Delivering robust power distribution, the ABB XT4NU3200AFJ000XXX is a 3-pole, 200A molded case circuit breaker equipped with a fixed thermal-magnetic trip unit. It is built for demanding commercial and industrial environments. The breaker mounts into ABB ReliaGear neXT panelboards and SB switchboards, and can replace legacy Tmax T4 series breakers when used with a retrofit kit. It features a 65kAIC rating at 240V, current-limiting capabilities, and double insulation for enhanced safety.
Does the ABB Tmax XT4 replace legacy GE Spectra RMS breakers?
The ABB SACE Tmax XT line is the direct replacement for the discontinued GE Spectra RMS series. Because the physical dimensions and mounting footprints differ, retrofit kits or enclosure modifications are required when upgrading from a legacy GE breaker to a Tmax XT4.
Is the XT4NU3200AFJ000XXX suitable for reverse feeding?
Yes. Because this breaker uses a thermal magnetic trip unit without directional sensitivity, it does not have line and load restrictions and can be safely reverse fed in standard configurations.
Can I install auxiliary contacts or a shunt trip in this breaker?
Yes. The SACE Tmax XT4 frame supports field-installable internal accessories. Shunt opening releases, undervoltage releases, and auxiliary contacts can be snapped into the dedicated accessory pockets located under the front cover.
What does the letter N indicate in the XT4NU3200AFJ000XXX catalog number?
The N designates the interrupting capacity class for this frame. For the Tmax XT4, N denotes a Normal interrupting rating of 25kAIC at 480VAC. Applications requiring higher fault current protection will use a different class letter, such as S, H, L, or V.
Does this breaker provide ground fault protection?
No. This model features a fixed thermal and fixed magnetic trip unit with Long-Time and Instantaneous (LI) protection only. It does not include integral ground fault protection.
How does a unit mount breaker install into a ReliaGear neXT panelboard?
To install a standard unit mount XT4 breaker into a ReliaGear neXT panelboard or SB switchboard, a specialized ReliaGear neXT plug-in mounting assembly must be attached to the breaker. This allows the breaker to securely attach to the bus stack.
Can the trip settings on the XT4NU3200AFJ000XXX be adjusted in the field?
No. This specific breaker features fixed thermal and fixed magnetic trip settings. If your application requires adjustable overload or short circuit protection, you will need an XT4 frame equipped with an Ekip DIP or Ekip Touch electronic trip unit.
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