Busbar for 3-pole breaker, Schneider Electric A9XAH357, 100 A, 57 modules

Schneider Electric A9XAH357 busbar for 3-pole breaker is a compact conductive link designed to distribute a three-phase or three-pole supply across multiple modular circuit breakers in an enclosure. Rated for 100 A and sized to span 57 modular units, this busbar provides a space-efficient method to connect common poles of adjacent breakers while maintaining a consistent current-carrying path and mechanical alignment within standard distribution boards.

Advantages

The busbar offers a robust current rating of 100 A and a form factor that covers 57 modules, enabling neat, space-saving installations in panel assemblies. Its design simplifies wiring by eliminating the need for multiple individual conductors between breakers, reduces installation time, and helps maintain uniform electrical contact and mechanical stability across three-pole breaker arrangements.

Suitable for

• Linking three-pole circuit breakers in residential electrical distribution boards
• Compact commercial switchboards where space optimization is required
• Applications requiring simultaneous disconnection of three poles (e.g., three-phase circuits)
• Situations where reliable, repeatable connections between adjacent breakers are needed

Key specifications

• Current rating: 100 A
• Number of poles: 3-pole configuration
• Width coverage: 57 modular units (modules)
• Compatibility: designed for use with modular circuit breaker systems in standard DIN-rail distribution panels
• Function: conductive link for simultaneous connection and disconnection of three poles

How to use

Install the busbar according to the panel and breaker manufacturer's instructions: isolate power, mount the breakers on the DIN rail, and position the busbar so its contacts align with the corresponding breaker terminals. Ensure secure seating and proper mechanical engagement; tighten any required fastening elements to the specified torque and restore power only after verification. The busbar is intended for in-panel connection of adjacent three-pole breakers to create a common feed or common trip arrangement.

Usage recommendations

Verify breaker model compatibility and panel spacing before installation, confirm the system is de-energized, and follow local electrical codes and safety practices. Use the busbar only within its rated current and environment; for higher currents or non-standard installations consult technical documentation or a qualified electrician.