Carbon Ceramic
Resistors
CCR Series
Welwyn Components
•
Replacement for hot moulded
carbon composition
Non-inductive
Surface mount option
UL94-V0 approved coating
•
High pulse voltage and energy capability
•
•
•
Electrical Data
CCR 1
Power rating at 25°C
Resistance range
Maximum pulse voltage
TCR
Resistance Tolerance
Standard Values
Ambient temperature range
Thermal Impedance
°C
°C/W
watts
ohms
volts
ppm/°C
%
1
220R – 22K
See pulse graphs
<1K0 : -700±200
≥1K0
: -1000±300
E12
-40 to 80
100
10 or 20 *
* Tolerance applies to date of manufacture. As in all carbon composition parts value drift in storage is possible. This is typically 3%
in one year and 5% in 2 years.
Physical Data
Dimensions (mm)
Type
CCR 1
L max
15.5
D max
5.5
D norm
0.8
F min
30
d
D
L
f
Construction
CCR series resistors are produced from a carbon ceramic
composite material, the composition of which is varied to
produce the required resistance value. The ceramic rods are
fitted with end caps to which are welded the termination
wires. Finally, a specially formulated high voltage epoxy
coating is applied and the resistors are marked.
Solvent Resistance
The body protection and marking are resistant to all normal
industrial cleaning solvents suitable for printed circuits.
Marking
CCR series resistors are colour coded. Resistors with 20%
tolerance have three bands indicating value, and resistors with
5% and 10% tolerance have four bands indicating value and
tolerance in accordance with IEC62.
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
All information is subject to Welwyn’s own data and is considered accurate at time of going to print.
A subsidiary of
TT electronics plc
Issue C · 03.06
© Welwyn Components Limited
· Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
WELWYN [ WELWYN COMPONENTS LIMITED ]
