The thermal-magnetic element means it combines a bimetal strip for overload protection (slow response to sustained overcurrent) with a solenoid for short-circuit interruption (instantaneous on high fault current). At 250 A fixed, there's no adjustment range; what you order is what protects the circuit. The 3-pole configuration fits three-phase systems — common for motor loads, distribution panels, and industrial feeders. Frame mounting means it bolts into a panel or switchboard enclosure, not onto a DIN rail; plan for the cutout and bus-bar connections when laying out the gear.
ABB XT4NU3250AFF000XXX Tmax XT4N 250A 3-Pole Molded Case Bre
MPNXT4NU3250AFF000XXX
ABB Tmax XT4N, molded case circuit breaker, 250 A, 3-pole, thermal-magnetic fixed trip, frame mount, front flat terminals.
Independent distributor — new & surplus sourcingAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Specifications
| Parameter | Value |
|---|---|
| Amps | 250 |
| Poles | 3 |
| Mounting | Frame |
Product details
Frequently asked questions
Where can I buy XT4NU3250AFF000XXX and how is it quoted?
Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.
What are the key ratings of XT4NU3250AFF000XXX?
250 A continuous current, 3 poles, thermal-magnetic fixed trip, frame mount.
Will XT4NU3250AFF000XXX drop into a panel specified for XT5NU340ABNF000XXX?
No — the XT5 frame is physically larger and uses a different mounting footprint. They are not mechanically interchangeable without panel rework.
MPN
XT4NU3250AFF000XXX