Mersen A6T40 Amp-Trap Fast Acting Fuse. Ferraz Shawmut Amp-Trap® Fast Acting Fuse, Current Limiting Low Voltage, Series: A6T, Indicating/Non-Indicating: Non-Indicating, Rejection/Non-Rejection: Non-Rejection, 40 A, 600 VAC/300 VDC, 100/200 kA Interrupt, Class: T, Ferrule Terminal, Clip Mount, Cylindrical Body, Single Element, Fiber, 0.81 in Dia x 1.57 in L Body Size. Additional Description: MERS-A6T40 600V 40A CLASS T FUSE. Catalog Description: Fast-acting A6T Class T fuses combine two highly desirable features - high current-limitation and a small physical size. Their unique dimensions prevent the substitution of other fuses with lower voltage ratings or current-limiting capability. These fuses have glass melamine bodies for superior dimensional stability and catalog numbers stamped into the blades for permanent identification. 600 Volts 40 amps..