Mersen Amp-Trap® 30A Class J Fast-Acting Fuse 600V, Model A4J30
Mersen Amp-Trap® 30A Class J Fast-Acting Fuse 600V, Model A4J30
Pickup available at Independent Electric Supply
Usually ready in 4 hours
The Mersen Amp-Trap® A4J30 is a 30-amp, Class J current-limiting fuse engineered for demanding electrical installations where speed and protection are non-negotiable. Rated for 600 V AC / 300 V DC with an exceptional 200/100 kA interrupting capacity, this fast-acting fuse is the go-to choice for professional electricians and contractors protecting motor controls, panelboards, and industrial equipment on the job site. Its rejection-style ferrule design ensures it can only be installed in Class J fuseholders, eliminating the risk of misapplication — a critical safeguard when working on live commercial or industrial systems. Whether you're protecting variable frequency drives, disconnects, or distribution equipment, the A4J30 delivers the reliable, code-compliant overcurrent protection your installations demand.
Specifications
| Brand | Mersen |
| Series | Amp-Trap® A4J |
| MPN | A4J30 |
| Amperage Rating | 30 A |
| Voltage Rating | 600 V AC / 300 V DC |
| Interrupting Capacity | 200 kA AC / 100 kA DC |
| Fuse Class | Class J |
| Fuse Type | Current Limiting, Fast Acting |
| Rejection Type | Rejection (Class J Fuseholder Only) |
| Terminal Type | Ferrule |
| Mounting Type | Clip Mount |
| Body Style | Cylindrical |
| Body Material | Polyester |
| Body Dimensions | 13/16 in Dia x 2-1/4 in L |
