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Square D KHL3615017DC1684 Molded Case Circuit Breaker
- 150A
- 3 Pole
- Unit Mount
Square D
KHL3615017DC1684
Molded Case Circuit Breaker
Brand
Square D
SKU
KHL3615017DC1684
Quantity
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Square D KHL3615017DC1684 - 150A 3 Pole Molded Case Circuit Breaker
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Description
A specialized solution for industrial power distribution, the Square D KHL3615017DC1684 is a 3-pole, 150A legacy MCCB. It delivers reliable overcurrent protection in commercial environments, fitting into Square D switchboards. Equipped with a unit mount configuration, this breaker includes an undervoltage release and an auxiliary switch for advanced system integration. Capable of handling demanding loads, it offers a 20kAIC rating at 500VDC and features thermal-magnetic (LI) protection.Specifications
| Brand | Square D |
|---|---|
| Part Number | KHL3615017DC1684-R |
| Series | KHL |
| Amperage | 150A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 20kA @ 500VDC |
| Frame Type | K |
|---|---|
| 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 | Shunt Trip, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Line and Load Lugs Included, Undervoltage Release (Factory Installed), Auxiliary Switch (Factory Installed) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | High Interrupting Capacity, HACR Rated, 500VDC Rated |
Product FAQs
7 answersWhat do the suffixes in the KHL3615017DC1684 catalog number indicate?
The DC suffix designates its direct current rating, while the 17 and 1684 suffixes indicate factory-installed internal accessories. This specific model is equipped with a 24VDC undervoltage release (UVR) and an auxiliary switch for advanced control system integration.
What type of lugs are included with the KHL3615017DC1684, and what wire sizes do they accept?
This breaker includes AL250KA lugs on both the line and load sides. These lugs accept aluminum or copper wire ranging from 4 AWG to 350 kcmil.
Can the KHL3615017DC1684 be installed in an I-Line panelboard?
No, this is a feed-thru, unit-mount circuit breaker. It is designed to be bolted directly to the mounting pan or chassis in compatible Square D enclosures, switchboards, and motor control centers, rather than plugging onto an I-Line bus.
How does the trip unit operate on this K-Frame breaker?
It utilizes a thermal-magnetic trip unit with LI (Long-Time and Instantaneous) functions. The thermal element provides fixed protection against overloads, while the magnetic element is adjustable to fine-tune short-circuit protection based on your specific load requirements.
How does the factory-installed undervoltage release enhance system safety?
The 24VDC undervoltage release automatically trips the breaker if the control voltage drops below a predetermined level. This prevents motors and other critical loads from restarting unexpectedly when power is restored, protecting both personnel and equipment.
Is the KHL3615017DC1684 strictly limited to DC applications?
Although it features a specialized 500VDC rating with a 20kAIC interrupting capacity, it is also fully rated for alternating current. It provides up to 65kAIC at 240VAC, 35kAIC at 480VAC, and 25kAIC at 600VAC.
Can I use this breaker to replace an older Square D K-Frame MCCB?
Yes, the KHL3615017DC1684 shares the same physical dimensions and mounting footprint as other legacy Square D K-Frame breakers. Verify that the 150A rating, feed-thru mounting, and internal accessories match your existing system requirements before installation.
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