What this 160 A MCCB carries
The 3VA2116-5HM42-0CC0: The interrupting ratings climb with the voltage drop: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. That 187 kA at 240 V tells you this breaker handles high-fault utility feeds or transformer secondaries where the available fault current is brutal — it's not a light-duty branch breaker. Thermal derating is flat from 40 °C to 70 °C — the full 160 A holds across that entire band. That's unusual; most breakers start derating at 40 °C. If your panel runs hot near a drive or transformer, this holds its rating without a bump in frame size.
Undervoltage release and auxiliary switch fit
Factory-fitted with an undervoltage release (UVR) that trips the breaker when control voltage drops below a threshold — common in safety circuits where a loss of control power must open the main disconnect. The UVR is the design-of-release type, so it's integral, not a field-add-on. Two auxiliary switches (HQ design) are built in, giving you status feedback — open/closed indication to a PLC or a remote panel lamp. No separate aux block to buy and snap on; it's already inside the cover. Ground-fault monitoring uses summation current formation on the L + N conductor — it compares line and neutral current to detect leakage. That's a residual-current method, not a zero-sequence CT, so it works on solidly-grounded systems where you need GF protection without a separate RCD.
Physical fit and panel integration
Dimensions: 140 mm wide, 181 mm tall, 86 mm deep. That 86 mm depth is the body only — add clearance for handle throw and cable bending radius behind the panel. It's a standard SENTRON 3VA frame size, so if you've landed a 3VA2116-5HL32-0AK0 or 3VA2116-5JP32-0AE0 in the past, the mounting footprint and bus-bar centers are identical. No re-drilling or re-bussing needed for a swap. Rated insulation voltage is 800 V, which covers 480/277 V and 600 V systems with margin. The 28 W maximum power loss at full load matters for thermal calculations in a sealed enclosure — that's heat that has to be vented or the internal ambient climbs past the 70 °C operating limit.
Sourcing and lifecycle posture
If you're replacing an older 3VA breaker or cross-referencing from a competitor's frame, the 3VA2116-5HM42-0CC0 drops into the same panel footprint as the 3VA2116-5HL32-0AK0 (same frame, same bus-bar centers). The difference is in the trip unit and accessories — the -5HM42-0CC0 carries the UVR and dual aux switches pre-installed, so you don't need to order those separately.