When you see a code like 9GA0924P4G031, it can look random — but every character is chosen to specify the fan systematically. Read it correctly and you instantly know the frame size, voltage, control type, and thickness, without opening a datasheet.
Decoding it position by position
- 9GASeries — San Ace DC fan (9GA family)
- 09Frame size — 92 mm square
- 24Voltage — 24 V DC
- PControl — PWM speed control
- 4Thickness — 25 mm thick
- GSpeed code — Speed/performance variant
- 031Option — Lead-wire / connector / option variant
Series (the prefix)
The leading characters identify the fan family/series. The frame material (plastic or aluminium) varies by family, so confirm the material on the specific model’s datasheet.
| Code | Meaning |
|---|---|
| 9GA | San Ace DC fan (common family) |
| 9GV | San Ace DC fan (another family) |
| 9RA | San Ace DC fan (R series) |
| 9G / 9S / 9SG / 9HV | Other San Ace families |
| 109E | Legacy “109” numbering (different layout) |
Frame size
The next two digits are the square frame size in millimetres. A common gotcha: 09 = 92 mm (not 90).
| Code | Frame size |
|---|---|
| 04 | 40 mm |
| 06 | 60 mm |
| 08 | 80 mm |
| 09 | 92 mm |
| 12 | 120 mm |
| 17 | 172 mm |
Voltage, thickness & control
After the frame size come two voltage digits, then an optional P (PWM speed control; no P means a standard model), then a single digit for frame thickness. Note: the thickness codes are not in numeric order.
| Field | Code | Meaning |
|---|---|---|
| Voltage | 12 / 24 / 48 | 12 V / 24 V / 48 V DC |
| Control | P | PWM speed control (absent = standard) |
| Thickness | 1 | 38 mm |
| Thickness | 2 | 32 mm |
| Thickness | 3 | 28 mm |
| Thickness | 4 | 25 mm |
| Thickness | 9 | 10 mm |
Speed code & the tail
The next letter (e.g. G, J, M) is the speed/performance code, defined per model — generally a higher-ranked letter means higher speed within the same family, with the exact rpm on the datasheet. The trailing digits (e.g. 01, 001, 031, 0011) vary in length and encode the lead-wire / connector / option variant.
Caveat: on non-PWM models (no P) the order of the speed letter and the thickness digit can swap — e.g. 9GA0612G9001 is a 60 mm fan, 10 mm thick. So when there is no P, read the tail in context.
AC fans & other series
The scheme above applies mainly to San Ace DC fans. The legacy “109” numbering (e.g. 109E1724C501) and AC fans use a different layout, so for an exact match always cross-check the official Sanyo Denki catalogue.
