b

f1

f2

6

6

c

Body Location f 1 – f 2 ≤ 1.4 mm

Marking

WA85 resistors are legend marked with type

reference, resistance value and tolerance. In conformance

with IEC 62.

WA82, 83, 835 and 84 resistors 0R1 and above are colour

coded with 4 bands in conformance with IEC 62. Values

below 0R1 are 3 band marked, two digits and tolerance,

there is no multiplier band.

General Purpose Cement

Coated Wirewound Resistors

WA80 Series

© 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

07.11

Welwyn Components

l

a

c

i

p

y

T

m

u

m

i

x

a

M

Load at rated power: 1000 hrs at 25 or 70°c

∆R%

5.0 + .001Ω

3.0

Dry heat: 1000 hrs at 200°c

∆R%

5.0 + .001Ω

3.0

e

v

r

u

c

g

n

it

a

r

e

d

e

e

S

c

°

5

2

t

a

r

e

w

o

p

d

e

t

a

r

m

o

r

f

g

n

it

a

r

e

D

Short term overload

∆R%

5.0 + .001Ω

1.0

Climatic

∆R%

5.0 + .001Ω

2.0

Climatic category

∆R%

55/200/56

Long term damp Heat: 56 days

∆R%

5.0 + .001Ω

1.0

T.R.C. & Vibration

∆R%

5.0 + .001Ω

1.0

Robustness & Solder Heat

∆R%

5.0 + .001Ω

1.0

Pulse Handling

See:

https://www.ttelectronics.com/TTElectronics/media/ProductFiles/Resistors/ApplicationNotes/Wirewound-Pulse-Overload-Resistors.pdf

Solvent Resistance

The body protection and marking are resistant to all normal

industrial cleaning fluids suitable for printed circuits.

Flammability

The resistor coating will not burn under any condition of

applied temperature or component overload.

Performance Data

Application Notes

Care must be taken when determining clearance between the

resistor body and the P.C.B. or other components. Resistance

is measured 6mm from body.

Packaging

All resistors are supplied tape packed ready for loading onto

automatic sequencing and insertion machines. The critical

dimensions are shown in figure 2.

Component wires will not protrude beyond the outside edge

of the tapes.

All taped resistors will be supplied either on reels or in

ammopacks, depending upon quantities orderded.

These products are also available in a range of lead forming options.

In particular, WA83, 84 and 85 are available in ZI-form SMD format

packed in blister tape

see http://www.ttelectronics.com/themes/ttelectronics/datasheets/resistors/ZI-form.pdf

Figure 2

Type

WA82

WA83

WA835

WA84

WA85

b

52

52

52

67

63

c

5

5

5

10

10

WA80 Series

b

f1

f2

6

6

c

Body Location f 1 – f 2 ≤ 1.4 mm

Marking

WA85 resistors are legend marked with type

reference, resistance value and tolerance. In conformance

with IEC 62.

WA82, 83, 835 and 84 resistors 0R1 and above are colour

coded with 4 bands in conformance with IEC 62. Values

below 0R1 are 3 band marked, two digits and tolerance,

there is no multiplier band.

General Purpose Cement

Coated Wirewound Resistors

WA80 Series

© 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

07.11

Welwyn Components

l

a

c

i

p

y

T

m

u

m

i

x

a

M

Load at rated power: 1000 hrs at 25 or 70°c

∆R%

5.0 + .001Ω

3.0

Dry heat: 1000 hrs at 200°c

∆R%

5.0 + .001Ω

3.0

e

v

r

u

c

g

n

it

a

r

e

d

e

e

S

c

°

5

2

t

a

r

e

w

o

p

d

e

t

a

r

m

o

r

f

g

n

it

a

r

e

D

Short term overload

∆R%

5.0 + .001Ω

1.0

Climatic

∆R%

5.0 + .001Ω

2.0

Climatic category

∆R%

55/200/56

Long term damp Heat: 56 days

∆R%

5.0 + .001Ω

1.0

T.R.C. & Vibration

∆R%

5.0 + .001Ω

1.0

Robustness & Solder Heat

∆R%

5.0 + .001Ω

1.0

Pulse Handling

See:

https://www.ttelectronics.com/TTElectronics/media/ProductFiles/Resistors/ApplicationNotes/Wirewound-Pulse-Overload-Resistors.pdf

Solvent Resistance

The body protection and marking are resistant to all normal

industrial cleaning fluids suitable for printed circuits.

Flammability

The resistor coating will not burn under any condition of

applied temperature or component overload.

Performance Data

Application Notes

Care must be taken when determining clearance between the

resistor body and the P.C.B. or other components. Resistance

is measured 6mm from body.

Packaging

All resistors are supplied tape packed ready for loading onto

automatic sequencing and insertion machines. The critical

dimensions are shown in figure 2.

Component wires will not protrude beyond the outside edge

of the tapes.

All taped resistors will be supplied either on reels or in

ammopacks, depending upon quantities orderded.

These products are also available in a range of lead forming options.

In particular, WA83, 84 and 85 are available in ZI-form SMD format

packed in blister tape

see http://www.ttelectronics.com/themes/ttelectronics/datasheets/resistors/ZI-form.pdf

Figure 2

Type

WA82

WA83

WA835

WA84

WA85

b

52

52

52

67

63

c

5

5

5

10

10

General Purpose Cement

Coated Wirewound Resistors

WA80 resistors can be supplied with radial, goalpost or lancet pre-formed

leads- see

https://www.ttelectronics.com/TTElectronics/media/ProductFiles/Application-Note/TN008-Resistors-Leadform-Capability.pdf

WA83, 84 and 85 is also available in ZI-form SMD format packed in blister

tape- see

https://www.ttelectronics.com/TTElectronics/media/ProductFiles/Resistors/Datasheets/ZI-form.pdf

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