Built for heavy-duty commercial environments, this 100A molded case circuit breaker offers dependable long-time and instantaneous protection. The three-pole unit installs into ReliaGear SB switchboards and standard ABB enclosures, acting as an exact upgrade path for older Tmax T1 series hardware. Operating with a fixed thermal-magnetic trip unit, the device achieves a 50kA interrupting rating at 240VAC and features a current-limiting design to minimize potential fault damage.
Shunt Trip, Auxiliary Switch, Undervoltage Release, Padlock Attachment, Motor Operator
Accessories
None (Standard)
Standards
CSA C22.2 No. 5, HACR, IEC 60947-2, UL 489
Approval
CE, CSA, cULus, IEC, RoHS, UL
Temp Rating
-25C to 70C
Construction Features
HACR Rated, Current Limiting, Reverse Feed, Double Insulated
Product FAQs
6 answers
What is the global ABB part number for the XT1NU3100AFF000XXX?
The alternate global catalog number for this 100A Tmax XT1 breaker is 1SDA074646R1. Both numbers refer to the exact same 3-pole, fixed thermal-magnetic device.
Are the thermal and magnetic trip thresholds adjustable on the XT1NU3100AFF000XXX?
No, this breaker is equipped with a TMF (Thermomagnetic Fixed) trip unit. Both the long-time overload (thermal) and instantaneous short-circuit (magnetic) protection settings are fixed at the factory and cannot be adjusted in the field.
Which switchboards are designed to accept the XT1NU3100AFF000XXX breaker?
This unit-mount, bolt-on circuit breaker is specifically designed for installation in ABB ReliaGear SB switchboards and compatible standard ABB enclosures.
What does the letter N in the XT1NU3100AFF000XXX catalog number signify?
The letter N indicates that this breaker has a Normal interrupting capacity for the XT1 frame size. This classification provides a maximum interrupting rating of 50kAIC at 240VAC and 25kAIC at 480VAC.
Can the XT1NU3100AFF000XXX be utilized in DC power systems?
Yes, this thermal-magnetic breaker is rated for direct current applications up to 500VDC. It delivers a 35kAIC interrupting rating at 250VDC, allowing it to protect both AC and DC distribution circuits.
What is the maximum frame capacity for the XT1NU3100AFF000XXX?
While this specific breaker is configured for a 100A continuous current rating, it is built on the ABB Tmax XT1 frame, which supports a maximum capacity of 125A.
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