Bourns Expands Products for Automotive and Industrial Needs
Bourns has released several new products designed for signal isolation, high-power current sensing, and surge protection in industrial, automotive, and renewable energy applications.
The SM91872AL is an AEC-Q200 compliant, automotive-grade signal transformer designed to provide control signal isolation in high-voltage electric vehicles and energy storage battery management systems (BMS). Its design incorporates over-molding constructed with a fully automated process to contain costs.
Six new model types (RSN, RS, RSH, RSI, RSJ, and RSW) have been added to Bourns’ line of Riedon Industrial Shunt Resistors that offer improved current handling capabilities across a wide measurement range of 1 A to 1200 A for BMS, solar inverter, and similar high-power applications.
The Model PTVS1-240C-M PTVS Diode is, according to Bourns, the first ever 240 V/1 kA Bi-directional Power Transient Voltage Suppressor (PTVS) in surface mount packaging, offering increased power density for the protection of industrial power, battery energy storage systems, and other line-powered equipment.
SM91872AL BMS signal transformer.
Cost-Effective, Automotive Grade BMS Transformer
Within a battery energy storage system or EV battery management system, the BMS transformer helps pass control signals across the isolation boundary between the BMS controller and high voltage battery bus.
To do this job, the Model SM91872AL single-channel BMS transformer provides a working voltage of up to 1000 V and a Hi-Pot isolation voltage of up to 4000 VAC, with a creepage/clearance distance of more than 10 mm.
BMS signal transformer application.
The AEC-Q200-compliant BMS transformer is specified for an extended operating temperature of -40°C to 125°C and is constructed with an automated over-molding process adding extra reliability without sacrificing cost-effectiveness for price-sensitive automotive applications.
Improved Industrial Current Sensing
Bourns’ line of Riedon shunt resistors are used for industrial and other current sensing applications. A current shunt is a specialized resistor that lies in series with the load and derives system current levels from its voltage properties (V = I x R).
Measuring current with a shunt.
The six new model types (RSN, RS, RSH, RSI, RSJ, and RSW) of the Riedon series shunts accommodate measured current levels ranging from 1 A to 6000 A with resistance values as low as 0.0417 mΩ for minimal power loss. Tolerances down to 0.25% ensure the accuracy of the current measurements.
The current shunts can support both panel (up to 1000 A) and busbar (up to 6000 A) mounting configurations.
RSW series busbar mounting.
PTVS Diode Offers More Power Density
According to Bourns, the Model PTVS1-240C-M PTVS Diode is the industry’s first 240 V/1 kA bidirectional power transient voltage suppressor (PTVS) available in surface mount packaging.
PTVS diodes are used to protect sensitive electronics from high energy, high voltage, and high current transients generated by events such as indirect lightning strikes, electrostatic discharges, and power surges.
The Model PTVS1-240C-M is particularly well suited for systems with high DC bus voltage architectures subject to high current switching transients and dynamic load behaviors.
PTVS diodes protect equipment from AC/DC power line surges.
The PTVS provides 1 kA of surge handling capacity when exposed to industry standard 8/20 µs test conditions (a transient that rises in 8 µs and decays to 50% of its peak value in 20 µs). This test waveform simulates the voltage pulse conditions that would be generated from a lightning strike.
The reduced PCB footprint of the Model PTVS1-240C-M SMT packaging offers significantly higher power density than comparable surge protection products.
