Kudom KSQE 3‑Phase Solid‑State Relays: Powered by Robust Performance & Custom‑Built Services

Step into the production workshop of Kudom Electronics, where batches of KSQE‑series 3‑phase AC solid‑state relays are undergoing factory‑integrated assembly with matched heat sinks. Every procedure, from module calibration to screw tightening, is carried out in strict accordance with production specifications. This is a tailor‑made order for our customer: the KSQE solid‑state relays are pre‑assembled with compatible heat sinks for delivery, saving customers the hassle of on‑site assembly and enabling direct machine installation upon receipt.

As Kudom’s classic industrial‑grade product, the KSQE series 3‑phase normally‑open AC solid‑state relays deliver consistent and reliable electrical performance for a wide range of 3‑phase industrial load‑control applications. Built with bidirectional thyristor output architecture, the series offers three rated current options: 10A, 15A and 25A, supporting a wide load‑voltage range of 24‑530VAC to fit 3‑phase motors, industrial heating systems, automated equipment and other loads of varying power levels. For superior compatibility, it accepts both 4‑32VDC DC control and 90‑280VAC AC control inputs, allowing seamless connection to mainstream industrial control systems without additional conversion modules.

Reliability stands as the core priority for industrial components. The KSQE series features dual‑protection circuitry with built‑in RC snubber and MOV surge protection, effectively suppressing voltage spikes and surges generated during load switching and mitigating damage caused by on‑site electromagnetic interference. It provides 4000Vrms dielectric withstand voltage between input and output, 2500Vrms withstand voltage between I/O terminals and baseplate, as well as insulation resistance up to 1000MΩ, delivering ample safety margin for harsh industrial environments. Compliant with RoHS directives, the product operates stably across a broad temperature range of ‑30℃ ~ +80℃. Take the 25A model as an example: it withstands 250A surge current for 10 ms, coping reliably with inrush loads such as motor start‑up and guaranteeing long‑term equipment operation.

This custom service is developed by Kudom to address real‑world pain‑points for end users. For solid‑state relays, heat dissipation directly governs service life and operational stability. Mismatched heat sinks or non‑standard assembly may result in thermal derating, shortened service life or even component failure. Many customers source relays and heat sinks separately. They spend extra effort on part‑matching, yet potential risks remain from insufficient screw torque or improper thermal interface material application.

To solve these challenges, Kudom provides factory‑complete custom solutions of “relay plus heat sink”. For each custom order, heat sinks with qualified thermal resistance are selected strictly following the official KSQE temperature derating curve. Standardized assembly procedures are implemented: thermal interface material is evenly applied to contact surfaces, and mounting screws are tightened to specified torque to ensure tight contact between relay baseplate and heat sink for optimal heat dissipation. Every assembled unit goes through unified factory testing, with full‑range quality control covering electrical performance and assembly workmanship.

For customers, Kudom’s custom service eliminates the whole workflow of heat‑sink selection, procurement, assembly and commissioning. Risks stemming from improper assembly are avoided. Units are ready for wiring and installation right after delivery, greatly shortening project lead‑time and realizing true one‑stop procurement for plug‑and‑play convenience. Supported by mature manufacturing and quality‑control systems, Kudom guarantees delivery quality for both small‑batch custom orders and large‑volume production.

From high‑performance standard components to custom‑tailored turn‑key solutions, Kudom Electronics keeps optimizing products and services around real‑world customer demands. The custom pre‑assembly of KSQE 3‑phase solid‑state relays represents an extension of product performance as well as service capability. Going forward, Kudom will continue to deepen its expertise in industrial control, and deliver reliable, flexible load‑control solutions for industrial clients.