Bussmann GMD-250-R Time Delay Fuse

The Bussmann GMD-250-R is a time-delay (slow-blow) glass cartridge fuse rated for 250 mA at 250 V AC, housed in the standard 5 × 20 mm form factor with nickel-plated brass end caps. As part of Eaton’s Bussmann GMD series, this 5x20 glass fuse is engineered to tolerate brief inrush currents while protecting circuits from sustained overcurrent events. With a 250 VAC rating and an interrupting capacity of 35 A at rated voltage, it provides robust protection for small power supplies, control electronics, and other components in equipment that experiences startup surges. The 0.25 A nominal rating means the fuse opens when current remains above this level beyond its time-delay window, preventing damage to downstream circuitry while allowing brief overloads to pass untriggered. The cylindrical glass body and end-cap construction align with common 5 × 20 mm fuse holders, making replacement straightforward in equipment designed for Bussmann’s standard fuse format. This model supports reliable time-delay protection in compact applications and is compatible with other GMD-series fuses to maintain consistent protection characteristics across a device family.