Siemens offers a wide range of internal product accessories to complement and enhance the performance of their various products. Here are some examples of Siemens internal product accessories: Auxiliary contacts: Siemens provides auxiliary contacts for their circuit breakers, motor starters, and other control devices. These contacts are used to provide remote indication of the device's status or to control other devices. Shunt trips: Siemens offers shunt trips for their circuit breakers, which allow remote tripping of the breaker in the event of an emergency or fault condition. Undervoltage releases: Siemens provides undervoltage releases for their circuit breakers and motor starters. These releases automatically trip the device in the event of a low voltage condition.