Square D KAL36225 | 225A 3-Pole 600V Molded Case Circuit Breaker (Feed-Thru)

Square D KAL36225 – 225 Amp, 3-Pole, 600V Thermal Magnetic Molded Case Circuit Breaker

The Square D KAL36225 is a heavy-duty, thermal magnetic molded case circuit breaker (MCCB) engineered for reliable protection in commercial and industrial power distribution systems. Part of Square D's trusted KAL Series (K-Frame), this breaker delivers consistent, code-compliant protection for 3-phase electrical systems operating at up to 600V AC.

Whether you're replacing a failed breaker in an existing switchboard or sourcing for a new panel build, the KAL36225 is a proven, widely-specified component trusted by electrical contractors, maintenance engineers, and facility managers across the country.

Key Specifications

• Catalog Number: KAL36225
• Manufacturer: Square D (Schneider Electric)
• Series / Frame: KAL Series | K-Frame (250A Frame)
• Ampere Rating: 225A @ 40°C
• Voltage Rating: 600V AC / 250V DC
• Poles: 3-Pole, 3-Phase
• Trip Type: Thermal Magnetic (LI – Long-Time & Instantaneous)
• Mounting Type: Feed-Through (Feed-Thru)
• Terminal Connection: Line & Load Side Lug Terminals
• Interrupting Rating:
  • 42 kAIC @ 240V AC
  • 25 kAIC @ 480V AC
  • 22 kAIC @ 600V AC
  • 10 kAIC @ 250V DC
• Standards: UL, CSA
• Frequency: 50/60 Hz
• Dimensions: 8"H x 4.5"W x 4.75"L
• Weight: ~6 lbs

Product Features & Benefits

🔒 Thermal Magnetic Protection

The KAL36225 uses a dual-element thermal magnetic trip mechanism that provides both overload protection (long-time) and short-circuit protection (instantaneous). This LI trip configuration ensures fast, reliable response to fault conditions while avoiding nuisance tripping under normal load variations.

⚡ Feed-Through Mounting for Switchboard Flexibility

Designed with feed-thru mounting, the KAL36225 is ideal for installation in switchboards, panelboards, and distribution systems where power needs to be passed through the breaker from line to load side without interrupting the bus. Both line-side and load-side lug terminals are included for flexible, secure wiring.

🏗️ Heavy-Duty K-Frame Construction

Built on Square D's robust K-Frame platform with a 250A frame rating, this breaker is designed to handle the mechanical and thermal stresses of demanding industrial environments. The molded case housing provides durability and arc containment for long service life.

🌐 Wide Application Compatibility

Rated for 600V AC and 250V DC, the KAL36225 is compatible with a broad range of commercial and industrial power systems, including 480V three-phase distribution — the most common voltage in U.S. industrial facilities.

Common Applications

• Industrial switchboards and distribution panels
• Commercial electrical systems (office buildings, warehouses, retail)
• Manufacturing equipment and motor control centers
• HVAC system electrical protection
• Data center power distribution
• Utility and infrastructure electrical panels

Why Buy from Alpha Brokers & Controls?

• ✅ In-Stock & Ready to Ship – No lead time delays
• ✅ Verified Condition – Every unit is inspected before shipment
• ✅ Expert Support – Our team knows electrical components inside and out
• ✅ Competitive Pricing – Direct access to hard-to-find Square D inventory

Have a question about compatibility or need a replacement urgently? Contact our team today — we're here to help you get the right part, fast.

Frequently Asked Questions

What does "Feed-Thru" mean on the KAL36225?

Feed-through (Feed-Thru) mounting means the breaker allows power to pass from the line side through to the load side via both top and bottom lugs. This is commonly used in switchboards to distribute power without breaking the main bus, and it provides flexibility in panel configurations.

What is the interrupting rating of the Square D KAL36225?

The KAL36225 has an interrupting rating of 42 kAIC at 240V AC, 25 kAIC at 480V AC, and 22 kAIC at 600V AC. For DC applications, it is rated at 10 kAIC at 250V DC.

What trip functions does the KAL36225 include?

It includes LI trip functions — Long-Time (thermal overload protection) and Instantaneous (magnetic short-circuit protection). This is a standard thermal magnetic configuration suitable for most commercial and industrial branch circuit and feeder protection applications.

Is the KAL36225 compatible with Square D switchboards and panelboards?

Yes. The KAL36225 is designed for use with Square D K-Frame compatible switchboards and enclosures. It features feed-thru mounting with line and load side lug terminals for secure installation.

What is the difference between the KAL36225 and the PowerPact J-Frame (JGL36225)?

The KAL36225 is from Square D's legacy K-Frame series. Its functional modern equivalent is the Square D PowerPact J-Frame series (JGL36225), which features updated trip unit technology. If you are retrofitting existing equipment, the KAL36225 is the direct replacement for existing K-Frame installations.

What standards does the KAL36225 meet?

The KAL36225 is listed and certified to UL and CSA standards, ensuring compliance with North American electrical codes including the National Electrical Code (NEC).