The Siemens 3TF33000BB4 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 starters, pump control systems, compressors, HVAC systems, and industrial automation systems, where reliable motor switching with DC-operated control supply is required.
This model belongs to the 3TF33 Size 1 class (~22A AC-3 duty rating), suitable for motor loads up to approximately 11 kW at 415V AC.
From Siemens 3TF33 coil coding:
✔ So BB4 is correctly classified as DC coil operated contactor
• Siemens 3TF SICOP series
• Model: 3TF33000BB4
• 3-pole contactor design
• DC coil operated (BB4 family – DC control supply variant)
• Rated for 22A AC-3 motor duty
• Suitable for 3-phase motor switching
• Size 1 industrial contactor
• High electrical and mechanical life
• Screw terminal connection system
• Reliable arc quenching system
• 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 | 3TF33000BB4 |
| Product Type | Power Contactor |
| Poles | 3 Pole |
| Coil Type | DC Coil (BB4 variant) |
| Rated Current | 22A (AC-3 duty) |
| Rated Power | ~11 kW at 415V AC |
| Utilization Category | AC-3 (motor control) |
| Frame Size | Size 1 |
| Mounting Type | Panel / DIN rail mounting |
| Terminal Type | Screw terminals |
| Application | Motor control, power switching |
| Brand | Siemens |
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