Songle SRD Series 48V DC Relay

The Songle SRD series 48V DC relay, with a nominal current of 10A and a contact voltage of 250V, is a compact, PCB-mountable electromagnetic device. This relay is extensively utilized in a variety of electrical and electronic applications.

General Characteristics

• Brand: Songle
• Series: SRD
• Nominal Current: Generally 10A
• Contact Configuration: SPDT (Single Pole Double Throw) or SPST (Single Pole Single Throw)
• Coil Voltages: Offered in multiple voltages including 3V, 5V, 6V, 9V, 12V, 24V, 48V DC
• Contact Voltage: 250V AC or 30V DC
• Size: Compact design suitable for PCB mounting

Technical Details

• Coil Resistance: Dependent on voltage (e.g., approximately 400Ω for 12V DC)
• Operate Time: Maximum of 10ms
• Release Time: Maximum of 5ms
• Dielectric Strength: 500VAC (coil to contact), 1000VAC (between contacts)
• Mechanical Life: 10 million operations
• Electrical Life: 100,000 operations (at nominal load)

Use Cases

• This relay is commonly used in:
  Industrial Control Systems: for machine and motor control
• Home Automation: in lighting, heating, and cooling systems
• Security Systems: in alarm systems and security doors
• Automotive Applications: for electric windows and headlights
• Electronic Projects: with Arduino and other microcontroller projects

Advantages

• High Reliability: The electromechanical design ensures durability and reliability.
• Wide Application Range: Suitable for both AC and DC loads.
• Easy Installation: Can be easily mounted on PCBs.

Disadvantages

• Mechanical Wear: Mechanical components may wear out over time, potentially shortening the relay's lifespan.
• Size: May be larger compared to solid-state relays in certain applications.

Example Product: SRD-24VDC-SL-C

• Coil Voltage: 24V DC
• Coil Resistance: 70Ω
• Nominal Current: 10A
• Contact Configuration: SPDT
• Operate and Release Time: 10ms and 5ms