The Siemens 3RW4447-6BC45 is a SIRIUS 3RW44 soft starter for controlled starting and stopping of three-phase asynchronous motors.
The unit operates with a main circuit voltage of 400 to 600 VAC. At 500 V and 40 degC, the standard circuit rating is 432 A and 315 kW.
For inside-delta applications, the same unit supports 748 A and 500 kW at 500 V and 40 degC.
The 3RW4447-6BC45 uses a 230 VAC control supply and screw-type auxiliary and control terminals. Its main current circuit uses busbar connections.
The soft starter includes an integrated bypass contact system, motor overload protection, intrinsic device protection, thermistor motor protection evaluation, adjustable current limitation, and external reset capability.
This catalog number has been phased out by Siemens. The preferred successor is 3RW5547-6HA16.
SIRIUS 3RW44 soft starter
400 to 600 VAC operating voltage
432 A rated operational current at 40 degC
315 kW motor rating at 500 V in standard circuit
748 A inside-delta current at 40 degC
500 kW motor rating at 500 V in inside-delta circuit
230 VAC control supply
Integrated bypass contact system
Adjustable current limitation
Motor overload protection
Intrinsic device protection
Thermistor motor protection evaluation
External reset function
Inside-delta connection capability
Motor brake output
50 to 60 Hz operating frequency
Screw-type auxiliary and control terminals
Busbar main circuit connection
Large three-phase asynchronous motors
Pumps
Fans and blowers
Compressors
Conveyors
Crushers and mills
Industrial process machinery
High-power motor starting systems
Replacement of existing SIRIUS 3RW44 soft starters
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Catalog Number | 3RW4447-6BC45 |
| Product Family | SIRIUS 3RW44 |
| Product Type | Soft Starter |
| Product Status | Phased-out |
| Preferred Successor | 3RW5547-6HA16 |
| Integrated Bypass | Yes |
| Thyristors | Yes |
| Inside-Delta Operation | Supported |
| Pollution Degree | 3 according to IEC 60947-4-2 |
| Parameter | Specification |
|---|---|
| Operating Voltage | 400 to 600 VAC |
| Voltage Tolerance | -15% / +10% |
| Operating Frequency | 50 to 60 Hz |
| Frequency Tolerance | +/-10% |
| Operational Current at 40 degC | 432 A |
| Operational Current at 50 degC | 385 A |
| Operational Current at 60 degC | 335 A |
| Inside-Delta Current at 40 degC | 748 A |
| Inside-Delta Current at 50 degC | 667 A |
| Inside-Delta Current at 60 degC | 580 A |
| Minimum Load | 8% |
| Minimum Adjustable Motor Current | 86 A |
| Continuous Operation at 40 degC | 115% of Ie |
| Typical Power Loss at 40 degC | 232 W |
| Supply / Circuit | Motor Rating |
|---|---|
| 400 V, Standard Circuit | 250 kW |
| 400 V, Inside-Delta | 400 kW |
| 500 V, Standard Circuit | 315 kW |
| 500 V, Inside-Delta | 500 kW |
| 460/480 V, Standard Circuit at 50 degC | 300 hp |
| 460/480 V, Inside-Delta at 50 degC | 600 hp |
| 575/600 V, Standard Circuit at 50 degC | 400 hp |
| 575/600 V, Inside-Delta at 50 degC | 750 hp |
| Parameter | Specification |
|---|---|
| Control Supply Type | AC |
| Control Supply Voltage | 230 VAC |
| Control Supply Frequency | 50 / 60 Hz |
| Voltage Tolerance | -15% / +10% |
| Fault Indication | Display |
| Function | Availability |
|---|---|
| Motor Overload Protection | Yes |
| Intrinsic Device Protection | Yes |
| Thermistor Motor Protection Evaluation | Yes |
| Adjustable Current Limitation | Yes |
| External Reset | Yes |
| Integrated Bypass Contact System | Yes |
| Connection | Type |
|---|---|
| Main Current Circuit | Busbar connection |
| Auxiliary / Control Circuit | Screw terminals |
| Auxiliary NO Contacts | 3 |
| Auxiliary CO Contacts | 1 |
| Auxiliary NC Contacts | 0 |
| Parameter | Specification |
|---|---|
| Width | 210 mm |
| Height | 230 mm |
| Depth | 298 mm |
| Mounting | Screw fixing |
| Maximum Motor Cable Length | 500 m |
| Direction | Minimum Clearance |
|---|---|
| Above | 100 mm |
| Side | 5 mm |
| Below | 75 mm |
| Parameter | Specification |
|---|---|
| Maximum Installation Altitude | 5000 m |
| Maximum Operating Temperature | 60 degC |
| Storage Temperature | -25 to +80 degC |
| Derating Temperature | 40 degC |
| Front Protection | IP00 |
| With Terminal Cover | IP20 |
Verify the complete catalog number before replacing an installed soft starter.
