This document introduces the EEEE series solid state relays from Shenyang Bestall Electronic Equipment Research Institute. The relays in this series feature DC control, AC zero-crossing conduction, zero-crossing turn-off, and are suitable for controlling electric motors, heaters, incandescent lamps, and other appliances.
The E0442-32D solid state relay is a DC‑input, AC‑zero‑crossing, zero‑crossing turn‑off type non‑contact relay. It offers low di/dt, smooth start‑up, low EMI, and helps protect loads such as motors, heaters, and incandescent lamps.
The guide lists input control voltage (3‑32 Vdc), rated switching voltage (420 Vac), rated current (4 A), and other electrical parameters. It also explains how to select an appropriate PCB heat sink, noting that each ampere dissipates about 1.5 W and that heat‑sink size, ambient temperature, ventilation, and mounting density must keep the contact temperature below 80 °C. This manual is written in Chinese.
| Input control voltage | 3‑32 Vdc |
|---|---|
| Rated switching voltage | 420 Vac |
| Rated switching current | 4 A |
The input control voltage range is 3 Vdc to 32 Vdc.
The relay is rated for 420 Vac switching voltage and 4 A switching current.
Each ampere of load causes about 1.5 W of heat dissipation.