Durable Vacuum Potted EI57 Power Transformer for Reliable Control System Unit

The EI57 Series Low-Frequency Transformer represents the pinnacle of linear power conversion technology, engineered specifically for critical applications that demand absolute stability, safety, and durability. The designation "EI57" refers to the standardized 57mm width of the silicon steel laminations, optimized for mid-range power delivery (typically 10VA to 30VA).

Unlike standard open-frame transformers vulnerable to environmental stressors, our EI57 series features a fully encapsulated (potted) design. Internal components are sealed within a high-grade, flame-retardant plastic housing and filled with specialized epoxy resin under high-vacuum environment, providing a monolithic barrier against moisture, corrosive gases, dust, and mechanical vibration.

• Total Environmental Protection: Vacuum-potted epoxy encapsulation creates a hermetic seal, making the transformer immune to high-humidity environments, salt spray, and industrial pollutants
• Superior Multi-Tap Versatility: Flexible primary winding with multiple tap points (115V, 160V, 230V) allows integration into diverse global power grids and specialized equipment
• Acoustic Silence and Vibration Damping: Rigid potting compound eliminates audible "hum" and prevents mechanical fatigue on internal copper connections
• High Dielectric Isolation Barrier: Engineered to meet stringent international safety requirements, ensuring complete safety for end-users and sensitive analog components
• Enhanced Thermal Management: High-thermal-conductivity resin acts as an internal heat sink, resulting in cooler operation under continuous full-load conditions
• Industrial Mount Integrity: Heavy-duty housing with integrated mounting holes and rigid PCB-mount pins ensures secure mechanical interface in high-vibration environments

The Multi-Tap Primary Design (1-8-10-12) allows system designers to select exact input voltage requirements for different regional markets or compensate for line voltage drops. The Low Current Output (20mA - 40mA) is calibrated for high-precision feedback loops or sensor excitation where current stability is critical.

The High-Vacuum Potting Process removes all air bubbles from the internal structure, eliminating the risk of "partial discharge" that can degrade insulation over time. Cold-Rolled Silicon Steel laminations minimize hysteresis and eddy current losses, providing higher efficiency than standard alternatives.

Our EI57 utilizes high-thermal-conductivity epoxy resin injected under vacuum, ensuring every microscopic gap between copper wire turns is filled. This creates a monolithic, solid-state internal structure offering unprecedented heat dissipation and mechanical strength.

Precision-stamped silicon steel sheets with specialized insulating coating reduce eddy current losses. Optimized stacking factor maximizes magnetic flux density without reaching saturation, allowing handling of slight over-voltage conditions without overheating risk.

The black plastic shell is molded from specialized engineering thermoplastic rated for high-temperature resistance and self-extinguishing flammability. Integrated mounting feet with reinforced holes allow secure bolting to chassis or DIN-rail adapters.

Every EI57 unit undergoes high-resolution automated inspection and full electrical sweep testing under load, significantly reducing total cost of ownership by eliminating incoming inspection failures and field returns.

Primary choice for power stages of PLCs, temperature controllers, and industrial timers. Robust isolation and environmental sealing ensure stable, clean power to prevent system crashes and production downtime in automated factories and petrochemical facilities.

Prized for clean power output and low noise floor, essential for high-accuracy weighing scales, laboratory oscilloscopes, and medical diagnostic peripherals where even microvolt noise can skew results.

Used in control boards of high-end boilers, water heaters, and climate control systems. Encapsulated design protects from humidity and thermal cycling, while silent operation benefits consumer-facing appliances.

Provides stable, noise-free power for pre-amplifiers, mixer consoles, and networking switches. Low electromagnetic footprint ensures no interference with delicate analog audio signals or high-speed data transmission lines.

Chipsen Electronics is a professional manufacturer specializing in high-performance transformers and magnetic components, with over 26 years of manufacturing expertise. Founded in 2000, we operate 4 production bases covering 7,200 square meters with over 400 skilled employees.

We hold authoritative certifications including ISO9001, ISO14001, and IATF16949, with product approvals from UL Class B/F/H, CQC, RoHS, and REACH. Our portfolio includes 36+ utility patents supported by a robust in-house R&D team.

• Full Service Customization: Rapid design support within 24-48 hours based on your specifications
• Extensive Product Portfolio: 200+ product types including high frequency transformers, toroidal transformers, and inductors
• Advanced Manufacturing: Automated winding and assembly machines improving efficiency by 8x while maintaining quality
• Strict Quality Control: 100% testing procedures including electrical performance, insulation, and reliability tests
• High Voltage Expertise: Specialized in 5KV to 40KV high voltage transformers and high-frequency power solutions
• Flexible Production: Support from prototype to bulk production with lead times of 7-15 days