Littelfuse PICO® II 521 AEC-Q200 Very Fast-Acting Fuses are designed to meet an extensive array of performance characteristics in a space-saving sub-miniature package. The axial lead and cartridge fuses feature a 2A to 7A current rating and a 75V maximum voltage rating in an operating temperature range of -55°C to +125°C. The fuses are ideal for secondary protection of battery management systems.