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  • SainSmart 8-Channel 5V Solid State Relay Module Board for Arduino Uno Duemilanove MEGA2560 MEGA1280 ARM DSP PIC
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SainSmart 8-Channel 5V Solid State Relay Module Board for Arduino Uno Duemilanove MEGA2560 MEGA1280 ARM DSP PIC


List Price: $33.29
Price: $28.24 & FREE Shipping on orders over $35. Details
You Save: $5.05 (15%)
Only 5 left in stock (more on the way).
Ships from and sold by Amazon.com. Gift-wrap available.
8-CH
  • Has been assembled, and electrical test passed.
  • Led indicator for each relay.
  • FR-4 Fiber glass PCB (Double Layer); Size: 155 x 55 x 24 mm (approximately 6.1 x 2.17 x 0.95 inch)
  • Input control signal voltage: 0V - 0.5V Low stage (SSR is OFF), 0.5V - 2.5V (unknown state), 2.5V - 20V High state (SSR is ON); SSR Output (each channel); Load voltage range: 75 to 264VAC (50/60Hz); Load current: 0.1 to 2 AMP
  • Standard interface that can be controlled directly by microcontroller (Arduino , 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic)
4 new from $27.99 3 used from $24.15

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Frequently Bought Together

SainSmart 8-Channel 5V Solid State Relay Module Board for Arduino Uno Duemilanove MEGA2560 MEGA1280 ARM DSP PIC + SainSmart 8-Channel Relay Module + Phantom YoYo 40P dupont cable 200mm male to female
Price for all three: $48.92

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Size: 8-CH
  • Buy Used and Save: Buy a Used "SainSmart 8-Channel 5V Solid State Relay Module Bo..." and save 27% off the $33.29 list price. Buy with confidence as the condition of this item and its timely delivery are guaranteed under the "Amazon A-to-z Guarantee". See all Used offers.

Technical Details

Size: 8-CH
  • Brand Name: SainSmart
  • Model: SR-902
  • Item Package Quantity: 1

Product Details

Size: 8-CH
  • Product Dimensions: 5.9 x 3.1 x 1.6 inches ; 3.2 ounces
  • Shipping Weight: 1 pounds (View shipping rates and policies)
  • Shipping: Currently, item can be shipped only within the U.S.
  • ASIN: B006J4G45G
  • Item model number: SR-902
  • Average Customer Review: 4.7 out of 5 stars  See all reviews (51 customer reviews)
  • Amazon Best Sellers Rank: #16,242 in Electronics (See Top 100 in Electronics)
  • Date first available at Amazon.com: December 7, 2011

Product Description

Size: 8-CH

Specifications SSR Output (each channel) Load voltage range: 75 to 264VAC (50/60Hz). Load current: 0. 1 to 2 AMP. Power supply 5VDC / 160mA (all channel ON). Input control signal voltage: 0V - 0. 5V Low stage (SSR is OFF) 0. 5V - 2. 5V (unknown state). 2. 5V - 20V High state (SSR is ON). SSR Spec. Manufacturer: OMRON Part number: G3MB-202P, 5V version. Isolation: Phototriac. Zero cross: Yes. Rated output load: 2A at 100 to 240VAC. (50/60Hz). Load type: General purpose.

Customer Questions & Answers

Customer Reviews

4.7 out of 5 stars
5 star
40
4 star
10
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See all 51 customer reviews
The board worked perfectly.
John Swander
The relay itself is optocoupled; so there is plenty of electrical isolation between the Arduino board and the relay.
J. Fulmer
This SSR board is very compact for what it can do, and seems to work well.
RouterJockey

Most Helpful Customer Reviews

25 of 25 people found the following review helpful By J. Fulmer on May 11, 2012
Size Name: 8-CH Verified Purchase
As an electronics hobbyist, I am planning to design my own Christmas light show this year and dreaded the idea of having to build boards with relays on them that could be controlled by my Arduino. This board has all the features I could possibly want, and it's designed better than what I would have done at a fraction of what it would have cost me to do.

