The ABB S801U-K25 is a 1-pole K-curve miniature circuit breaker from the S800 series, rated at 25 A. The S800 series snaps onto standard DIN rail, fitting into control panels alongside contactors and relays. The 1-pole format occupies a single module width, which matters when filling a crowded gland plate or planning thermal derating within an enclosed panel.
ABB S801U-K25 MCB S800 1P K 25A, current lifecycle
MPNS801U-K25
ABB, S800 series, miniature circuit breaker (MCB), S801U-K25, 1-pole K-curve 25 A, lifecycle stage current.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Product details
Frequently asked questions
Where can I buy the S801U-K25 and get a price?
The S801U-K25 is sourced to order against an RFQ through independent distribution. Submit a request for quote to confirm availability and current pricing.
What is the S801U-K25's K-curve trip characteristic?
The K-curve trips between 10 and 14 times the rated current of 25 A, making it suitable for inductive loads such as motors and transformers where startup inrush could otherwise cause nuisance tripping on a B- or C-curve breaker.
MPN
S801U-K25