Square D | RJA36100CU31A | Circuit Breaker | 1000A | 3-Pole | 600V | Plug-In

Designed for demanding electrical installations, the Square D RJA36100CU31A circuit breaker delivers reliable protection in a compact plug-in package. This 3‑pole unit is rated for 1000 A and 600 V, making it a dependable choice for large-panel applications that require high-current interruption and robust circuit protection. Intended for maintenance, retrofit, and replacement projects, it provides a precise match for systems built around this exact specification.

Key specifications

• Amperage: 1000 A
• Poles: 3‑Pole
• Voltage: 600 V
• Type: Plug-In
• Part number: RJA36100CU31A

Why this Square D breaker stands out

What sets this unit apart is its exact plug‑in form factor paired with a high-current rating, designed to slip into compatible Square D panels without the need for adapters or modification. The RJA36100CU31A is the precise reference to trust when coordinating with existing equipment, retrofit plans, or service replacements that demand matching specs and reliable performance.

Ideal use scenarios

• Retrofit projects where an existing panel requires a like-for-like 1000 A, 3‑pole, 600 V plug‑in breaker
• Maintenance and service work to quickly restore protection without altering panel architecture
• Replacement of worn or obsolete units in industrial control panels and heavy‑duty electrical setups

Practical guidance for procurement

Before ordering, confirm that the exact part number is a match for your panel and ratings. The RJA36100CU31A is the best reference for compatibility, ensuring consistent protection characteristics and reliable operation within your system.