PE-51687

Current Sense Transformers Overview

The PE-51687 is a through-hole current sense transformer manufactured by Pulse Electronics. It features a rated primary current of 20 A and operates within a frequency range of 20 kHz to 200 kHz. The device has an inductance of 20 mH, a primary resistance of 100 Ohms, and a secondary resistance of 1.4 Ohms. Its physical dimensions are 17.01 mm in length, 9.906 mm in width, and 20.32 mm in height. The unit weighs 10.152 g and utilizes a tray packaging format.

Current Sense Transformers Feature Summary

• Provides galvanic isolation between high-voltage primary circuits and low-voltage sensing electronics.
• Designed for accurate current monitoring in switching power supply applications.
• Supports surface or board mounting via through-hole technology.

Current Sense Transformers Applications

• Switch-mode power supply (SMPS) current monitoring
• Over-current protection circuits
• Power factor correction (PFC) systems

Current Sense Transformers Procurement Notes

Verify the specific ordering suffix to ensure correct electrical characteristics, as variations may exist within the product family. Confirm RoHS compliance status and lead times directly with authorized distributors. Check for end-of-life notices or alternative part recommendations if long-term supply stability is required for production.

Current Sense Transformers Selection Notes

Select this component when a 20 A primary current rating and 100:1 turns ratio are required. Ensure the operating frequency falls within the 20 kHz to 200 kHz range. Verify that the through-hole package dimensions fit the PCB layout constraints and thermal requirements of the target application design.

Current Sense Transformers Part Context

This component belongs to the Pulse Electronics Power series of current sense transformers. These devices are engineered for robust performance in industrial and commercial power conversion environments. The PE-51687 specifically targets applications requiring reliable current feedback for control loop regulation and system protection.

Current Sense Transformers Replacement Considerations

PE-51687NL is a documented variant with identical core specifications but potentially different packaging or environmental certifications. Cross-reference datasheets for pinout compatibility and electrical parameter equivalence before substitution.

Current Sense Transformers FAQ

What is the isolation voltage rating of the PE-51687?

The device supports a high potential of 3000 Vrms for isolation between primary and secondary windings.

What is the turns ratio of this transformer?

The PE-51687 has a primary-to-secondary turns ratio of 100:1.