High Voltage

Planar Resistors

HVP Series

Physical Data

· Excellent reliability

· Ideally suited for medical applications

· Voltages up to 20kV

· Resistance values up to 1G

· Small footprint

Resistance range ohms 1K0 to 250M 1K5 to 500M 2K0 to 500M 3K0 to 500M 4K0 to 750M 5K0 to 1G0

Limiting element voltage (dc or ac peak) kV 2 5 7.5 10 15 20

TCR (20°C to 70°C) ppm/°C 100

Resistance tolerance % 1, 5

Values E24 preferred

Ambient temperature range °C -55 to 155

Dimensions (mm)

Type L ±0.75 H ±0.5 W ±0.5 P ±0.5

HVP04 10.16 6.35 2 7.62

HVP06 12.7 6.35 2 10.16

General Note

Conductor pads are printed to the rear and front faces of a 96% alumina substrate. A specially selected high voltage thick film resistor ink, based

on a ruthenium oxide/glass system, is printed between the front face conductors and then covered in an overglaze before being protected with a

special screen printed material which gives excellent high voltage and climatic performance.

Type, resistance value and tolerance are legend marked in black ink on the rear of the component. The resistance value conforms to IEC 62.

The component protection and marking are resistant to all normal industrial cleaning solvents suitable for printed circuit boards

Solder coated phosphor bronze leadframe terminations are solder dipped in SnAgCu and meet the following IEC requirements:

IEC 68.2.21 – Strength

Due to the possibility of surface condensation it is recommended that high voltages are not applied to resistors in areas of high humidity without

the application of suitable moisture resistant lacquer

The experience of Welwyn engineers has been used to design this generation of high voltage planar resistors to be suitable for a majority of

applications. However, should an application require particular consideration, Welwyn designers are able to provide advice and where applicable, to

recommend a non-standard product. Special sizes, designs etc, can be prototyped at short notice.

Performance Data

Load at rated power: 1000 hours at 70°C ΔR% 1 0.25

Dry heat: 1000 hours at 155°C ΔR% 1 0.25

Resistance to solder heat ΔR% 0.25 0.02

HVP10, HVP15, HVP20 -1.5 -0.5

General Note

Ordering Procedure

Example: HVP06 at 15 megohms and 1% tolerance and packed in a box with a standard quantity of 160 pieces:

H V P 0 6 – 1 5 M F B 0 1 6

Value (use IEC62 code)

B016 HVP06 160 / box

B012 HVP08 120 / box

B008 HVP10 80 / box

B006 HVP15 60 / box

B004 HVP20 40 / box

F 1%

J 5%

General Note