437A Surface Mount Fuses Littelfuse 437A Surface Mount Fuses offer a wide temperature range of -55°C to +150°C and are AECQ-compliant. The 437A series is tested to cater to the secondary circuit protection needs of compact auto-electronics applications. The general design of these fuses ensures excellent temperature stability and performance reliability. Additionally, the high I2t values typical of the Littelfuse 437A fuses ensure high inrush current withstand capability. Littelfuse 437A Surface Mount Fuses are suitable for TFT displays, battery management systems, clusters, LED lighting, and automotive navigation systems.