JM60030-1SR is a single-pole Class J modular ferrule fuse block designed for electrical panel and system protection up to 30 amps. It features a #10-32 Phillips-slot screw terminal configuration with a torque specification of 2.3 N-m (20 lb-in) and accepts wire gauges from 10 to 18 AWG at 75/90°C. The block incorporates a standard fuse clip reinforcing spring for enhanced electrical contact, standard phase barriers for safety, and a toolless interlocking modular design that allows multiple poles to snap together at point of use. It supports optional snap-on covers (both indicating and non-indicating types) for visual inspection and fuse indication, includes lockout/tagout rings for safety, and features DIN-Rail or panel mounting versatility. This design reduces inventory, assembly time, and labor while maintaining the smallest width dimension on the market for ferrule fuse blocks up to 60 amps.