SM91508AL-E

Pulse Transformers Overview

The SM91508AL-E is an automotive-grade BMS signal transformer manufactured by Bourns. It features a 300 µH inductance and a 1:1 turns ratio, designed for high-frequency integrated choke applications. The component supports dual primary and dual secondary windings with SMD/SMT surface mount installation. It operates within a temperature range of -40°C to +125°C or +150°C depending on specific documentation variants, and includes a Hi-Pot rating of 3000 Vrms. The device is AEC-Q200 compliant and RoHS compliant.

Pulse Transformers Feature Summary

• Automotive-grade construction compliant with AEC-Q200 standards
• High-voltage isolation capability with 3000 Vrms Hi-Pot rating
• Integrated high-frequency choke design for compact PCB mounting

Pulse Transformers Applications

• Battery Management System (BMS) signal isolation
• High-voltage isolation in automotive electronics
• Pulse transformer applications in electric vehicle powertrains

Pulse Transformers Procurement Notes

Verify the specific operating temperature rating (+125°C vs +150°C) against the latest official datasheet, as sources vary. Confirm AEC-Q200 compliance status directly with the manufacturer documentation. Ensure the package type matches the required surface mount footprint dimensions of 17.4 mm x 8.5 mm x 3.8 mm. Check for any ordering suffixes that may indicate specific tape-and-reel quantities or lead-free variations.

Pulse Transformers Selection Notes

Select this component for applications requiring robust galvanic isolation in automotive environments. The 1:1 ratio suits direct signal coupling needs without voltage transformation. Consider the planar transformer architecture for low-profile designs. Validate thermal performance at maximum ambient temperatures to ensure reliability within the specified operational window.

Pulse Transformers Part Context

This part belongs to Bourns' SM91 series of BMS signal transformers. These components are engineered specifically for the automotive sector, addressing the need for reliable communication between battery cells and management controllers. The series emphasizes compactness and high insulation resistance to meet stringent automotive safety standards.

Pulse Transformers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Consult Bourns technical support for cross-reference information regarding equivalent automotive-grade pulse transformers with similar inductance and isolation ratings.