How to choose this product

A transformer is an electrical component designed to convert voltage and alternating amperage values into higher or lower voltage and alternating amperage values.


Transformer applications are numerous. They are found in power distribution networks, AC/DC converters and device power supplies, as well as in electronic circuits, where they transform signals or isolate circuit parts.


A transformer is composed of primary and secondary windings with different numbers of turns, each constituting a solenoid. These coils are magnetically coupled by the transformer's shell, or iron core.

How to choose

The desired transformation ratio determines the choice of model. The transferred energy quantities between the primary and secondary coils figure in choice of transformer size. The nature of the primary current (single-phase, three-phase) also helps in determining the appropriate transformer.


- Excellent efficiency


- Heavy
- Bulky
- Generates heat

358 companies | 1957 industrial products

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1 products WAGO
WAGO 50 - 1 000 A, 230 - 690 V | 855 series
Current instrument 50 - 1 000 A, 230 - 690 V | 855 series WAGO

It is only once you know your power consumption that measures can be initiated to improve consumption and sustainably reduce energy costs. For this, WAGO provides the right products ranging from current...

1 products Weidmüller
Weidmüller 36 - 1 000 W
Electrical power supply 36 - 1 000 W Weidmüller

In cases where the process or control voltage does not match the main voltage, it is necessary to use a power pack...

ROCKWELL AUTOMATION 600 V | 1411 series
Current 600 V | 1411 series ROCKWELL AUTOMATION

The Bulletin 1411 Current Transformers are transformers for low voltage requirements (600V AC)....


There are a lot of brands out there. But there are very few who can brag about quality. One of them is Rockwell Automation. The Rockwell Automation Transformers are...

2 products DWYER
Current instrument DWYER

Series CT40/50 Current Transformer - 4-20 mA or 0-5 VDC Output, Split Core Case Series CT60/70...

DWYER CE, RoHS, CA/US UL Listed | SCT Series
Current CE, RoHS, CA/US UL Listed | SCT Series DWYER

Made by Dwyer, these Series SCT Current Transformers have a split core and relay output. The former mechanism facilitates an easy installation of this transformer on new or preexisting...

1 products Allen Bradley
Allen Bradley 1497 series
AC/DC power supply 1497 series Allen Bradley

Our Global Control Circuit Transformers are designed to reduce supply voltages to control circuits, providing greater safety...

1 products Vulcanic
Lowvoltage instrument Vulcanic

Non-flammable moulded plastic case current transformer for the measurement of AC currents from 50 to 1000A. This...

Jacob - Kabelverschaubungen
Lowvoltage instrument Jacob - Kabelverschaubungen

The measuring transformer 270.420.00 has been designed for a constant and filtered operating voltage of 24 V...

1 products Seneca
Seneca 230 / 19 V AC | Z-POWER
For DINrail mounting 230 / 19 V AC | Z-POWER Seneca

Order code : Z-POWER Description: DIN rail 19 Vac transformers Versions 230-15 VA, 230-25...

Vostermans Ventilation 3.15 - 6.3 A | SEA Series
Control 3.15 - 6.3 A | SEA Series Vostermans Ventilation

The SEA 3.15 (maximum output current 3.15 Amps)...

Vostermans Ventilation STW series
Controller for step STW series Vostermans Ventilation

The STW series step transformers enable fan motor speed...

Vostermans Ventilation STD series
Controller for step STD series Vostermans Ventilation

The STD series are intended for three-phase...

Vostermans Ventilation max. 10 V | Relink-2s
Controller for step max. 10 V | Relink-2s Vostermans Ventilation

The Relink-2s enables the drive of a step transformer through a 0-10V signal. It is especially...

Vostermans Ventilation max. 10 V | Relink-2c
Controller for step max. 10 V | Relink-2c Vostermans Ventilation

The Relink-2c enables ventilation control by sequentially switching fans on...

Pasternack Enterprises, Inc. 50 - 75  Ω
Impedance 50 - 75 Ω Pasternack Enterprises, Inc.

Pasternack matching pads (aka resistive impedance transformers or minimum loss pads) are passive coaxial components that allow impedance matching between 50 Ohm and 75 Ohm systems without introducing...

2 products SOCOMEC
SOCOMEC 5 - 5 000 A
Current 5 - 5 000 A SOCOMEC

SOCOMEC current transformers deliver to the secondary a standard current proportional to the primary current and adapted to the rating of the associated device. They...

Toroidal for earthleakage differential protection relays 800 V SOCOMEC

The installation of protection or signalling resources such as earth leakage protection relays involves the use of core balance transformers. Active conductors...

Marsh Bellofram CT series
Current CT series Marsh Bellofram

The CT Current Transformers are of the inserted primary type with the secondary toroidally wound over a core of oriented electrical steel. The windings are carefully insulated. The entire transformer...


Expand input range use with the...

