General Note
A subsidiary of
TT electronics plc
CVW/CVF Series Issue February 2007
IRC reserves the right to make changes in product specification without notice or liability.
All information is subject to IRC’s own data and is considered accurate at time of printing.
IRC Wire and Film Technologies Division
© IRC Wire and Film Technologies Division
Telephone: 828 264 8861 • Facsimile: 828 264 8866 • Website: www.irctt.com
• 736 Greenway Road Boone, North Carolina 28607-1860• 736 Greenway Road Boone, North Carolina 28607-1860
IRC Type Power Resistance Tolerance Temperature Coefficient of Resistance
Rating at Range* (±%) (±ppm/ºC)
25°C (W) (Ohms)
Wirewound type (CVW)
CVW-2 2 0.1 - 27 5, 10
CVW-3 3 0.1 - 39 5, 10 400 (<20Ω)
CVW-5 5 0.1 - 47 5, 10 350 (≥20Ω)
CVW-7 7 0.1 - 680 5, 10
CVW-10 10 0.1 - 910 5, 10
Film type (CVF)
CVF-2 2 28 - 33K 5, 10
CVF-3 3 40 - 56K 5, 10 400 (<20Ω)
CVF-5 5 48 - 100K 5, 10 350 (≥20Ω)
CVF-7 7 681 - 200K 5, 10
CVF-10 10 911 - 200K 5, 10
• Vertical mounting configuration saves board space
• Power ratings from 2W to 10W
• Resistance range from 0.1Ω to 200KΩ
• Flameproof ceramic case with inorganic potting material
• Non-inductive winding available
Specifications
CVW/CVF Series
Commercial Grade Vertical Mount
Power Wirewound & Film Resistors
* For resistance values outside these ranges, contact factory
Short-time overload ±5% +0.05Ω; 2.5 x nominal power for 5 seconds
Dielectric withstanding voltage 1000Vac
Resistance to Soldering heat ±5% +0.05Ω
Operating temperature range -55°C to 275°C
Environmental Performance
ULR Series
Metal Element Current Sense Resistor
IRC Wire and Film Technologies Division
General Note
A subsidiary of
TT electronics plc
CVW/CVF Series February 2007
IRC reserves the right to make changes in product specification without notice or liability.
All information is subject to IRC’s own data and is considered accurate at time of printing.
© IRC Wire and Film Technologies Division
Telephone: 828 264 8861 • Facsimile: 828 264 8866 • Website: www.irctt.com
• 736 Greenway Road Boone, North Carolina 28607-1860
Dimensions (mm)
Performance Curves Ordering Data
+70°C
100
80
60
40
20
+155°C +275°C
Ambient temperature (°C)
Percent rated load (%)
-55 0 50 100 150 200 250 300
Derating Curve
Radial Leaded Type - CVW/CVF Series
L 5±1D
5±1
P
d
W
Temperature Rise Chart
Rated load (%)
Temperature Rise (ºC)
0 20 40 60 80 100
250
200
150
100
50
10W
7W
5W
3W
2W
IRC Type
Wirewound Type Film Type W (±1) D (±1) L (±1) P (±1) d (±0.02)
CVW-2 CVF-2 11.5 7.5 20.0 5 0.7
CVW-3 CVF-3 12.5 8.5 25.0 5 0.7
CVW-5 CVF-5 12.5 9.0 25.0 5 0.8
CVW-7 CVF-7 12.5 9.0 38.0 5 0.8
CVW-10 CVF-10 12.5 9.0 50.0 5 0.8
Sample Part No. CVF 2 1001 J LF BLK
IRC Type
CVF - Ceramic Vertical Film
CVW - Ceramic Vertical
Wirewound
Power rating
(See specs table)
Resistance Value (EIA 4-digit code)
(≥100Ω - First 3 significant digits
plus 4th digit multiplier)
Example: 100Ω = 1000;
1000Ω = 1001
(>
100
Ω - “R” is used to
designate decimal)
Example:
10Ω = 10R0;
0.25Ω = R250
Tolerance (EIA format)
J = ±5%
K = ±10%
RoHS- compliance
LF = RoHS compliant construction
Packaging
BLK = bulk packaging
Specify type, resistance, tolerance, RoHS-Compliance
and packaging. This example is for a ceramic vertical film
2-watt, 1000Ω resistor.
CVW/CVF Series
Commercial Grade Vertical Mount
Power Wirewound & Film Resistors