NOTE: This uses a triac; so it's not going to work for switching on direct current loads. I verified that with a quick test. It works great for AC loads, but is not designed for DC loads. If you need to control DC loads, then you'll want to purchase the mechanical relay board also made by Sainsmart.

A schematic of how each relay is wired is given at the Sainsmart website. Based on that and some measurements I've made, here are some features that aren't obvious from the description.

1. Each relay is protected by a fuse. Granted, the fuse is hard-soldered to the board; so if you blow the fuse, you'll have to de-solder and re-solder a new fuse in place, but that's not a huge problem. Protects each circuit from drawing more than the 2 amps that the relay is rated for.

2. The signal from the Arduino doesn't cut on the relay directly. Instead, the signal from the Arduino turns on a transistor, which closes a circuit that turns on the relay. The relay itself is optocoupled; so there is plenty of electrical isolation between the Arduino board and the relay. No worries at all on my part about frying my Arduino board.

3. Each relay draws about 10 milliamps from the Arduino when switched on. If you're only turning on a few relays at the time, that is not a problem for the Arduino to handle.
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14 of 14 people found the following review helpful By Big John on November 18, 2012
Size Name: 8-CH Verified Purchase
I overloaded the circuit and blew one of the fuses. This is not the fault of the board, it is my fault. Anyway the fuses were a little harder to find than just going to Radio Shack and picking one up. I found them over at Mouser. Here is the part number for anyone looking for more fuses.

Mfg. Littelfuse
Part # 0251002.MXL

[...]
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7 of 7 people found the following review helpful By staff-fam on February 25, 2013
Size Name: 2-CH Verified Purchase
The relay interfaced nicely with the raspberry pi and seems to work great. Being solid state there's no audible "click" when you trigger the relay which is nice. LED indicators let you know if a particular relay is active or not. I have another SainSmart 5V 2-channel relay (not solid state -[...] and the problem I had with it was that it was ACTIVE LOW (no a defect, but by design). So, whenever my raspberry pi rebooted and the signal on that GPIO pin dropped to LOW, the relay triggered (which is not what I wanted).

But, with this Solid State version, it is ACTIVE HIGH, so a reboot or power outage of the Pi does NOT trigger the relay (which is what I want). This is a great relay and I highly recommend it if the specs fit your needs.
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3 of 3 people found the following review helpful By Wynneth on February 10, 2013
Size Name: 8-CH Verified Purchase
Simple and straight forward. I use this connected to a Raspberry Pi, with an external 5v adapter, and 120V AC sockets attached to each relay. No transistors necessary, connected GPIO pins from the Pi to the numbered terminals on this board, 5v power to the 5v terminal, and ground to both GND terminals. To wire AC current on the switched side you can connect either the AC/mains common OR the hot, I prefer to go with the common. When GPIOs are switched to high, the relay turns on, and an LED on the board turns on for each relay.
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2 of 2 people found the following review helpful By Magnus Borg on November 24, 2012
Size Name: 8-CH Verified Purchase
Works awesome, just remember that you can only run AC through these SSRs. Otherwise its a nice product for the price.
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2 of 2 people found the following review helpful By Dale S. on February 8, 2012
Size Name: 8-CH Verified Purchase
After contacting sainsmart they provided me with a schematic. Ask for joanna and she will be happy to help you.
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1 of 1 people found the following review helpful By HGM on March 30, 2013
Size Name: 2-CH Verified Purchase
This is well made.

The design includes not only fuses but the slots in the PCB to separate the low and high voltage sides of the circuitry, this is a safety implementation that most home-brewed solutions would omit.
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1 of 1 people found the following review helpful By JSherman on January 6, 2013
Size Name: 8-CH Verified Purchase
I was trying to make a circuit like this myself. The cost of fewer than 8 relays alone were over $30 (mouser.com). This was a great value and works well. The LEDs that illuminate to indicate active channels are helpful in testing.

I didn't realize at first that with solid-state relays, you cannot test their state (open/closed circuit) by checking continuity. I was doing this and thought all the channels were non-functional. After I connected an actual load though, they worked beautifully. I can ever get them to switch as fast as 200ms!
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