TH3D True 25A AC/DC SSR for AC Heated Bed
$9.99
- Control your AC bed with a SSR just like your stock bed!
- 100% Compatible with our EZABL kit – Tested to work
- Handles up to 25A AC Current
- Can be operated on 3-32V DC
- Works with a Raspberry Pi GPIO – Tested to work by TH3D
- Comes with safety cover for SSR
In stock
Printer Compatibility Notes
- TEVO Tornado – Upgrade the low quality Tornado SSR to eliminate interference with ABL sensors
- Direct replacement for Tornado SSR
- CR-10S Pro/MAX – This does NOT work with the CR-10S Pro or CR-10S MAX, these printers use a DC SSR
- Use our MOSFET + 12GA Wire Set for these machines
Technical Specifications:
| Load Current | 25A |
| Load Voltage  (Output Voltage) | 24-480VAC |
| Control Voltage  (Input Voltage) | 3-32VDC |
| Control Current | DC 3-25mA |
| ON Voltage | ≤1.5V |
| OFF Leakage Current | ≤2mA |
| Reaction time | ≤10mS |
| Dielectric Strength | 2500VAC |
| Insulation Resistance | 1000MΩ/500VDC |
| Ambient Temperature | -30 to 80 C deg |
| Status Indicator | LED |
Teardown Pictures
While we have awesome suppliers we always check that what we’re getting is correct. Below are pictures from our teardown of these SSRs. Inside is a Triac rated for 25A, usually a JST24A or BTA24 part. Unlike other sellers out there we make sure we are getting you correct and safe products, especially on parts that handle mains voltage that can be fatal if not correctly used.
These are generic SSRs from one of our suppliers that we have been using for years and we check each batch to ensure that they contain the proper chips inside to support the advertised load ratings.
Full Wiring Diagram using 15A Breaker for extra safety
Warranty Information
3 Months Warranty -Â Our warranty covers any and all defects with the product. If your product fails or has problems within the warranty period you can contact our support team by using the Contact Us link.
Damage/Failure due to improper installation, improper usage, failure resulting from an issue with the machine the product is installed on, 3rd party products connected to our product, and/or modification of the product are not covered under warranty.
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Question
John Kalaigian –
Hello, curious to know if this SSR is a worthy mate for a Keenovo 120V 750W pad for my CR-10S. Thanks!
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Tim Hoogland –
Yes it will! We’ve even used them on the 1500W S5 heaters. It handles it with no issue.
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Rob Semenoff (verified owner) –
What gauge wire should be used?
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Tim Hoogland –
Depends on how many amps your bed pad uses. Typically 14 gauge would be used for up to 15A current draw and will cover anything under 15A as well. I would not recommend using anything lower than 16 gauge for an AC bed. If you want to be sure what gauge to use contact the manufacturer of the heated bed pad and see what they recommend. We only sell the SSR, not the pads. The SSR is rated for up to 25A current which is more than enough for the heated bed pads used on 3D printers.
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Question
Jennifer Bonnette (verified owner) –
I plan on using this SSR with an AC heated bed for my CR-10 S4. Does this SSR need a heat sink?
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Tim Hoogland –
If using it at under 15A you can just mount it to a metal surface like the printer extrusion or a case. Above 15A we recommend you use a heatsink on it.
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Question
Mark Thompson –
Can this SSR be used with PID bed temp control?
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Tim Hoogland –
Yes, it can. They work prefect with PID temp control.
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