electrical energy from a power supply line to a circuit system, or to one or more components in the system. The purpose of a power transformer is to convert AC supply voltage to one or more different AC voltages. In most cases it also provides electrical insulation between the supply voltage and the user's equipment.
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Step-Up Transformer
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The output voltage is higher than the input voltage and secondary winding has more turns of wire than the primary winding.
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Flyback Transformer
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Flyback transformers (FBT) or Line output transformers (LOPT) is a transformer that is designed to produce a very high output voltage (normally in the order of kilo volts) from a relatively low input voltage. Flyback is a topology that uses the flayback - also known as kickback - of an inductor to convert the input voltage to the transformer to a desired output voltage. This is done by first storing the input energy (in the inductor) produced by the input voltage (this is called the charging cycle), and then transferring this energy (this is called the discharge cycle) to the output.
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Step-Down Transformer
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The output voltage is lower than the input voltage and the secondary winding has fewer turns of wire than the primary winding.
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Other
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Unlisted, specialized, or proprietary configuration.
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Search Logic:
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All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Mounting Configuration:
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Your choices are...
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Chassis Mount
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These transformers are typically vertically-mounted within an open-frame insulating shroud, bracket, or flange typically manufactured of high temperature material.
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Dish / Disk Mount
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This configuration provides a common, economical way to mount transformers horizontally. Transformers are secured to a mounting surface (e.g., chassis / PC board) via a bolt passing through the center of a metal dish, disk or plate placed on top of the transformer. The bolt runs through the center of the plate, transformer, and (typically) additional rubber pads for shock / vibration control.
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Enclosure / Free Standing
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Typically, only three phase transformers (e.g., oil-filled) are housed in NEMA-rated or similar enclosures.
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H-Frame
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H-shaped metal mounting frames are specifically designed for high shock and vibration.
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PCB Mount
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Printed circuit board (PCB) transformers with PC pins or other board leads.
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Other
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Other unlisted, specialized, or proprietary configuration.
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Search Logic:
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All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Standards / Compliance
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Your choices are...
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RoHS Compliant
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Restriction of Hazardous Substances (RoHS) is a European Union (EU) directive that requires all manufacturers of electronic and electrical equipment sold in Europe to demonstrate that their products contain only minimal levels of the following hazardous substances: lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyl and polybrominated diphenyl ether. RoHS will become effective on July 1, 2006.
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CSA
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CSA marks may appear alone or with indicators. CSA marks that appear alone indicate that the product is certified for the Canadian market to applicable Canadian standards. CSA marks that appear with "C and US" or "NRTL/C" indicators denote that the product is certified for both the U.S. and Canadian markets to applicable U.S. and Canadian standards.
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IEC
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The International Electrotechnical Commission (IEC) is the authoritative worldwide body responsible for developing consensus global standards in the electrotechnical field. IEC is dedicated to the harmonization and voluntary adoption of these standards, supporting the transfer of electrotechnology, assisting certification and promoting international trade. Since 1906, IEC has served the world's electrical industry, developing international standards to promote the quality, safety, performance, reproducibility, and environmental compatibility of materials, products, and systems. It has also published standards for the electronics and telecommunications industries. The IEC's present membership of 51 countries includes most major trading nations. IEC standards are widely adopted as the basis of national or regional electrotechnical standards, and are often quoted in manufacturers' specifications and by users when calling for tenders. Over 2000 standards cover virtually every topic of electrotechnology from acoustics, to medical devices, to insulating materials, to aircraft, to nuclear instruments. The electrotechnical standards organizations of each participating country make up its membership, with ANSI representing the United States.
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UL
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UL marks denote that Underwriters Laboratories Inc. (UL) has determined that product samples met UL safety requirements. These requirements are based primarily on UL's published Standards for Safety.
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VDE
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VDE marks denote electronic components that meet VDE standards.
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WEEE Compliant
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“The Waste Electrical and Electronics Equipment Regulations (WEEE Regulations) is a European Parliament Directive with the aim of encouraging reuse, recycling and recovery of electrical and electronic equipment, and to improve the environmental impact and performance of these equipments. This directive sets the requirements and criteria for the collection, treatment, recycling and recovery of these equipments. It makes producers responsible for financing these activities, and retailers and distributors must provide means for consumers to return used or obsolete equipments without charge.
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Other
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Other certification, approval, or quality markings presented by an independent testing service or government agency that are not otherwise listed.
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Search Logic:
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All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Operating Temperature:
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This is the full required range of ambient operating temperature.
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Search Logic:
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User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria.
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Part Numbers for Power Transformers
| Part # |
Distributor |
Manufacturer |
Product Category |
Description |
| 302AX-ND |
Digi-Key |
Hammond Manufacturing
|
Transformers
|
TRANSFRMR 3 FILAMNT 300VCT 198VA |
| 182S110-ND |
Digi-Key |
Hammond Manufacturing
|
Transformers
|
TRANSFORMER TOROID 220VCT 4.5A |
| 182V24-ND |
Digi-Key |
Hammond Manufacturing
|
Transformers
|
TRANSFORMER TOROID 48VCT 20.8A |
| 161J10-ND |
Digi-Key |
Hammond Manufacturing
|
Transformers
|
TRANSFORMER 115VAC 10VCT 1A |
| 160G28-ND |
Digi-Key |
Hammond Manufacturing
|
Transformers
|
TRANSFRMR 115/230VAC 28VCT 360MA |
| 160D12-ND |
Digi-Key |
Hammond Manufacturing
|
Transformers
|
TRANSFMR 115/230VAC 12.6VCT 70MA |
| 164D28-ND |
Digi-Key |
Hammond Manufacturing
|
Transformers
|
TRANSFORMER 115VAC 28VCT .04A |
| 164F24-ND |
Digi-Key |
Hammond Manufacturing
|
Transformers
|
TRANSFORMER 115VAC 24VCT .25A |
| 162D56-ND |
Digi-Key |
Hammond Manufacturing
|
Transformers
|
TRANSFORMR 115/230VAC 56VCT .02A |
| 162D120-ND |
Digi-Key |
Hammond Manufacturing
|
Transformers
|
TRANSFRMR 115/230VAC 120VCT .01A |
More >>
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