Whatsminer M20 / M20S / M21 / M21S Mini Silencer (300W or 400W) 140mm Adapter
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Whatsminer M20 / M21 Series Black Mini Standard Silencer – Compact AC Motor (Choose 300W or 400W) with Dedicated 140mm Exhaust Adapter
Quiet the legacy Whatsminer M20, M20S, M21 and M21S with the compact home pick. Black plastic, AC capacitor motor in your choice of 300W or 400W. Note: M20/M21 uses a linear 6pin fan connector (different from M30 and later). Bundle includes 140mm exhaust adapter + 2 × linear 6pin fan simulators. Heavy alternative? Silver Industrial version.
Choose Your Motor — 300W or 400W
300W AC motor: quieter, moderate ambient. 400W AC motor: higher airflow ceiling. Each motor has its own multi-position speed switch.
What's in the Box
- 1 × Black Mini Standard silencer (300W or 400W AC motor — your choice)
- Speed switch on motor
- Dedicated 140mm exhaust adapter for M20 / M21 series
- Power cable (US / EU / UK / CN)
- 2 × linear 6pin fan simulators (M20/M21-specific connector)
Pair with Additional Fan Simulators
- Whatsminer 6pin Fan Simulator for M20 / M21 Series
- 6pin Fan Simulator M20 / M21 Series – Hydro / Immersion
Install Workflow
Power off, unplug, remove 2 stock 140mm fans, plug linear 6pin fan simulator into each header, attach 140mm adapter to M20/M21 chassis, mate Black Mini outlet to adapter, power up, set speed switch mid-position, monitor temperatures.
Whatsminer M20 / M21 Series Black Mini Standard Silencer — Technical Specifications
| Parameter | 300W Variant | 400W Variant |
|---|---|---|
| Series | Black Mini Standard | Black Mini Standard |
| Motor | 300W AC capacitor | 400W AC capacitor |
| Speed Control | Multi-position speed switch | Multi-position speed switch |
| Air Volume | ~900 m³/h | ~1100 m³/h |
| Power | 300W | 400W |
| Voltage | 220V AC, 50Hz | 220V AC, 50Hz |
| Outlet | 150mm + 140mm M20/M21 adapter | 150mm + 140mm M20/M21 adapter |
| Target Miners | M20, M20S, M21, M21S | M20, M20S, M21, M21S |
| Stock Fan Architecture | 2 × 140mm, linear 6pin | 2 × 140mm, linear 6pin |
| Included | 2 × linear 6pin + 140mm adapter | 2 × linear 6pin + 140mm adapter |
| Power Cable | US / EU / UK / CN | US / EU / UK / CN |
| Condition | New | New |
Related Whatsminer Silencers
- Whatsminer M20 / M21 Series Silver Industrial Silencer
- Whatsminer M30 / M31S / M32 Legacy Black Mini Standard Silencer (next gen, square 4pin)
For bulk orders (10+ units) or 6pin simulator quantity quotes, contact us at contact@lys-sz.com.
Worldwide shipping from our Shenzhen warehouse. DDP delivery for USA & EU customers; rest of world ships from China with local customs on delivery.
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).
