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Square D HDL36150CU31X Molded Case Circuit Breaker
- 150A
- 3 Pole
- Unit Mount
Square D
HDL36150CU31X
Molded Case Circuit Breaker
Brand
Square D
SKU
HDL36150CU31X
Quantity
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Square D HDL36150CU31X - 150A 3 Pole Molded Case Circuit Breaker
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Description
Built for demanding continuous loads, this 150A PowerPacT H-Frame MCCB carries a 100% rating to maximize circuit capacity. It utilizes a factory-installed Micrologic 3.2 trip unit to deliver precise, adjustable long-time and instantaneous (LI) protection. The unit mount design fastens securely into industrial control panels and switchboards. It provides an excellent modern substitute for standard 80% rated KAL36150 breakers, ensuring accurate fault detection even with harmonic distortion.Specifications
| Brand | Square D |
|---|---|
| Part Number | HDL36150CU31X |
| Series | HDL |
| Amperage | 150A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480VAC, 14kA @ 600VAC, 20kA @ 250VDC |
| Frame Type | HDL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Industrial Control Panels, Switchboards, Enclosures |
| Wire Gauge | 14 AWG-3/0 AWG (Al/Cu) |
| Max Wire | 3/0 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Motor Operator, Rotary Handle, Padlock Attachment |
|---|---|
| Accessories | Micrologic 3.2 Trip Unit (Factory Installed) |
| Standards | CSA C22.2 No 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, Visual Trip Indicator, Reverse Feed, True RMS Sensing, 100% Rated |
Product FAQs
8 answersWhat does the "C" in the HDL36150CU31X catalog number indicate?
The "C" indicates that this circuit breaker is 100% rated. This allows the breaker to carry its full 150A continuous current rating without the standard 80% derating requirement, maximizing circuit capacity.
What type of trip unit is installed in the HDL36150CU31X?
This breaker features a factory-installed Micrologic 3.2 electronic trip unit. The U31X suffix designates adjustable long-time and instantaneous (LI) protection for precise fault detection.
Can the HDL36150CU31X be used in single-phase applications?
Yes. Square D PowerPacT H-Frame breakers with Micrologic 3.2 trip units are marked for single-phase use, but only on 240VAC circuits. You can use any two poles for this application.
Is the HDL36150CU31X a direct replacement for older KAL series breakers?
The PowerPacT H-Frame is the modern replacement for legacy Square D KAL36150 breakers. Because this is a 100% rated breaker with an electronic trip unit, verify your panel mounting and continuous load requirements before retrofitting.
How does the HDL36150CU31X mount into an electrical panel?
This is a unit-mount circuit breaker. It fastens directly to the panel or enclosure backpan using screws, rather than plugging onto an I-Line bus system.
Does the Micrologic 3.2 trip unit in this breaker provide ground fault protection?
No. The U31X suffix indicates an LI trip unit, which provides long-time and instantaneous protection only. It does not include ground fault or short-time protection functions.
What wire sizes are accepted by the lugs on this 150A H-Frame breaker?
The factory-installed lugs accept 14 AWG to 3/0 AWG aluminum or copper wire. Ensure proper torque specifications are followed during installation.
What is the DC interrupting rating for the HDL36150CU31X?
When used in direct current applications, this breaker is rated for up to 250VDC with a maximum interrupting capacity of 20kA.
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Customers rate this product 4.0 out of 5 based on 1 review.
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1 review
- DTDave T.ReviewingSquare D HDL36070 - 70A 3 Pole Molded Case Circuit BreakerI recommend this productRated 4 out of 5 stars3/31/22The shipping was very fast
The shipping was very fast and accurate!