[Lifetime Warranty] SSR-25DD DC to DC Solid State Relay | Pack of 2
Two SSR-25DD solid state relays with clear protective covers and blue labels.
SSR-25DD solid state relay wiring diagram showing DC power supply and load connections.
Single SSR-25DD solid state relay with copper terminal outputs and heat-dissipating metal back plate.
Two SSR-25DD solid state relays shown from front and back angles with technical feature icons.
Collage showing various industrial and electronic applications for SSR-25DD solid state relays.
SSR-25DD solid state relay installed in a control panel with wiring and a close-up of the relay unit.
Couple relaxing on a couch using a remote to control a wall-mounted BlueStar air conditioner.
Two SSR-25DD solid state relays with clear protective covers and blue labels.
SSR-25DD solid state relay wiring diagram showing DC power supply and load connections.
Single SSR-25DD solid state relay with copper terminal outputs and heat-dissipating metal back plate.
Two SSR-25DD solid state relays shown from front and back angles with technical feature icons.
Collage showing various industrial and electronic applications for SSR-25DD solid state relays.
SSR-25DD solid state relay installed in a control panel with wiring and a close-up of the relay unit.
Couple relaxing on a couch using a remote to control a wall-mounted BlueStar air conditioner.
Lifetime Warranty

[Lifetime Warranty] SSR-25DD DC to DC Solid State Relay | Pack of 2

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SSR-25DD Solid State Relay

Key Features

  • Control Method: DC to DC (DC Input, DC Output)
  • Input Control Voltage: 3-32V DC
  • Output Load Voltage: 5-200V DC
  • Maximum Load Current: 25A
  • Response Time: ≤10ms
  • Dielectric Strength: >2.5KV
  • Design: No moving parts for silent operation and extended lifespan. Features an isolated baseplate for efficient heat dissipation.

Replaces / Cross-Reference Part Numbers

  • SSR-25DD

Compatibility & Fitment

  • Suitable for switching high-current DC loads using a low-voltage DC control signal.
  • Common applications include industrial automation, CNC machinery, DC motor control, DC heating elements, and robotics.
  • Compatible with output signals from microcontrollers such as Arduino, Raspberry Pi, and other PLC systems.

When to Replace

  • The relay fails to activate the load when a control signal is present.
  • The load remains permanently on, even without a control signal.
  • Switching becomes intermittent or unreliable.
  • The relay overheats excessively during operation, indicating internal failure.
  • Visible physical damage, such as cracks, burns, or melted housing.

Installation Tips

  • Disconnect all power sources before installation or service.
  • A heat sink is required for load currents exceeding 10A to ensure proper thermal management and prevent overheating.
  • Apply a thin layer of thermal paste between the relay's metal base and the heat sink for optimal heat transfer.
  • Ensure all wire connections are secure to prevent poor contact and potential arcing.
  • Verify correct polarity for both the DC input (control) and DC output (load) terminals.
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  • Perfect fit

    Perfect fit

    Diverse applications in controlling computer peripherals, AC motors, lighting systems, spanning automation setups to enhance security and performance
  • Premium quality

    Premium quality

    This product adopts a heat-dissipating metal back plate and a copper terminal lug for superior conductivity.
  • Saving solution

    Saving solution

    Enjoy the great feeling when your engine is repaired and works properly like before - BlueStars brings DIY solutions to help you deal with any trouble
  • Simple installation

    Simple installation

    Solid State Relay is a simple part & just takes few minutes to install and will save you at least a hundred bucks in labor.
BRINGING RELIABILITY TO THE SWITCH

BRINGING RELIABILITY TO THE SWITCH

Model
SSR-25DD
Control method
DC to DC
Control (Input) Voltage
3-32VDC
Load (Output) Voltage
5-220VDC
Min Control Current
5MA
Max Control Current
20MA
Current & Frequency
25A

FAQ

The SSR-25DD is a DC-to-DC solid state relay designed for a control voltage (input) of 3-32V DC and a load voltage (output) of 5-60V DC. It is rated for a maximum load current of 25A.
A failed relay typically exhibits one of two states: it either fails 'open,' meaning the load will not receive power even when the control signal is active, or it fails 'shorted' (closed), meaning the load remains powered continuously regardless of the control signal status. If your device stays on or off permanently despite the input signal, the relay is likely compromised.
Yes. Even though these are rated for 25A, solid state relays generate heat during operation. To prevent thermal shutdown or permanent internal damage, you should mount the relay to an appropriately sized aluminum heatsink using thermal paste to ensure efficient heat dissipation.
The SSR-25DD is specifically designed for DC switching applications. It uses internal MOSFETs to handle DC loads. You cannot use this relay to switch AC mains voltage; for AC applications, you would require an SSR-25DA or similar model designed for AC load switching.
Installation is straightforward. You will need a small flat-head or Phillips screwdriver for the terminal screws, and a thermal compound (thermal grease) to apply between the relay base and your heatsink. If you are mounting the heatsink to a chassis, you will also need the appropriate mounting hardware for your specific enclosure.