Switch disconnector, not a breaker — what that means for your BOM line
The Siemens 3VA1110-1AA36-0CH0 is a SENTRON switch disconnector in MCCB-style packaging — IEC frame 160, 3-pole, rated 100 A continuous current (Iu) with a maximum operational voltage of 690 V AC 50/60 Hz or 500 V DC. Unlike a molded-case circuit breaker, this unit provides no overload or short-circuit protection; it is a manual disconnect and isolation device. That distinction matters when filling a BOM: if the line calls for a load-break switch with visible isolation gap, this fits. If the spec requires overcurrent protection, you need a different 3VA variant with a thermal-magnetic release. The front-terminal connection accepts clamp-type lugs, and the unit ships with an integrated undervoltage release (UVR) rated 120–127 V AC 50/60 Hz — a common coil voltage for North American control circuits. Two auxiliary switches (HQ type) plus one trip alarm switch are built in, giving three CO contacts for status feedback to a PLC or annunciator panel.
Footprint and panel integration
Dimensions are 70 mm deep, 76.2 mm wide, 130 mm tall — the same 3VA frame-160 footprint shared by the line-protection MCCB variants. That means it drops into the same panel cutout and bus-bar arrangement as a 3VA1112-5EF32-0CA0 or 3VA1110-5ED36-0AC0 without rewiring, provided the bus bars and lug terminals match. Front-face IP40 protection suits enclosed panel mounting; no washdown rating.