Square D KHL36110-1021 Molded Case Circuit Breaker
- 110A
- 3 Pole
- Unit Mount
Quantity
Square D KHL36110-1021 - 110A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Engineered for remote operation, the KHL36110-1021 is a 3-pole, 110A molded case circuit breaker featuring a factory-installed shunt trip. This legacy K-Frame device delivers reliable thermal-magnetic protection for industrial environments. The unit mount configuration installs into Square D enclosures and switchboards. It serves as a replacement for older K-Frame installations and is superseded by the PowerPacT J-Frame series. Capable of 35kAIC at 480V, it includes an adjustable magnetic trip.Specifications
| Brand | Square D |
|---|---|
| Part Number | KHL36110-1021 |
| Series | KHL |
| Amperage | 110A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | KHL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Enclosures, Switchboards, Motor Control Centers |
| 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 | Line and Load Lugs Included, Shunt Trip (Factory Installed) |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity |
Product FAQs
7 answersWhat does the -1021 suffix mean on the KHL36110-1021?
The -1021 suffix indicates that this breaker includes a factory-installed 120/240VAC shunt trip. This accessory allows the breaker to be tripped remotely via a voltage signal, which is frequently required for emergency shutdown or safety interlock systems.
How is the KHL36110-1021 installed in an electrical system?
As a unit-mount, feed-thru circuit breaker, it is designed to be individually mounted within a switchboard or enclosure. It wires directly via lugs on both the line and load sides, rather than connecting directly to a panelboard bus like plug-on or bolt-on breakers.
Is the trip unit on the KHL36110-1021 adjustable?
Yes, this breaker features a thermal-magnetic trip unit where the thermal (overload) protection is fixed at 110A, but the magnetic (short-circuit) trip threshold can be adjusted. This allows for precise coordination with other protective devices in your electrical system.
What wire sizes are accepted by the lugs on this breaker?
The standard line and load lugs accept aluminum or copper conductors ranging from 4 AWG to 350 kcmil. Ensure proper torque specifications are applied during installation to prevent terminal overheating.
Can the KHL36110-1021 be used in DC applications?
Yes, in addition to its AC ratings, this breaker is suitable for DC systems up to 250VDC. It provides a 10kA interrupting capacity for DC applications, making it viable for battery backups or industrial DC control panels.
What types of equipment is this breaker compatible with?
This legacy K-Frame breaker is designed for installation in compatible Square D enclosures, motor control centers, and switchboards that accommodate unit-mount configurations.
What is the modern replacement for the legacy K-Frame series?
The KHL36110-1021 belongs to the legacy Square D K-Frame series, which has been superseded by the PowerPacT H-Frame and J-Frame series for new installations. This specific K-Frame breaker is typically used to maintain or expand existing enclosures and switchboards without requiring retrofitting.
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