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Square black plastic frame 70 mm wide 15 mm deep with centre rotor and three wire lead

DELTA

DELTA AFB0712MB 70MM 12V 3300 RPM 3-Wire Fan

SKU CH-SPCV-64WN5

A 70 mm square DC fan spins at 3300 RPM, moves 28.18 CFM at 31.0 dBA and uses a ball bearing with a 3-wire speed sensor

  • 3300 RPM delivers 28.18 CFM airflow for component cooling
  • Ball bearing rated for long service life
  • Speed sensor (tach) enables motherboard RPM monitoring
  • 3-pin connector fits standard fan headers
  • Operates from 4.0 V to 13.8 V for voltage control

Compact 70 mm case fan

The DELTA AFB0712MB is a 70 mm square frame fan designed for tight chassis locations where larger units will not fit. It runs on 12 V DC and spins at 3300 RPM to move 28.18 CFM of air. The unit suits builders who need targeted airflow in small-form-factor or legacy systems.

Ball bearing with speed sensor

A ball bearing supports the rotor for consistent rotation over extended use. The three-wire termination includes a tachometer output so the motherboard or fan controller can monitor actual speed in real time. Rib-type counterbore mounting holes accept standard screws for secure attachment to case panels or heatsinks.

Operating range and connector

The fan operates between 4.0 V and 13.8 V, drawing 0.14 A typically and 0.24 A at maximum load for 1.68 W input power. Acoustic output is rated at 31.0 dBA at full speed. No additional cables, adapters or mounting hardware are included beyond the installed 3-pin lead.

How it compares

Measured against everything we stock in Heatsinks & Water Blocks, at today’s prices. Recalculated every night.

Price $13.99
Cheaper than about 60% of the 609 comparable items (median $15.99).

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Specifications

No published specifications for this item yet.

Questions about this item

What does the 3-pin 3-wire connector allow the motherboard to monitor?

The third wire carries a speed sensor signal so the motherboard can read the fan's 3300 RPM tachometer output.

What are the mounting hole dimensions and style for this 70 mm fan?

It uses a rib-type frame with counterbore holes on a 70 mm square, 15 mm thick profile.

How do you connect the 3-wire lead to a standard 4-pin PWM header without losing speed reporting?

Align the three pins with the header's ground, 12 V, and sense pins; the fourth PWM pin stays unused and the tach signal still works.

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