High Voltage
Thick film Resistors
HV Series
Welwyn Components
•
•
•
•
Resistance up to 250M
Low temperature coefficient of resistance
Working voltage up to 20kV
Sets of resistors with matched characteristics
Electrical Data
HV31
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
°C
75
70
watts
ohms
volts
ppm/°C
%
0.5
1K to 50M
1K
2K
HV32
0.75
2K
4K
HV33
1.0
4K
8K
50, 100
1, 2, 5
E24 preferred
60
-55 to 155
65
60
Any value to
special order
HV34
1.25
7K
14K
HV35
1.5
10K
20K
In air
In oil
Notes
1K to 100M 1K to 150M 1K to 200M 1K to 250M
Physical Data
Dimensions (mm) & Weight (g)
PCB
Type
HV31
HV32
HV33
HV34
HV35
L max
10.0
19.0
15.5
38.0
50.8
D max
3.5
3.6
5.3
3.6
3.6
f min
30.0
30.0
30.0
30.0
30.0
d nom
0.6
0.6
0.8
0.6
0.6
mounting
centres
12.7
25.4
18.4
44.4
57.2
Min.
Bend
Radius
0.6
0.6
1.2
0.6
0.6
Wt. nom
0.5
0.6
1.2
1.1
1.25
d
D
L
f
Construction
A ruthenium oxide based resistive film is fired onto a high
quality ceramic former. Brass caps are force fitted to the
HV32, 34 and 35 rods and plated steel caps to the 31 and 33
sizes. The resistor is adjusted to value by a helical cut in the
film, and the body is protected with a silicone coating.
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.
Marking
Type reference, resistance value, tolerance and date code are
legend marked. The resistance values conform to IEC 62.
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
195
WELWYN [ WELWYN COMPONENTS LIMITED ]
