Datasheet > W21

W21

更新时间： 2024-11-19 07:06:11

品牌	Logo	应用领域
TTELEC		电阻器线绕电阻器
页数	文件大小	规格书
2页	81K
描述
Vitreous Enamelled Wirewound Resistors

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中文翻译

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W21 数据手册

Vitreous Enamelled

Wirewound Resistors

Welwyn Components

W20 Series

• CECC approved

Suitable for harsh environments

•

Impervious lead free vitreous enamel coating

•

Overload characteristics ideal

for protection circuits

•

High stability and reliability

•

High power dissipation for size

•

Electrical Data

Commercial

W21

3.0

ohms 1R to 10K

W215

5.0

1R to 15K

W22

7.0

1R to 22K

W23

10.0

W24

14.0

Power rating at 25°C

Resistance range at 1% tolerance

2% tolerance

watts

1R to 60K 1R to 100K

ohms 0R5 to 10K 0R5 to 15K 0R5 to 22K 1R to 60K 1R to 100K

ohms 0R1 to 10K 0R1 to 15K 0R1 to 22K 0R15 to 60K 0R2 to 100K

5% tolerance

TCR (-55° to 200°C)

pp/°C

Typically: <+-75

Maximum: +-200

Approved BS CECC 40-201-002

Power rating at 25°C

Power rating at 70°C

Resistance range at 1% tolerance

2% tolerance

Style

watts

2.9

2.5

5.0

4.3

7.0

6.0

10.0

9.0

14.0

12.0

ohms 1R to 10K

1R to 15K

1R to 20K

1R to 56K 1R to 100K

ohms 0R5 to 10K 0R5 to 15K 0R5 to 20K 1R to 56K 1R to 100K

ohms 0R1 to 10K 0R1 to 15K 0R1 to 20K 0R15 to 56K 0R2 to 100K

5% tolerance

TCR (-55° to 200°C)

ppm/°C

≥5 ohms < 10 ohms: 400

≥10 ohms: 200

Applicable to commercial and approved ranges

Limiting element voltage

Standard values

Thermal impedance

Ambient temperature range

volts

100

160

200

500

750

E24 preferred. Other values to special order

°C/watt

°C

-55 to 200

Physical Data

Dimensions (mm) and Weight (g)

Type

L max

12.7

22.0

38.0

53.5

D max

5.6

7.0

8.0

f min

22.75

23.1

d nom

0.8

Wt.nom

W21

W215

W22

W23

W24

3.5

8.0

0.8

400

300

200

100

Construction

W215

W22

W21

W24

W23

A high purity ceramic substrate is assembled with interference fit end caps to which are

welded the termination wires. The resistive element is wound on the substrate and welded to

the caps; the vitreous enamel protective coating is then applied.

Terminations

Material

Strength

Copper clad steel wire, nickel plated and solder-coated.

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.

Length

W23’s and W24’s are not supplied on tape. Minimum lead length is 30 mm.

Marking

The resistors are legend marked with type reference, resistance value and tolerance. Values are

marked in accordance with IEC 62.

Dissipation – Watts

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 C · 04.03

中文翻译

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