JMC's 40x56 Counter-Rotating fan produces superior high-powered airflow in high-density electronic enclosures. JMC is a worldwide leader in DC fans, blowers, and heat sinks. www.jmcproducts.com

1. 40x40x56
Counter-Rotating
800.580.6688
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2. Looking for powerful airflow against high system impedence?
JMC has you covered.
JMC’s 40x56mm counter-rotating fan is ideal for high-density 1U servers and power sup-
plies or any other high-density electronic enclosures. Counter-rotating technology creates
extremely powerful and concentrated airflow while maintaining high efficiency and an out-
standing performance (PQ) curve.
JMC’s 40x56mm CR fan possesses the following attributes:
- 20,000 RPM - 3.1 Amps at 12 Vdc
- 40 CFM - Life data of 70,000 hours L10 at 40C
- 3.4 inches of H20 - 4 ball bearings
- 69 dBA - UL & TUV certified and 100% RoHS compliant
Features:
- Counter-rotation allows for much better performance than
standard tube-axial fan against high system impedance
- Pulse Width Modulation (PWM) available for both motors
independently or in parallel
- Of the following two features, one can be assigned to both
motors, or one of each can be applied by request:
- Tachometer output
- Locked rotor signal
800.580.6688
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3. JMC PRODUCTS, USA Phone: 800-580-6688 sales@jmcproducts.com , HK Phone : 852 2357 9930, TAIWAN Phone : 886 3 311 6987 asiasales@jmcproducts.com, CHINA Phone : 86 769 8707 9268 ext 281 sales@jmcproducts.com.cn
Revision History
RELEASED FOR PRODUCTION EC No REV Date Description Approvals
A 110857 B 3/14/12 Updt. PWM Curve JE
110880 C 2/19/13 Updt. Static Pressure JE
B C
F
Inlet Side NOTES
Exhaust
1.- THIS FAN AND ALL OF ITS COMPONENTS COMPLY WITH THE
Side REQUIREMENTS OF RoHS DIRECTIVE 2002/95/EC
2.- UTILIZATION OF VIBRATION ISOLATION GROMMETS OR
A B MOUNTS IS RECOMMENDED FOR FAN SPEED HIGHER THAN
2 15,000 RPM.
2.- RPM TOLERANCE IS +/-30% AT DUTY CYCLES BELOW 30%.
AT DUTY CYCLES BETWEEN 30% AND 100%, RPM TOLERANCE
CONVERGES LINEARILY TO 10%.
D E
G
20000
1
16000
All Dimensions in mm
H 12000
WIRE DESIGNATIONS A 40.0 +/- 0.5
WIRE COLOR FUNCTION B 32.0 +/-0.5 8000
Black GND C 56.0 +/- 1.0
Fan Speed (RPM)
Yellow PWR, +12Vdc D 4.8 +/- 0.3 4000
Green TACH E 4.0 +/- 0.3
Blue PWM F 8 X 3.5 +/- 0.3 0
G 300 +/-25 0 10 20 30 40 50 60 70 80 90 100
H 6.3 +/- 1.0 PWM Duty Cycle (%)
Frame Type
(Open Flange) VH PWM DUTY CYCLE vs. FAN SPEED
AIR INLET FAN
ITEM SPECIFICATION UNITS / NOTES
Speed 20000 +/- 10% RPM at 12 Vdc
Airflow 40.0 CFM in Free Air VL
Static Pressure 3.4 Inch, H2O 12V
1 REV DUTY CTCLE =
Bearing Type Dual Ball N/A t/T x 100%
Operating Temp (-)10 to 60 Deg C TACH OUTPUT 56K
CONTROL (PWM) 4.7K
MECHANICAL
Storage Temp (-)40 to 70 Deg C
Noise Level 68.0 dBA Max at 1M T
Blade Material UL 94V-0 N/A 4.7K
Frame Material UL 94V-0 N/A FAN
Wire Size 28.0 AWG 3.5 t
Wire Type UL 1061 N/A FRONT END PWM CIRCUIT
2.8
Wire Assembly Single Slot, Inlet and Exhaust N/A
PHYSICAL
Regulatory Approvals UL CUL TUV N/A 2.1 2 1 Logo Label L04005B0004 JMC
Net Weight 93.0 Grams 1 1 Fan Model 404056-12 JMC
Operating Voltage 10.8 - 12.6 Vdc 1.4 Item Qty Description Part Number MFG
Start up voltage NA Vdc
0.7
Start up PWM duty cycle 30 % Austin Texas, USA
Fan, 40x40x56 mm, 12Vdc
Rated Current 3.10 ( 3.60 Max.) Amp Dong Guan, PRC
Static Pressure (inch, water)
0 Dual Ball, Base Model
Input Power 37.2 ( 43.2 Max.) Watts Mechanical Engineer The Fan Company
0 8 16 24 32 40
Tach Output 2.0 Pulses/Rev S. Apsangi Size Drawing Number Rev
ELECTRICAL
Airflow Rate (CFM)
Polarity Protection Yes N/A Electrical Engineer A1 04005B0004 C
Motor Protection Auto-Restart N/A PQ CURVE J. Elmo Scale: None Sheet 1 of 1
PROPRIETARY NOTE
This document is the property of JMC products and contains sensitive and confidential information. Neither this document nor any information it contains may be reproduced or distributed, without written permission by JMC products.

4. Samples of this superior 40x56 Counter-Rotating fan
are available right now!
Ask for 04005B0004
Call 800.580.6688 or email sales@jmcproducts.com
About JMC Products
JMC is a thermal solutions provider with headquarters located in the beautiful city of
Austin, Texas. Application development and customer support reside in the Austin
headquarters, while manufacturing occurs at JMC’s Dong Guan, China 60,000 square ft.
facility. In addition, JMC has application centers in Europe and Taiwan. JMC sells its
products to major Original Equipment Manufacturers (OEM) in Europe, Asia and the
Americas. JMC focuses on developing and innovating high performance, reliable
air-moving devices that are utilized in consumer electronics, personal computers,
networking, storage and server applications. Our exceptional products and customer
support insure our customers always STAY COOL.
800.580.6688
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