Bourns SM91581AL series automotive grade BMS signal transformer

The Bourns model SM91581AL is an AEC-Q200 compliant, automotive grade signal transformer designed for single-channel reinforced insulation in battery management system (BMS) applications. Its 1800VDC working voltage (reinforced insulation) and 8,400VDC Hi-Pot isolation rating allow communication through high-voltage battery strings, with creepage and clearance distances exceeding 23.7mm.

Features

• Hi-Pot: 8400 VDC
• Basic insulation per reinforced insulation IEC 62477-1:2022 & IEC 62477-2:2018, working voltage up to 2500 VDC
• Reinforced insulation per reinforced insulation IEC 62477-1:2022 & IEC 62477-2:2018, working voltage up to 1800 VDC
• Creepage distance >23.7 mm, pollution degree 2, material group CTI I
• Clearance distance >23.7 mm, Overvoltage Category II, up to 5000 m above sea level
• AEC-Q200 and RoHS compliant*

Applications

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

^{* RoHS Directive 2015/863, Mar 31, 2015 and Annex.}