New-in-box Comair Rotron Major series AC tubeaxial fan, model MR77B3, part 19028309A (028309). 230 V AC, 50/60 Hz, 231 CFM, ball bearing, thermally protected.
$49.99 each
New in box 74 in stock
Check before you buy: This is a 230 V fan. Do not connect it to a 115 V supply; for 115 V equipment use the MR2B3.
Local pickup in Prosper, TX (Dallas–Fort Worth), or shipped.
| Brand | Comair Rotron |
|---|---|
| Series | Major |
| Model | MR77B3 |
| Part number | 19028309A (also listed as 028309) |
| Voltage | 230 V AC, 50/60 Hz |
| Current | 0.13 / 0.14 A |
| Power | 26 / 30 W |
| Airflow | 231 CFM (392 m³/h) |
| Static pressure | 0.769 in H₂O |
| Speed | 3,400 RPM |
| Noise | 56.6 dB(A) |
| Size | 171.4 × 150.4 × 50.8 mm (about 6.75 × 5.9 × 2.0 in) |
| Bearing | Ball |
| Construction | Aluminum frame, plastic blades |
| Protection | Thermally protected, motor class B insulation, for EN60950 |
| Approvals | cURus, CE, RoHS |
| Date code | Aug-26-22 |
| Condition | New in box |
| Brand or seller | Part number |
|---|---|
| Comair Rotron | MR77B3 / 19028309A / 028309 |
| DigiKey | CR135-ND |
The 115 V version is Comair Rotron MR2B3 (19028245A / 028245).
Cooling for 230 V equipment: UPS systems, server and telecom cabinets, industrial control panels, and machine tools.
230 V AC, 50/60 Hz. The 115 V version is the MR2B3 (19028245A).
It is Comair Rotron's part number for the Major series model MR77B3, also listed as 028309.
231 CFM (392 m³/h) at 3,400 RPM, with a maximum static pressure of 0.769 in H₂O.
Page updated 2026-10-02.