W21-68RJI [ETC]

WIDERSTAND DRAHT EMAILL 68R 100V 2.5W ; WIDERSTAND DRAHT EMAILL 68R 100V 2.5W\n


型号：	W21-68RJI
厂家：	ETC
描述：	WIDERSTAND DRAHT EMAILL 68R 100V 2.5W WIDERSTAND DRAHT EMAILL 68R 100V 2.5W\n 电阻器
文件：	总2页 (文件大小：108K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Vitreous Enamelled

Wirewound Resistors

W20 SERIES

● All welded construction

● High purity ceramic substrate

● Impervious lead free vitreous enamel coating

● High power dissipation for size

● High stability and reliability

● Suitable for harsh environments

● Overload characteristics ideal

for protection circuits

Electrical Data

Commercial

W21

3.0

1 to 10k

0.5 to 10k

0.1 to 10k

W215

5.0

1 to 15k

W22

7.0

1 to 22k

0.5 to 22k

0.1 to 22k

W23

10.0

1 to 60k

W24

14.0

1 to 100k

0.2 to 100k

Power rating at 25°C

Resistance range at

watts

ohms

pp/°C

1% tolerance

2% tolerance

5% tolerance

0.5 to 15k

0.1 to 15k

Typically: <+75

1 to 60k

0.15 to 60k

Maximum: +200

TCR (-55° to 200°C)

Approved BS CECC 40-201-002

Power rating at 25°C

Power rating at 70°C

Style

watts

ohms

ppm/°C

2.9

2.5

5.0

4.3

7.0

6.0

10.0

9.0

14.0

12.0

Resistance range at

1% tolerance

1 to 10k

0.5 to 10k

0.1 to 10k

1 to 15k

0.5 to 15k

0.1 to 15k

1 to 20k

0.5 to 20k

0.1 to 20k

1 to 56k

0.15 to 56k

≥10 ohms: ±200

1 to 100k

0.2 to 100k

2% tolerance

5% tolerance

TCR (-55° to 200°C)

≥5 ohms < 10 ohms: ±400

Applicable to commercial and approved ranges

Limiting element voltage

Standard values

Thermal impedance

volts

100

160

200

500

750

E24 preferred. Other values to special order

°C/watt

°C

Ambient temperature range

-55 to 200

Physical Data

Dimensions (mm) & weight (g)

Type

W21

W215

W22

W23

W24

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

Wt.nom

0.8

3.5

d dia

8.0

CONSTRUCTION

400

300

200

100

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.

W215

W21

W23

W24

W22

TERMINATIONS

Material

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

The terminations meet the requirements of IEC 68.2.21.

The terminations meet the requirements of IEC 115-1,–

Clause 4.17.3.2.

W23’s and W24’s are not supplied on tape.

Minimum lead length is 30 mm.

Strength

Solderability

Length

MARKING

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

Values are marked in accordance with IEC 62.

Dissipation – Watts

SOLVENT RESISTANCE

The body protection and marking are resistant to all normal industrial cleaning

solvents suitable for printed circuits.

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.

Bedlington, Northumberland NE22 7AA, England Tel: 01670 822181 Fax: 01670 829465 Web: http://www.Welwyn-TT.co.uk

Issue A 07/99

Vitreous Enamelled

Wirewound Resistors

W20 SERIES

Performance Data

CECC 40201-002

Requirements

ACTUAL PERFORMANCE

Maximum

Typical

3.5

Load at commercial rating: 1000 hrs at 25°c

Load at CECC rating: 1000 hours at 25°c

Dry heat: 1000 hours at 200°c

Shelf life: 12 months at room temperature

Derating

∆R%

3.5

not specified

0.03

0.02

see derating curve

Short term overload

∆R%

µv/v

1.0

0.5

0.2

Climatic

Climatic category

55/200/56

Long term damp heat

Temperature rapid change

Resistance to solder heat

Vibration and bump

0.05

0.5

0.02

0.2

0.25

0.03

0.25

0.05

Noise (in decade of frequency)

Robustness

not specified

zero

∆R%

Ohms

volts

0.4

0.05

Insulation resistance

not specified

>.1G ohm

500 min

>.1G ohm

500 min

Voltage Proof

Pulse handling data

available by request

APPLICATION NOTES

116

100

Derating Curve

The termination should not be bent closer than

1.6mm from the body, and the recommended

minimum bend radius is 1.2mm. The terminations

are solderable to within 4mm from the body.

When cold, vitreous enamel has excellent insulation

resistance. In common with all insulants

200

315

the specific resistance of the enamel decreases with

increase in temperature. Therefore, resistors

Ambient temperature °C

operated at near maximum temperature cannot be

classed as insulated and should not be used in

contact with any conducting material. Care must be

taken when determining clearance distance between

the resistor body and the printed circuit board or

other components to ensure these are not over

heated. Resistance is measured 6mm from body.

PACKAGING

For W21 and W215 the standard method of

packaging is taped in Ammo Packs. For W22 the

standard method of packaging is taped and reeled.

10 ± 0.5

Alternatives available by special request are detailed

in the table below.

W23’s and W24’s are available only as loose packed

in boxes. W series resistors can bbe supplied

preformed. Contact factory for details.

f₁

f₂

f₁– f₂≤ 1.4 mm

STANDARD QUANTITIES PER PACKAGE

Type

W21 W215 W22 W23 W24

Type

W21

W215

W22

Ammo Pack

Reel

1000 750

500

700

N/A

63±2

73±2

Small Box

N/A

Bedlington, Northumberland NE22 7AA, England Tel: 01670 822181 Fax: 01670 829465 Web: http://www.Welwyn-TT.co.uk

Issue A 07/99

相关型号：