The Siemens 3RV1913-7E is a lockable emergency switching-off handle designed specifically for the 3RV1913 enclosure. It's an EMERGENCY OFF mushroom-head actuator with a key-lock latching mechanism — you push it in to stop, twist and key to reset. That IP55 rating means the handle and its seal keep out dust and low-pressure water jets, so it's suited for washdown areas on a production floor or outdoor-adjacent panels where a standard IP20 handle would corrode or let moisture into the enclosure.
Depth is 84 mm. That's the dimension from the panel face to the back of the handle mechanism — critical when you're fitting it into a shallow enclosure or one with a door-mounted disconnect. The handle mounts to the 3RV1913 enclosure door; there's no transparent cover option on this variant, so the mushroom head is directly exposed for quick access. It latches in the OFF position and requires the key to unlatch, which meets the lockout/tagout requirement of keeping the circuit physically blocked until the keyholder releases it.