Square D KAL36250 Molded Case Circuit Breaker | 250A 3-Pole 600V Feed-Thru
Square D KAL36250 Molded Case Circuit Breaker | 250A 3-Pole 600V Feed-Thru
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Square D KAL36250 – 250 Amp Thermal Magnetic Molded Case Circuit Breaker
The Square D KAL36250 is a heavy-duty, 3-pole thermal magnetic molded case circuit breaker (MCCB) engineered for reliable overcurrent protection in demanding commercial and industrial electrical systems. Part of the trusted KAL Series (KA-Frame) by Schneider Electric / Square D, this breaker delivers proven performance across a wide range of power distribution applications.
Whether you're replacing a failed breaker in a switchboard, panelboard, or motor control center, the KAL36250 is a direct OEM-equivalent solution rated for up to 600V AC, 3-phase service at 250 Amps.
Key Specifications
| Part Number | KAL36250 |
| Manufacturer | Square D / Schneider Electric |
| Series / Frame | KAL Series (KA-Frame, 70–250A) |
| Ampere Rating | 250A |
| Poles | 3-Pole (3PH) |
| Voltage Rating | 600V AC |
| Interrupting Ratings | 42 kAIC @ 240V AC | 25 kAIC @ 480V AC | 22 kAIC @ 600V AC | 10 kA @ 250V DC |
| Trip Type | Thermal Magnetic – LI (Long-Time & Instantaneous) |
| Connection Type | Feed-Thru (Line & Load Side Lug Terminals) |
| Phase | 3-Phase |
| Condition | New |
| SKU | KAL36250-N |
What Is a Thermal Magnetic Molded Case Circuit Breaker?
A thermal magnetic molded case circuit breaker (MCCB) combines two protection mechanisms in one device:
- Thermal protection (Long-Time / LI function): Responds to sustained overloads by heating a bimetal strip until it trips the breaker — protecting wiring and equipment from heat damage over time.
- Magnetic protection (Instantaneous function): Detects sudden, high-level short-circuit currents and trips the breaker immediately — preventing arc flash, fire, and catastrophic equipment damage.
The combination makes the KAL36250 ideal for both overload and short-circuit protection in industrial environments.
What Is a Feed-Thru Circuit Breaker?
A feed-thru circuit breaker includes lug terminals on both the line and load sides, allowing conductors to pass through rather than terminate only at one end. This design is commonly used in switchboards, distribution panels, and multi-section lineups where power needs to continue downstream without additional bus connections.
Common Applications
- Commercial and industrial power distribution panels
- Switchboards and switchgear lineups
- Motor control centers (MCC)
- Manufacturing plant electrical systems
- HVAC and mechanical room distribution
- Data centers and critical infrastructure panels
Why Choose Alpha Brokers & Controls?
- ✅ Genuine OEM product — authentic Square D / Schneider Electric
- ✅ In stock and ready to ship — minimize downtime fast
- ✅ Expert support — our team knows electrical equipment
- ✅ Competitive pricing on hard-to-find industrial breakers
Frequently Asked Questions
What is the KAL36250 used for?
The Square D KAL36250 is used for overcurrent and short-circuit protection in 3-phase, 600V AC electrical systems rated up to 250 amps. It is commonly installed in industrial switchboards, distribution panels, and motor control centers.
What is the interrupting rating of the KAL36250?
The KAL36250 has an interrupting capacity of 42 kAIC at 240V, 25 kAIC at 480V, and 22 kAIC at 600V AC, making it suitable for high-fault-current industrial environments.
What does "Feed-Thru" mean on the KAL36250?
Feed-Thru means the breaker has lug terminals on both the line and load sides, allowing conductors to connect through the device for downstream distribution without additional bus bars.
Is the KAL36250 the same as the PowerPact JGL36250?
The KAL36250 has been discontinued by Square D / Schneider Electric. The modern cross-reference is the PowerPacT JGL36250. Contact us to confirm compatibility for your application.
What trip functions does the KAL36250 include?
It includes LI trip functions — Long-Time (thermal overload) and Instantaneous (magnetic short-circuit) protection — providing dual-layer defense for your electrical system.