Square D | BJA160203 | Circuit Breaker | 20A | 1-Pole | 347V

Meet the Square D BJA160203 Circuit Breaker—a precisely specified, single-pole protection unit built for reliability in 347V electrical networks. With a 20A rating, this breaker safeguards a single hot leg, making it an ideal choice for maintenance, retrofit, or replacement projects where exact specifications matter and reliability is non-negotiable.

Key specifications

• Amperage: 20A
• Poles: 1-Pole
• Voltage: 347V
• Part number: BJA160203

Why this exact part matters

In electrical panels that require the Square D BJA-series, using the correct part number is the simplest path to compatible fit and proper performance. The BJA160203 is sized for a single-circuit protective interruption at 20A and 347V, ensuring you maintain the intended protection profile without sacrificing panel integrity or safety. The part number serves as the most reliable reference when confirming compatibility with your panel model and existing wiring configuration.

Who should consider this breaker

• Maintenance teams performing service on 347V panels that require a 20A, 1-pole solution.
• Retrofit projects aiming to restore original protection characteristics without altering circuit design.
• Replacement scenarios where a direct, exact-match part is preferred to minimize downtime and risk.

Use cases and practical applications

Use the Square D BJA160203 in applications where a single hot-leg circuit needs dependable overcurrent protection at 347V. It’s well-suited for commercial or industrial environments that operate within 347/600V systems, providing a straightforward swap for a failed or outdated breaker while preserving the panel’s electrical architecture.

How to verify compatibility

Before ordering, confirm fit and ratings align with your panel’s labeling and service requirements. Rely on the part number BJA160203 as the clearest compatibility reference, and ensure the panel is designed to accept a BJA-series, 1-pole, 347V device. If in doubt, cross-check the panel’s documentation or consult a qualified electrician to prevent mismatches.

Practical installation tips

• Power down the main and verify the circuit is de-energized before replacement or installation.
• Inspect the mounting and terminal connections for cleanliness and secure seating.
• Follow the panel manufacturer’s torque specifications and routing guidelines to maintain proper insulation and clearance.
• Store a spare BJA160203 in a labeled, accessible location for future service needs.