The Schneider Electric Square D SQ1S40B is a circuit breaker designed for reliable power distribution in commercial and industrial electrical systems. This unit is part of the established Square D QO series, recognized for its robust construction and dependable performance in demanding environments. It offers essential protection against overcurrents and short circuits, ensuring the safety and operational continuity of connected equipment.

Technical details

• Series: Square D QO
• Type: Miniature Circuit Breaker (MCB)
• Poles: Single Pole (indicated by 'S' in SQ1S)
• Amperage Rating: 40 Amperes (indicated by '40' in SQ1S40B)
• Voltage Rating: Suitable for 120/240VAC systems (as per existing information)
• Interrupting Rating: Typically 10,000 AIC (Amperes Initial Current) for QO series, verify with datasheet for exact specification.
• Terminal Type: Screw terminal (common for this series)
• Trip Type: Thermal-magnetic

Applications & compatibility

This circuit breaker is commonly utilized in residential, commercial, and light industrial panelboards for branch circuit protection. It is suitable for protecting lighting circuits, receptacle circuits, and small motor loads. The SQ1S40B is designed to fit within standard Square D QO load centers and complementary distribution equipment.

Available from Industrial Automation Co as new, refurbished, or surplus stock, backed by a 2-year warranty with same-day shipping on in-stock items. Request a quote for the Schneider Electric Square D SQ1S40B or contact our technical team for cross-reference assistance with compatible QO series components.