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Bourns SM91572AL BMS Transformer

Bourns SM91572AL Battery Management Systems (BMS) Transformer is an AEC-Q200-compliant, automotive-grade, and single-channel functional insulation BMS signal transformer. This transformer integrates common-mode chokes to provide noise rejection and solid isolation in BMS communication circuits. The integrated common mode chokes eliminate the need for external filtering components, resulting in a shorter BOM for automotive and energy storage BMS designs. The SM91572AL BMS transformer features a Hi-Pot isolation voltage up to 3000VAC, 1000VDC working voltage, and pin auto-termination. This transformer supports serial daisy-chain and IsoSPI communication and is developed for use with Analog Devices’ LTC681x, NXP’s MC33771/MC33772, and Texas Instruments’ BQ79616 devices. The SM91572AL BMS transformer is ideal for BMS in hybrid and electric powertrain systems and energy storage battery packs with BMS.

Features

  • Pin auto-termination
  • 3000VAC Hi-Pot
  • 1000VDC working voltage
  • Single channel with integrated choke
  • Developed for use with Analog Device’s LTC6804-1/681X, NXP’s MC33771/ 33772, and TI’s BQ79616
  • AEC-Q200 qualified
  • RoHS compliant (RoHS directive 2015/863, Mar 31, 2015, and Annex)
  • Functional insulation

Applications

  • Battery Management Systems (BMS) in hybrid and electric powertrain systems
  • Energy storage battery packs with BMS

Electrical Schematic

Schematic - Bourns SM91572AL BMS Transformer

Dimensions

Mechanical Drawing - Bourns SM91572AL BMS Transformer
Published: 2026-07-16 | Updated: 2026-07-20