House - Electrical Parts [Lifetime Warranty] SSR-25DA DC to AC Solid State Relay | Pack of 2
Two SSR-25DA solid state relays with 3-32VDC input and 24-380VAC output terminals.
Wiring diagram for SSR-25DA solid state relay showing AC load and DC input connections.
Single SSR-25DA solid state relay module with copper terminal outputs and heat-dissipating metal back plate.
Two SSR-25DA solid state relay modules showing front and back views with technical specifications.
Collage showing industrial, renewable energy, and electronic applications for SSR-25DA solid state relays.
SSR-25DA solid state relay module shown in an installation diagram with wiring and text overlay.
Couple relaxing on a sofa using a remote control for a wall-mounted air conditioner.
Two SSR-25DA solid state relays with 3-32VDC input and 24-380VAC output terminals.
Wiring diagram for SSR-25DA solid state relay showing AC load and DC input connections.
Single SSR-25DA solid state relay module with copper terminal outputs and heat-dissipating metal back plate.
Two SSR-25DA solid state relay modules showing front and back views with technical specifications.
Collage showing industrial, renewable energy, and electronic applications for SSR-25DA solid state relays.
SSR-25DA solid state relay module shown in an installation diagram with wiring and text overlay.
Couple relaxing on a sofa using a remote control for a wall-mounted air conditioner.
Lifetime Warranty

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

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SSR-25DA Solid State Relay

Key Features

  • Input Control Voltage: 3-32V DC
  • Output Load Voltage: 24-380V AC
  • Maximum Load Current: 25A
  • Design: Solid-state construction with no moving parts for high reliability and long service life.
  • Actuation: Zero-crossing turn-on circuit.

Replaces / Cross-Reference Part Numbers

  • SSR-25DA

Compatibility & Fitment

  • Suitable for controlling single-phase AC loads in various applications.
  • Commonly used in industrial automation, temperature control systems, PLC outputs, motor controls, and lighting equipment.
  • Requires an appropriate heat sink for operation with loads greater than 10A to ensure proper heat dissipation.

When to Replace

  • Relay fails to activate the load circuit when control voltage is applied.
  • Relay remains activated and will not turn off the load circuit when control voltage is removed.
  • Intermittent or unpredictable switching behavior.
  • Visible signs of physical damage, such as cracking or burn marks on the housing.

Installation Tips

  • Disconnect all power to the circuit before installation.
  • Verify correct polarity (+/-) for the DC input control terminals.
  • Apply a thin layer of thermal compound between the relay's metal base and the heat sink.
  • Mount the relay securely to a heat sink of adequate size for your load current.
  • Ensure all wire connections are tight and secure to prevent overheating.
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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

Color
White
Material
Metal / ABS Plastic
Relay Type
DC to AC (DA) — Zero-Cross Trigger, Single Phase
Input Voltage
3–32V DC
Input Control Current
5–25mA DC
Output Voltage
24–380V AC
Output Current
25A
Frequency
50/60Hz
Turn-Off Time
≤10ms
Off-State Leakage Current
≤2mA
On-State Voltage Drop
≤1V
Isolation Resistance
>50MΩ @ 500V DC
Dielectric Strength
>2.5KV
Working Temperature
-20°C to +75°C
Mounting Hole Diameter
4.5mm (0.18")
Dimensions (L x W x H)
60 x 45 x 23mm (2.36" x 1.77" x 0.91")
Item Weight
~97–98g

FAQ

This SSR-25DA model features a 3-32V DC input control voltage and a 24-380V AC output load voltage, with a maximum current capacity of 25A.
A failed relay typically manifests as the load remaining permanently 'on' even when the control signal is removed, or the load failing to activate despite a valid input signal. If you notice the relay housing is discolored or smells of ozone, it has likely suffered an internal short circuit.
Yes. Solid state relays generate heat during operation. To prevent thermal failure, you must mount the relay to an appropriately sized aluminum heat sink using thermal conductive paste or a thermal pad. Operating at high current levels without a heat sink will significantly shorten the lifespan of the device.
No. The SSR-25DA is specifically designed for switching AC loads. Attempting to use this relay for DC load switching will result in the relay failing to turn off once activated.
Ensure the power is disconnected before installation. Apply a thin, even layer of thermal compound to the base of the relay before bolting it to your heat sink. Ensure all terminal connections are tight, as loose connections can cause high resistance and localized heating, which may damage the terminals.