Features:
- Switches a three-phase motor circuit through three AC-3 main poles.
- Uses a 220 V 50 Hz or 264 V 60 Hz conventional AC operating coil.
- Provides two normally open and two normally closed auxiliary contacts for control logic.
Match 3TF4522-0XM0 by complete order number, coil data, pole arrangement, and auxiliary-contact allocation before replacing a similar 3TF contactor.
Transfer main, coil, and auxiliary wiring by terminal designation and retain the overload relay or branch protection specified for the motor circuit.
Commission the coil command, mechanical pickup, contact continuity, and overload trip path as separate checks.
The Siemens 3TF4522-0XM0 3TF45 AC-3 Power Contactor may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Siemens 3TF4522-0XM0 3TF45 AC-3 Power Contactor Manuals,Datasheets,Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Tracing motor power through the three contact poles
- Line side: The three incoming phases land on the line terminals.
- Load side: The matching load terminals continue to the motor branch.
- Coil action: Energizing the coil closes all three main poles together.
- AC-3 duty: The 38 A rating applies to the documented motor-switching category.
Choosing control voltage by both frequency and value
- 50 Hz supply: The coil uses 220 V AC on a 50 Hz control circuit.
- 60 Hz supply: The same coil marking permits 264 V AC at 60 Hz.
- Undervoltage: Low control voltage can prevent full armature closure.
- Overvoltage: Incorrect control voltage can overheat the coil.
Using the 2NO+2NC contacts for feedback and interlocking
- NO feedback: A normally open contact closes when the contactor operates.
- NC interlock: A normally closed contact opens as the main poles close.
- State relationship: Auxiliary motion follows the same contactor mechanism.
- Separate duty: Control contacts do not carry the three-phase motor current.
Combining switching with separate protective devices
- Overload relay: The overload device monitors sustained motor overcurrent.
- Short-circuit device: A fuse or breaker interrupts high fault current.
- Contactor role: The 3TF unit performs commanded switching.
- Selection check: Motor rating and protective coordination are verified as one starter branch.