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Description
TRACOPOWER TMR 3-0521 Isolated Board Mount DC/DC Converter, Regulated, 2 Output, 3 W, 5 V, 300 mA, -5 V, 300 mAThe TMR 3 series single dual output 3W isolated DC DC Converter with regulated output, featuring wide 2: 1 input voltage ranges. An excellent efficiency allows 40 to 85C operation temperatures. Further features include remote ON OFF control and continuous short circuit protection. The compact dimensions of this converter make it an ideal solution for many space critical applications. Fully regulated output voltage Small footprint High efficiency up to
The TMR 3 series single/dual-output 3W isolated DC/DC Converter with regulated output, featuring wide 2:1 input voltage ranges. An excellent efficiency allows -40 to 85�C operation temperatures. Further features include remote ON/OFF control and continuous short-circuit protection. The compact dimensions of this converter make it an ideal solution for many space critical applications.
- Fully regulated output voltage
- Small footprint
- High efficiency up to 85%
- Models with 1500 and 3000VDC I/O isolation (functional insulation)
Applications
Power Management, Industrial, Sensing & Instrumentation
Product details
| Output Power Max | 3W |
| Input Voltage DC Min | 4.5V |
| DC / DC Converter Mounting | Through Hole |
| Output Voltage - Output 2 | -5V |
| Output Current - Output 2 | 300mA |
| Depth | 21.8mm |
| Width | 11.1mm |
| Product Range | TMR 3 Series |
| DC / DC Converter Type | SIP |
| Approvals & Standards | - |
| Output Voltage - Output 3 | - |
| Output Voltage - Output 1 | 5V |
| Output Current - Output 3 | - |
| No. of Outputs | 2 Output |
| DC / DC Converter Output Type | Fixed |
| Input Voltage DC Max | 9V |
| Output Current - Output 1 | 300mA |
| Height | 9.2mm |
Other details
| Brand | TRACOPOWER |
| Part Number | TMR 3-0521 |
| Quantity | Each |
| Technical Data Sheet EN | |
| Technical Data Sheet EN | |
| Application Note EN |
All product and company names are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them. Image is for illustrative purposes only. Please refer to product description.
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
4.6 ★★★★★
Based on 2482 reviews
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Product Reviews
★★★★★ 1
Warped Wood
Color: Black Walnut
I know it's inexpensive, but regardless of the price of an item, it should do what it's meant to do somewhat effectively. The wood was warped and did not sit flat on my desk.
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Reviewed in the United States on April 22, 2025
★★★★★ 3
Great wrist rest, advertised dimensions slightly inaccurate.
Color: Black Walnut
Perhaps this is nitpicky but I purchased this wrist rest because it was perfectly sized to my keyboard at 29cm wide. It got here, and it's a fine wrist rest in terms of quality, material and feel, but it's not 29cm wide, it's 30.5cm wide. The other dimensions are accurate enough - both only .1mm off, but the mismatched width against my keyboard is enough for me to notice it and obsess over it. If that doesn't bother you, I say go for it. At $15 it's a good deal.
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Reviewed in the United States on May 30, 2026
★★★★★ 5
Long lasting
Color: Black Walnut
I’ve had this for two years and it still looks brand new after every day use. Love it.
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Reviewed in the United States on January 21, 2026
★★★★★ 2
Fairly priced but the finish leaves something to be desired
Color: Black Walnut
This wrist rest looks very nice, but I'd give the finish of the wood a C. There are a few rather rough patches, one that feels like it will develop into splinters eventually if it's not refinished. I'm using it for now, but I'm definitely going to refinish it at some point and it's inspired me to make my own wrist rests from scratch out of hardwood. I gave this two stars because it's very pretty and it's fairly comfortable to use. The wood used is pretty expensive, so I'd say that the price of this item is rather fair. I just wish they put a better finish on materials that are so nice.
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Reviewed in the United States on September 15, 2021
★★★★★ 5
Great black leather tray for top of dresser
Color: Black
Excellent item, better than described. Very nice leather inside base. Nice leather trim. Exactly what I was looking for. I give 5 stars 👍
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Reviewed in the United States on January 25, 2026