AC Axial Fan

A4028

Name: A4028 AC Axial Fan
Brand: Ruifengda

The A4028 connects directly to 110/220 V mains — no external PSU, no rectifier, fewer failure points. With its 40 × 40 × 28 mm frame it is a proven workhorse for machine cabinets, workshops and appliances that run all day.

Frame Size40 × 40 × 28 mm

Voltage110 V / 220 V AC, 50/60 Hz

Max Airflow≈ 11 CFM

BearingSleeve / One-ball / Dual-ball

Request a Quote → Ask for Datasheet

Product Overview

The A4028 runs directly from mains supply — no external driver needed — and its 40 × 40 × 28 mm metal-frame construction suits machine cabinets, welding equipment and workshop panels that run for long shifts.

Each A4028 is bench-tested after a complete aging cycle at our Shenzhen facility, and test records are retained by serial batch. Tell us your voltage, duty point and environment and the confirmed curve for your order will match the sample you approved.

Key Features

Direct 110 V / 220 V mains connection — no external power supply required
Impeller options in aluminium alloy or reinforced plastic
Dual-ball bearing versions for vertical mounting and long service life
Auto-restart and polarity-protected motor design for continuous duty
Terminal box or lead-wire connection options
CE certified; built to run 24/7 in dusty industrial environments

Note: Values above are typical catalogue figures at rated voltage, 25 °C. Final specification is issued with your order confirmation after we verify the duty point.

Typical Applications

Machine tools & machinery Distribution cabinets Welding equipment HVAC & ventilation Power supplies Kitchen & household appliances

Full Specifications

Frame Size	40 × 40 × 28 mm
Rated Voltage	110 V / 220 V AC, 50/60 Hz
Rated Current	0.12 A (at rated voltage, max speed)
Speed	2,700 rpm (typical)
Airflow	11 CFM / 19 m³/h (typical, free air)
Static Pressure	44 Pa / 4.5 mmH₂O (typical, max)
Noise	29 dBA at 1 m (max speed)
Bearing Type	Sleeve / One-ball / Dual-ball
Expected Life	30,000 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 — A4028

Does A4028 connect directly to mains power?

Yes. A4028 runs directly on 110 V / 220 V AC, 50/60 Hz — no external power supply or driver is needed, which simplifies wiring inside cabinets and appliances.

Can the speed of A4028 be adjusted?

AC fans run at a fixed speed determined by mains frequency. If you need variable speed, we can quote an EC version of the same frame size with 0–10 V or PWM control.

What capacitor does A4028 use, and can it be replaced?

A4028 uses a certified running capacitor matched to the winding. Replacements are available from us; we do not recommend third-party capacitors with different capacitance or voltage ratings.

Is A4028 suitable for continuous 24/7 operation?

Yes. A4028 is designed for continuous duty in machine cabinets, welding equipment and workshop panels, with 100 % aging test before packing and an expected L10 life of about 30,000–40,000 h.