Why Choose Epoxy Potted Encapsulated Transformer For Industrial PCB Projects

 Why Choose Epoxy Potted Encapsulated Transformer For Industrial PCB Projects

When designing reliable power circuits for industrial, medical and cabinet‑mount devices, component stability against moisture, dust and vibration becomes critical. An encapsulated transformer, also known as epoxy potted transformer, solves many environmental challenges compared with open‑frame transformers.
A custom encapsulated transformer is fully filled with epoxy resin. The potting compound wraps the EI core, windings and pins completely. This structure locks internal components firmly, avoids winding displacement under shock or continuous vibration.



The epoxy potted PCB‑mount EI power transformer is one of the most popular models. Designed for direct PCB mounting via pin terminals, it saves cabinet space for compact equipment. It belongs to encapsulated low frequency transformer, mainly used for AC‑AC power isolation and voltage conversion instead of high‑frequency SMPS tasks.

Core benefits of encapsulated transformers

  • Moisture & dust resistance: Epoxy potting prevents humidity, dust and chemical mist from eroding copper windings, suitable for harsh workshop environments.
  • Excellent vibration resistance: No loose coils during equipment transportation or long‑time running.
  • Improved noise suppression: Resin damps core hum, bringing quieter operation for audio and precision instruments.
  • Isolation safety: Reinforced insulation between primary and secondary windings meets general industrial isolation requirements.

Common application scenarios

Industrial control boards, medical auxiliary power supply, household appliance control modules, test instruments, cabinet low‑voltage power units.
Not all projects need potted solutions. If your device works in clean indoor cabinets without vibration risk, non‑potted open‑frame EI transformers can cut your material cost. When equipment faces damp, dusty or shock‑prone conditions, select epoxy potted PCB‑mount EI power transformer.
If you require special voltage ratio, pin layout or power rating, you can source custom encapsulated transformer to match your PCB footprint and power demand.

You may also want to compare different installation styles for power transformers. Read our guide: Chassis Mount Transformer vs PCB Mount Transformer: How To Choose, to evaluate chassis‑mount and PCB‑mount solutions for your cabinet and circuit‑board projects.

Specification

ItemCore TypeOutput Power(w)ItemCore TypeOutput Power(w)
EI28EI28/8*120.5‑1EI57EI57/19*3016‑32
EI28EI28/8*160.7‑1EI57EI57/19*3820‑40
EI35EI35/9.6*100.2‑0.8EI66EI66/22*2217‑35
EI35EI35/9.6*12.50.25‑1EI66EI66/22*2824‑45
EI35EI35/9.6*160.4‑1.7EI66EI66/22*3536‑58
EI35EI35/9.6*200.6‑2.5EI66EI66/22*4555‑77
EI41EI41/13*130.6‑2.3EI76EI76.2/25.4*2565‑88
EI41EI41/13*161‑3.6EI76EI76.2/25.4*31.571‑95
EI41EI41/13*211.6‑5.5EI76EI76.2/25.4*4070‑97
EI41EI41/13*262.3‑7.7EI76EI76.2/25.4*5086‑123
EI48EI48/16*162‑5EI85.8EI85.8/28.6*2970‑95
EI48EI48/16*202.8‑7.2EI85.8EI85.8/28.6*3684‑120
EI48EI48/16*254.6‑11.1EI85.8EI85.8/28.6*46105‑154
EI48EI48/16*327‑10EI85.8EI85.8/28.6*58130‑200
EI54EI54/18*185‑12EI96EI96/32*40100‑150
EI54EI54/18*22.58‑17EI96EI96/32*45110‑160
EI54EI54/18*2911‑25EI105EI105/35500‑700
EI54EI54/18*3617‑34EI114EI114/38700‑1000
EI57EI57/19*197‑16EI57EI57/19*2414‑21

此博客中的热门博文

Three Phase Transformer for Industrial Power Distribution | Custom KVA Ratings

图片
  Three phase transformer is essential power conversion equipment for industrial automation, power cabinets and high-power machinery. Different from single-phase low-frequency and high-frequency transformers, three-phase designs realize balanced voltage transmission for multi-phase power supply systems. Item Specification Product name Three phase isolation transformer Rated Power 5KVA,10KVA,50KVA,100KVA,150KVA,200KVA (Custom power available) Input voltage 660V, 480V, 440V, 380V, 220V (All voltages can be customized) Output voltage 1140V, 690V, 660V, 480V, 460V, 440V, 415V, 400V, 380V, 220V, 200V, 208V, 127V, 110V, 48V, 36V, 24V, 12V (All voltages can be customized) Voltage accuracy ±1.5% Waveform distortion No distortion Insulation class Class F / Class H (Optional) Temperature rise ≤60℃ Dielectric strength 2000VAC / 60S Insulation resistance ≥2MΩ Compliance Standards IEC 61558, EN 61558, VDE 0550, IEC 60076 We supply customized three phase transformer with silicon steel core. Var...
阅读全文

What Is Custom Flyback Transformer & Its Applications in SMPS

图片
  A flyback transformer acts as a coupled inductor used in isolated SMPS circuit topologies. It stores and transfers energy during switching cycles, differing structurally from ordinary high frequency power transformers. Many circuit engineers prefer custom-designed flyback transformers for SMPS power circuits to meet non-standard design requirements instead of selecting universal stock components. Ready-made magnetic components frequently fail to meet special demands including winding ratio, stray inductance, pin arrangement and creepage distance. We are an experienced manufacturer offering tailor-made high frequency magnetic parts. Our engineering team develops custom ferrite flyback transformers for industrial switching power supplies with EE, PQ and ETD core options for various power levels. These customized flyback magnetic components are widely deployed in multiple SMPS scenarios: • AC-DC adapters and lithium battery charging modules • Constant current LED driver power...
阅读全文