RS Better World

Siemens Size S0, 3RT2 Contactor, 24V ac Coil, 3-Pole, 38 A, 18.5 kW 24V ac, 1 NO/1 NC, 400V ac

RS stock no.:: 213-0505
Mfr. Part No.:: 3RT2028-1AC20
Manufacturer:: Siemens

Siemens Size S0, 3RT2 Contactor, 24V ac Coil, 3-Pole, 38 A, 18.5 kW 24V ac, 1 NO/1 NC, 400V ac

Subtotal (1 unit)*

R 2 950,93

(exc. VAT)

R 3 393,57

(inc. VAT)

FREE delivery for orders over R 1,500.00

In Stock

Plus 8 unit(s) shipping from 12 October 2026

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Units	Per unit
1 +	R 2,950.93

*price indicative

Our Better World range features products that make it easy for you to make a greener product choice you can trust.

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RS stock no.:: 213-0505
Mfr. Part No.:: 3RT2028-1AC20
Manufacturer:: Siemens

Specification

Technical data sheets

Legislation and Compliance

Product Details

Find similar products by selecting one or more attributes.

Select all	Attribute	Value
	Brand	Siemens
	Product Type	Contactor
	Coil Voltage	24V ac
	Number of Poles	3
	Contact Voltage	400V ac
	Contact Current	38A
	Power Rating	18.5kW
	Series	Size S0, 3RT2
	Mount Type	DIN Rail
	Function	Motor Control
	Normal State Configuration	1 NO/1 NC
	Number of Auxiliary Contacts	2
	Auxiliary Contact Configuration	1 NO/1 NC
	Terminal Type	Screw Clamp
	Control Circuit Voltage Uc	24V ac
	Minimum Operating Temperature	-25°C
	Maximum Operating Temperature	60°C
	Length	85mm
	Width	45mm
	Standards/Approvals	No
	Depth	97mm
	Better World Product	Yes
	Better World Claim	Low Carbon Manufacture

	Select all
	Brand Siemens
	Product Type Contactor
	Coil Voltage 24V ac
	Number of Poles 3
	Contact Voltage 400V ac
	Contact Current 38A
	Power Rating 18.5kW
	Series Size S0, 3RT2
	Mount Type DIN Rail
	Function Motor Control
	Normal State Configuration 1 NO/1 NC
	Number of Auxiliary Contacts 2
	Auxiliary Contact Configuration 1 NO/1 NC
	Terminal Type Screw Clamp
	Control Circuit Voltage Uc 24V ac
	Minimum Operating Temperature -25°C
	Maximum Operating Temperature 60°C
	Length 85mm
	Width 45mm
	Standards/Approvals No
	Depth 97mm
	Better World Product Yes
	Better World Claim Low Carbon Manufacture

COO (Country of Origin):: DE

Siemens size S0, 3RT2 Series Contactor, 24V AC Coil Voltage, 38A Current Rating - 3RT2028-1AC20

This contactor is a crucial component in automation and control systems, designed to manage high power applications efficiently. Operating at a coil voltage of 24V AC, it supports a load current of 38A and features a compact size S0 form factor with dimensions of 85mm x 45mm x 97mm. This product is built for reliable performance in various environments.

Features & Benefits

• Capable of handling 3-pole configurations for versatile use

• Designed for DIN rail mounting, ensuring easy installation

• Equipped with 2 auxiliary contacts for enhanced functionality

• Operates efficiently within a wide temperature range of -25°C to +60°C

• Supports an impressive power rating of 18.5kW at 400V AC

Applications

• Suitable for controlling motors in industrial automation

• Ideal for use in heating and lighting systems

• Utilised in conveyor systems to enhance operational efficiency

• Used in machinery requiring high power switching

• Effective in demanding precise control solutions

How does the contactor enhance the reliability of electrical circuits?

The robust design ensures a mechanical service life of up to 10 million operations, significantly reducing downtime.

What auxiliary features does this product offer that benefit installation?

It includes screw-type terminals for main and auxiliary circuits, allowing for straightforward and secure electrical connections.

How does the operating temperature range affect performance in different environments?

With a wide temperature tolerance, it reliably functions even in challenging conditions, making it suitable for varied industrial applications.