ABB / Trumbull ATT337225 Molded Case Circuit Breaker
- 225A
- 3 Pole
- Bolt-On
Quantity
ABB / Trumbull ATT337225 - 225A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Part of the legacy AT frame lineup, the ATT337225 is a 3-pole, 225-amp molded case circuit breaker built for commercial and industrial applications. It provides a straightforward maintenance solution for facilities utilizing older electrical infrastructure. This bolt-on MCCB installs into Trumbull switchboards and GE panelboards, ensuring an exact fit without modification. When upgrading, the TFK236225 serves as the modern substitute. It features a 30kAIC rating at 480VAC and LI protection.Specifications
| Brand | ABB / Trumbull |
|---|---|
| Part Number | ATT337225-R |
| Series | ATT |
| Amperage | 225A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 30kA @ 480VAC, 22kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Trumbull Switchboards, GE Panelboards |
| Wire Gauge | 1 AWG - 300 kcmil |
| 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 |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Lug Kits |
|---|---|
| Accessories | Lugs Not Included |
| Standards | UL 489 |
| Approval | UL |
| Temp Rating | 40°C |
| Construction Features | Common Trip, Interchangeable Trip Unit |
Product FAQs
5 answersWhat types of enclosures or panels is the ATT337225 compatible with?
This legacy AT frame breaker is designed for use in older Trumbull switchboards and General Electric (GE) panelboards that accept bolt-on molded case circuit breakers.
What wire sizes are accepted by the lugs on this breaker?
The factory lugs accommodate wire sizes ranging from 1 AWG up to 300 kcmil. Always ensure proper torque specifications are followed during installation to prevent loose connections.
How does the fixed thermal magnetic trip unit operate on this model?
The breaker features an LI trip function, meaning it provides fixed Long-Time protection for overloads and fixed Instantaneous protection for short circuits. Neither the thermal nor the magnetic trip points are adjustable.
Why is this breaker listed under ABB, Trumbull, and GE?
Trumbull was historically acquired by General Electric, and GE's industrial breaker division was later acquired by ABB. This legacy breaker may be found in older systems under the Trumbull or GE brand names.
What safety checks are recommended before installing this legacy breaker?
Before installing this legacy AT frame breaker, a licensed electrician should inspect the contacts, verify lug torque, and ensure the panel busbars are de-energized and free of debris.
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