What this MCCB is and what it carries
The Siemens 3VA1116-4EF32-0CA0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection — the primary role is protecting cable and buswork from overcurrent and short-circuit faults, not motor or generator protection. It is a 3-pole unit rated 160 A at 40 °C, with a TM240 thermal-magnetic overcurrent release. The breaker carries an undervoltage release (UVR) as built-in auxiliary release, meaning it can be tripped remotely when control voltage drops, which is common in emergency-stop or safety isolation circuits.
Breaking capacity — what the voltages mean for your fault duty
This MCCB delivers 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. For a sourcing decision: if your panel's available fault current at the line side is, say, 65 kA at 415 V, this breaker has 10 kA of headroom above that — no coordination study needed to prove it holds. At 690 V the 11.9 kA figure is the limiting case; verify your system's prospective short-circuit current at that voltage does not exceed it.
Current rating and thermal derating
Rated 160 A continuously at 40 °C, 45 °C, and 50 °C — no derating needed up to that point. At 55 °C it drops to 158 A, at 60 °C to 155 A, at 65 °C to 153 A, and at 70 °C to 150 A. If your enclosure ambient runs 60 °C, you lose 5 A from the nameplate; plan your load at 155 A max continuous. The insulation voltage is rated 800 V, which covers 690 V systems with margin.
Physical fit and panel integration
Dimensions: 130 mm height, 76.2 mm width, 70 mm depth. That width is exactly 3 inches — standard for a 3-pole MCCB in a SENTRON panelboard or DIN-rail adapter. The 70 mm depth (2.76 in) means it clears a 100 mm deep enclosure with room for wiring gutters. No communication function, no ground-fault monitoring version — this is a straight thermal-magnetic breaker with undervoltage release only.
Environmental and operating limits
Operating temperature range: -25 °C to 70 °C. Storage range: -40 °C to 80 °C. Maximum power loss at rated load is 40.5 W — factor that into enclosure thermal rise calculations if the panel is densely populated. No trip indicator, no voltage trigger, no other measurement function.