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Siemens 3RF2020-1AA42 1-Phase Semiconductor Relay

Siemens 3RF2020-1AA42 1-phase semiconductor relay, 20A, flexible control voltage.

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ManufacturerSiemens

Part number3RF2020-1AA42

Type Semiconductor Relay

Phases 1

Current Rating 20 A

Control Voltage 24-230 V AC / 4-30 V DC

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Veteran-owned

CAGE: 9NK75

1-phase solid-state switching Wide control voltage range 20A current capacity Screw terminals for easy connection Designed for heat sink mounting

Product description

The Siemens 3RF2020-1AA42 is a 1-phase semiconductor relay designed for efficient solid-state switching. It has a current rating of 20 Amps and features a wide control voltage range of 24 to 230V AC or 4 to 30V DC. This relay has a width of 45 mm and is equipped with screw terminals, designed for mounting on available cooling surfaces to manage heat dissipation.

This semiconductor relay is suitable for a variety of single-phase switching applications where reliable and fast switching is required, such as controlling small motors, heating elements, or lighting. Its ability to operate with diverse control voltages makes it highly flexible for integration into different control systems. The requirement for mounting on a cooling surface is crucial for its proper operation at higher loads.

Stanlo Automation, a veteran-owned distributor of surplus industrial automation parts, offers the Siemens 3RF2020-1AA42. We provide dependable access to essential automation components, ensuring your systems are supported by quality parts you can trust.

Technical specifications

Type	Semiconductor Relay
Phases	1
Current Rating	20 A
Control Voltage	24-230 V AC / 4-30 V DC
Width	45 mm
Terminals	Screw
Mounting	Requires cooling surface

Common applications

Single-phase motor control

Industrial heating control

Lighting control

Automation systems

Process control

Compatible systems

Compatible with control signals from PLCs, microcontrollers, and other automation devices within the specified voltage ranges

Also known as

Siemens 3RF2020 relay 20A semiconductor relay Siemens solid state relay 45mm

Replaces / compatible with

Suitable for replacing electromechanical relays in applications demanding faster switching speeds, longer life, and reduced electrical noise.

Technical note

Expert tip

Proper thermal management by using an adequate heat sink is critical for the continuous operation and lifespan of this 20A semiconductor relay.

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Frequently asked questions

What is the required mounting condition for the Siemens 3RF2020-1AA42 semiconductor relay?

The Siemens 3RF2020-1AA42 semiconductor relay requires mounting on an available cooling surface. This is essential to dissipate the heat generated during operation, especially when running at or near its 20A capacity, ensuring reliable performance and longevity.