Features

Surface mount ZI-form option

Flameproof protection

Can replace carbon comp. in many applications

Resistance values down to 0.01 ohms

Ideal for pulse handling applications

General Purpose Cement

Coated Wirewound Resistors

WA80 Series

Dimensions (mm) and Weight (g)

PCB

Min

mounting

bend

Wt

Type

L max.

D max.

f min.

d nom.

centres

radius

nom.

WA82

6.2

2.8

21.20

0.6

10.20

0.6

0.22

WA83

9.0

3.6

19.80

0.8

12.50

1.2

0.50

WA835

12.5

4.5

17.80

0.8

17.50

1.2

0.50

WA84

14.5

5.2

24.55

0.8

20.00

1.2

1.10

(Note 1)

(Note 2)

Note 1: 5.4 for values 0R1

Note 2: 7.2 for values 0R1

WA85

16.5

7.0

23.55

0.8

22.00

1.2

1.75

General Purpose Cement

Coated Wirewound Resistors

WA80 Series

Cost effective

Flameproof protection

Can replace carbon comp. in many applications

Resistance values down to 0.01 ohms

Ideal for pulse handling applications

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.

© Welwyn Components Limited · Bedlington, Northumberland NE22 7AA, UK

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

WA82

WA83

WA835

WA84

WA85

Power rating at 25°c

watt s

1

2.0

2.5

3.0

5

Power rating at 70°c

watt s

.86

1.6

2.0

2.5

4.3

Resistance range

ohms 0R068 to 430R 0R05 to 900R 0R05 to 900R

0R01 to 2K2

0R015 to 6K8

Limiting element voltage

volts

50

50

75

100

150

Isolation voltage

volts

250

250

250

350

500

1

<

C

°/

m

p

p

R

C

T

Ω

1

>

0

5

3

:

Ω:200

0

1

,

5

:

R

0

2

<

%

e

c

n

a

r

e

l

o

t

e

c

n

a

t

si

s

e

R

≥20R: 1, 2, 5, 10

Values

E24 preferred

Thermal impedance

°C/wat t

140

110

90

82

54

200

o

t

5

5

-

C

°

e

g

n

a

r

e

r

u

t

a

r

e

p

m

e

t

t

n

e

i

b

m

A

Electrical Data

Physical Data

07.11

A subsidiary of

TT electronics plc

Welwyn Components

L

D

f

d

Construction

A high quality 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. Cement protection is applied to the

resistor body before marking with indelible ink.

Terminations

Material

Hot tin dipped copper wire

Strength

The terminations meet requirements of

IEC 68.2.21.

Solderability The terminations meet the requirements of IEC

115-1, Clause 4.17.3.2.

≥

≥

All Pb-free parts comply with EU Directive 2011/65/EU amended by (EU) 2015/863 (RoHS3)

All Pb-free parts comply with EU Directive 2011/65/EU amended by (EU) 2015/863 (RoHS3)

10.24

General Note

TT Electronics reserves the right to make changes in product specification without notice or liability.

All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.

© TT Electronics plc

www.ttelectronics.com/resistors

BI Technologies IRC Welwyn