High Voltage Low Inductance
Thick film Resistors
HVL Series
Welwyn Components
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Working voltage up to 48kV
Low inductance
Resistance up to 4G
Low temperature coefficient of resistance
Low voltage coefficient
Sets of resistors with matched characteristics
Electrical Data
HVL 43
Power rating at 70°C
Resistance range
Limiting element voltage
TCR (20°C to 70°C)
Resistance tolerance
Values
Thermal impedance
Ambient temperature range
°C/watt
31
watts
ohms
volts
ppm/°C
%
1.5
1K to 1G
4K
8K
HVL 44
3.5
1K to 2G
14K
28K
25, 50, 100
1, 2, 5
E24 preferred values
27
-55 to 155
20
HVL 45
5.0
1K to 4G
24K
48K
In air
In oil
Values >1G: TCR is 250ppm/°C
Closer tolerances over restricted range
Any value to special order
Notes
Physical Data
Dimensions (mm) and Weight (g)
PCB
mounting
centres
31.8
57.2
87.2
Min.
bend
radius
1.2
1.2
1.2
Wt.
nom.
3.1
5.6
5.6
Type
HVL 43
HVL 44
HVL 45
L max.
25.4
50.8
84.2
D max.
8.0
8.0
8.0
f min.
30
30
30
d nom.
0.8
0.8
0.8
d
D
L
f
Construction
A ruthenium oxide based resistive film is fired onto a high
quality ceramic former. Cap and lead assemblies are force
fitted to the former. The resistor is adjusted to value and the
body is protected with a silicone coating.
Marking
Type reference, resistance value, tolerance and date code are
legend marked. The resistance value conforms to IEC 62.
Solvent Resistance
The body protection and marking are resistant to all normal
industrial cleaning solvents suitable for printed circuits.
Terminations
Material
Strength
Solder coated copper wire.
The terminations meet the requirements of
IEC 68.2.21.
Solderability
The terminations meet the requirements of
IEC 115-1, Clause 4.17.3.2.
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 B · 03.02
© 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
197
WELWYN [ WELWYN COMPONENTS LIMITED ]
