The Eaton NSB BQ220240 Miniature Circuit Breaker is a 2-pole overcurrent protection device for 240V AC power, available in 20A and 40A ratings with 50/60 Hz operation. It belongs to Eaton's BQ NSB family and is designed to interrupt fault currents to protect conductors in low‑voltage distribution. The BQ220240 model provides two-pole protection in a compact form factor suitable for standard electrical panels requiring 240V service.
