Square D KH361751021 Molded Case Circuit Breaker
- 175A
- 3 Pole
- I-Line
Quantity
Square D KH361751021 - 175A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Delivering reliable thermal-magnetic protection, this 175A K-frame molded case circuit breaker handles commercial and industrial applications. It installs into Square D I-Line panelboards and switchboards, providing a secure connection for high-capacity distribution systems. Rated at 65kAIC at 240V, the unit features a factory-installed 120-240VAC shunt trip for remote tripping capabilities. Note that this legacy component has been replaced by the JJA36175SA in modern installations.Specifications
| Brand | Square D |
|---|---|
| Part Number | KH361751021 |
| Series | KH |
| Amperage | 175A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards and Switchboards |
| 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 | Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Shunt Trip (Factory Installed), Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity, Visual Trip Indicator, Trip-Free Mechanism, Common Trip |
Product FAQs
5 answersWhat does the 1021 suffix mean on the KH361751021 catalog number?
The -1021 suffix indicates that this breaker includes a factory-installed 120/240 VAC shunt trip accessory. This allows the breaker to be tripped remotely by an external voltage signal.
Can this breaker be installed in a standard Square D QO or Homeline panel?
No. This breaker features an I-Line plug-on mounting design. It is exclusively compatible with commercial and industrial Square D I-Line panelboards and switchboards.
How is the trip unit configured on this KH frame breaker?
It features a thermal-magnetic trip unit with a fixed thermal overload set at 175 amps. The instantaneous magnetic trip is adjustable, allowing you to set the short-circuit response between 875A and 1750A for proper system coordination.
Are the standard lugs on this breaker rated for aluminum wire?
Yes, the factory-installed load lugs are dual-rated for both aluminum (Al) and copper (Cu) conductors, accepting wire sizes from 4 AWG up to 350 kcmil.
Is the KH frame still in active production?
The KH frame is a legacy product line. While it is frequently sourced for direct replacements in existing I-Line panels, Schneider Electric has superseded this frame size with the modern PowerPact J-frame series for new installations.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
- DPDouglas P.ReviewingSquare D KH36225 - 225A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars5/26/23I got it the next
I got it the next day and it worked just like it should. Thank you