ABB A2A125TT Molded Case Circuit Breaker
- 125A
- 3 Pole
- Unit Mount
ABB
A2A125TT
Molded Case Circuit Breaker
Brand
ABB
SKU
A2A125TT
Quantity
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ABB A2A125TT - 125A 3 Pole Molded Case Circuit Breaker
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Description
Providing 10 kAIC of interrupting capacity at 240VAC, the A2A125TT is a 3-pole, 125A molded case circuit breaker from ABB's Formula A2 series. Designed for robust commercial and industrial power distribution, it features a fixed thermal-magnetic trip unit. This unit mount breaker installs into OEM enclosures, DIN rails, and ReliaGear panelboards. It also acts as a functional replacement for discontinued TQD32125 breakers, though mounting dimensions vary. Line and load lugs are included.Specifications
| Brand | ABB |
|---|---|
| Series | Formula |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | ABB Formula Panelboards, ReliaGear Panelboards, OEM Enclosures, DIN Rail |
| Wire Gauge | 1 AWG - 250 kcmil (Cu/Al) |
| Max Wire | 250 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, Rotary Handle, Padlock Attachment, DIN Rail Adapter, Terminal Shields |
|---|---|
| Accessories | Line and Load Lugs Included (KA2225) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL, cULus |
| Temp Rating | -25C to 70C |
| Construction Features | Reverse Feed |
Product FAQs
5 answersWhich ABB panelboards accept the A2A125TT circuit breaker?
It is commonly used as a main or sub-feed breaker in ABB ReliaGear lighting panelboards, specifically the RQ, RL, RE, and RS series, as well as standard ABB Formula panelboards.
What type of wire can be used with the A2A125TT lugs?
The factory-installed lugs are rated for both copper and aluminum conductors, accommodating wire sizes from 1 AWG up to 250 kcmil.
How does the fixed thermal-magnetic trip unit operate on the A2A125TT?
The fixed thermal-magnetic trip unit provides non-adjustable Long-Time and Instantaneous protection. The thermal element protects against sustained overloads, while the magnetic element trips immediately during a short circuit.
Is the A2A125TT a direct replacement for the GE TQD32125?
It acts as a functional replacement for the discontinued 125A 3-pole GE TQD32125. Because it belongs to the newer ABB Formula A2 frame, the physical mounting dimensions differ from the legacy TQD frame, so retrofit adjustments may be necessary during installation.
Does the A2A125TT provide adjustable trip settings?
No, this breaker features a fixed thermal and fixed magnetic trip unit. The trip curve is factory-set and cannot be adjusted in the field, which prevents unauthorized or accidental changes to the protection limits.
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