3RW4037-1TB04

The SIRIUS 3RW40 series S2 frame soft starter has a rated current of 63A, is compatible with 30kW/400V three-phase motors, features screw terminal wiring and supports thermal resistor (PTC) input, a 24V AC/DC control power supply, and can monitor motor temperature rise.

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Siemens 3RW4037-1TB04 soft starter screw terminal thermal resistance type appearance diagram

Product Positioning

The 3RW4037-1TB04 is a SIRIUS 3RW40 series S2 frame soft starter with a rated current of 63A. It also has a thermal resistor input function, but uses traditional screw terminals, which is convenient for using existing wiring methods.

Core Product Advantages and Features

Screw terminal wiring

Continuing with traditional wiring practices, installation personnel can get started without needing to learn how to use crimping tools.

Thermal resistor input protection

It receives the PTC signal built into the motor and trips in advance when the temperature is abnormal to avoid the windings burning out.

Same specifications as the spring terminal model

The rated current, power, and voltage range are the same as those of 2TB04, only the terminal type is different, which facilitates the interchangeability of spare parts.

Suitable for device modification and upgrade

When using the existing screw terminal wiring panel, the old soft starter can be directly replaced.

project	Specification
Product Series	SIRIUS 3RW40 Simplified Soft Starter
Base size	S2
Rated operating current Ie	63 A
Corresponding motor power (400V)	30 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	Thermal resistor (PTC) 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	Equipment such as pumps, fans, and compressors that require monitoring of motor winding temperature

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3RW4037-2TB04

SIRIUS 3RW40 series S2 frame soft starter, rated current 63A, corresponding to 30kW/400V (18.5kW/230V) three-phase motor, spring terminal wiring with built-in thermal resistor input, 24V AC/DC control power supply, IP20 protection rating.

3RW4037-1BB15

SIRIUS 3RW40 Series S2 Base Soft Starter, rated current 63A, rated operating voltage up to 400...600V AC, screw terminal wiring, 110...230V AC/DC control power supply, standard model without thermal resistor input.

3RW4037-1BB14

The SIRIUS 3RW40 series S2 base-mount soft starter has a rated current of 63A and an operating voltage of 200...480V AC. It is available with screw terminals and is compatible with 110...230V AC/DC control power supplies, making it suitable for applications requiring higher voltage in field control boxes.