HVT Standard Sizes - Willow Technologies

Precision High Voltage Dividers
Type: HVT
Standard Sizes: HVT 20 / 25 / 30 / 40 / 50 / 75 / 100
Features:
•
•
•
•
•
•
•
•
Customer specific design, special versions possible
Radial leads, variable lead spacing by bending
High precision of ratio (0.25 %)
Low relative TCR (25 ppm/K)
High working voltages
Resistance values up to 1 Tera-Ohm
Low values of VCR
Climatic protection by lacquer coating
Dimensions (preference sizes):
L
L
B
D
R
HVT 20
20
25.0
(1”)
30.0
40.0
50.0
75.0
100.0
6.0
1.4
9.0
1.4
17.5
22.9
(0.9”)
27.5
37.8
47.8
72.8
97.8
HVT 25
HVT 30
HVT 40
HVT 50
HVT 75
HVT 100
6.0
6.0
12.5
9.0
9.0/12.5
1.4
1.4
1.4
1.4
1.4
r
d
B
0.40 ±0.05
custom-specific
Size
0.40 ±0.05
±0.05
0.40
0.40 ±0.05
0.40 ±0.05
0.40 ±0.05
0.40 ±0.05
20mm
r
R
Ød
L = length, B = width, D = thickness (Tolerance of dimensions: ± 0.5 mm)
R = standard outer lead spacing (other spacing possible by bending)
d = wire diameter (in mm), other diameters possible (changes D)
other custom-specific sizes on request
Packaging:
Bulk in plastic bags or boxes
Minimum quantity: - 30 pieces for existing types/values
- 100 pieces for new developments
Inquiry / Ordering Data:
Type / Dimensions – Working voltage – Resistance values – Ratio – Outer Lead spacing – Inner
Lead spacing - Tolerance absolute – Tolerance ratio – TCR absolute – TCR relative – Stability
requirements – Environmental conditions
The standard measuring voltage is 10 V, required different voltages are to indicate explicitly.
Issue 04-2009
Willow Technologies Ltd. Shawlands Court, Newchapel Road, Lingfield, Surrey, RH7 6BL, United Kingdom.
+ 44 (0) 1342 835234 + 44 (0) 1342 834306  info[email protected]  http://www.willow.co.uk
-2mm
+0mm
Precision High Voltage Dividers
Type: HVT
Standard Sizes: HVT 20 / 25 / 30 / 40 / 50 / 75 / 100
Technical data – depending on size (examples) 2):
Size
HVT 20
HVT 25
HVT 30
HVT 40
HVT 50
HVT 75
HVT 100
Max. working voltage
U (kV) 1)
6
10
8
15
25
36
50
Power rating P70 (W)
1
1
1
1.2
3.0
4,5
6,0
Lowest value
1M
1M
1M
5M
5M
10 M
20 M
Highest value
100 G
100 G
100 G
100 G
1T
1T
1T
Ratio max.
1:2.000
1:3.000
1:3.000
1:10.000
1:15.000
1:20.000
1:20.000
1)
2)
Custom specific parts: the maximum working voltage depends on resistance value and ratio
Extreme values are not realizable together in all cases
General technical data 2):
Temperature range
-55°C ... +125°C
Temperature coefficient abs.
± 50 ... ± 500 ppm/K
Temperature coefficient rel.
± 25 ... ± 100 ppm/K
Tolerances, absolute:
±1
Tolerances relative (ratio):
± 0.25... ± 5 %
Climatic category acc. to EN 60068-1
Humidity- / contact protection
3)
... ± 20 %
55/125/56
Lacquer coating 3)
Resistant to most solvents. For cleaning the use of isopropyl alcohol (IPA) is recommended.
The use of acetone and methylene chloride is not allowed.
More technical data for specific size: on request.
Versions with single in-line leadframes are available on request
as well as versions with overglaze.
Issue 04-2009
Willow Technologies Ltd. Shawlands Court, Newchapel Road, Lingfield, Surrey, RH7 6BL, United Kingdom.
+ 44 (0) 1342 835234 + 44 (0) 1342 834306  [email protected]  http://www.willow.co.uk