RS PRO 4.5A Time Lag Glass Cartridge Fuse, 5 x 20 mm, 250V AC, 125°C Rated 911-3420

RS PRO 911-3420 is a 4.5 ampere time lag glass cartridge fuse designed to safeguard electrical circuits by interrupting current flow during overload or short circuit conditions. It features a 5 x 20 mm cylindrical glass body which allows users to visually confirm the fuse state, facilitating easy maintenance.

This fuse is rated for 250 volts AC and can withstand operating temperatures from -55°C to 125°C, making it suitable for a range of environmental conditions. Its time lag characteristic (T speed rating) enables it to tolerate short-duration current surges without blowing immediately, ideal for applications with transient inrush currents such as motors, air conditioners, refrigerators, and pumps.

With a low breaking capacity design, it effectively interrupts lower fault currents to protect sensitive equipment. The fuse complies with multiple international standards including CSA, KTL, PSE GTE, UL, and RoHS, ensuring reliable safety and environmental compliance. The RS PRO 911-3420 fuse is crafted in Taiwan and fits standard fuse holders sized 5 x 20 mm, measuring approximately 20 mm in length and 5 mm diameter.

Common industrial and commercial use cases include electrical appliance protection, control panels, automotive circuits, and home/residential electrical safety applications. The glass body design offers clear indication of fuse continuity, aiding quick fault diagnosis and reducing downtime.

Features a 4.5 amp current rating suitable for moderate load circuits. Glass body enables visual inspection of fuse status. Time lag (T speed) rating provides anti-surge protection by tolerating transient current spikes.

Compact 5 x 20 mm fuse size fits standard panel mount holders. Operates safely up to 125°C maximum temperature. Breaks low fault currents safely with low breaking capacity (LBC). Constructed with durable glass material for consistent performance.

Certified to CSA, KTL, PSE GTE, UL and RoHS standards. Ideal for industrial, commercial, automotive, and residential electrical protection.

For users seeking dependable circuit protection solutions, the RS PRO 911-3420 glass Cartridge Fuse is an excellent choice. Browse our extensive selection of RS PRO electrical fuses on EnvMart for compatible accessories and expanded system safety.