Wathai
40mm x 20mm 12V Dual Ball Bearing DC Brushless Cooling Fan for 12 Volt PSU Replacment, DIY Small Electronic Equipment Cooling
*Price sourced from Amazon.com. Last updated 2026-05-24. Price and availability subject to change.
SpecPicks Verdict
SpecPicks classifies Wathai 40mm x 20mm 12V Dual Ball Bearing DC Brushless Cooling Fan… as a solid pick with broad community endorsement in the power supplies category, based on 446 verified Amazon reviews and our ranking model that weights rating × review-volume × price-fit. Wathai's positioning sits comfortably above the category median. Use the Compare tool to put it side-by-side with two or three close alternatives before clicking through to Amazon.
Common buyer scenarios for power supplies of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.
Pros & Cons
Pros
- ✓ Solid 4.4★ customer rating
- ✓ Backed by Wathai's warranty and support channels
- ✓ Ships via Amazon with Prime eligibility and the standard returns policy
Cons
- ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
- ✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified
Key Features
- 40x20mm size fan for replacing fans in inverter and storage equipmentcs such as PSU，battery charger, 3D printer, switches, NAS , DVRs etc
- The 40mm DC brushless fan operates at 12V, ideal for cooling electronic equipment. This compact 40x40x20 12V fan ensures efficient cooling for various electronics, making it a reliable choice for 12V cooling needs
- Dual ball bearing providing reliable performance for prolonged periods with a lifespan of 50,000 hours
- Rated Voltage:12V 0.05A; Speed: 6000RPM; Air flow: 7.85CFM; Noise:26dBA; Connecter: XH2.54-2Pin; Cable Length: 20cm Or 8 inche
- 1 Piece fan and mounting screws & nuts; Dimension: 40mm(L) x 40mm(W) x 20mm(H) / 1.58x1.58x0.79 in. per fan
Full Specifications
| Brand | Wathai |
|---|---|
| Model | 4020B12V2P2.5 |
| Voltage | 12 Volts (DC) |
| Material | Plastic |
| Dimensions | 1.58x1.58x0.79 in |
| Unit Count | 1 Count |
| Noise Level | 26 Decibels |
| Part Number | 4020B12V2P2.5 |
| Material Type | Plastic |
| Rated Voltage | 12V 0.05A; Speed: 6000RPM; Air flow: 7.85CFM; Noise:26dBA; Connecter: XH2.54-2Pin; Cable Length: 20cm Or 8 inche |
| Cooling Method | fan cooling |
| Number of Items | 1 |
| Air Flow Capacity | 7.85 Cubic Feet Per Minute |
| Compatible Devices | Amplifier, Desktop, Gaming Console, Printer, Projector |
Ready to buy?
Wathai 40mm x 20mm 12V Dual Ball Bearing DC Brushless Cooling Fan for 12 Volt PSU Replacment, DIY Small Electronic Equipment Cooling is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-05-24. Price and availability subject to change.
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