F44KU [TTELEC]

High Voltage Thick Film Resistors; 高压厚膜电阻


型号：	F44KU
厂家：	TT Electronics
描述：	High Voltage Thick Film Resistors 高压厚膜电阻高压
文件：	总2页 (文件大小：96K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

High Voltage

Thick Film Resistors

Welwyn Components

F Series

Working voltage up to 28kV

•

Resistance up to 150G

•

Termination variants

•

Sets supplied with matched characteristics

•

Good ratio matching over wide voltage range

•

Electrical Data

F43

F44

Notes

Power rating

watts

ohms

volts

0.7

2M to 100G

1.3

2M to 150G

14K

Resistance range

Limiting element voltage

In air

In oil

volts

28K

TCR 20° - 70°C

ppm/°C

-2000

Resistance tolerance

Standard values

2, 5, 10

Measured at 100 volts dc

Any value to special order

E24 preferred

-55 to 100

Thermal impedance

Ambient temperature range

°C/watt

°C

Physical Data

Dimensions (mm) & Weight (g)

PCB

Min.

mounting Bend

F44D

Type

L max

25.4

50.8

30.2

53.2

32.6

55.6

D max

8.4

f min

32.0

d nom

0.8

centres Radius Wt. nom

F43D

31.8

57.2

1.2

3.1

5.6

3.9

7.4

5.8

8.2

F44D

8.4

0.8

F43KU

F44KU

F43TU

F44TU

8.5

0.8

F44TU

F44KU

8.5

0.8

8.5

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

Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com

Issue B · 03.02

201

High Voltage

Thick Film Resistors

F Series

Welwyn Components

Screw Terminations: Styles TU and KU

Construction

The Cermetox^®thick film is fired on to the surface of a high

quality ceramic former. Turned brass end caps are fitted. A

helical cut is made into the film to adjust its ohmic value and

finally a sleeve is fitted to provide mechanical protection and

electrical insulation. Resistors for use in oil SF6 can be

supplied with a lacquer protection instead of the sleeve.

Material:

Turned brass

Screw Thread:

All caps are tapped UNF - 10 x 4.2

deep. UNF - 10 is 32 TPI, 60° thread

angle 4.72 0.07 mm outside diameter,

3.83 mm core diameter.

Coupling Stud:

All KU & TU resistors are supplied with

8 mm long screwed brass studs.

Terminations

Marking

Three styles of termination are available to permit resistors to

be screwed together in a series chain, with the end members

having axial wires for soldering.

Type reference, resistance value, tolerance and date code are

legend marked. The resistance values conform to IEC 62.

Solvent Resistance

Wire Terminations: Styles D and KU

The lacquer and protective sleeve provide excellent resistance

to all normal industrial cleaning solvents suitable for printed

circuits.

Non standard wire terminations

available upon request.

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.

Performance Data

Maximum

Typical

Load at rated power: 1000 hours at 20°C

Shelf life: 12 months at room temperature

Derating from rated power at 20°C

Noise (µV/V in a decade of frequency)

Voltage coefficient of resistance

∆R%

0.5

Zero at 100°C

<2.5

<25

ppm/V

Application Notes

Mounting

Matched Sets

Due to the high voltage which can appear between the end

cap and any adjacent metal part, resistors should be mounted

at an adequate distance from other conductors.

Matched sets can be supplied for use as voltage dividers.

These may be screwed together to form sticks and, by

selecting the KU type of termination, a wire connection can

be provided at each end of the stick.

Resistors may be screwed together to provide an assembly

which will be capable of withstanding any desired voltage,

providing no individual resistor is subjected to a greater stress

or power dissipation than is recommended in this data sheet.

Enquiries are welcomed for special resistors and sets when

resistor length, operating voltage or resistance vale is outside

the catalogued range.

For some high voltage applications it is required to immerse

the components in oil or gas to reduce the effects of corona

and surface tracking. A special lacquer is available, suitable

for immersion in transformer oil of SF6.

Packaging

All components are supplied in boxes.

Standard Quantities Per Box

When resistors are required to be potted, the preferred

encapsulant is a silicone compound.

All Types

10 or 20 per box

For voltage dividers with a low resistance section below the

minimum available value of an F43 resistors, it is entirely

suitable to use an RC Series resistor, available down to 1 ohm.

Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com

Issue B · 03.02

202

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