HA1250H12SB-Z 120mm Fan 12V 9A – Cooling Fan for Avalon 1346 / 1366 / 1466 / 1566
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HA1250H12SB-Z 120mm Cooling Fan | 12V / 9A Dual-Interface Replacement for Avalon 1346 / 1366 / 1466 / 1566
The HA1250H12SB-Z is a 120 × 120 × 50 mm high-performance cooling fan for Avalon 1346, 1366, 1466, and 1566 ASIC miners. Direct replacement when the original chassis fan locks up, gets noisy from bearing wear, or trips the miner into thermal protection. 12V / 9A operation delivers strong airflow + static pressure for the dense Avalon hashboard heatsink stack.
Distinctive design feature: dual fan interface — one physical fan exposes two connectors, letting it pair into the Avalon chassis cabling without adapter cables. The 50mm-thick profile (vs the standard 38mm) gives the fan extra blade depth, which raises static pressure for better penetration through the heatsink fin stack at the rated 9A current draw.
When to Replace the Fan
- Avalon fan stopped spinning — bearing seized, miner trips OTP on first sustained load.
- Audible ticking or grinding from the chassis — bearing wear, replace before full seizure.
- Fan running but tach reads zero — broken tach wire or hall sensor in the fan body.
- Dust-clogged blades after extended shed duty — cleaning doesn't restore balanced airflow.
- Thermal-shutdown logs during hot-weather hashing — original fan no longer hitting rated airflow at high ambient.
HA1250H12SB-Z Specifications
| Parameter | Specification |
|---|---|
| Part Number | HA1250H12SB-Z |
| Type | Cooling fan (chassis-mount) |
| Dimensions | 120 × 120 × 50 mm |
| Voltage | 12V |
| Current | 9A |
| Connector | Dual fan interface (one fan, two connectors) |
| Mounting Type | Chassis installation |
| Compatibility | Avalon 1346 / 1366 / 1466 / 1566 |
| Use Case | Mining-farm sustained 24/7 duty |
| Weight | ~0.50 kg |
| Condition | Brand New |
FAQ — HA1250H12SB-Z Cooling Fan
Q: Match the original wire colours, or just power + GND?
A: Match all four. Power and GND alone will spin the fan, but the Avalon firmware reads tach feedback and PWM and will trigger fan-failure errors or shutdowns if either is missing. Confirm pinout against the original fan before swapping connectors.
Q: Dual fan interface — do I need to connect both connectors?
A: Yes. The dual-interface design means the single physical fan presents two electrically distinct connectors, both expected by the Avalon control board's fan-monitoring logic. If only one is connected, the firmware will flag a missing fan and either throttle or refuse to start hashing.
Q: Mount direction — blow into the chassis or extract?
A: Follow the airflow arrow printed on the fan housing and match the original orientation. Avalon chassis cooling is designed for a specific airflow path through the hashboards; reversed orientation kills the cooling efficiency.
Q: Bulk pricing for Avalon fleet maintenance?
A: Yes — email contact@lys-sz.com for case-quantity HA1250H12SB-Z pricing.
Related products
- Avalon PSU 3300W (A1066 / A1166 / A1246)
- Avalon A1466 Water Cooling Plate Kit
- HA4028M12SB-Z 4cm Avalon PSU Fan
- Avalon PSU Fan Simulator (Noise Reduction)
Avalon fleet operators stocking HA1250H12SB-Z 120mm fans by the case? Email contact@lys-sz.com for bulk pricing. Worldwide shipping from our Shenzhen warehouse.
Shipping & Customs
🇺🇸🇪🇺 USA & European Union (DDP):
Orders are delivered DDP (Delivered Duty Paid). All customs duties, import taxes, and fees are included — no additional charges on delivery.
🌍 Rest of world:
Orders ship from China. Depending on your country, local customs authorities may apply import duties or taxes. Any such fees are set by your local authorities and are not included in the product price.
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).