Confirm the motor current and motor power against the selected circuit configuration.
Distinguish between standard and inside-delta ratings during sizing.
Confirm the 400 to 600 VAC main supply range before energizing the unit.
Verify the 230 VAC control supply and control-circuit wiring.
Maintain the specified ventilation clearances around the soft starter.
Configure motor overload protection and current limitation for the connected motor.
Verify start, stop, bypass, and protection functions before normal operation.
3RW4447-6BC45 is a phased-out SIRIUS 3RW44 product.
Siemens identifies 3RW5547-6HA16 as the preferred successor.
Do not select the successor solely by current rating.
Verify motor circuit, supply voltage, control voltage, wiring, protection settings, and application behavior before migration.
Global Express Shipping
Returns & Warranty
Manufacturer: Siemens
Product No.: 3RW4447-6BC45
Country of origin:Czechia
Product Type: Soft starters
Payment: T/T, Western Union
Weight: 12575g
Dimensions: 210 x 230 x 298 mm (W x H x D)
Shipping port: Xiamen
Warranty: 12 months
The Siemens 3RW4447-6BC45 is a SIRIUS 3RW44 soft starter for controlled starting and stopping of three-phase asynchronous motors.
The unit operates with a main circuit voltage of 400 to 600 VAC. At 500 V and 40 degC, the standard circuit rating is 432 A and 315 kW.
For inside-delta applications, the same unit supports 748 A and 500 kW at 500 V and 40 degC.
The 3RW4447-6BC45 uses a 230 VAC control supply and screw-type auxiliary and control terminals. Its main current circuit uses busbar connections.
The soft starter includes an integrated bypass contact system, motor overload protection, intrinsic device protection, thermistor motor protection evaluation, adjustable current limitation, and external reset capability.
This catalog number has been phased out by Siemens. The preferred successor is 3RW5547-6HA16.
