ABB / Trumbull AT37200 Molded Case Circuit Breaker
- 200A
- 3 Pole
- Bolt-On
Quantity
ABB / Trumbull AT37200 - 200A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
A drop-in replacement for older Trumbull and GE legacy panelboards, the AT37200 is a 200A, 3-pole molded case circuit breaker. This bolt-on MCCB restores functionality to aging commercial infrastructure. Designed to mount into GE A-Series and classic Trumbull enclosures, this unit provides a seamless fit. For modern upgrades, it can be replaced by the TFK236200 or TQD32200 substitutes. Rated for 600VAC, this breaker features a 25kAIC rating at 240V and fixed thermal-magnetic trip functions.Specifications
| Brand | ABB / Trumbull |
|---|---|
| Part Number | AT37200-R |
| Series | Type AT |
| Amperage | 200A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 10kA @ 480VAC, 10kA @ 600VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Trumbull / GE Legacy Panelboards, GE A-Series Panelboards |
| Wire Gauge | 1 AWG - 300 kcmil (Al/Cu) |
| Max Wire | 300 kcmil |
| Min Wire | 1 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Accessories | Lugs Not Included |
|---|---|
| Standards | UL 489, NEMA AB-1 |
| Approval | UL |
| Temp Rating | 40C |
Product FAQs
5 answersWhich panelboards accept the AT37200 circuit breaker?
This bolt-on breaker is designed as a direct fit for older Trumbull switchboards, GE Legacy panelboards, and GE A-Series panelboards.
What are the wire gauge requirements for the AT37200 lugs?
The terminal lugs accommodate conductor sizes ranging from 1 AWG to 300 kcmil. They are dual-rated for terminating either aluminum or copper wiring.
What protection functions are provided by the LI trip unit?
The thermal-magnetic trip unit provides Long-Time (L) protection against sustained overloads and Instantaneous (I) protection against short circuits. Both the thermal and magnetic trip points are fixed.
What frame size does the AT37200 belong to?
It is part of the legacy AT Frame group, which is useful to know when sourcing replacement hardware or verifying physical dimensions in older GE and Trumbull enclosures.
What safety precautions should be taken before installing this bolt-on breaker?
Always de-energize the panelboard before installation. Verify that the busbars are completely powered down using a properly rated voltage tester before bolting the breaker to the bus and terminating the conductors.
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