Product Overview

Defon Electronics manufactures encapsulated EI transformers designed with a fully sealed epoxy-resin construction to ensure maximum protection and long-term reliability in harsh operating environments.

By encapsulating the transformer core and windings in high-grade epoxy material, these transformers achieve excellent resistance to moisture, dust, vibration, and mechanical stress, making them ideal for demanding industrial and outdoor applications.

Our encapsulated transformers are available in a wide VA range and can be fully customized to meet specific electrical, mechanical, and safety requirements for global OEM customers.

Key Features

  • Fully epoxy-encapsulated sealed structure
  • Excellent moisture, dust, and corrosion resistance
  • High vibration and mechanical shock resistance
  • Improved electrical insulation and safety performance
  • Stable operation in harsh environments
  • EI laminated core inside sealed housing
  • Wide VA range available
  • OEM / ODM customization supported
  • Long service life and high reliability
  • Suitable for indoor and outdoor installations

Applications

Encapsulated transformers are widely used in:

Industrial Equipment

  • Automation control systems
  • Factory machinery
  • Power distribution systems
  • Harsh environment control panels

Outdoor Lighting

  • Landscape lighting systems
  • Street lighting
  • Architectural outdoor lighting
  • Garden lighting

HVAC & Building Systems

  • HVAC control units
  • Building automation systems
  • Pump control systems
  • Elevator systems

Marine & Special Environments

  • Marine electrical systems
  • Offshore equipment
  • High humidity environments
  • Corrosive industrial areas

Security & Commercial Systems

  • CCTV systems
  • Access control systems
  • Communication equipment
  • Outdoor security devices

Electrical Performance

  • High dielectric strength insulation system
  • Stable voltage output under continuous load
  • Excellent resistance to moisture and environmental stress
  • Low risk of short circuit and electrical failure
  • High vibration resistance for industrial use
  • Reliable long-term operation in harsh conditions

Customization Options

We support full OEM/ODM customization:

  • Input voltage: 110V / 220V / 230V / 240V / 277V
  • Output voltage: single or multiple outputs
  • Power rating: custom VA range (low to industrial grade)
  • Frequency: 50Hz / 60Hz
  • Insulation class: B / F / H
  • Encapsulation level: partial or full epoxy potting
  • Mounting type: PCB / chassis / screw mount
  • Terminal / lead wire configuration
  • Safety certifications: UL / CE / ETL options
  • OEM branding / private label support

Why Defon Electronics

Defon Electronics is a professional manufacturer of epoxy encapsulated EI transformers, providing reliable power solutions for demanding environments worldwide.

  • Strong OEM/ODM engineering capability
  • Stable and consistent mass production quality
  • Expertise in encapsulation technology
  • Fast prototype development support
  • Competitive factory pricing
  • Export experience for global industrial markets

We support both custom prototypes and large-scale OEM production.