What this 3VM1116-4EE36-0AA2 brings to the panel
This SENTRON 3VM1116-4EE36-0AA2 is a 3-pole molded case circuit breaker rated for 160 A continuous current, with a frame size that tops out at 160 A. The breaking capacity class S means it interrupts 121 kA at 240 V AC and still clears 76 kA at 415 V — numbers that matter when you're coordinating selectivity downstream of a transformer or a big motor feeder. The TM220 thermal-magnetic release gives you adjustable overload protection from 112 A to 160 A, and fixed short-circuit pickup at 10× In, so it's a straight-ahead line-protection breaker, not a motor-protection piece with electronic adjustments.
Breaking capacity — what the numbers mean for your fault duty
The 121 kA at 240 V is the headline number, but out here in the grease the 76 kA at 415 V is what tells you whether this breaker holds on a 400 V distribution bus. At 440 V it still clears 53 kA, and at 500 V it drops to 11.9 kA. The rated insulation voltage is 690 V, so the internal creepage and clearance are built for a 600 V class system even though the max operational voltage is 500 V AC. That's a solid safety margin for a 480 V plant.
Thermal performance across the temperature range
The breaker carries its full 160 A from 40 °C up through 50 °C without derating. At 55 °C it's still at 158 A, at 60 °C it's 155 A, and at 65 °C it's 153 A. At the top end of 70 °C ambient you're at 150 A. That's a shallow derate curve — useful if the breaker lives in a crowded panel next to a transformer or a drive cabinet where the internal temperature runs hot. The operating range spans -25 °C to 70 °C, and storage goes from -40 °C to 80 °C.
Connection and mounting details
The main circuit connects via box terminals arranged for front connection — standard for panel-mounted MCCBs where you're landing cable lugs or bus bars from the front. There are no auxiliary contacts included (0 CO contacts), and there's no provision for a motor drive or neutral conductor retrofit. The protection class on the front is IP40, so it's fine inside a closed panel but not for washdown areas. The overcurrent release is the TM220 thermal-magnetic type with LI (long-time and instantaneous) protection, no ground-fault monitoring.