Square D Circuit Breaker Bases & Accessories
Square D circuit breaker accessories are designed for high performance and reliability. They provide extended features to compatible molded-case and miniature circuit breakers. Square D circuit breaker accessories are used in power system infrastructure and distribution. By adding specific functionality, such as shunt-trip or auxiliary switching, they are intended to provide remote shutdown, control, or status indication. They typically find use in utilities, industrial plants, transport, automation and switchgear, safety switchboards, MCCs, panelboards, and power and distribution switchboards.
Available accessories from Square D include factory- or field-installable circuit breaker alarm contacts, auxiliary contacts, operating handles, bell alarms, shunt-trip and undervoltage releases for Square D circuit breakers. They provide on/off indication, remote operation, better safety, lockout/tagout features, and diagnostics capability to power distribution systems using Square D breakers. Accessories are UL listed, made from specialty materials, and engineered for reliability and a long service life. They are designed to be compatible with and mount onto specific Square D breaker families.
FAQs
What are Square D circuit breaker accessories used for?
Square D circuit breaker accessories are used to add functionality such as remote shutdown, status indication, alarm signaling, and safer enclosure operation, transforming a standard breaker into a more capable protection and control device.
What types of accessories does Square D offer?
Square D offers auxiliary contacts, alarm contacts, shunt-trip devices, undervoltage releases, and rotary or door-mounted handles that enhance monitoring, safety, and remote operation capabilities.
What does a shunt-trip accessory do?
A shunt-trip accessory trips the breaker remotely when an external signal is applied, making it essential for emergency shutdown, fire-alarm integration, and automated safety systems.
Why are auxiliary and alarm contacts important?
Auxiliary and alarm contacts provide electrical feedback on breaker status—including whether it is on, off, or tripped—allowing PLCs, control systems, and monitoring devices to react quickly to electrical events.
When should I use a rotary or door-mounted handle?
Rotary and door-mounted handles are used when a breaker is installed inside a panel and needs to be operated safely from outside the enclosure, supporting lockout/tagout procedures and preventing unnecessary exposure to energized components.
Why Buy Square D Circuit Breaker Accessories from RSP Supply
RSP Supply offers genuine Square D circuit breaker accessories engineered for compatibility, safety, and long-term reliability. Our selection supports enhanced monitoring, control, and protection in industrial power distribution applications.