DC Brushless Axial Fan 24V 12inch 305MM replace SPAL BBL338 - WBLF-1251-BS3400-V

Specification of WBLF-1251-BS3400-V replace SPAL381

1,The motor black wire connect the positive,Brown wire connect the negative . clockwise rotation
2,Axial clearance: 0.25mm Max;
3,Pressure test,:660VAC 1S 5mA;
4,Protection:IP68
5,Insulation class:H
6,Insulation resistance:20MΩMIN(500VDC)
7,Operaing temperture:-40-85℃
8,Humidity:0-100°
9,Operaing life:25000 hours Min
10,Vibration :20ms 5G
11,Rated voltage:24VDC Voltage Range:16-32VDC
12,30A Insurance in controller
13,Lead length:500±20mm,A blace∅8 PVCtube length 450
14,Power line model:UL1015 12AWG
15,Weight Approx:3Kg

Features of WBLF-1251-BS3400-V  replace SPAL381

It is 24V & suction aiflow & 3400rpm & 3300m3/h & IP68 & PWM control

Max Fan Speed	3550rpm
Min Fan Speed	2000rpm
Weight	2.2KG
Operating supply voltage rang	16V -32V
Operating working temperature range	-40°C - 85°C
Storage temperature range	-40°C - 120°C
Life time	up to 40000 hours depending on missing profile
Time from 0 rpm to max speed	8 seconds
IP grade	IP68

The drawing of dimension (mm) of WBLF-1251-BS3400-V  replace SPAL381

Airflow of WBLF-1251-BS3400-V  replace SPAL381

The yellow line is Current  &  The blue line is Airflow

PWM control diagram of WBLF-1251-BS3400-V  replace SPAL381

Product Picture of WBLF-1251-BS3400-V  replace SPAL381

Advantages of WBLF-1251-BS3400-V replace SPAL381

• Strong Suction & Cooling Capacity: Provides 3,300 m³/h airflow to efficiently remove heat under load.

• Brushless Durability: Durable motor design with minimal wear, enabling long-term reliable operation.

• High Protection (IP68): Fully sealed against dust and water, ideal for exposed, rugged environments.

• Wide Voltage Range: Supports 16V to 32V input, adaptable to many 24V systems.

• PWM Speed Control: Enables stepless speed adjustment to match cooling needs and save energy.

• Fast Start-Up: Accelerates from 0 to full speed in about 8 seconds for rapid cooling response.

• Easy Replacement Fit: Compatible mounting with SPAL BBL338 / BBL381 models, reducing upgrade complexity.

Application

Common usages include:

• Truck, bus, and commercial vehicle condenser / radiator cooling

• Construction machinery and industrial equipment

• Refrigerated transportation and cold chain units

• Thermal management in new energy systems (battery packs, inverters, chargers)

• Special vehicles (emergency vehicles, utility trucks, etc.)

Installation & Usage

• Mounting: Fix securely on radiator or condenser with proper clearance.

• Wiring: Red → +24V, Black → Ground, optional PWM → speed control.

• Airflow Check: Ensure suction direction matches system requirements.

• Testing: Power on, confirm smooth start-up and stable operation.

• Maintenance: Keep fan clean and inspect wiring regularly.

About Sunlight

Since 1990, Sunlight has specialized in manufacturing high-performance brushless fans and blowers. Certified with ISO9001 and IATF16949, our products meet CE, RoHS, and EMC standards. Widely applied in automotive, machinery, refrigeration and energy industries. Sunlight is committed to delivering quality, innovation, and reliable cooling solutions.

All fans undergo 100% testing before shipment, with customization and technical support available.

Certifications

EMC Certificate

CE certificate

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Ordering Information

Sample Lead Time: 14days

Mass Production: 21days

MOQ: 2

Customization: Voltage, control mode, wiring, housing treatment available

Contact Us:

Sunny Li: +86-18806140118 / sunny@sunlightmotor.com

Alisa Chen: +86-18806140198 / sales3@czsunlight.com

Frances Zhang: +86-18806140168/ sales1@czsunlight.com

Vicky Li: +86-18806140098/ sunlight@sunlightmotor.com 

FAQ:

Q: Which direction does it rotate?
A: Clockwise (viewed from the motor side).

Q: Is it usable on 12V?
A: No — designed for 24V systems (16–32V).

Q: What is its guaranteed lifetime?
A: At least 25,000 hours; in favorable conditions may reach ~40,000 hours.

Q: Can I adjust the speed?
A: Yes — PWM speed control is supported.

Q: Is it safe in rainy / dusty conditions?
A: Yes — IP68 rating. But avoid high-pressure jets or immersion.

Q: How to ensure it's a suitable replacement for SPAL BBL338 / BBL381?
A: Compare physical dimensions, mounting layout, airflow & voltage specs, and confirm electrical compatibility before ordering.