General Note
IRC reserves the right to make changes in product specifi cation without notice or liability.
All information is subject to IRC’s own data and is considered accurate at time of going to print. A subsidiary of
TT electronics plc
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Wire and Film Technologies Division
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
Commercial Grade
Vertical Mount Power
Wirewound & Film Resistors
Electrical Data
IRC Type
Power
Rating at
70°C (W)
Resistance
Range*
(Ohms)
Tolerance
(±%)
Temperature Coeffi cient of Resistance
(±ppm/°C)
Wirewound Type (CVW)
CVW - 2 2 0.1 - 27
5, 10 400 (<20Ω)
350 (≥20Ω)
CVW - 3 3 0.1 - 39
CVW - 5 5 0.1 - 47
CVW - 7 7 0.1 - 680
CVW - 10 10 0.1 - 910
Film Type (CVF)
CVF - 2 2 28 - 33K
5, 10 400 (<20Ω)
350 (≥20Ω)
CVF - 3 3 40 - 56K
CVF - 5 5 48 - 100K
CVF - 7 7 681 - 200K
CVF - 10 10 911 - 200K
CVW/CVF Series
• Power ratings from 2W to 10W
• Non-inductive winding available
• Resistance range from 0.1Ω to 200KΩ
• Vertical mounting confi guration saves board space
• Flameproof ceramic case with inorganic potting material
Environmental Data
* For resistance values outside these ranges, contact factory.
Short-time overload CVF: ±5% + 0.05Ω; 10 x nominal power for 5 seconds
CVW: ±5% + 0.05Ω; 10 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
CVW/CVF Series Issue March 2009 Sheet 1 of 3
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Wire and Film Technologies Division
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
Physical Data
Dimensions (mm)
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
Commercial Grade
Vertical Mount Power
Wirewound & Film Resistors
W
D L 5 ± 1
P
d
W
D L 5 ± 1
P
d
5 ± 1
Radial Leaded Type - CVW/CVF Series
CVW CVF
Power Derating Curve
Ambient Temperature (°C)
Temperature Rise Chart
+70°C +155°C
-55 0 50 100 150 200 250 300
100
80
60
40
20
0
Percent Rated Load (%)
+275°C
Temperature Rise (°C)
10W
7W
5W
3W
2W
250
200
150
100
50
020 40 60 80 100
CVW/CVF Series Issue March 2009 Sheet 2 of 3
Rated Load (%)
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Wire and Film Technologies Division
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
Commercial Grade
Vertical Mount Power
Wirewound & Film Resistors
Sample Part No.
IRC Type
CVF - Ceramic Vertical Film
CVW - Ceramic Vertical Wirewound
Power Rating
(See specs table)
Resistance Value (EIA 4-digit code)
(≥100Ω - First 3 signifi cant digits plus 4th digit multiplier)
Example: 100Ω = 1000, 1000Ω = 1001
(>100Ω - "R" is used to designate decimal)
Example: 10Ω = 51R0, 0.25Ω = R250
Tolerance (EIA format)
J = ±5%
K = ±10%
RoHS- compliance
LF = RoHS compliant construction
Packaging
TR = Tape and reel only
Ordering Data
CVF 2 1001 J LF TR
Specify type, resistance, tolerance, RoHS-Compliance and packaging.
This example is for a ceramic vertical fi lm, 2-watt, 1000Ω resistor.
CVW/CVF Series Issue March 2009 Sheet 3 of 3