Industrial Solid State Relay (SSR) for AC & DC Load Control – Epoxy Encapsulated

This industrial solid state relay (SSR) is designed for safe, reliable, and maintenance-free switching of AC and DC electrical loads. Using solid-state switching technology, it eliminates mechanical wear, contact arcing, and noise associated with traditional electromechanical relays.

The relay is epoxy encapsulated, providing enhanced protection against vibration, dust, and environmental exposure, making it suitable for industrial control panels, automation systems, heating control, motor control, and power regulation applications.

Multiple control and load configurations are available, allowing the relay to be matched to a wide range of system requirements. Correct relay sizing is critical and depends on load type (resistive, inductive, or capacitive), with higher safety margins recommended for non-resistive loads.

These solid state relays are commonly used in manufacturing, HVAC systems, temperature control, process automation, power regulation, and electrical protection systems, where long service life and reliable switching are required.

Solid State Relay Selection Guide

Step 1: Choose Control & Load Type

DC Control → AC Load

• Control Input: DC 3–32 V

• Load Output: AC 24–480 V

AC Control → AC Load

• Control Input: AC 70–280 V

• Load Output: AC 24–480 V

DC Control → DC Load

• Control Input: DC 3–32 V

• Load Output: DC 5–75 V

Step 2: Choose Correct Current Rating

To ensure reliability and long service life, select relay current capacity based on load type:

• Resistive Loads (heaters, ovens, incandescent lamps):
  SSR current ≥ 3 × load working current

• Inductive Loads (motors, fans, pumps, transformers, air conditioners):
  SSR current ≥ 6 × load working current

• Capacitive Loads (capacitors, battery systems):
  SSR current ≥ 10 × load working current

Voltage Regulator / Power Controller Options

Control Signal Selection

• 4–20 mA Control → Load: 0–280 VAC

• 0–10 V Control → Load: 0–280 VAC

• 0–5 V Control → Load: 0–280 VAC

Current Selection (Resistive Loads)

• Recommended: Controller current ≥ 2 × load working current

Key Applications

• Industrial automation and control panels

• Heating and temperature control systems

• Motor and fan control

• HVAC and process equipment

• Power regulation and protection circuits

• Manufacturing and electrical systems