CR4110-40

Overview

The CR4110-40 is a high-frequency transformer manufactured by CR Magnetics Inc., designed for use in switching power supply applications. This component features an ETD39 core configuration, providing efficient magnetic coupling and thermal management for medium-power conversion circuits. The unit incorporates a primary-to-secondary isolation barrier rated at 3000 VAC, ensuring safety compliance and protection against electrical faults in sensitive electronic systems. It supports a standard operating frequency range of 20 kHz to 50 kHz, making it suitable for various flyback and forward converter topologies. The device utilizes epoxy encapsulation to secure internal windings and protect against environmental contaminants, vibration, and mechanical stress during operation.

Feature Summary

• Provides robust electrical isolation between input and output circuits to ensure system safety.
• Utilizes an ETD39 core geometry to optimize magnetic flux distribution and minimize losses.
• Features durable epoxy encapsulation to withstand mechanical stress and environmental exposure.

Applications

• Switching mode power supplies (SMPS) requiring isolated DC-DC conversion
• Industrial control systems utilizing flyback or forward converter architectures
• Telecommunications equipment power modules

Procurement Notes

Verify the specific pinout configuration and winding ratio against the official datasheet before integration, as variations exist within the CR Magnetics product line. Confirm that the 3000 VAC isolation rating meets the safety requirements of the target application environment. Ensure the operating frequency range aligns with the intended switching controller specifications to maintain efficiency and prevent core saturation issues during procurement validation.

Selection Notes

Select this component when a medium-power isolated transformer with ETD39 core dimensions is required for frequencies up to 50 kHz. Consider the 3000 VAC isolation voltage as a critical factor for applications demanding high safety margins between primary and secondary sides. Evaluate the physical footprint compatibility with the printed circuit board layout prior to selection, as the ETD39 package size dictates spatial constraints within the final assembly design.

Part Context

CR Magnetics Inc. specializes in custom and standard magnetics components for power electronics. The CR4110 series represents their catalog offerings for general-purpose transformers. This specific model serves as a standardized solution for engineers designing reliable power conversion stages without the need for fully custom magnetic designs, balancing performance requirements with manufacturing availability.

Replacement Considerations

Direct replacements must match the ETD39 core size, 3000 VAC isolation rating, and compatible frequency range. Verify winding ratios and pin assignments to ensure functional equivalence. Generic substitutes may lack the specific encapsulation quality or electrical characteristics required for reliable long-term operation in regulated power supplies.