SIRIUS 3RW44 soft starter
400 to 600 VAC operating voltage
432 A rated operational current at 40 degC
315 kW motor rating at 500 V in standard circuit
748 A inside-delta current at 40 degC
500 kW motor rating at 500 V in inside-delta circuit
230 VAC control supply
Integrated bypass contact system
Adjustable current limitation
Motor overload protection
Intrinsic device protection
Thermistor motor protection evaluation
External reset function
Inside-delta connection capability
Motor brake output
50 to 60 Hz operating frequency
Screw-type auxiliary and control terminals
Busbar main circuit connection
Large three-phase asynchronous motors
Pumps
Fans and blowers
Compressors
Conveyors
Crushers and mills
Industrial process machinery
High-power motor starting systems
Replacement of existing SIRIUS 3RW44 soft starters
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Catalog Number | 3RW4447-6BC45 |
| Product Family | SIRIUS 3RW44 |
| Product Type | Soft Starter |
| Product Status | Phased-out |
| Preferred Successor | 3RW5547-6HA16 |
| Integrated Bypass | Yes |
| Thyristors | Yes |
| Inside-Delta Operation | Supported |
| Pollution Degree | 3 according to IEC 60947-4-2 |
| Parameter | Specification |
|---|---|
| Operating Voltage | 400 to 600 VAC |
| Voltage Tolerance | -15% / +10% |
| Operating Frequency | 50 to 60 Hz |
| Frequency Tolerance | +/-10% |
| Operational Current at 40 degC | 432 A |
| Operational Current at 50 degC | 385 A |
| Operational Current at 60 degC | 335 A |
| Inside-Delta Current at 40 degC | 748 A |
| Inside-Delta Current at 50 degC | 667 A |
| Inside-Delta Current at 60 degC | 580 A |
| Minimum Load | 8% |
| Minimum Adjustable Motor Current | 86 A |
| Continuous Operation at 40 degC | 115% of Ie |
| Typical Power Loss at 40 degC | 232 W |
| Supply / Circuit | Motor Rating |
|---|---|
| 400 V, Standard Circuit | 250 kW |
| 400 V, Inside-Delta | 400 kW |
| 500 V, Standard Circuit | 315 kW |
| 500 V, Inside-Delta | 500 kW |
| 460/480 V, Standard Circuit at 50 degC | 300 hp |
| 460/480 V, Inside-Delta at 50 degC | 600 hp |
| 575/600 V, Standard Circuit at 50 degC | 400 hp |
| 575/600 V, Inside-Delta at 50 degC | 750 hp |
| Parameter | Specification |
|---|---|
| Control Supply Type | AC |
| Control Supply Voltage | 230 VAC |
| Control Supply Frequency | 50 / 60 Hz |
| Voltage Tolerance | -15% / +10% |
| Fault Indication | Display |
| Function | Availability |
|---|---|
| Motor Overload Protection | Yes |
| Intrinsic Device Protection | Yes |
| Thermistor Motor Protection Evaluation | Yes |
| Adjustable Current Limitation | Yes |
| External Reset | Yes |
| Integrated Bypass Contact System | Yes |
| Connection | Type |
|---|---|
| Main Current Circuit | Busbar connection |
| Auxiliary / Control Circuit | Screw terminals |
| Auxiliary NO Contacts | 3 |
| Auxiliary CO Contacts | 1 |
| Auxiliary NC Contacts | 0 |
| Parameter | Specification |
|---|---|
| Width | 210 mm |
| Height | 230 mm |
| Depth | 298 mm |
| Mounting | Screw fixing |
| Maximum Motor Cable Length | 500 m |
| Direction | Minimum Clearance |
|---|---|
| Above | 100 mm |
| Side | 5 mm |
| Below | 75 mm |
| Parameter | Specification |
|---|---|
| Maximum Installation Altitude | 5000 m |
| Maximum Operating Temperature | 60 degC |
| Storage Temperature | -25 to +80 degC |
| Derating Temperature | 40 degC |
| Front Protection | IP00 |
| With Terminal Cover | IP20 |
Verify the complete catalog number before replacing an installed soft starter.
Confirm the motor current and motor power against the selected circuit configuration.
Distinguish between standard and inside-delta ratings during sizing.
Confirm the 400 to 600 VAC main supply range before energizing the unit.
Verify the 230 VAC control supply and control-circuit wiring.
Maintain the specified ventilation clearances around the soft starter.
Configure motor overload protection and current limitation for the connected motor.
Verify start, stop, bypass, and protection functions before normal operation.
3RW4447-6BC45 is a phased-out SIRIUS 3RW44 product.
Siemens identifies 3RW5547-6HA16 as the preferred successor.
Do not select the successor solely by current rating.
Verify motor circuit, supply voltage, control voltage, wiring, protection settings, and application behavior before migration.
Global Express Shipping
Returns & Warranty
Orders are processed and delivered Monday-Friday (excluding public holidays).
For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .
| Country of origin |
Czechia
|
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