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Product Feature：
- Solid state relay with flame-retardant plastic housing, epoxy casting compound, sturdy and durable with compact appearance.Used with aluminum heat sink to effectively reduce the high temperature generated by relay operation.
- SSR switches use semiconductor component acts as a switch for the relay, connection by screw terminals,high strength, impact resistance and strong vibration resistance, with low requirement for input current.
- It is specially designed for harsh environments with corrosion, humidity or light-proof/explosion-proof requirements and frequent turn-on/off requirements.
- They can be easily connected with digital control circuits of computers.They are updated products of AC and DC contactors.
Solid State Relay DC to AC 25A
Material: ABS plastic , Metal , Copper
Control Voltage: 3-32VDC
Load Voltage: 24-480VAC
Load Current: 25A
On-off-Time:≤10ms
Ambient Temperature:-20~+75℃
Package Contents
- 1*SSR 25DA
- 1*black heat sink
- 2*mini bag of thermal grease
- 2*screw
Flame-Retardant Housing
High quality flame retardant material shell, good insulation performance, high safety factor
Wiring Contacts
Electroplated wiring contacts, not easy to rust, good contact, clear screw threads, not easy to slip wire
Double Side Flip Cover Design
Transparent flip cover protection design to effectively avoid accidental touching and prevent short circuit caused by dust entry.
Heat Sink Base Plate
Special plated aluminum back plate, anti-oxidation, corrosion resistance, excellent heat dissipation
Clark Ludahl
2025-09-04 10:09:51
I purchased an SSR-25DD Solid State Relay for use in a solar energy project at my house.I am using solar panels to heat the water in our 50 gallon electric water heater tank by connecting the output of the solar panels directly to the heating element in the water heater. I needed a way to switch the high dc voltages and currents from the solar panels off and on if the water in the water heater tank gets too hot. The water heater thermostats are not designed for or rated to switch high dc currents and voltages on and off. The solution was to use an SSR-25DD SSR to switch the high dc currents and voltages on and off, and use the water heater thermostat to switch the low voltage input of the SSR-25DD on and off. That has proven to be a great solution and it has been working reliably now for several weeks. I was amazed at how inexpensive the SSR-25DD was, and it even comes with a large heat sink, screws to attach the heat sink to the SSR, and heat sink grease. I am very pleased with this product.
Spidermanderson
2025-08-20 12:03:59
The cover is very nice to have. I see that this is thicker than the other DA types. With a 12 amp load (shop vac) the heat sink was not needed, but if w/o compound and the heat sink should hold up at 25 amps with higher temps easy. I bought many different brands and happy with this one. For the price and quality definitely great deal, thanks! The DD worked well also.
Chris
2025-07-06 10:40:51
The screw terminals are too small to hold 2 ferrules. Even 1 is sketchy AF. The screws themselves are pretty terrible too, really shallow for Philips and likely to strip the head of you try putting any torque on them
6strings
2025-05-18 16:28:36
This is the problem with many super inexpensive SSRs - the screw terminals are not very good. These relays do work, too bad they didn’t charge a few more dollars and put on better hardware.
Carlos Villalba
2025-03-20 20:29:46
Excelente producto buen vendedor!
Joe
2025-02-21 17:44:37
I'm using it for a homemade pemf. it works good. I use it between 3 and 50hz. one thing to note is the load "contact" only works in one direction. I'm switching the negative so the powersource negative has to be on the negative of the contact.
Russ
2025-02-13 18:28:13
I've went through three different SSR's and one mechanical relay before trying this one, and I wasn't hopeful, figuring that it would fail like all the rest. I am very happy that it didn't!! I'm switching up to 25a at 48Vdc and so far, it's working as advertised! I do have a 10a Silicon Rectifier Diode across the load side, cathode to the positive side. Also, the wiring diagram shown is wrong for the load side. It's backward from what the picture shows, positive side of the power supply on the right terminal, and load side on the left terminal.
Beca H.
2024-12-20 12:27:36
Fast heating of my hotbed, no quality issues that I saw, and works as it should.I'll be buying these again.
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