Overview: 50x50x20mm dual ball DC brushless blower fan

This model features a DC brushless external rotor motor design for stable operation and efficient performance. In some titles, the housing is shortened as “50x20mm” or written as “φ50×20mm”, but for the 5020 format the full size is commonly referenced as 50×50×20mm.

Need a quick method to select airflow vs. static pressure? See our internal guide: Cooling Fan Selection Guide.

Key specifications (Delefun B5020A)

For compact builds, a compact 50mm DC blower fan -10°C to 70°C PBT configuration is commonly selected where stable airflow is required in tight spaces.

Why choose the B5020A series?

Dual ball bearing for long-life stability

A dual ball bearing structure supports consistent operation under continuous duty and reduces maintenance frequency for professional environments.

Reliable insulation and materials

The B5020A blower fan for PC cooling Class A insulation setup helps ensure stable electrical and thermal performance across the stated operating range. PBT housing/impeller materials also support structural integrity for compact equipment cooling.

Typical applications

• PC cooling: compact mounts needing pressure-focused airflow
• Server racks: localized cooling where airflow resistance exists
• 3D printers: ducted cooling paths and enclosed builds
• Small enclosures: compact devices requiring stable ventilation

Related internal categories you may browse: DC Cooling Fan, EC Cooling Fan.

Request a quote / OEM support

For OEM sourcing, connector/cable customization, or bulk pricing, use: Request a Quote and Custom Service. For direct support, visit Contact Us.

Helpful references (authoritative external links)

Background knowledge for engineers and buyers: Centrifugal fan and Ball bearing.

FAQ

Is “50x20mm” the same as 50x50x20mm?

In many listings, “50x20mm” (or “φ50×20mm”) is used as a shorthand. For the 5020 standard format, the full size is commonly referenced as 50×50×20mm.

Is the B5020A suitable for compact PC cooling?

Yes. The 50×50×20mm form factor and pressure-focused blower design make it suitable for compact enclosures that need directed airflow.