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Square D KCP34125 Molded Case Circuit Breaker
- 125A
- 3 Pole
- Bolt-On
Square D
KCP34125
Molded Case Circuit Breaker
Brand
Square D
SKU
KCP34125
Quantity
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Square D KCP34125 - 125A 3 Pole Molded Case Circuit Breaker
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Description
Built for commercial power distribution, the Square D KCP34125 is a 125A, 3-pole molded case circuit breaker. As part of the legacy K-Frame series, it delivers robust thermal-magnetic protection for industrial environments. Designed for Square D I-Line panelboards, this bolt-on breaker ensures a secure connection. Facilities maintaining older infrastructure can use this unit or upgrade to the PowerPact HJA36125. It features a 65kAIC rating at 480VAC and adjustable magnetic trip settings.Specifications
| Brand | Square D |
|---|---|
| Part Number | KCP34125 |
| Series | KCP |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480Y/277VAC, 480VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480Y/277VAC, 65kA @ 480VAC |
| Frame Type | KCL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards |
| Wire Gauge | 4 AWG - 350 kcmil (Al/Cu) |
| Max Wire | 350 kcmil |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Line and Load Lugs Included |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40°C |
| Construction Features | HACR Rated, Extra High Interrupting Capacity |
Product FAQs
6 answersWhich panelboards are compatible with the KCP34125 circuit breaker?
This legacy K-Frame breaker is designed specifically for installation in Square D I-Line panelboards.
What is the recommended modern replacement for the KCP34125?
For facilities upgrading older infrastructure, the Square D PowerPact HJA36125 is the manufacturer recommended replacement for this legacy K-Frame breaker.
What wire sizes and materials are supported by the KCP34125 terminals?
The included lugs accept both aluminum and copper conductors, accommodating wire sizes from 4 AWG up to 350 kcmil.
How does the interrupting capacity of the KCP34125 change based on system voltage?
The breaker provides a 65kAIC rating on 480VAC and 277VAC systems, and a higher 100kAIC rating when applied to 240VAC systems.
Are the trip settings on the KCP34125 adjustable?
The thermal-magnetic trip unit features a fixed thermal element for long-time overload protection and an adjustable magnetic element for instantaneous short-circuit protection.
What mounting method does the KCP34125 use?
It utilizes a bolt-on connection designed to secure the breaker within compatible Square D I-Line panelboard chassis.
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