Siemens F3B003M 3A 3-Pole 480 V Circuit Breaker

The Siemens F3B003M 3A 3-Pole 480 V Circuit Breaker is a dependable, original Siemens replacement part designed to protect 3-phase electrical systems at 480 volts. Part Number F3B003M is your reassurance that you’re sourcing an authentic, compatible component for Siemens panels and control gear.

Designed for simultaneous phase protection, this 3-pole breaker ensures all three phases trip together in the event of an overload or fault. That coordinated disconnection helps safeguard motors, drives, and other three-phase equipment, reducing the risk of unbalanced loads and equipment damage in industrial and commercial applications. The 3 A current rating provides a precise trip threshold ideal for control circuits, automation panels, and low-load feeders where stability and predictable behavior matter.

Key features

• Current rating: 3 A
• Poles: 3 for three-phase protection
• Voltage rating: 480 V, suitable for common industrial three-phase systems
• Part Number: F3B003M, an authentic Siemens replacement
• Designed for reliable operation within compatible Siemens panels and enclosures

Ideal use cases

• Protection for 3-phase equipment in manufacturing lines, conveyors, and machine control panels
• Replacement part in upgraded or legacy Siemens distribution boards
• Small-draw control circuits and feeders where precise trip behavior is critical

Why choose the Siemens F3B003M?

Authentic Siemens engineering translates to consistent trip characteristics, robust mechanical action, and availability in standard replacement parts channels. With its 3-pole configuration and 480 V rating, it’s a practical solution for keeping three-phase systems safe without over-tripping during normal operation. This makes it a smart, long-term investment for maintaining reliability in industrial controls and commercial electrical infrastructure.

Compatibility and installation tip: verify that your panel or distribution board is designed for 3-pole devices at 480 V and that the form factor matches the F3B003M. If you’re replacing an existing unit, this part serves as a straightforward, drop-in replacement to restore intended protection quickly and with minimal downtime.