Aluminium Housed Power Resistors
Type CFH Series
Type CFH Series
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
■ 2200W in a 72cm2
footprint
• Unparalleled power
density of 31W/cm2
■ Impressive Pulse
Capability
• Large active element
can absorb up to
24kJ
■ No Heatsink Required
• Dissipates up to
950W in free air
■ Slimline Casing
• 30mm casing height
for design flexibility
■ Environmental
Protection to IP55
• Reliable in the
harshest conditions
Characteristics -
Electrical
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 Min (Ohms):
0R5
0R5
0R5
0R5
Max:
10K
18K
27K
27K
Tolerance:
±5% Standard
Maximum Working Voltage (DC/ACrms) Volts: 1500
2500
3500
4000
Insulation Resistance (Volts):
>=10000 MΩ
Dielectric Strength (AC peak) Volts:
4500 standard and 6000 special
Inductance (Henries):
5-50 µH at 7-70 µH at 10-100 µH at 20-200 µH at
1000 Hz
1000 Hz
1000 Hz
1000 Hz
Standard Heatsink area (mm2):
1600
1600
1600
1600
Thickness (mm):
135
135
135
135
Protection Grade (IP):
IP55
Mounting:
Vertically
Cable Length:
300mm
Weight (g):
460
670
920
1250
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.
Dimensions
lf
30
L
ø6.2
82 ±2
P
71 95
Applications
■ Braking
■ Balancing
■ Capacitor Charging
& Discharging
■ Crowbar
■ Filter
■ Power Supplies
■ Electrical Machinery
■ Inrush Limiting
Type
L
P
CFH350
110 mm
60 mm
CFH500
160 mm
110 mm
CFH750
220 mm
140 mm
CFH1100
320 mm
240 mm
Literature No. 1773318
Issued: 09-08
Dimensions are shown for
reference purposes only.
Dimensions are in
millimetres unless
otherwise specified.
Specifications subject to
change.
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