The K-curve is engineered for motor and inductive-load protection — it tolerates the inrush of a starting motor without nuisance tripping, then clears a hard fault fast. In a panel, that means you can size it for the running current, not the start surge.
S801U-K90 MCB S800 1P K 90A, current lifecycle
MPNS801U-K90
ABB S800 series, MCB, 1-pole, K-curve, 90 A, order code S801U-K90.
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026
Product details
Frequently asked questions
What is S801U-K90 used for?
It is a 90 A single-pole MCB with a K-trip curve, designed to protect motor circuits and inductive loads from overcurrent and short circuits in a DIN-rail panel.
Where can I buy S801U-K90?
Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for the latest position.
MPN
S801U-K90