Square D KDL22175 Molded Case Circuit Breaker
- 175A
- 2 Pole
- Unit Mount
Quantity
Square D KDL22175 - 175A 2 Pole Molded Case Circuit Breaker
New
Quantity
Description
Designed to protect commercial electrical systems, the Square D KDL22175 is a 2-pole, 175A molded case circuit breaker. It operates at 240VAC and utilizes standard thermal-magnetic trip technology to deliver dependable LI fault protection. This K-Frame MCCB utilizes a unit mount configuration with feed-thru connections, allowing it to integrate into Square D QO 3-phase load centers and enclosures. With an interrupting capacity of 25kAIC at 240V, it safely clears standard fault currents.Specifications
| Brand | Square D |
|---|---|
| Series | KDL |
| Amperage | 175A |
| Poles | 2 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC |
| Phase | 1 |
| 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
9 answersWhat equipment is the Square D KDL22175 compatible with?
This K-Frame breaker is designed for installation in Square D QO 3-phase load centers, switchboards, and standalone Square D enclosures that accept unit-mount breakers.
How does the feed-thru connection on the KDL22175 work?
As a unit-mount, feed-thru breaker, it does not plug onto a busbar. Instead, it bolts directly to the backpan or enclosure and uses mechanical lugs for both the line and load wire connections.
What wire sizes and materials are supported by the KDL22175 terminals?
The factory lugs accept both aluminum (Al) and copper (Cu) conductors, accommodating wire gauges from 6 AWG up to 350 kcmil.
What type of protection does the LI trip function provide?
The LI designation means the thermal-magnetic trip unit includes Long-Time (L) protection for sustained overloads and Instantaneous (I) protection for immediate short-circuit clearing. Both settings are fixed on this specific model.
Are the trip settings adjustable on the KDL22175?
No, this breaker features fixed thermal and fixed magnetic trip settings. It does not offer adjustable dials for the trip curve.
Is the KDL22175 suitable for 480V applications?
No. This breaker is rated for a maximum of 240VAC. Using it on a 480V or 600V system exceeds its design limits and poses a severe safety hazard.
What does the 25kAIC rating indicate for this breaker?
The 25kAIC rating means the breaker can safely interrupt up to 25,000 amps of fault current at 240VAC without rupturing or causing an electrical fire.
Is the KDL22175 a current production model or a legacy breaker?
The KDL22175 is a legacy K-Frame molded case circuit breaker. While it predates the newer Square D PowerPact series, it remains widely used for replacements in existing switchboards and enclosures.
Can this 2-pole breaker be used in a 3-phase load center?
Yes. While it only has two poles, it can be installed in a compatible 3-phase QO load center or switchboard to supply power to a single-phase, 240V load.
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