The Siemens 3TE74942AR0 is a 3-phase automatic star-delta motor starter / power relay assembly from the Siemens 3TE series, designed for industrial motor control applications.
It is used for starting and protecting high-power 3-phase induction motors (up to 40 HP / 30 kW) by reducing starting current through star-to-delta transition control.
This unit is commonly installed in MCC panels, pump control systems, compressors, conveyors, and heavy-duty industrial machinery where smooth motor starting and overload protection are required.
Although it is sometimes called a “power relay”, the 3TE74942AR0 is NOT a simple relay.
✔ It is a star-delta automatic starter system (motor starter assembly)
✔ Designed for heavy motor switching, not low-power control signals
• Siemens 3TE series motor starter
• Model: 3TE74942AR0
• Automatic Star-Delta starting system
• Suitable for 40 HP (30 kW) 3-phase motors
• Current range: 20–32A (typical configuration)
• Reduces starting current and mechanical stress
• Built-in switching sequence control (star → delta)
• Industrial-grade heavy-duty construction
• Screw terminal connection
• High reliability under continuous operation
• Suitable for MCC and industrial automation systems
• Designed for harsh industrial environments
• Long service life and low maintenance
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Series | 3TE |
| Part Number | 3TE74942AR0 |
| Product Type | Star-Delta Motor Starter (Power Relay Assembly) |
| Motor Rating | 40 HP / 30 kW |
| Voltage | 415V AC (3-phase) |
| Current Range | 20–32A |
| Function | Motor starting & protection |
| Type | Automatic Star-Delta Starter |
| Application | Industrial motor control |
| Mounting Type | Panel mounting |
| Brand | Siemens |
No reviews yet.