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Square D KDL32125 Molded Case Circuit Breaker
- 125A
- 3 Pole
- Unit Mount
Square D
KDL32125
Molded Case Circuit Breaker
Brand
Square D
SKU
KDL32125
Quantity
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Square D KDL32125 - 125A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Square D KDL32125 - 125A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | KDL32125 |
| Series | KDL |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D QO 3-Phase Load Centers, Square D Enclosures, Switchboards |
| Wire Gauge | 6 AWG - 350 kcmil (Al/Cu) |
| Max Wire | 350 kcmil |
| Min Wire | 6 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, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip |
Quantity
Square D KDL32125 - 125A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | KDL32125 |
| Series | KDL |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D QO 3-Phase Load Centers, Square D Enclosures, Switchboards |
| Wire Gauge | 6 AWG - 350 kcmil (Al/Cu) |
| Max Wire | 350 kcmil |
| Min Wire | 6 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, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip |
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Description
Serving as a reliable component for power distribution, the KDL32125 is a 125A, 3-pole molded case circuit breaker by Square D. It is designed to safeguard commercial and industrial electrical infrastructure. The breaker mounts into Square D QO 3-phase load centers, switchboards, and compatible enclosures using a feed-thru connection. Delivering a 25 kAIC interrupt capacity at 240VAC, it utilizes thermal-magnetic trip technology (LI) and accommodates 6 AWG to 350 kcmil aluminum or copper wire.Specifications
| Brand | Square D |
|---|---|
| Part Number | KDL32125 |
| Series | KDL |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D QO 3-Phase Load Centers, Square D Enclosures, Switchboards |
| Wire Gauge | 6 AWG - 350 kcmil (Al/Cu) |
| Max Wire | 350 kcmil |
| Min Wire | 6 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, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip |
Product FAQs
7 answersWhat does the D in the KDL32125 catalog number signify?
In Square D legacy K-frame nomenclature, the D indicates an interrupting rating of 25kAIC at 240V AC.
What enclosures and panels are compatible with the KDL32125?
This unit-mount breaker is designed for installation in Square D QO 3-phase load centers, standalone Square D enclosures, and compatible switchboards.
What wire sizes are accepted by the lugs on this breaker?
The factory lugs accommodate conductor sizes ranging from 6 AWG to 350 kcmil and are rated for both copper and aluminum wiring.
How is the KDL32125 circuit breaker mounted?
It features a unit-mount, feed-thru design. It bolts directly to the enclosure backpan or mounting surface rather than plugging onto a busbar, utilizing lugs on both the line and load sides.
Is the Square D KDL32125 still actively manufactured?
The legacy K-frame series is obsolete. Facilities looking for a modern equivalent typically migrate to the Square D PowerPact series, though retrofitting may require enclosure modifications or adapter hardware.
How does the trip unit on the KDL32125 operate?
It utilizes a thermal magnetic trip mechanism with fixed thermal and fixed magnetic settings. This provides standard LI (Long-Time and Instantaneous) protection against overloads and short circuits.
What are the primary safety requirements when installing this K-frame breaker?
Installation must be performed by a qualified electrician. Always de-energize the switchboard or load center, verify zero voltage with a calibrated meter, and follow all applicable NEC guidelines and local codes before terminating conductors.
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