The Siemens 3TF34000BF4 is a 3-pole industrial power contactor from the Siemens 3TF SICOP series, designed for switching and controlling 3-phase AC motors and electrical loads using a DC control coil.
It is widely used in MCC panels, motor starter circuits, pump control systems, compressors, HVAC systems, and industrial automation systems, where reliable switching of medium-heavy motors with DC-operated control is required.
This model belongs to the Size S2 class (~32A AC-3 duty rating), suitable for motor loads up to approximately 15 kW at 415V AC.
From Siemens 3TF3400 series datasheets:
✔ So: BF4 = DC-operated control coil contactor (110V DC class in this family)
• Siemens 3TF SICOP series
• Model: 3TF34000BF4
• 3-pole contactor design
• DC coil operated (BF4 – 110V DC control supply family)
• Rated for 32A AC-3 motor duty
• Suitable for 3-phase motor switching
• Size S2 industrial contactor frame
• High electrical and mechanical life
• Screw terminal connection system
• Strong arc-quenching performance
• Shock and vibration resistant construction
• Compatible with thermal overload relays
• Designed for MCC and automation panels
• Auxiliary contact block compatible (add-on type)
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Series | 3TF (SICOP) |
| Part Number | 3TF34000BF4 |
| Product Type | Power Contactor |
| Poles | 3 Pole |
| Coil Type | DC Coil (BF4 – 110V DC family) |
| Rated Current | 32A (AC-3 duty) |
| Rated Power | ~15 kW at 415V AC |
| Utilization Category | AC-3 (motor control) |
| Frame Size | S2 |
| Mounting Type | Panel / DIN rail mounting |
| Terminal Type | Screw terminals |
| Application | Motor control, power switching |
| Brand | Siemens |
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