A402KF high-performance solid-state relay

Product Overview

The A402KF is a high-performance solid-state relay (SSR) from Omron, designed to provide reliable switching control in industrial automation systems. This advanced SSR is engineered to replace traditional electromechanical relays, offering superior speed, durability, and precision in applications such as heating control, motor drives, and power distribution. Ideal for use in semiconductor manufacturing, food processing, and pharmaceutical production, the A402KF stands out for its silent operation, long service life, and resistance to mechanical wear. Its compact design ensures efficient use of panel space, while its robust construction enables reliable performance in harsh environments with high vibration, electrical noise, and temperature variations. With a focus on efficiency and longevity, the A402KF minimizes maintenance needs, reduces downtime, and enhances overall system stability in critical industrial processes.

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Technical Specifications

Parameter	Value
Product Model	A402KF
Manufacturer	Omron
Product Type	Solid-State Relay
Rated Load Current	40A
Load Voltage Range	24-240V AC
Control Signal	3-32V DC
On-State Voltage Drop	≤ 1.5V AC
Operating Temperature	-30°C to +70°C
Enclosure Rating	IP00 (open type, panel-mounted with heatsink)

Key Features and Benefits

The A402KF combines cutting-edge solid-state technology with industrial-grade reliability, making it a standout choice for precision switching applications. Its 40A rated load current and wide voltage range (24-240V AC) allow it to handle diverse loads, from heating elements in industrial ovens to small motors in packaging machinery, providing versatile control without the need for multiple relay types.

Speed and durability are defining attributes: the SSR switches in microseconds, far faster than electromechanical relays, enabling precise control of rapidly changing processes—such as temperature regulation in semiconductor fabrication, where even minor fluctuations can affect product quality. Unlike mechanical relays, the A402KF has no moving parts, eliminating wear and tear, arcing, and contact bounce, resulting in an operational lifespan of up to 100 million cycles—significantly reducing replacement frequency and maintenance costs.

Efficiency is another key advantage: its low on-state voltage drop (≤1.5V AC) minimizes power loss, making it ideal for energy-sensitive applications. The relay’s resistance to electromagnetic interference (EMI) ensures stable operation in electrically noisy environments, such as factory floors with heavy machinery.

Integration is seamless, with a 3-32V DC control signal that compatible with standard PLC outputs and analog controllers. Its compact design, when paired with a suitable heatsink, saves panel space, while LED indicators provide clear status monitoring. Backed by a one-year warranty, the A402KF offers a reliable, long-lasting solution for industrial switching needs, combining performance with cost-effectiveness.

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Related Models

A401KF – Lower current variant (25A), suitable for lighter loads like small heating elements or fans.

A403KF – Higher current model (60A), designed for heavy-duty applications such as large motor drives or industrial heaters.

A402KF-DC – DC load version, capable of switching 24-100V DC loads for applications like battery-powered equipment.

A402KF-H – High-temperature rated variant (-40°C to +85°C), ideal for extreme environment deployments like foundries or cold storage.

A402KF-S – Safety-enhanced model with reinforced isolation, suitable for applications requiring enhanced electrical safety.

A402KF-AC – AC control signal version (90-250V AC), compatible with systems using alternating current control signals.

As a certified partner of Omron and other industry leaders, we provide expert pre-sales support to help select the right solid-state relay for your application, including heatsink sizing and compatibility checks. Our after-sales services include technical troubleshooting and performance verification. All products come with a one-year warranty. For models not listed, contact us via WhatsApp: [https://wa.me/+86 19389860630] or Email: jllucky33@qq.com.