Fotek SSR-40DD Solid State Relay Module

The Fotek SSR-40DD is a DC-to-DC solid state relay designed for reliable, silent switching of high-current DC loads. It uses semiconductor switching instead of mechanical contacts, providing long service life, fast response, and noise-free operation. This relay is ideal for automation systems, industrial control, and DC load switching applications.

Technical Specifications:

• Model: SSR-40DD
  
• Relay Type: Solid State Relay (DC to DC)
  
• Load Voltage: 5–200 VDC
  
• Control/Input Voltage: 3–32 VDC
  
• Load Current: Up to 40 A (with proper heatsinking)
  
• Switching Type: MOSFET output
  
• Isolation: Optical isolation between input and output
  
• Mounting: Panel mount with metal base plate
  
• Indicator: Input status LED

Features:

• Silent switching with no mechanical wear
  
• High switching speed and long operational life
  
• Opto-isolated input for improved safety
  
• Compact and rugged industrial design
  
• Metal base for effective heat dissipation (heatsink recommended)
  
• Low control current, compatible with microcontrollers and PLCs

Applications:

• DC motor control
  
• Battery and power supply switching
  
• Industrial automation systems
  
• CNC machines and control panels
  
• Robotics and embedded control projects