High Voltage Low Inductance
Thick film Resistors
HVL Series
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
HVL 43
HVL 44
HVL 45
Notes
Power rating at 70°C
watts
1.5
3.5
5.0
Resistance range
ohms
1K to 1G
1K to 2G
1K to 4G
Limiting element voltage
volts
4K
14K
24K
In air
8K
28K
48K
In oil
TCR (20°C to 70°C)
ppm/°C
25, 50, 100
Values >1G: TCR is 250ppm/°C
Resistance tolerance
%
1, 2, 5
Closer tolerances over restricted range
Values
E24 preferred values
Any value to special order
Thermal impedance
°C/watt
31
27
20
Ambient temperature range
-55 to 155
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.
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
Electrical Data
Issue B · 03.02
A subsidiary of
TT electronics plc
Welwyn Components
197
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.
Terminations
Material
Solder coated copper wire.
Strength
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.
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.
Dimensions (mm) and Weight (g)
PCB
Min.
bend
radius
mounting
centres
Wt.
nom.
Type
L max.
D max.
f min.
d nom.
HVL 43
25.4
8.0
30
0.8
31.8
1.2
3.1
HVL 44
50.8
8.0
30
0.8
57.2
1.2
5.6
HVL 45
84.2
8.0
30
0.8
87.2
1.2
5.6
Physical Data
L
D
f
d