Square D KAL36110 Molded Case Circuit Breaker | 110A 3-Pole 600V Feed-Thru
Square D KAL36110 Molded Case Circuit Breaker | 110A 3-Pole 600V Feed-Thru
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Square D KAL36110 – 110 Amp 3-Pole Thermal Magnetic Molded Case Circuit Breaker
The Square D KAL36110 is a heavy-duty thermal magnetic molded case circuit breaker engineered for reliable overcurrent protection in demanding commercial and industrial power distribution systems. Part of Square D's trusted KAL Series (K-Frame), this breaker delivers consistent performance where robust protection and precise trip coordination are critical.
Designed with a feed-thru connection type, it includes both line and load side lug terminals, making it ideal for panelboards, switchboards, and motor control centers that require through-feed wiring configurations.
Key Specifications
| Catalog Number | KAL36110 |
| Manufacturer | Square D (Schneider Electric) |
| Series | KAL Series – K-Frame |
| Ampere Rating | 110A @ 40°C |
| Voltage Rating | 600 VAC (50/60 Hz) / 250 VDC |
| Number of Poles | 3-Pole, 3-Phase |
| Trip Type | Thermal Magnetic – Adjustable Trip |
| Trip Functions | LI – Long-Time & Instantaneous |
| Connection Type | Feed-Thru (Line & Load Side Lug Terminals) |
| Interrupting Rating @ 240V | 42 kAIC |
| Interrupting Rating @ 480V | 25 kAIC |
| Interrupting Rating @ 600V | 22 kAIC |
| Interrupting Rating @ 250 VDC | 10 kAIC |
| Standards | UL Listed, CSA Certified |
| Frame | K-Frame (Molded Case) |
What Is a Molded Case Circuit Breaker (MCCB)?
A molded case circuit breaker (MCCB) is an electromechanical device used to protect electrical circuits from damage caused by overloads and short circuits. Unlike standard residential breakers, MCCBs like the KAL36110 are designed for high-ampacity industrial and commercial applications, offering adjustable trip settings, higher interrupting ratings, and greater durability under fault conditions.
Why Choose the Square D KAL36110?
- Thermal-Magnetic Trip Mechanism – Provides dual-mode protection: thermal sensing for overloads and magnetic sensing for instantaneous short-circuit response.
- Feed-Thru Design – Supports line and load side lug terminations for flexible wiring in panelboards and switchboards.
- High Interrupting Capacity – 42kAIC at 240V and 25kAIC at 480V for reliable fault clearing in high-energy systems.
- Adjustable Trip – Allows fine-tuning of the trip threshold to match specific application load profiles.
- UL Listed & CSA Certified – Meets strict North American electrical safety standards for commercial and industrial use.
- Square D / Schneider Electric Quality – Backed by one of the most trusted names in power distribution since 1902.
Common Applications
- Commercial and industrial panelboards
- Switchboards and motor control centers (MCCs)
- 3-phase power distribution systems
- HVAC and mechanical equipment circuits
- Manufacturing and process control environments
- Data centers and critical facility electrical infrastructure
Frequently Asked Questions
What does "feed-thru" mean on a circuit breaker?
A feed-thru circuit breaker includes both line-side and load-side lug terminals, allowing the electrical conductor to pass through the breaker. This configuration is common in applications where the breaker is used as a branch or feeder device within a panel, enabling more flexible wiring without the need for additional lugs or connectors.
What is the interrupting rating of the Square D KAL36110?
The KAL36110 has an interrupting rating of 42 kAIC at 240V, 25 kAIC at 480V, and 22 kAIC at 600V. At 250 VDC, it is rated for 10 kAIC. These ratings indicate the maximum fault current the breaker can safely interrupt without damage.
Is the Square D KAL36110 UL Listed?
Yes. The KAL36110 is both UL Listed and CSA Certified, confirming it meets the safety and performance standards required for use in North American electrical systems.
What is the difference between Long-Time (L) and Instantaneous (I) trip functions?
Long-Time (L) trip provides time-delayed protection against sustained overloads, allowing temporary current spikes (like motor start-up surges) without nuisance tripping. Instantaneous (I) trip provides immediate response to high-magnitude short-circuit faults, protecting equipment from severe damage.
Is this breaker compatible with Square D panelboards and switchboards?
Yes. The KAL36110, as part of the Square D KAL Series K-Frame, is designed for use in compatible Square D panelboards, switchboards, and motor control centers. Always verify compatibility with your specific enclosure model before installation.
What condition is this unit in?
This unit is listed as New (SKU: KAL36110-N). It has been inspected and is ready for installation. Contact us for questions about condition or documentation.