KOA Introduces High Power Ceramic Cased Resistors for Automotive Pre-Charge / Discharge

KOA is introducing a new range of wire wound and metal oxide high power resistors in a ceramic case, dedicated to automotive pre-charge/discharge applications.

• BGRV wirewound resistors – designed to withstand the high inrush currents present in Electric Vehicle pre-charge circuits.
• BWRV wirewound resistors – features lower resistance values as well as improved T.C.R. and tight resistance tolerances.
• BSRV metal oxide resistors – designed for the capacitor discharge function in the DC/DC converter and in Electric Vehicle discharge circuits.All 3 resistor series are available with spade/lug terminals for use in wiring harness or connector blocks.

Product Features

• High reliability, suitable for automotive applications Excellent inrush current withstand characteristics Excellent overload performance
• Optional ‘quick connect’ terminals
• Flame-retardant ceramic case 1 Ω…75 kΩ
• ±5 % or ±10 %
• 3W…40W
• Operating temperatures up to +155 °C Tested acc. to AEC-Q200 requirements EU-RoHS compliant

Application Examples

• Battery unit / inverter circuits for automotive electronics (HEV, EV, PHEV, FCV)
• Pre-charge circuit of electric vehicle (BGRV, BWRV) Discharge circuit of electric vehicle (BSRV)
• On board car charger
• Industrial converter / inverter

Example of Application Circuit

Source: KOA