ABB / General Electric TB43400 Molded Case Circuit Breaker
- 400A
- 3 Pole
- Bolt-On
Quantity
ABB / General Electric TB43400 - 400A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Built for high-fault commercial applications, the GE TB43400 delivers 400A of continuous current handling. It is part of the Tri-Break TB4 frame series. The bolt-on configuration mounts securely into GE Tri-Break panelboards, switchboards, and motor control centers. It accommodates up to 600 kcmil conductors. With a massive 200 kAIC rating at 600VAC, this breaker utilizes an internally fused design. Current limiters must be sourced separately.Specifications
| Brand | ABB / General Electric |
|---|---|
| Part Number | TB43400 |
| Series | TB4 |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 200kA @ 480VAC, 200kA @ 600VAC |
| Frame Type | TB4 |
|---|---|
| Terminal Type | Lugs |
| For Use With | GE Tri-Break Panelboards, GE Switchboards, Motor Control Centers |
| Wire Gauge | 6 AWG - 600 kcmil (Al/Cu) or (2) 2/0 AWG - 250 kcmil (Al/Cu) |
| Max Wire | 600 kcmil |
| Min Wire | 6 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Auxiliary Switch, Shunt Trip, Undervoltage Release, Lug Kits, Current Limiters |
|---|---|
| Accessories | Lugs Not Included, Current Limiters Not Included |
| Standards | NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, Internally Fused, Interchangeable Trip |
| Special Features | Integrally Fused |
Product FAQs
6 answersWhat enclosures and panelboards are compatible with the TB43400?
This 400A Tri-Break breaker is designed for installation in GE Tri-Break panelboards, GE switchboards, and compatible motor control centers.
What are the accepted wire sizes for the standard lugs on this breaker?
The terminals accept either a single 6 AWG to 600 kcmil conductor or two 2/0 AWG to 250 kcmil conductors per phase. Both aluminum and copper wires are supported.
Can the trip settings on the TB43400 be adjusted?
Yes, while the thermal long-time trip is fixed at 400A, the instantaneous magnetic trip is adjustable. This allows electricians to coordinate the breaker with downstream loads and other protective devices.
Is the 200kAIC interrupting rating applicable at all voltage levels?
Yes, this breaker maintains a maximum interrupting capacity of 200kAIC across 240VAC, 480VAC, and 600VAC systems, providing robust fault clearing for high-capacity industrial networks.
How is the TB43400 secured within a panelboard?
It utilizes a bolt-on connection type. The breaker must be bolted directly to the busbars of a compatible GE chassis using the appropriate mounting hardware.
How does the thermal-magnetic trip unit protect industrial circuits?
The thermal element provides long-time protection by heating up and tripping during sustained overloads, while the magnetic element offers instantaneous tripping to quickly clear severe short circuits before equipment damage occurs.
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