DBTB0428B2U 4cm Cooling Fan for Power Supply Unit
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DBTB0428B2U 40mm AVC PWM PSU Cooling Fan – 12V / 0.48A
Experience reliable cooling for power supply units with the DBTB0428B2U high-performance cooling fan from AVC. Designed specifically for power supply units, this 40mm (4028) 4-wire PWM temperature-controlled fan delivers sufficient cooling air volume and air pressure to ensure optimal operating temperatures across mining PSU and industrial SMPS applications.
Operates at 12V DC with 0.48A current draw, equipped with maintenance-free double ball bearings — long service life and reliable performance under continuous 24/7 mining load. PWM intelligent temperature control + speed measurement enables dynamic speed adjustment based on PSU thermal state — efficient cooling without unnecessary noise during lower-load periods.
Typical Use in Mining PSU Repair
- Failed bearing replacement — audible bearing noise indicates worn fan.
- Throttling recovery — restoring proper PSU airflow after thermal issues.
- Pre-emptive maintenance — replacing aging fans before failure during scheduled service.
- Production refurbishment — bulk fan inventory for PSU rebuild lines.
- General 40mm 12V PWM fan applications — server / industrial / industrial PSU cooling.
DBTB0428B2U Specifications
| Feature | Specification |
|---|---|
| Brand | AVC |
| Model | DBTB0428B2U |
| Size | 40 × 40 × 28 mm (4028) |
| Voltage | 12V DC |
| Current | 0.48A |
| Wire Count | 4-wire (PWM + Tachometer) |
| Control | PWM intelligent temperature control + speed measurement |
| Bearing | Double ball bearing (maintenance-free) |
| Typical Use | Mining PSU / industrial SMPS / server cooling |
| Condition | Brand New |
FAQ — DBTB0428B2U PSU Fan
Q: 4-wire PWM vs 2-wire — which do I need?
A: 4-wire PWM includes PWM control + Tach feedback. Use when your PSU has a 4-pin fan header expecting PWM speed control + RPM feedback. For simple 2-pin PSU headers, use a 2-wire fan instead (or wire the PWM/Tach lines as needed).
Q: Will this fit my specific PSU model?
A: The 40×40×28mm form factor + 12V DC is standard across many mining and industrial PSU designs. Verify physical dimensions and connector type against your PSU's existing fan before ordering — connector pinout / orientation must match.
Q: How long do ball-bearing fans last vs sleeve bearings?
A: Double ball-bearing fans typically last 50,000-100,000 hours of 24/7 operation — roughly 2-3× sleeve bearings. For mining-utilization, ball bearings are the preferred choice despite slightly higher cost. Expect 5-10 years of service life with proper airflow / dust management.
Q: Bulk pricing for PSU repair shops?
A: Yes — email contact@lys-sz.com with your monthly volume for tier pricing on DBTB0428B2U stock.
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PSU repair shops stocking DBTB0428B2U by the case? Email contact@lys-sz.com for bulk pricing. Worldwide shipping from our Shenzhen warehouses.
Buying in bulk for a mining farm or repair shop?
Get dedicated B2B pricing on this part and across our full catalog — quote response within 24 hours, payment by T/T USD bank wire, and DDP delivery available for US & EU customers (and other lanes on request).
