Type CFR Series
The resistive element comprises a
thin film of carbon, deposited onto a
high thermal conductivity ceramic
core. Metal end caps are force
fitted to the element prior to
spiralling to value. Tinned copper
lead wires are welded to the end
caps and the components are then
coated. One coat of phenolic resin
is followed by three coats of epoxy
resin. All resistors are tested for
value and tolerance.
Key Features
■Low cost, combined with
high reliability, make
these components
suitable for use
in most types of circuits,
including audio,
communications,
measurement and
computer applications.
■Premium quality carbon
film resistors whose
ceramic core
has a high alumina
content
offering power to size
ratios not normally
associated with
carbon film product.
■Available in 5 power
ratings from 1 ohm to 10
Mohm. The smallest case
size (CFR16) has a full
0.25 W power rating.
Characteristics -
Electrical
CFR16 CFR25 CFR50 CFR100 CFR200
Rated Power @ 70 °C (W) 0.25 0.33 0.5 1 2
Resistance Range (Ohms) Min 1R0 1R0 1R0 1R0 1R0
Max 4M7 10M 10M 10M 10M
Tolerance (%) 2 5
Code letter G J
Temp. Coefficient (ppm/°C) R<10
0 to +200 0 to +200 0 to +200 0 to +350 0 to +350
R>10
0 to -1200 0 to -1200 0 to -1200 -100 to -500 -100 to -500
Selection Series E24
Limiting Element Voltage (V) 200 250 350 500 500
Max Overload Voltage
1
(V) 400 500 700 1000 1000
Max Intermittent Overload Voltage
2
(V) 500 700 750 750 750
Operating Temp. Range (°C) -55 to +155
Climatic Category (°C) 55/155/56
Dielectric Strength (V) 400 500 700 1000 1000
Insulation Resistance (Mohms) 1000
1Maximum Overload Voltage is 2.5 times rated voltage up to the specified voltage for 5 seconds.
2Maximum Intermittent Overload Voltage is 4 times rated voltage up to the specified voltage for 1 second ON and 25 seconds OFF. >100R
ONLY
Derating Curve Surface Temperature Rise vs Load
Dimensions
Style L* max. D max. d ±0.05 I
CFR16 3.5 1.85 0.45 28 ± 3
CFR25 6.8 2.5 0.54 28 ± 3
CFR50 9.0 3.0 0.54 28 ± 3
CFR100 12.0 5.0 0.70 28 ± 3
CFR200 16.0 5.5 0.70 28 ± 3
* Length is measured in accordance with IEC 294
40 60 70 80 100 120 140 160
100
80
60
40
20
0
Percent Rated Power
Ambient Temperature (°C)
0 0.125 0.25 0.375 0.5 0.75 1 2
80
60
40
20
0
Temperature Rise (°C)
Power Dissipation (W)
CFR16 CFR25 CFR50 CFR100
CFR200
Carbon Film Fixed Resistors
Type CFR Series
Literature No. 1773195
Issued: 07-08
Dimensions are shown for
reference purposes only.
Dimensions are in
millimetres unless
otherwise specified.
Specifications subject to
change.
tycoelectronics.com
passives.tycoelectronics.com
Mounting
The resistors are suitable for processing on automatic insertion equipment and cutting and bending machines.
Marking
The resistors are marked with a four colour band code in accordance with IEC 62.
Packaging
Carbon film resistors are normally supplied taped in 'ammo' boxes. Other styles may be supplied on request.
All tape specifications are in accordance with IEC 286-1.
Performance Characteristics
The evaluation of the performance characteristics is carried out with reference to IECQ specifications
QC 400 000 and QC 400 100.
How to Order
Orders for these components should include the following information:-
Type, tolerance code letter and value e.g. CFR25 J 1K0
Type Box Std. Tape Component
Quantity Spacing Spacing
CFR16 5000 52 5
CFR25 4000 52 5
CFR50 3000 52 5
CFR100 1000 52 10
CFR200 500 64 10
TEST REF Long Term Tests ±(5% + 0.1 ohm)
4.23 Climatic sequence
4.24 Damp heat, steady state
4.25.1 Endurance at 70°C
4.25.3 Endurance at 155°C
TEST REF Short Term Tests ±(1% + 0.05 ohm)
4.13 Overload
4.16 Robustness of terminations
4.18 Resistance to soldering heat
4.19 Rapid change of temperature
4.22 Vibration
Carbon Film Fixed Resistors
Type CFR Series
Literature No. 1773195
Issued: 07-08
Dimensions are shown for
reference purposes only.
Dimensions are in
millimetres unless
otherwise specified.
Specifications subject to
change.
tycoelectronics.com
passives.tycoelectronics.com
