Siemens B220AFH AFCI Miniature Circuit Breaker

The B220AFH is a bolt-on breaker designed for use in Siemens P1, P2, P3, P4, and P5 panelboards.

This breaker features a pigtail neutral connection. The coiled white pigtail wire must be connected directly to the panelboard neutral bus bar, while the load neutral wire connects to the breaker itself.

Yes, this breaker is fully rated for 22kAIC at 120/240VAC. It is suitable for commercial and industrial panelboards where higher fault current interrupting capabilities are required compared to standard 10kAIC residential breakers.

The breaker lugs accept 14 to 10 AWG copper (Cu) conductors or 12 to 10 AWG aluminum (Al) conductors. Ensure connections are properly torqued according to the manufacturer specifications during installation.

As an Arc Fault Circuit Interrupter (AFCI), it actively monitors the circuit for dangerous series and parallel arcing faults that standard thermal-magnetic breakers might miss, significantly reducing the risk of electrical fires.

Yes, a 2-pole AFCI breaker like the B220AFH is required for multi-wire branch circuits where two hot wires share a single neutral conductor. This ensures proper arc fault detection across both phases without nuisance tripping.

The primary difference is the interrupting rating. The B220AFC is rated for 10kAIC, whereas the B220AFH is a high-interrupting version rated for 22kAIC. Both are 20A, 2-pole AFCI bolt-on breakers.

It uses a fixed thermal-magnetic trip unit with Long-Time (L) and Instantaneous (I) functions to protect against overloads and short circuits, operating in tandem with its electronic arc fault detection capabilities.