Siemens Industrial Controls 3RW4027-1BB14 Starter 318518-761 the D-3153 actuators this kit

the D-3153 actuators this kit services are UL component recognized for use on 555/555S smoke and combination fire/smoke dampers

They are technically identical in voltage

24V SPST-N/O fan relay designed for precise induction motor control and pilot duty applications in HVACR systems

For technicians troubleshooting intermittent failures or total system lockout

Designed for immediate field application

Siemens Industrial Controls 3RW4027-1BB14 Starter 318518-761 the D-3153 actuators this kitIn the field, reliability and precise control are non negotiable for three phase asynchronous motors. The Siemens 3RW4027 1BB14 SIRIUS Soft Starter is a solid state starter engineered for basic performance in demanding HVACR and industrial environments. This SIRIUS 3RW40 soft starter provides a compact, 45mm width (S0 frame) solution for soft starting and stopping, effectively eliminating current spikes and mechanical stress common in across the line