EI Core UI Core Transformer 50hz 60hz transformer EI Core Linear Transformer Low Frequency Transformer Low-Frequency Transformer EI Core Power Transformer UI Core Power Transformer
EI Core UI Core Transformer 50hz 60hz transformer EI Core Linear Transformer Low Frequency Transformer Low-Frequency Transformer EI Core Power Transformer UI Core Power Transformer

EI Core Transformer

  • Model: Customize
  • Specification: EI28, EI35, EI41, EI48, EI54, EI57, EI60, EI66, EI76, EI86, EI96, EI133, UI29, UI38, UI43, UI48

Main Power provides EI Core Power Transofrmer.

EI Core Type Power Transformer, linear transformer is a traditional transformer with simple and reliable structure.  which working frequency berween 50Hz & 60Hz. And widely Power: from 5VA to 1200VA. It could be extend to Encapsulated Potting Isolation Power Transofrmer and Toroidal Transformer. 


  • Being protected by temperature switch or fuse wire
  • Reasonable cost
  • Easy to install and integrate into system
  • Easy to modify to achieve custom requirement

Main Power Electric Co., Ltd. has built EI Core Transformers for more than 30 years under an ISO 9001 quality system that tests 100 percent of samples, trial runs, and production units. We manufacture and ship these transformers worldwide from our facility in Taoyuan City, Taiwan. Each unit covers a power range of 5VA to 1200VA at 50Hz or 60Hz, with protection built in through a temperature switch or fuse wire, and our engineers can extend the design to an Encapsulated Potting Isolation Power Transformer or a Toroidal Transformer on request.


Main Power Electric's EI Core Transformers cover a working frequency of 50Hz to 60Hz and a power range from 5VA to 1200VA, with built-in protection through a temperature switch or fuse wire.

  • EI Series core sizes: EI-28, 35, 41, 48, 54, 57, 60, 66, 76, 86, 96, 105, 114, 133, 152, 162, 171, 179.
  • UI Series core sizes: UI-29, 38, 43, 48.
  • The design can extend to an Encapsulated Potting Isolation Power Transformer or a Toroidal Transformer.

AC / AC and AC / DC Power Supply, Audio / Video Amplifier, Electronic Equipment, Security System, Test Instrument, Industrial Machine, Precision Refrigeration, Household Equipment, Automatic Control, UPS, Energy Storage, Inverter, Automatic Door, Elevator Control, Medical Equipment, Meter Switching Mode Power Supplies, Server, Solar Energy Converter, Electric Car, Lighting, etc.


Q: What power capacities and operating frequencies do these custom EI Core Transformers support?

A: Main Power Electric supplies EI Core Transformers built for 50Hz or 60Hz operation, across a power range of 5VA to 1200VA. Each unit protects the circuit with a temperature switch or fuse wire for stable energy conversion.

Q: Which end-use applications and customized core options are supported by the EI Core Transformer series?

A: Main Power Electric supplies these transformers for AC/AC and AC/DC power supplies, audio/video amplifiers, security systems, test instruments, industrial machines, precision refrigeration, and UPS systems. We offer EI-28 through EI-179 and UI-29 through UI-48 core sizes, and our engineers can extend the design to an Encapsulated Potting Isolation Power Transformer or a Toroidal Transformer for extra environmental protection.

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