Circuit Breaker Accessories

Siemens circuit breakers, with standard interrupting capacities, are designed to protect the sensitive components from excessive current flows causing overloads or short circuits. These devices feature feed-thru configuration which easily mounts into all kinds of panelboards and switchboards and are calibrated at an ambient temperature of 40 degrees C. They feature a thermal magnetic trip unit which delivers both long-time and instantaneous current limiting functions and are available in 500A, 600A and 800A current ratings on Raptor Supplies.

Siemens JD Series circuit breaker trip units are designed to interrupt circuits exceeding the ambient operating temperature. These devices feature a non-interchangeable, thermal-magnetic trip mechanism offering both instantaneous and time-delayed current limiting functions. They are suitable for use with JD, HJD, HJXD, HHJD, HHJXD Series molded case circuit breakers and are available in amperage ratings of 200A, 225A, 250A and 400A on Raptor Supplies.

Siemens MD Series circuit breaker trip units are designed for protecting electrical appliances and are used in conjunction with branch circuit protection while connected with external devices. These Sentron Series trip units feature a thermal-magnetic, non-interchangeable trip overriding mild overloads while instantly reacting to severe current spikes for maximum current limiting protection. They are suitable for use with Siemens MD & HMD molded case circuit breakers for maximum efficiency. These trip units feature a 3 pole design with MD-T type frame for added versatility and are voltage rated at 600V. MD Series trip units are available in current ratings ranging between 500A & 800A on Raptor Supplies.

Siemens ND Series interrupt the current flow and protect downstream components from severe overload and short circuit conditions. These Sentron Series trip units feature a thermal magnetic trip for providing both instantaneous and long time current limiting protection. They are suitable for use with Siemens ND & HND molded case circuit breakers for maximum efficiency. These trip units feature a 3 pole design with ND-T type frame for added versatility and are voltage rated at 600V. ND Series trip units are available in 1000A & 1200A current ratings on Raptor Supplies.

Siemens RD Series circuit breaker trip unit are designed to facilitate both low and high interrupting capacity requirements for the protection of industrial equipment. These devices are suitable for use with RD and HRD Series molded case circuit breakers and feature a thermal-magnetic trip unit providing long-time and instantaneous current limiting functions against overloads or short-circuit conditions. Choose from a wide range of these trip units available in 1600, 1800 and 2000A current ratings on Raptor Supplies.

Siemens LD Series trip units are designed to facilitate both low and high interrupting capacity requirements for the protection of industrial equipment. These devices are suitable for use with JD, HJD, HJXD, HHJD, HHJXD Series molded case circuit breakers and feature a thermal magnetic trip unit providing long-time and instantaneous current limiting functions. Choose from a wide range of these circuit breaker trip units available in amperage ratings of 450A, 500A and 600A on Raptor Supplies.