What this 3VA is and what it carries
The Siemens 3VA1163-3EE32-0AA0 is a SENTRON molded case circuit breaker (MCCB) built for line protection — the main disconnect or feeder breaker in a distribution panel, sized for a 63 A bus at 40 °C ambient, with a TM220 thermal-magnetic release that handles overloads and short-circuits without an external trip unit. Rated 63 A continuous at 40 °C, it derates to 58 A at 70 °C — the thermal curve matters if this lands in a hot enclosure next to drives or transformers. Breaking capacity hits 75.6 kA at 240 V, 52.5 kA at 415 V, and 32 kA at 440 V — enough for most industrial secondary distribution, but check your available fault current at the point of installation.
Panel fit and mounting
Three-pole, 70 mm deep, 76.2 mm wide, 130 mm tall — standard MCCB footprint for a 3-pole 63 A frame, bolts into a distribution panel or mounts on a mounting plate. IP40 on the front means it's protected against tools and wires >1 mm, but not against water — keep it inside a closed panel, not in a washdown zone. Rated insulation voltage 800 V, so it's comfortable on 480/277 V or 600 V systems without derating the insulation path.
Lifecycle and sourcing posture
Marked as current-production lifecycle stage — this is not an NRND or obsolete line; Siemens continues to manufacture the 3VA series. No official successor order code exists because the part is still active. Sourced to order against an RFQ through independent distribution channels; current pricing and availability confirmed at quote time.
What the TM220 release means on the line
TM220 designates a thermal-magnetic release — the thermal element handles overloads (inverse time curve), the magnetic element handles short-circuits (instantaneous). No electronic trip unit, no communication, no ground-fault monitoring built in. Max power loss 17.3 W at rated load — negligible for panel heat budget, but worth noting if you're stacking a dozen of these in a sealed enclosure. Operating range -25 °C to 70 °C; storage from -40 °C to 80 °C — shipping and storage limits are wider than running limits, as usual.