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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.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
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 ★★★★★
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Product Reviews
★★★★★ 5
Awesome bra!
This bra is so comfortable. I love the fact that you can adjust the straps and the front to make it fit a short person's torso. This bra lifts and so far, has not stretched out.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 21, 2026
★★★★★ 4
Soft and Comfortable
Size: 46D, Color: Black
Size 46 D, black. Very Comfortable ! The strap adjustments are in front so it would be easy for someone who needed a caregiver to help them dress. The cups fit well with no gaps or wrinkles and the back lays smoothly, with no irritating seems or crossovers. The chest band is one piece, so no irritating seams, and its a little more supportive than my usual at home or bedtime bras. I tried it on and decided to wear it an hour to see if it stayed comfy while I moved around the house. It was so comfortable I forgot to change it! I ordered the black and when I machine washed it there was no dye bleeding. Hung to dry. Wearing it again and I think it just might become my new favorite. If I still love it, I might purchase another color in next month's shopping budget.
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Reviewed in the United States on February 2, 2026
★★★★★ 5
Extremely Comfortable
This bra is the most comfortable bra I have worn. It is so comfortable it doesn't even feel like I am wearing a bra. There are no unfinished seams inside. I like the fact the shoulder straps are hook and eyes that don't slip like the conventional straps. This bra is reasonably priced and nicely made with good support.
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Reviewed in the United States on January 29, 2026
★★★★★ 1
DELMIRA BRAS
Size: 36DD, Color: Gentle Rose
I don’t care for this bra whatsoever. The material is very cheap, has no support and in a nutshell, it’s one of those bras you can wear to bed if you’re not feeling comfortable going to bed braless. The price ($19.99) is very high for this bra. It’s definitely not made well or worth the price. I’ll never buy from Delmira again.
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Reviewed in the United States on February 23, 2026
★★★★★ 5
The most comfortable bra I’ve ever had
I have been searching for a comfortable bra in my large size that I can just pull on over my head. This bra has so many pluses for my needs! The design and construction are impressive for any price, and the fabric is pleasant on my skin. I’m having shoulder surgery soon and was so pleased to find I can easily unhook (and rehook) a strap to accommodate the surgical site as it heals. Even so, there’s decent support, which was not a concern but is a pleasant surprise. I wish there were more available, especially in soft colors, but at least I have 3.
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Reviewed in the United States on February 1, 2026