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Siemens 3RW4038-2BB05 S2 Soft Starter - 72A, 45kW

Siemens SIRIUS S2 Soft Starter - 72A, 45kW, 400-600V AC, 24V AC/DC.

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ManufacturerSiemens

Part number3RW4038-2BB05

Type Soft Starter

Series SIRIUS 3RW40

Size S2

Rated Operational Current 72 A

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SIRIUS Soft Starter S2 Size 72A Rating 45kW Power 24V AC/DC Control Spring-type Terminals

Product description

The Siemens 3RW4038-2BB05 is a SIRIUS soft starter designed for S2 applications, rated for 72A and 45kW at 500V. It operates with a control voltage of 24V AC/DC and a power supply range of 400-600V AC, utilizing spring-type terminals for secure connections.

This soft starter is ideal for smooth motor acceleration and deceleration in various industrial settings, including pump systems, fan applications, and conveyor belts. It helps reduce mechanical stress on machinery and electrical inrush currents, extending equipment life.

Source your Siemens 3RW4038-2BB05 from Stanlo Automation, a veteran-owned distributor, for reliable surplus industrial parts. We ensure quality and availability for your automation needs.

Technical specifications

Type	Soft Starter
Series	SIRIUS 3RW40
Size	S2
Rated Operational Current	72 A
Rated Power (at 500V)	45 kW
Control Voltage	24 V AC/DC
Input Voltage	400-600 V AC
Connection Type	Spring-type terminals
Temperature Rating	40 °C

Common applications

Motor control

Pump applications

Fan control

Conveyor systems

Compressor control

General industrial automation

Compatible systems

Compatible with Siemens S7 PLCs and other control systems utilizing 24V AC/DC signals.

Also known as

Siemens S2 Soft Starter 3RW40 Soft Starter Siemens Motor Starter

Replaces / compatible with

This part is a direct replacement for other Siemens SIRIUS 3RW40 series soft starters with similar specifications. Consult Siemens documentation for precise cross-referencing.

Technical note

Expert tip

Ensure proper heat dissipation and ventilation as the 40°C rating is standard; derating may be necessary in higher ambient temperatures.

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Frequently asked questions

What is the control voltage for the Siemens 3RW4038-2BB05 soft starter?

The Siemens 3RW4038-2BB05 soft starter operates with a control voltage of 24V AC/DC. This allows for flexible integration into various control systems.