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ABB XT4NU3150AFF000XXX — Molded Case Circuit Breakers (MCCB)

ABB XT4NU3150AFF000XXX XT4N 3-Pole 150A 600VAC Panel Mount M

MPNXT4NU3150AFF000XXX

ABB XT4N series molded case circuit breaker, order code XT4NU3150AFF000XXX, 3-pole, 150 A continuous, 600 VAC, 65 kA interrupting rating, panel mount.

ABB XT4NU3150AFF000XXX datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

XT4NU3150AFF000XXX — Specifications
ParameterValue
Amps150
Poles3
MountingPanel
Volts AC600
Breaking capacity65 kA

Product details

The ABB XT4NU3150AFF000XXX is a 3-pole molded case circuit breaker from the XT4N series, rated for 150 A continuous current at 600 VAC.

Panel-mounted design — no DIN rail adapter. The breaker bolts directly to a backplate or enclosure sub-panel, which is typical for MCCB sizes above 100 A where the mechanical forces during a short-circuit event are higher than a snap-on foot can reliably hold. Plan for a drilled and tapped mounting pattern; the XT4N frame footprint is shared across the 160 A and 250 A TMF versions, so a panel layout can be standardized across multiple breaker ratings.

What the 150 A rating means in practice

For motor branch circuits, this typically protects a 75–100 HP motor at 480 V (depending on full-load amps and starting curve). The 3-pole configuration handles three-phase loads; the breaker interrupts all three phases simultaneously on a fault, which is required by code for polyphase motor and feeder protection.

Frequently asked questions

What is the interrupting rating of XT4NU3150AFF000XXX?

65 kA at 600 VAC. This is the maximum fault current the breaker can safely interrupt without damage to itself or downstream equipment, assuming proper series rating coordination.

Where can I buy XT4NU3150AFF000XXX?

Sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — no stock or price figures are published here.

What is the closest alternative to XT4NU3150AFF000XXX in the XT4 family?

Within the same XT4N frame, the 160 A TMF version (XT4NU3160AFF000XXX) shares the same panel footprint, mounting pattern, and 65 kA interrupting rating — the difference is the thermal-magnetic trip rating. For a 150 A load, the 160 A unit provides a slightly higher continuous threshold; verify coordination with your upstream protective device before substituting.

MPN
XT4NU3150AFF000XXX