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Description
SSR-40DA DC to AC Solid State Relay - 3 PackSSR 40DA Solid State Relay Key Features Model: SSR 40DA Type: Single phase solid state relay Control Input Voltage: 3 32V DC Load Output Voltage: 24 380V AC Maximum Load Current: 40A Switching Method: Electronic, for fast response and long service life Construction: Aluminum heat dissipating base plate with screw terminals Replaces Cross Reference Part Numbers SSR 40DA Replaces solid state relays with matching electrical specifications (3 32V DC
SSR-40DA Solid State Relay
Key Features
- Model: SSR-40DA
- Type: Single-phase solid state relay
- Control Input Voltage: 3-32V DC
- Load Output Voltage: 24-380V AC
- Maximum Load Current: 40A
- Switching Method: Electronic, for fast response and long service life
- Construction: Aluminum heat-dissipating base plate with screw terminals
Replaces / Cross-Reference Part Numbers
- SSR-40DA
- Replaces solid state relays with matching electrical specifications (3-32V DC control, 24-380V AC load, up to 40A)
Compatibility & Fitment
- Suitable for various AC load switching applications including PID temperature controllers, industrial automation, HVAC systems, and motor controls.
- Compatible with microcontrollers and PLCs that provide a 3-32V DC output signal.
- A heat sink is required for loads exceeding 10A to prevent thermal damage and ensure rated performance.
When to Replace
- Relay fails to activate the load when a control signal is present.
- Relay remains stuck in the "ON" position, keeping the load powered without a control signal.
- Unit overheats under normal operating conditions (with an appropriate heat sink).
- Visible damage, such as a cracked housing or corroded terminals.
Installation Tips
- Disconnect all power sources before installation or servicing.
- Mount the relay on a correctly sized heat sink, especially when switching loads greater than 10A.
- Apply a thin layer of thermal paste between the relay's metal base and the heat sink for optimal heat transfer.
- Connect control (input) and load (output) wiring to the correct terminals as marked on the device.
- Ensure all wire connections are secure to prevent arcing and overheating.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
Based on 16 reviews
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Product Reviews
★★★★★ 5
Great book
Format: Paperback
I LOVE THIS BOOK. It’s supper cute and fun. The art work is great and so is the writing. I couldn’t find anything wrong with the book.
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Reviewed in the United States on January 18, 2019
★★★★★ 5
Fabtastic!
Format: Paperback
Absolutely loved this. Definitely worth getting.
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Reviewed in the United States on May 19, 2023
★★★★★ 5
Sweet story with likable characters
Format: Paperback
This book is an easy, engaging read with two characters who feel real and fun to follow. I especially loved the gay characters and their storylines. They are written with warmth and honesty, and their relationship gives the book a lot of heart. The pacing moves well, and the mix of light and emotional moments keeps you pulled in. If you enjoy character driven stories with genuine charm, this is a great pick.
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Reviewed in the United States on November 20, 2025
★★★★★ 4
Such a fun book
Format: Hardcover
This was such a cute and quick read. I loved both Arthur and Ben's characters because they were so different, but just so great together. I can really relate to both of them - Arthur's high fast energy and Ben's constant doubt in himself. I especially loved watching how the two of them grew because of the other, without even realizing it.
Watching these two find each other and try to navigate the beginning of a relationship was so adorable and pulled my heartstrings. I love that it wasn't perfect or easy for them, which seemed so real. I also like that this book didn't just focus on this one relationship, but also contrasted to other relationships, both romantic and platonic of their friends. It shows that no relationship is predictable, easy or perfect.
The writing was wonderful and though Arthur and Ben's narratives were very distinct, I couldn't tell that this was written by two authors instead of one. The story flowed so nicely and had so many ups and downs that I was filled with emotion. Though this was not a "traditional" happy ending, it was still a happy one that had me smile. It was a bit open ended so I am content to imagine my own future for these wonderful characters.
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Reviewed in the United States on May 6, 2019
★★★★★ 5
Craigslist
Format: Kindle
This story brings love and part together and create something out of the ordinary. It shows the love for the world and how the world can bring two people close. I really think it shows that our future will be better. I would definitely read this book if you are into romance and New York City. Maybe this can happen to you!
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Reviewed in the United States on May 26, 2026