Ceramic Case Resistors –

Wirewound / Metal Oxide

SQP / CAF / CAW Series

The resistor will not burn or emit incandescent

particles under any condition of applied temperature

or overload.

Ceramic Case Resisters –

Wirewound / Metal Oxide

SQP Series

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

Issue C · 07.06

Welwyn Components

Maximum

Load at rated power (1000hrs at 70˚C)

≤100K: 5% +0.05 ,

>100K: 10%

%

R

h

p

a

r

G

e

e

S

C

˚

0

7

t

a

r

e

w

o

p

d

e

t

a

r

m

o

r

f

g

n

i

t

a

r

e

D

Short term overload (6.25xPr for 5s)

5

0

.

0

+

%

2

%

R

Damp heat steady state (56 days, 40˚C, 90% RH)

5

0

.

0

+

%

2

%

R

Temperature rapid change

5

0

.

0

+

%

2

%

R

Resistance to solder heat

5

0

.

0

+

%

1

%

R

Pulse handling

Data available by request

71

Construction

A high purity ceramic rod, with force fit end caps onto which is wound a wire element: or a deposited metal oxide film

(depending on value). The element is fitted into a ceramic case with fireproof insulation cement.

Termination Details

Material

The tinned copper lead wires are internally welded to the resistance element end caps.

Solderability The terminations meet the requirements of IEC 115-1 Clause 4.17.3.2

Strength

The terminations meet the requirements of IEC 86.2.21

Marking

Type reference, resistance value and tolerance are

legend marked onto the upper surface.

Flammability

Solvent resistance

The body protection and marking are resistant to all

normal industrial solvents suitable for printed circuits.

Performance Data

P

100%

50%

0%

-30

70

155

275

T˚C

07.08

Resistors

Make Possible

09.14

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.ttelectronicsresistors.com