Cooltron FD1751B12W5-76A-3SC1 172 x 150 x 51 mm 12 V DC Axial Fan, Dual Ball Bearing, PWM
Cooltron FD1751B12W5-76A-3SC1 172 x 150 x 51 mm 12 V DC Axial Fan, Dual Ball Bearing, PWM
Genuine Cooltron FD1751B12W5-76A-3SC1 12 V DC brushless axial fan in the 172 x 150 x 51 mm ("1751" / 17251) metal-frame industrial size. Die-cast aluminum frame, dual ball bearings rated for 70,000 hours, 238 CFM, and a 3-wire lead with PWM speed control. New, unused surplus stock from the original Cooltron factory cartons (bulk-packed, no individual retail box). Ships from Land O Lakes, Florida within 1 to 2 business days.
12 V DC ONLY. This fan needs a 12 volt DC supply (8–14 V DC). It will not run on 120 V / 240 V AC wall power and is not a 24 V or 48 V fan. The leads end in a small 3-pin connector; unless your equipment has the mating plug, expect to splice.
Wiring
The three leads are about 13 in (340 mm) long and end in a small white 3-pin connector. Red = +12 V, black = ground, blue = PWM speed-control input (optional). Per the Cooltron datasheet the fan runs at full speed with only red and black connected and the blue lead left open; add a 1–30 kHz PWM signal on the blue wire for variable speed. The blue wire is a control input, not a tachometer output; this fan does not report RPM. Plan on a supply rated for at least 3 A per fan to cover start-up current.
Specifications
- Model: Cooltron FD1751B12W5-76A-3SC1 (12 V member of the FD1751 dual-ball family)
- Size: 172 x 150 x 51 mm (6.77 x 5.91 x 2.0 in), rounded metal frame, 17251 footprint
- Mounting: 4 corner through-holes, 4.4 mm, on a 161.9 x 133.3 mm pattern; fits M4 or #8 screws
- Voltage: 12 V DC rated, 8–14 V DC operating range
- Power / current: rated 1.36–1.8 A (16.32 W nominal) per the Cooltron datasheet; the fan's own rating label shows 27.72 W (about 2.3 A), which we treat as the maximum when sizing a power supply
- Speed: 3,500 RPM at 12 V; PWM adjustable down to about 1,100 RPM at 20% duty
- Airflow: 238 CFM (405 m³/h) maximum
- Static pressure: 17.7 mm H2O (0.70 in H2O)
- Noise: 52.5 dB(A) at 1 m
- Bearings: dual ball bearing, 70,000-hour L10 life at 40 °C
- Frame: die-cast aluminum, painted black; 5-blade PBT (UL 94V-2) impeller
- Leads: 3 x UL1007 22 AWG, 340 mm, sleeved, with 3-pin connector
- Protection: auto restart after a locked rotor; reverse-polarity protected
- Operating temperature: -10 to +70 °C
- Weight: about 1.6 lb (735 g)
- Approvals: CE, cURus, RoHS. Made in China for Cooltron Industrial Supply.
Fits in place of
Other 172 x 150 x 51 mm / 17251 12 V DC fans of the same frame size, such as the Sanyo Denki 109E57 series, NMB 5920PL, Delta EFB1712, Orion OD172SAP-12, Mechatronics MA1751 and Sunon equivalents. Check your existing fan's voltage, hole pattern and wiring before ordering; 24 V and 48 V fans in this size look identical and are not interchangeable. This is an industrial cabinet fan, not a PC case-fan size. These part numbers are listed for size cross-reference only; Caster Supply LLC is an independent reseller of new, unused surplus stock and is not affiliated with Cooltron Industrial Supply or any of the manufacturers named here.
Typical uses
Power inverters, UPS and battery chargers, telecom and server cabinets, welders and plasma cutters, RF and audio power amplifiers, laser and CNC enclosures, solar battery boxes and other 12 V equipment.
Shipping and quantity pricing
- Free shipping anywhere in the United States, shipped within 1 to 2 business days from Land O Lakes, Florida. Multiple fans ship together in one box.
- 96 units in stock. Need 10 or more? Full factory cartons of 16 are available; request quantity pricing through our Bulk & Wholesale Quotes page.