AABCOOLING AAB C21
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AABCOOLING AAB C21
- Adapter for 3-pin fans that reduces the supply voltage from 12 V to 9 V. Lowers fan speed and noise. Also fits 4-pin fans (without PWM control).
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3-pin fan adapter reducing voltage to 9 V
AABCOOLING AAB C21 is an adapter for fans with a 3-pin connector that reduces the supply voltage from 12 V to 9 V. The built-in resistor lowers the fan speed and therefore the noise level.

Key features
- Reduces fan supply voltage from 12 V to 9 V
- Lower fan speed and quieter operation
- Compact size: 24.6 × 8.1 × 6 mm
- Plugs in between the fan and the 3-pin header
Applications
The adapter is designed for fans and other PC components with a 3-pin connector. It also fits 4-pin fans – the automatic PWM speed control pin then remains unconnected.

Specifications
- Connectors: 1 × 3-pin (male), 1 × 3-pin (female)
- Power supply: 12 V DC
- Voltage reduction: from 12 V to 9 V
- Resistor: 56 Ω, 0.25 W
- Dimensions: 24.6 × 8.1 × 6 mm
In the box
- 1 × AABCOOLING AAB C21
- 1 × packaging
Brand
Entity responsible for this product in the EU
AAB Armanowski Spółka JawnaMore
ProducerAAB Armanowski Spółka JawnaAddress:
Polskiej Organizacji Wojskowej 14Postal code: 98-300City: WieluńCountry: PolandPhone number: +48438433303E-mail: info@aabcooling.com
Responsible entityAAB Armanowski Spółka JawnaAddress:
Polskiej Organizacji Wojskowej 14Postal code: 98-300City: WieluńCountry: PolandPhone number: +48438433303E-mail: info@aabcooling.com
Symbol
5907734796993
Producer code
5907734796993
Warranty
Overall dimensions
24,6 x 8,1 x 6 mm
Voltage drop
from 12V to 9V
Resistor
56 Ohm, 0,25W
Voltage
12 V DC
Connectors
3-Pin Male
3-Pin Female
24 months warranty
24 months warranty
Your previous questions regarding this product
What is the AABCOOLING AAB C21 3-pin fan adapter (12 V to 9 V) used for?
AABCOOLING AAB C21 is an adapter for fans with a 3-pin connector that reduces the supply voltage from 12 V to 9 V.
Does the AABCOOLING AAB C21 adapter make the fan quieter?
Yes. The built-in resistor lowers the fan speed and therefore the noise level.
What resistor does the AABCOOLING AAB C21 adapter have?
The AABCOOLING AAB C21 adapter has a built-in resistor: 56 Ω, 0.25 W.
Is the AABCOOLING AAB C21 adapter compatible with 4-pin fans?
Yes. It also fits 4-pin fans – the automatic PWM speed control pin then remains unconnected.
What are the dimensions of the AABCOOLING AAB C21 adapter?
The AABCOOLING AAB C21 adapter measures 24.6 × 8.1 × 6 mm.
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