Centrifugal Blower

Blower 5020

Name: Blower 5020 Centrifugal Blower
Brand: Ruifengda

The Blower 5020 uses a forward-curved centrifugal impeller in a 50 × 50 × 20 mm scroll housing to deliver high static pressure through filters, ducts and dense heatsinks — the right choice where a same-size axial fan would stall.

Frame Size50 × 50 × 20 mm

Voltage12 V DC

Max Airflow≈ 26 CFM

BearingSleeve / One-ball / Dual-ball

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Product Overview

The Blower 5020 converts motor power into pressure rather than raw throw, making this 50 × 50 × 20 mm blower a natural fit for air purifiers, dehumidifiers and ducted electronics cooling.

Blower 5020 units are produced on our own winding and impeller-balancing lines in Shenzhen, then 100 % aging-tested before packing. Performance figures in the table reflect typical delivered values; we confirm exact curves against your enclosure resistance during sampling, and speed, voltage window or connector can be tuned at no tooling cost for standard frames.

Key Features

High static pressure output for filters, ducts and dense fin stacks
Forward-curved centrifugal impeller in UL94 V-0 plastic
Compact scroll housing with single or double inlet options
Ball-bearing versions for long life in any orientation
PWM speed control available on DC series
30 mm to 200 mm housing sizes to match your duct diameter

Note: Figures shown are standard-configuration values. Custom speed bins, voltage windows and bearing grades are quoted against your requirement.

Typical Applications

Laser & projector cooling Server / 1U-2U chassis Air purifiers & range hoods Heaters & heat pumps Ducted ventilation Power electronics with dense heatsinks

Full Specifications

Frame Size	50 × 50 × 20 mm
Rated Voltage	12 V DC (5 V / 24 V optional)
Rated Current	0.55 A (at rated voltage, max speed)
Speed	5,500 rpm (typical; PWM control 0–100 %)
Airflow	26 CFM / 44 m³/h (typical, free air)
Static Pressure	114 Pa / 11.6 mmH₂O (typical, max)
Noise	38 dBA at 1 m (max speed)
Speed Signal	Tach (FG) optional; PWM control optional
Bearing Type	Sleeve / One-ball / Dual-ball
Expected Life	40,000 h at 25 °C, 65 % RH (L10)
Operating Temp.	−10 °C to +70 °C (standard); −40 °C to +85 °C optional
Insulation Resistance	≥ 100 MΩ at 500 VDC
Dielectric Strength	500 VAC / 1 min (AC series: 1,500 VAC)
Frame & Impeller	UL94 V-0 PBT + fibreglass
Certification	CE / RoHS (UL on request)

Frequently Asked Questions — Blower 5020

When should I choose the Blower 5020 blower instead of an axial fan?

Choose Blower 5020 when the enclosure has high airflow resistance — dense heat sinks, filters or long ducts. A centrifugal blower keeps steady pressure at restrictive duty points where an axial fan of the same size would stall.

Which way does Blower 5020 discharge air?

Blower 5020 is a forward-curved centrifugal blower: air enters axially and discharges radially through the scroll outlet, so plan the duct or vent direction accordingly. Outlet orientation can be customized.

Can Blower 5020 run at 24 V instead of 12 V?

Yes, Blower 5020 is offered in 5 V / 12 V / 24 V DC windings with matching speed and current. The same frame can be tuned for your supply rail at no tooling cost.

How noisy is Blower 5020 in real equipment?

Rated noise is measured at 1 m in free air. Inside a ducted enclosure, expect 3–6 dBA more; a PWM curve or rubber mounting pads usually reduces perceived noise noticeably.