Littelfuse's 438A series 0603 size surface mount fuses are fast-acting AECQ-compliant fuses. They offer excellent temperature stability, performance reliability, and high I²t values ensuring high inrush current withstand capability. The 438A series are specifically tested to cater to secondary circuit protection needs of compact auto electronics applications like navigation systems and battery management systems (BMS). The 438A series is offered in amperage ratings ranging from 250 mA up to 6 A.