3 products Littelfuse
Littelfuse 200 A | PGC-2000 series
Current 200 A | PGC-2000 series Littelfuse

Detects phase current or groundfault current(200 A primary) The PGC Series Current Transformers (CTs) are key components...

Littelfuse 5 A | PGC-3000 series
Ground fault current 5 A | PGC-3000 series Littelfuse

Sensitive current transformer used to detect ground-fault current (5 A primary) The PGC Series Current Transformers (CTs) are...

Littelfuse 30 A | PGC-5000 series
Protection current 30 A | PGC-5000 series Littelfuse

Current Transformer for low level ground-fault situations, flux conditioner is standard. (30 A primary) The PGC Series Current Transformers...

Contrel elettronica TT / TTA
Compact current TT / TTA Contrel elettronica

CURRENT SENSORS SERIES TT AND TTA The range of instruments of the series EMM and EMC, for the measurement of all electrical parameters, has been implemented...

Contrel elettronica TCA
Split core current TCA Contrel elettronica

Split core current transformers - TCA serie - Small size and easy mounting. - Range output burden: 100A...

Contrel elettronica TCB-A
Split core current TCB-A Contrel elettronica

The current transformers are open for use within distribution boards or power center in the...

Contrel elettronica TCC / TCCN
Current TCC / TCCN Contrel elettronica

- Fixing system: to wall or to DIN rail by an accessory; directly to cable by screws. MEASURING TRANSFORMERS - The double terminal entry allows short circuit links to be fitted when it is necessary...

Contrel elettronica TCM
Current TCM Contrel elettronica

- Fixing system: to wall or to DIN rail by an accessory ; directly to cable by screws (the accessory and the screws are supplied together with the C.T.) MEASURING TRANSFORMERS The double terminal...

Contrel elettronica TCB
Current TCB Contrel elettronica

- Sealable terminals cover included - Different characteristics on request - Fixing system: to wall, to cable/passing bar or to DIN rail by accessories supplied with the CT (depending by the...

SELEC Controls Pvt. Ltd. SPCT series
Current SPCT series SELEC Controls Pvt. Ltd.

Rated primary rating : 75A to 1200A Rated secondary output : 5A Rated burden : 1.5AV – 15VA Class of accuracy...

Mars-Energo LLC max.  0.66 kV | PCTI series
Current max. 0.66 kV | PCTI series Mars-Energo LLC

PCTI series includes Class 0.05 instrument current transformers (CT). These portable devices...

Mars-Energo LLC 5 kA
Current tester 5 kA Mars-Energo LLC

Test Set includes: IT5000 Adjustable Current Source; PCTI...

Mars-Energo LLC 30 kA
Current tester 30 kA Mars-Energo LLC

On-site testing of generator bus-type current transformers rated at 10...50kA according to the commonly applied test procedure (e.g. as prescribed by Russian standard GOST 8.217-2003) hardly appears to...

Mars-Energo LLC 330 kV | HSCS-1
Tester 330 kV | HSCS-1 Mars-Energo LLC

Purpose The set is meant for on-site check of single-phase instrument-class voltage transformers (VTs) of 0.2 accuracy class (or less accurate) and 50-Hz frequency rated at 6 to 330/3kV under a load (applied...

Mars-Energo LLC 10 kV | HTCS-3-10
Tester 10 kV | HTCS-3-10 Mars-Energo LLC

High-Voltage Three-Phase Test Set for Voltage Transformers rated at 10kV Purpose: The set is meant for initial or regular on-site check of single- or three-phase instrument-class voltage transformers...

Mars-Energo LLC CT VCC
Current tester CT VCC Mars-Energo LLC

Purpose: The Converter is meant for testing of instrument-class current transformers (ICT) following the method of experiments and calculations (3123-2008) developed by VNIIM in cooperation with NIIVA....

Tele Haase Steuergeräte max. 40 A | WSW 60
Current DIN railmounted max. 40 A | WSW 60 Tele Haase Steuergeräte

Baffle types up to 40A For currents up to 40 A, baffle-type current transformers with terminal-...

Tele Haase Steuergeräte max. 50 - 1 500 A | DSW series
Current DIN railmounted max. 50 - 1 500 A | DSW series Tele Haase Steuergeräte

Bar types from 50 up to 1500A For sensing high currents up to 1500A bar-type current transformers are...

Tele Haase Steuergeräte RNG/DRNG
AC/DC power supply RNG/DRNG Tele Haase Steuergeräte

Power supplies for DC voltage Units in well approved technology supply DC-voltage...

1 products ETI
ETI 50 V | TRANSF series
Singlephase 50 V | TRANSF series ETI

Single phase safety and insulating transformers Safety transformer: It is an insulating transformer designed to supply circuit at a maximum of 50V (safety extralow voltage). Insulating transformer: It...

1 products Victron Energy
Victron Energy
Isolation Victron Energy

Isolation Transformers 2000VA / 3600VA / 7000VA and Auto Transformers Indispensable in professional...

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industrial transformers

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