3RW4037-1BB04

The SIRIUS 3RW40 series S2 frame soft starter has a rated current of 63A and is compatible with 30kW/400V three-phase motors. It features screw terminal wiring, 24V AC/DC control power supply, and the standard model does not include a thermal resistor input. It offers advantages in both specifications and price.

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Siemens 3RW4037-1BB04 Soft Starter Standard Model Appearance Image

Product Positioning

The 3RW4037-1BB04 is the most basic S2 frame soft starter combination in the SIRIUS 3RW40 series, with a rated current of 63A, corresponding to a 30kW/400V three-phase motor, suitable for most general factory site needs.

Core Product Advantages and Features

Standard basic model

The entry-level standard consists of screw terminals and a 24V control power supply, and it is the most widely used in procurement and spare parts.

Corresponding to a 30kW motor

The rated current of 63A can directly meet the operating requirements of a 30kW three-phase asynchronous motor under 400V.

Built-in bypass connection

After running at full speed, it automatically switches to bypass conduction to reduce heat generation and energy loss.

Adjustable current limit

The current limiting setting is adjusted according to the on-site motor and power grid conditions to balance protection and starting efficiency.

project	Specification
Product Series	SIRIUS 3RW40 Simplified Soft Starter
Base size	S2
Rated operating current Ie	63 A
Corresponding motor power (400V)	30 kW
Corresponding motor power (230V)	18.5 kW
Rated operating voltage Ue	200...480 V AC
Control power supply voltage	24 V AC/DC
Terminal block type	Screw terminals
Motor protection methods	Standard type (excluding thermal resistor input)
Control method	Two-phase control, third phase direct connection
Break away from level	Class 10
Applicable ambient temperature	-25°C to +60°C (reduction in usage is required above 40°C)
Applicable occasions	Soft starter for three-phase asynchronous motors such as pumps, fans, and conveyor belts

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3RW4037-1BB05

SIRIUS 3RW40 Series S2 Base Soft Starter, rated current 63A, rated operating voltage extended to 400...600V AC, 24V AC/DC control power supply with screw terminals, standard type without thermal resistor input design.

3RW4036-1TB05

SIRIUS 3RW40 Series S2 Base Soft Starter, rated operating voltage increased to 400...600V AC, built-in thermal resistor (PTC) input to monitor motor temperature rise, screw terminal wiring, 24V AC/DC control power supply.

3RW4036-1TB04

The SIRIUS 3RW40 series S2 base unit soft starter has a rated operating voltage of 200...480V AC, a built-in thermal resistor (PTC) input, screw terminal wiring, and a 24V AC/DC control power supply. It is the basic combination of the thermal resistor protection model.