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Siemens 3RT2028-1AC20 3-Pole Power Contactor — 38A 18.5kW

Siemens 3RT2028-1AC20 3-Pole Power Contactor

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ManufacturerSiemens

Part number3RT2028-1AC20

Type Power Contactor

AC-3e/AC-3 Rating 38A, 18.5kW @ 400V

Poles 3

Coil Voltage 24V AC

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38A current rating 18.5kW power handling 24V AC coil Supports 50/60 Hz Screw terminals 1 NO + 1 NC auxiliary contacts

Product description

The Siemens 3RT2028-1AC20 is a 3-pole power contactor designed for AC-3e/AC-3 duty, rated for 38A and 18.5kW at 400V. This size S0 contactor features a 24V AC coil operating at 50/60 Hz. It is equipped with screw terminals for reliable installation and includes 1 normally open (NO) and 1 normally closed (NC) auxiliary contact for basic control circuits.

This component is widely utilized in industrial automation for motor control, switching power circuits, and in control panels for various machinery. Its standard configuration makes it a versatile choice for many applications requiring a 38A switching capacity.

Stanlo Automation, a veteran-owned distributor of surplus industrial parts, offers the Siemens 3RT2028-1AC20. We provide quality components at competitive prices, ensuring your automation projects stay on budget and on schedule.

Technical specifications

Type	Power Contactor
AC-3e/AC-3 Rating	38A, 18.5kW @ 400V
Poles	3
Coil Voltage	24V AC
Frequency	50/60 Hz
Auxiliary Contacts	1 NO + 1 NC
Terminal Type	Screw
Size	S0

Common applications

Motor Control

Industrial Machinery

Control Panels

Power Switching

Automation Systems

Compatible systems

Integrates seamlessly with Siemens motor starters, overload relays, and control systems within the SIRIUS modular system.

Also known as

Siemens 3RT2028 Contactor SIRIUS 3RT2028 3RT2028-1A 38A Siemens Contactor

Replaces / compatible with

This contactor can replace Siemens 3RT2028 variants with identical ratings and coil voltage. It is compatible with standard Siemens control accessories.

Technical note

Expert tip

The screw terminals are suitable for solid or stranded copper conductors up to 10 mm², ensuring a secure electrical connection.

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Frequently asked questions

What is the auxiliary contact configuration and coil frequency for the Siemens 3RT2028-1AC20?

The Siemens 3RT2028-1AC20 features 1 normally open (NO) and 1 normally closed (NC) auxiliary contact. Its 24V AC coil is designed to operate reliably at both 50 Hz and 60 Hz frequencies.