EKF - Short Profile
EKF - Short Profile


CompactPCI® Serial • Board Mount Fan Unit

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CompactPCI® Serial • Board Mount Fan Unit

The SRF-FAN is a CompactPCI® Serial peripheral card, equipped with an 80x80x25mm long life fan, positioned for lateral airflow. Developed for demanding applications, the SRF-FAN can be inserted into the adjacent backplane slot e.g. of a CPU card or GPU board, in order to improve the overall heat dissipation. The provided fan has been chosen for extreme expected life (180,000h @60°C) and high airflow. It can be operated either permanently at maximum airflow, or pulse width modulated, controlled via I2C.

The fan is mounted to the PCB by special brackets for variable height positioning, thus minimizing the SRF-FAN board profile, and allowing optimized cooling of the targeted components. The SRF-FAN is scalable with respect to the maximum forced airflow, and for this purpose available with three different fans, from 1 to 2m3/min. The on-board PWM controller allows flexible configuration via the backplane I2C. The fan can be operated between 25-100% duty cycle, and its speed is permanently monitored.

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Feature Summary

  • General
    • Single size Eurocard 3U 4HP 100x160mm2
    • Suitable for CompactPCI® Serial peripheral slot (PCI Express® enabled)
    • Front panel width 4HP/8HP (total card space required will exceed 4HP with 25mm fan)
    • CompactPCI® Serial peripheral slot backplane connector P1 (+12V, I2C)
  • Fan
    • Long life, high airflow, aluminium frame
    • Dimensions 80mm x 80mm x 25mm
    • Rated voltage 12V, PWM input, tacho output
    • Operating temperature -20°C to +70°C
    • Expected life (L10) 180,000h @60°C
    • PWM duty cycle 25% to 100%
    • Three fan models available (1.03/1.54/2.07m3/min maximum airflow)
    • Fan mounting adjustable (variable depth/height below/between/above PCB)
    • Normal airflow direction from right to left side (board front view)
    • Fan can be reverse mounted for airflow direction from left to right
    • Custom specific fans 12V 80x80mm (height variable) on request
  • Special Features
    • On-board PWM controller ON Semi NCT7491
    • Integrated temperature sensor, overtemperature detection
    • Tacho monitoring
    • PWM automatic fan speed control
    • Option I2C control via backplane by CPU board
    • Front panel LEDs for status control
  • Applications
    • Selective hot spot prevention
    • System reliability enhancement
    • Heat dissipation improvement of adjacent high power cards e.g. CPU/GPU/FPGA
    • Upgrade of existing systems with respect to rugged environment
  • Environmental & Regulatory
    • Designed & manufactured in Germany
    • Certified quality management according to ISO 9001
    • Long term availability
    • Rugged solution (coating, sealing, underfilling on request)
    • RoHS compliant
    • Operation temperature 0°C to +70°C
    • Storage temperature -40°C to +85°C
    • Humidity 5% ... 95% RH non condensing
    • Altitude -300m ... +3000m
    • Shock 15g 0.33ms, 6g 6ms
    • Vibration 1g 5-2000Hz
    • MTBF tbd years
    • EC Regulations EN55022, EN55024, EN60950-1 (UL60950-1/IEC60950-1)

SRF-FAN - Simplified Block Diagram

SRF-FAN - Simplified Block Diagram
Ordering Information
Please refer to List 21 for popular SKU
EKF is an ISO-9001 certified company
EKF Elektronik GmbH • Philipp-Reis-Str. 4 • 59065 Hamm • Germany
Phone +49 (0)2381/6890-0 • Fax +49 (0)2381/6890-90 • E-Mail