PCS040-EF1305KS

Current Sense Transformers Overview

The Bourns PCS040-EF1305KS is a surface-mount current sense transformer designed for high-frequency power conversion applications. It features a primary current rating of 40 A and a turns ratio of 1:80. The component exhibits a maximum inductance of 5.44 mH, with a primary resistance of 1 mOhm and a secondary resistance of 1.15 Ohms. Operating effectively up to 1 MHz, it utilizes the EF12.6 core geometry. The device supports SMD/SMT installation styles and functions within a maximum operating temperature of +125°C, providing robust isolation and accurate current sensing for demanding electronic circuits.

Current Sense Transformers Feature Summary

• Provides precise current sensing through a 1:80 turns ratio configuration
• Supports high-frequency operation up to 1 MHz for efficient power management
• Features low primary resistance of 1 mOhm to minimize conduction losses
• Utilizes compact EF12.6 core geometry for space-constrained board designs

Current Sense Transformers Applications

• High-frequency switching power supplies
• Isolated gate drive circuits
• Current feedback loops in DC-DC converters
• Automotive power electronics systems

Current Sense Transformers Procurement Notes

Verify the specific suffix KS against the manufacturer's latest datasheet to confirm package dimensions and tape-and-reel specifications. Ensure compatibility with peak current requirements exceeding 40 A if transient loads are present. Confirm RoHS compliance status and lead-free finish details directly with authorized distributors prior to ordering. Cross-reference the part number with official Bourns documentation to avoid substitution errors with similar series components.

Current Sense Transformers Selection Notes

Select this component when a high-current rating of 40 A is required alongside a specific 1:80 transformation ratio. The low primary resistance makes it suitable for minimizing insertion loss in high-efficiency designs. Consider the 1 MHz frequency limit when designing for fast-switching topologies. The surface-mount format facilitates automated assembly processes for high-volume manufacturing environments.

Current Sense Transformers Part Context

This model belongs to the Bourns PCS Series of current sense transformers, which are engineered for isolated current measurement in power electronics. The series offers various ratios and current ratings to suit different power levels. The EF12.6 designation indicates the specific magnetic core size used in this variant, balancing performance with physical footprint constraints typical in modern PCB layouts.

Current Sense Transformers Replacement Considerations

Consult the official Bourns cross-reference guide for verified substitutes. Direct replacements must match the 1:80 ratio, 40 A rating, and 5.44 mH inductance. Verify that alternative parts maintain identical pinout configurations and thermal characteristics to ensure seamless integration without circuit redesign.