78253/55JC-R

Overview

The Murata Power Solutions 78253/55JC-R is a specialty surface-mount transformer designed for the MAX253 controller. It features an inductance of 830 µH and a turns ratio of 1:1.31. The component supports a primary voltage rating of 5 V and a secondary current rating of 200 mA with a power rating of 1 W. Physical dimensions are 9.00 mm length, 9.52 mm width, and a maximum height of 6.35 mm. It operates within a temperature range of -40°C to +105°C and holds RoHS3 compliance.

Feature Summary

• Optimized magnetic design specifically engineered for integration with the MAX253 switching controller family.
• Compact surface-mount package facilitates automated assembly and reduces PCB footprint requirements.
• High insulation capability ensures safety isolation between primary and secondary windings.

Applications

• Power supply circuits utilizing the MAX253 DC-DC converter
• Isolated power stages in industrial control systems
• Embedded power modules requiring compact magnetics

Procurement Notes

Verify that the suffix '-R' corresponds to tape-and-reel packaging when ordering. Confirm the specific inductance value matches the circuit design requirements. Ensure the operating temperature range aligns with the application environment. Check for RoHS3 compliance status if environmental regulations apply. Validate pinout compatibility with the target PCB layout.

Selection Notes

Select this component only when using the MAX253 controller architecture. Compare the 830 µH inductance against alternative variants like the 78253/55JVC-R which offers different magnetic properties. Consider the physical height constraint of 6.35 mm for enclosure clearance. Evaluate the 200 mA secondary current limit against peak load demands.

Part Context

This part belongs to the 78253J series of specialty transformers manufactured by Murata Power Solutions. These components are distinct from general-purpose power transformers as they are tuned for specific controller families. The series provides standardized footprints to simplify design-in processes for common isolated converter topologies.

Replacement Considerations

The 78253/55JC is the non-reel variant of this component. Other series members include the 78253/55JVC-R with different inductance values. Verify electrical equivalence before substituting with generic transformers.