SM91514AL-E

Pulse Transformers Overview

The SM91514AL-E is an automotive-grade BMS signal transformer and common mode choke manufactured by Bourns Inc. It features a surface mount design with six pins, single winding configuration, and 4.3kVDC isolation voltage. The component operates within a temperature range of -40°C to +125°C and complies with AEC-Q200 standards. Key electrical parameters include an inductance of 300µH and a turns ratio of 1:1. Physical dimensions are approximately 7.62mm in length, 6.73mm in width, and 5.72mm in height.

Pulse Transformers Feature Summary

• AEC-Q200 compliant for automotive reliability
• High isolation voltage of 4.3kVDC
• Surface mount package for automated assembly

Pulse Transformers Applications

• Battery Management Systems (BMS)
• Automotive signal isolation
• Common mode noise suppression

Pulse Transformers Procurement Notes

Verify the specific suffix 'E' against the manufacturer's current datasheet to confirm compliance with RoHS directives and halogen-free status. Ensure that the ordering information matches the required packaging format, such as cut tape or reel, as specified in the official procurement documentation. Cross-reference the part number with the latest revision history to avoid discrepancies in pinout or mechanical dimensions during integration.

Pulse Transformers Selection Notes

Select this component for applications requiring robust signal integrity in high-voltage automotive environments. The 300µH inductance provides effective common mode rejection while maintaining a compact footprint suitable for space-constrained PCB layouts. Consider the 125°C maximum operating temperature when designing thermal management strategies for enclosed battery packs or under-hood electronics.

Pulse Transformers Part Context

This component belongs to the SM915xx series of automotive transformers from Bourns. These parts are designed specifically for electric vehicle and hybrid vehicle architectures. The series emphasizes high reliability and small form factors to support modern electrification trends. Similar models in the family may vary in pin count, inductance values, or physical dimensions while sharing the same automotive qualification standards.

Pulse Transformers Replacement Considerations

Direct substitutes must match the 6-pin SMD footprint, 300µH inductance, and 4.3kV isolation rating. Verify that any alternative part also holds AEC-Q200 certification for automotive use. Check for compatibility with existing reflow soldering profiles and ensure the replacement maintains the same functional role in the BMS circuit without altering signal timing characteristics.