Information

Product Portfolio for the Railway Sector
Literature No. 4-1773460-6 Dimensions are in millimeters Dimensions are shown for TE Connectivity / Berwyn, PA
Issued 3-11 and inches unless otherwise reference purposes only. For email, phone or live chat, go to: te.com/help
specified. Values in brackets Specifications subject
are standard equivalents. to change.
10
Type CFH Series
Derating Curve Surface Temperature Rise
Characteristics - Electrical
Dimensions
CFH350 CFH500 CFH750 CFH1100
Dissipation @ 25°C with Heatsink (Watts): 650 850 1300 1800
Without Heatsink: 350 500 750 1100
With Water Cooled Heatsink (40°C): 750 1000 1500 2200
Overload Rating (5s): 4000 5600 8000 12000
Ohmic Value (Ohms): R50 to 10K R50 to 18K R50 to 27K R50 to 27K
Tolerance: ±5% Standard
Maximum Working Voltage (DC/ACrms) Volts: 1500 2500 3500 4000
Insulation Resistance (Volts): >=10000MΩ
Dielectric Strength (AC peak) Volts: 4500 standard and 6000 special
Inductance (Henries): 5-50µH at 1000Hz 7-70µH at 1000Hz 10-100µH at 1000Hz 20-200µH at 1000Hz
Standard Heatsink Area (mm
2
): 1600 1600 1600 1600
Thickness (mm): 135 135 135 135
Protection Grade (IP): IP55
Heat Dissipation: Although the use of proprietary heat sinks with lower thermal resistance is acceptable, up rating is not
recommended. The use of proprietary heat sink compound to improve thermal conductivity is essential.
Type CFH350 CFH500 CFH750 CFH1100
L 110mm 160mm 220mm 320mm
P 60mm 110mm 140mm 240mm
L
P
30
71 95
82 ±2
0 100 200 300 400 500
2500
2000
1500
1000
500
0
Power (Watt)
Heatsink Temp. (°C)
CFH1100
CFH750
CFH500
CFH350
0 200 400 600 800 1000 1200 1400 1600 1800 2000
400
350
300
250
200
Temperature Rise (°C)
Power (Watt)
CFH750 CFH1100CFH500CFH350
The CFH is a high quality range of aluminium housed power resistors offering
environmental protection to IP55, 6kV dielectric strength, 1.8kW power dissipation,
and the ability to absorb electrical pulses of up to 24kJ.
The use of advanced materials in the construction of this device enables operating
temperatures of up to 450ºC giving very high power density.
Key Features
I 2200W in a 72cm
2
footprint
I Impressive pulse
capability
I No heatsink required
I Slimline casing
I Environmental
protection to IP55
Applications
I Balancing
I Capacitor charging
& discharging
I Crowbar
I Filter
I Inrush limiting
Rail brochure internal pages feb 11.qxd 17/3/11 13:11 Page 10