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Circuit Breaker
Square D | MJP36400YP | Circuit Breaker | 400A | 3-Pole | 600V
★★★★★
| Part Number | MJP36400YP |
| Amperes | 400 |
| Poles | 3 |
| Voltage | 600 |
| Product Type | Circuit Breaker |
Regular price
$2,010.00
Sale price
$2,010.00
Regular price
Unit price
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Seamless online shopping experience guaranteed with easy shipping and returns policy.
Shop with Confidence: Our Products come with a Reliable Year-Long Warranty.
Square D | MJP36400YP | Circuit Breaker | 400A | 3-Pole | 600V
Regular price
$2,010.00
Sale price
$2,010.00
Regular price
Unit price
Product description
Shipping
The Square D MJP36400YP Circuit Breaker is a precise, field-ready protection device designed for demanding electrical installations. With a 400A rating, a 3-pole configuration, and a 600V maximum, this part provides reliable overcurrent protection and dependable performance in retrofit, maintenance, and replacement projects. When you need to match exact specifications for existing panels, the MJP36400YP ensures compatibility without guesswork.
Key specifications
- Amperage: 400A
- Poles: 3-Pole
- Voltage: 600V
- Part number: MJP36400YP
- Type: Circuit Breaker (Square D)
Why this model stands out
Designed to align with the original equipment specifications, the MJP36400YP offers a reliable replacement path when panel labels and service manuals point to a 400A, 3-pole, 600V device. The part number itself serves as the strongest compatibility reference, reducing uncertainty during procurement and installation. This is not a generic substitute—it’s a true match for systems configured around the Square D MJP series intent and footprint.
Ideal use cases
- Maintenance of existing electrical panels requiring a precise 400A, 3-pole, 600V protection device
- Retrofits where original specifications must be preserved to maintain panel performance and trip characteristics
- Replacement of a failed breaker in commercial or light-industrial distribution boards that rely on this exact configuration
Compatibility and installation notes
Before ordering, confirm fit and ratings to ensure seamless integration. The part number MJP36400YP is the best reference for compatibility with your panel. Verify that the panel’s labeling supports a 600V maximum and that the circuit breaker’s 3-pole arrangement matches your bus configuration. If you’re unsure, consult your panel documentation or a licensed electrician to avoid mismatches.
Practical tips for a smooth replacement
- Keep the original packaging until you’re ready to install to protect the component from damage
- Document the part number and installation date for future service parts planning
- Power down the equipment and follow proper lockout/tagout procedures before replacing the breaker
- Handle the breaker with care to preserve its connectors and mounting provisions for a secure fit
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What Our Customers Say
General feedback we often hear from customers purchasing industrial electrical parts.
Verified
Lead time was reasonable and the part matched expectations when it arrived.
Procurement · Ontario
Verified
Good value for industrial use. Customers mention easy installation.
Service tech · Field work
