Square D - HDL36150 150A 3-Pole 600V Feed-Thru Molded Case Circuit Breaker
Square D - HDL36150 150A 3-Pole 600V Feed-Thru Molded Case Circuit Breaker
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The Square D HDL36150 is a 3-pole, 150-amp thermal magnetic molded case circuit breaker (MCCB) rated for 600VAC with feed-through (feed-thru) mounting. Manufactured by Schneider Electric, this HD-frame breaker provides dependable overload and short-circuit protection for industrial and commercial main and feeder circuits. The feed-through design makes it well-suited for service entrance and main distribution board applications where top and bottom terminal access is required.
Specifications
| Attribute | Value |
|---|---|
| Part Number | HDL36150 |
| Manufacturer | Square D / Schneider Electric |
| Amperage Rating | 150A |
| Voltage Rating | 600VAC |
| Number of Poles | 3 |
| Trip Type | Thermal Magnetic |
| Mount Type | Feed-Thru |
| Interrupting Rating | 65kA @ 240V / 25kA @ 600V |
| Standard | UL 489 Listed |
| Frame Series | HD |
Key Features
- Feed-through mounting for main breaker and service entrance applications
- Thermal magnetic trip for accurate overload (time-delay) and short-circuit (instantaneous) protection
- 150-amp rating for medium-capacity main and feeder circuits
- 3-pole design for three-phase 600V systems
- Compact HD-frame fits a range of Square D panelboards and switchboards
- UL 489 Listed, NEC compliant
Common Applications
- 150A main breaker in commercial and light industrial panelboards
- Service entrance protection for three-phase 600V systems
- Industrial sub-panel feeder protection
- Manufacturing facility distribution boards
- Feed-through circuit breaker in switchboard assemblies
Frequently Asked Questions
What is the Square D HDL36150?
The Square D HDL36150 is a 150-amp, 3-pole, 600V thermal magnetic feed-through MCCB used as a main or feeder breaker in three-phase commercial and industrial electrical distribution systems up to 600VAC.
What is the difference between feed-thru and I-Line plug-in mounting?
Feed-through breakers connect to the bus and have separate line and load terminal connections for hard-wiring, commonly used as main breakers. I-Line plug-in breakers physically plug into a bus in a panelboard or switchboard for faster installation and removal without hard-wiring each phase.
What are the terminal options on the HDL36150?
The HDL36150 has standard lug terminals on both the line (top) and load (bottom) sides, accepting conductors sized for 150A feeders per NEC requirements. Consult Square D installation documentation for specific conductor sizing and torque specifications.