Siemens Industrial Controls 3RH1921-1DA11 Switch 326058-758 This is a fixed bore

This is a fixed bore sheave and does not require a separate bushing

The assembly features a clockwise (CW) rotation and a precision-machined 1/2-inch bore

allowing for rapid field servicing

for proper HVAC part compatibility and efficiency

Siemens Industrial Controls 3RH1921-1DA11 Switch 326058-758 This is a fixed boreOptimize your control circuitry with the Siemens Sirius 3RH1921 1DA11, a precision engineered auxiliary switch block designed for secondary switching and status feedback. This first lateral mount unit features a compact 10mm width and provides 1 NO (Normally Open) and 1 NC (Normally Closed) contact configuration. Engineered for industrial reliability, it integrates seamlessly with Sirius 3RT1 contactors and 3RH1 contactor relays from sizes S0 through