DF1203812B2UN Martech 12V 2.7A 12cm 4pin L7 S19 Cooling Fan 120mm

Maintain Optimal Temperature with the L7 S19 Cooling Fan

Ensure the optimal temperature and prevent overheating of your D7, L7, and S19 miners with the high-quality L7 S19 Cooling Fan DF1203812B2UN. This 12cm computer case cooler with a 4-pin connector is essential for maintaining the desired temperature of the inner components.

Efficient 4-pin Connector Cooling Fan for D7 L7 and S19 Miners

To ensure excellent air quality, it is recommended to use four fans with a 4-pin connector - two at the entrance and two at the rear of the unit. The L7 S19 Cooling Fan is designed to provide efficient cooling and promote proper airflow.

With its reliable performance and durable construction, this cooling fan from MARTECH is the perfect solution for your mining needs. Its 120x120x38mm size makes it suitable for various mining setups. The 2.7A current rating and 12V voltage rating ensure sufficient power for effective cooling.

DF1203812B2UN Fan Technical Features:

Installation guidance for L7, D7 and S19 enclosures

For balanced airflow, run four DF1203812B2UN fans per miner — two on the intake side, two on the exhaust side — and align all four to the same rotation direction. If you replace only one or two fans, match the existing units to keep static pressure and acoustic profile consistent. The 4-pin connector plugs straight into the original fan headers on the control board, with no soldering or firmware change required.

Compatibility

Designed for Antminer L7 (Litecoin / Dogecoin Scrypt), D7 (X11) and S19 series air-cooled SHA-256 miners. The same 12V/2.7A 120x38mm form factor is widely used across Bitmain enclosures, so the DF1203812B2UN also works as a generic 12V high-RPM replacement when matched to an existing 2.7A fan slot. Always confirm voltage, current and connector orientation against the fan you are removing before installing.

Common failure symptoms

• Miner reports "fan error" or specific fan number in the dashboard log
• Hashrate drops or auto-shutdown during warm ambient hours
• Audible bearing noise, rattle or clicking from one fan position
• One fan visibly spinning slower than the other three
• Hashboard temperature alarm even with clean filters and clear airflow path

Frequently asked questions

Will the DF1203812B2UN fit my Antminer S19j Pro / S19 XP?

Yes, the 120x120x38mm form factor and 4-pin connector match the original fan slot on the S19 family. Confirm the part number printed on your existing fan before ordering.

Can I mix this fan with a different 12cm model?

It is not recommended. Mismatched RPM and static pressure create uneven airflow across the hashboards and can trigger fan-mismatch warnings in the firmware. Replace all four fans with the same model for best results.

Does the fan come with a connector adapter?

The fan ships with its standard 4-pin connector. If your miner uses a different header pinout, contact us for an adapter cable kit.

Do you ship internationally?

Yes. We ship worldwide from our Shenzhen warehouses, with DDP available for US and EU customers.

Related products

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• Antminer L7 200W Silencer
• Antminer S21 / T21 Fan Speed Simulator
• 4-in-1 Fan Speed Simulator for Antminer / Iceriver

Contact contact@lys-sz.com for volume pricing or compatibility questions.

Worldwide shipping from our Shenzhen warehouses.