For a 40A option in the JLS Series, Littelfuse specifies JLS040. For circuit selection, the principal values are 600V AC and 200kA AC breaking capacity. The fast-acting, current-limiting design targets surge-sensitive industrial and power-conversion equipment. Use the linked Littelfuse datasheet to confirm coordination, approvals and installation details.
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Part JLS040 carries a 40A rating within the Littelfuse JLS Series. The device is rated for 600V AC and carries a published 200kA AC breaking capacity. The fast-acting, current-limiting design targets surge-sensitive industrial and power-conversion equipment. For installation, the listed format is Class J; mounting is Cartridge / Clip, with ferrule / blade (amp-dependent) terminals. Published dimensions are 60.3mm length; 27.0mm max body diameter. Typical applications include Power Electronics, Variable Speed Drives, Rectifiers, Resistive Loads, Solid-State Devices. Check the official Littelfuse datasheet before final coordination.
L70QS150
150A · 700 V AC/DC
L70QS125
125A · 700 V AC/DC
L70QS100
100A · 700 V AC/DC
L70QS090
90A · 700 V AC/DC
L70QS080
80A · 700 V AC/DC
L70QS070
70A · 700 V AC/DC
L70QS060
60A · 700 V AC/DC
L70QS050
50A · 700 V AC/DC