This document introduces the DDDD series solid state relays from Shenyang Baiter Electronic Equipment Research Institute. The series is DC input and DC output type, which can realize DC level conversion, isolation, and control. It is widely used in industrial automation for controlling various DC-powered actuators, especially in corrosive, humid, and explosion-proof environments.
The D4011-326 is a DC input, DC output solid‑state relay designed for industrial automation, suitable for lighting, small DC motors, power supplies, electromagnetic devices and smart meters. It offers level conversion, isolation and control, and is appropriate for harsh environments such as corrosive, humid or explosion‑prone locations.
This guide covers technical parameters, input and output control characteristics, general ratings, recommended bolt‑mount installation, and heat‑sink selection guidelines to ensure reliable operation under various ambient temperatures and load conditions. This manual is written in Chinese.
| Rated Input Current | 40 A |
|---|
Each ampere of current generates about 1 W of heat in the SSR.
The mounting surface temperature should not exceed 80 °C.