Its C-curve trip characteristic (5–10× In) makes it suitable for protecting circuits with moderate inrush — think lighting banks, small motor starters, or general-purpose socket outlets where the load isn't purely resistive but doesn't need the higher headroom of a D-curve.
ABB S261-C40 DIN Rail MCB, 40A C-Curve
MPNS261-C40
ABB System pro M compact S261-C40, 40 A C-curve miniature circuit breaker, DIN rail mount, 0.14 kg.
$71.60Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Specifications
| Parameter | Value |
|---|---|
| Weight | 0.14 kgs |
Product details
Frequently asked questions
Where can I buy S261-C40 and how do I get a price?
The S261-C40 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commercial offer.
Will S261-C40 drop into a panel that was specified around S273-K40A without rewiring?
The S273-K40A is a 3-pole version (0.45 kg) while the S261-C40 is single-pole (0.14 kg). They share the same System pro M compact platform and DIN-rail footprint, but the pole count is different — you cannot directly substitute a single-pole for a three-pole without rewiring the circuit and possibly the busbar arrangement.
MPN
S261-C40