Unlike a standard MCCB, this unit carries no overload or short-circuit protection — it is a straight disconnect-only device, confirmed by the product designation 'switch disconnector' and the absence of any overcurrent release in the spec. What it does include is an undervoltage release (UVR) rated 120-127 V AC 50/60 Hz, plus 2 auxiliary switches HQ (changeover contacts).
Rated continuous current Iu of 100 A sets the maximum uninterrupted load this disconnect can carry. The 3VA1 frame is rated for up to 160 A frame size, so this unit has headroom in the frame but is current-limited by the internal disconnect assembly. Max rated operational voltage is 690 V AC 50/60 Hz and 500 V DC — the AC figure covers standard 400 V and 480 V industrial networks; the DC rating matters for battery banks or DC bus disconnects. The 2 kA limited-time rating (at 1 s and 0.5 s) is the short-time withstand current the disconnect can handle during fault clearing upstream — it is not a breaking capacity, since this is not a circuit breaker. Latching endurance of 15 000 cycles gives a service life baseline for maintenance scheduling.
Where It Goes — Deployment Context
This switch disconnector is designed for panel mounting with front terminals and busbar connection for the main current circuit. The 76.2 mm width (roughly 3 inches) matches standard MCCB panel cutouts — it occupies the same footprint as a 3-pole SENTRON 3VA MCCB.
What It Replaces or Backs Up
If you are replacing a failed switch disconnector in a legacy panel or looking for a critical spare, this 3VA1110-1AA32-0CC0 is a direct fit for any panel originally designed around a 3VA1-frame 3-pole disconnect with UVR and auxiliary contacts. The closest functional peer is the 3VA1110-5EE32-0DC0 — a full molded case circuit breaker with TM220 thermal-magnetic protection, same 100 A rating and same frame. The key difference: the 5EE32 provides overload and short-circuit protection (LI release), while the 1AA32 is disconnect-only. If your application requires overcurrent protection, you need the 5EE32 variant. If you only need a load-break disconnect with undervoltage release, this 1AA32 is the correct choice and avoids paying for protection you won't use.