Many people select fans only by cutout size — "as long as it fits" — only to find the cabinet still overheats and trips. Selecting cabinet cooling fans should not be based on dimensions alone: you also need to consider airflow, static pressure, power supply, protection rating, and control. Browse more products: AC axial fan product list.
Don't Just Look at the Cutout Size
Dimensions determine "if it fits", not "if it cools enough". For the same 12038 cutout, you can install a cheap 80CFM fan or a high-RPM 180CFM model — the cooling performance differs by more than 2x.
5 Key Selection Parameters
| Parameter | Why It Matters | How to Choose |
|---|---|---|
| Cutout Size | Determines if it fits | Match the existing hole: 12038/17251 etc. |
| Airflow | Determines cooling capacity | Calculate based on heat load, leave 20% margin |
| Static Pressure | Maintains airflow with filters/ducts | Choose high-pressure model if using filters |
| Power Supply | AC/DC cannot be mixed | Control cabinets usually AC220V, PLC cabinets may be DC24V |
| Protection Rating | Dust/water protection for workshop/outdoor | Workshop IP54, outdoor IP55 |
Recommended Configurations by Cabinet Type
| Cabinet Type | Recommended Fan | Quantity |
|---|---|---|
| Small PLC cabinet (<600mm) | 12038 AC | 1 unit |
| Medium control cabinet (800-1200mm) | 12038 AC × 2 | One in, one out |
| Large power cabinet (>1600mm) | 17251 AC × 2 | One in, one out |
| Outdoor energy storage cabinet | 17251 EC × 4 | IP55 + PWM speed control |
Not sure which one to choose? Send us your cabinet dimensions, components inside, and ambient temperature — we'll help you select for free. Or contact us for selection support.
Frequently Asked Questions
If the cutout size is the same, can I swap any fan?
No. Fans of the same size can vary greatly in airflow and pressure, and the power supply may differ (AC/DC). Before swapping, confirm that voltage, airflow, and static pressure all meet requirements — otherwise you'll get overheating or power mismatch.
The cabinet already has fans but still overheats — what should I do?
First check if the airflow path is short-circuited (exhausted hot air being sucked back in), then check if the filter is clogged, and finally check if the fan airflow is insufficient. Troubleshoot step by step — don't just replace with a bigger fan.
Can I swap a 220V fan for a 24V fan?
No. 220V is AC, 24V is DC — wrong wiring will burn out the fan immediately. Control cabinets are usually 220V; PLC/instrument cabinets may be 24V DC. Always double-check.
How many fans do I need?
Small cabinets may be fine with one fan. For larger cabinets, we recommend one intake and one exhaust fan to create cross-flow — much better cooling than both fans on the same side.
Can JIEFENGFAN provide a complete set for my cabinet?
Yes. Send us your cabinet dimensions and heat load, and we'll supply the matched set: fan + filter + louver, with cutout dimensions drawn for you.