ARCTIC P12 Pro Reverse 120mm PWM Fan Black - 500-3000 RPM, FDB
ARCTIC
ARCTIC P12 Pro Reverse 120mm PWM Fan Black - 500-3000 RPM, FDB
The ARCTIC P12 Pro Reverse is a 120 mm PWM fan with its blades running the other way — part ACFAN00331A, supplied as a single fan with a cable splitter. It covers 500 to 3000 rpm with a true 0 rpm mode below 5% PWM, moves 73 CFM at 4.5 mmH₂O, and runs on a fluid dynamic bearing with a six-year warranty.
Why this product
Reverse blades — the finished face points outward
On a standard fan the tidy side is the intake side, which ends up hidden. These run the other way, so the finished face shows through the window while the fan draws its air from behind.
500–3000 rpm with 0 rpm mode
A wide PWM range, and ARCTIC stops the blades completely below 5% PWM — genuinely silent at idle rather than just quiet.
73 CFM at 4.5 mmH₂O
Serious static pressure for a 120 mm fan, which is what makes the P series work on radiators, mesh panels and dust filters rather than only in open air.
PST daisy-chaining built in
A second 4-pin socket carries the PWM signal through to the next fan, so a row of them runs from a single motherboard header on one shared curve.
Fluid dynamic bearing, six-year warranty
An FDB rather than a sleeve bearing, with ARCTIC covering it for six years.
- Part numberACFAN00331A
- Pack quantity1 fan
- Size120 × 120 × 27 mm
- ColourBlack
- Speed500–3000 rpm, PWM, 0 rpm below 5%
- Airflow73 CFM
- Static pressure4.5 mmH₂O
- Warranty6 years
- SKUARC-3530
- EAN4895265000690
- Standard 120 × 120 × 27 mm frame, fitting any 120 mm case, radiator or cooler mount.
- 4-pin PWM fan plug plus a 4-pin socket for PST daisy-chaining, with a 400 mm cable and an 80 mm daisy-chain lead. Pins are GND, +12 V DC, tachometer and PWM.
- 12 V DC with a 3.5 V start-up voltage and 0.4 A draw.
- One fan and four mounting screws are supplied.
- This is the plain P12 Pro Reverse. ARCTIC sells a P12 Pro Reverse A-RGB as a separate part if you want lighting — this one has none.
- ARCTIC publishes no noise rating for this model.
- Rated for an ambient operating range of 0–40 °C.
Best for
- Glass-panel builds where a rear or top fan would otherwise show its motor hub to the window.
- Radiators, mesh panels and dust filters, on 4.5 mmH₂O of static pressure.
- Machines that should be inaudible at idle and still have 3000 rpm in reserve.
- Building up a row of fans on one header, through PST daisy-chaining.
Trade-offs
- RGB builds: this fan has no lighting. ARCTIC's P12 Pro Reverse A-RGB is the model with LEDs.
- Conventional airflow layouts: these are reverse-blade fans. For a normal front-intake position, the standard P12 Pro is the right fan.
- Buyers who need a quoted noise level: ARCTIC publishes no dB(A) or Sone figure for this model.
- Filling a case in one purchase: this is a single fan. ARCTIC sells a three-pack under a separate part number.
The ARCTIC P12 Pro Reverse is a 120 mm PWM fan built the other way round — part ACFAN00331A.
On an ordinary fan the attractive, finished face is the intake side. Mount one at the rear or top of a case and what shows through the glass is the bare motor hub and its support struts. A reverse-blade fan flips that: the finished face points into the case while the fan still draws air from behind it, so the build looks right without fighting the airflow direction.
It runs on PWM from 500 to 3000 rpm, and ARCTIC stops the blades entirely below 5% PWM — an idle machine is silent, not just quiet. Airflow is 73 CFM at 4.5 mmH₂O, which is a strong pressure figure for 120 mm and is what lets the P series work on radiators and behind dust filters rather than only in open air.
A second 4-pin socket carries the PWM signal through to the next fan, so several run from one header on a shared curve. The bearing is fluid dynamic, and ARCTIC covers it for six years. One fan and four mounting screws are supplied.
Two things worth being plain about: this model has no lighting — ARCTIC's P12 Pro Reverse A-RGB is the one with LEDs — and ARCTIC publishes no noise rating for it, so we are not going to quote one.
General
| Brand | ARCTIC |
|---|---|
| Model | P12 Pro Reverse |
| Part number | ACFAN00331A |
| EAN | 4895265000690 |
| UPC | 840033403368 |
| Colour | Black |
| Pack quantity | 1 fan |
| Blade direction | Reverse (5 blades) |
Performance
| Fan speed | 500–3000 rpm, PWM controlled |
|---|---|
| 0 rpm mode | Yes — stops below 5% PWM |
| Airflow | 73 CFM / 124 m³/h |
| Static pressure | 4.5 mmH₂O |
| Bearing | Fluid dynamic bearing |
| Noise | Not published by ARCTIC |
Electrical & Connection
| Connector | 4-pin PWM plug and 4-pin socket (PST daisy-chain) |
|---|---|
| Pin assignment | GND, +12 V DC, tachometer, PWM |
| Voltage | 12 V DC (typical) |
| Start-up voltage | 3.5 V |
| Current | 0.4 A |
| Cable length | 400 mm, plus 80 mm daisy-chain lead |
Physical
| Fan dimensions | 120 × 120 × 27 mm |
|---|---|
| Net weight | 167 g |
| Packaging | 127 × 125 × 32 mm, 201 g gross |
| In the box | 1 fan, 4 mounting screws |
| Operating ambient | 0–40 °C |
| Warranty | 6 years |
Shipping
All our products are shipped from the United Kingdom within 24 to 48 hours of purchase. See our Shipping and Returns page for full details.
Returns
- Tech Syndicate offers a full money-back guarantee on all purchases made in our store. If you are not satisfied with your purchase, we will provide a full refund, no questions asked.
- Refunds are available within 45 days of delivery.
- After the 45-day period you are no longer eligible for a refund, so we encourage you to try the product within the first few weeks to make sure it fits your needs.