STANDARD QUANTITIES PER PACKAGE

Type

RC55

RC65

RC70

Small Box

250

125

25

Large Box

1000

500

250

Reel

5000

2500

-

Large Ammo Pack

1000

1000

-

Precision Metal

Film Resistors

RC SERIES

© Welwyn Components Limited

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

Issue A 07/99

APPLICATION NOTES

Matched Sets and Networks

Welwyn has many years experience in the supply of

matched set of precision resistors.

Resistors can be supplied matched for tolerance and

TCR down to ±0.02% and ±2ppm/°C, either as

separate resistors or pre-assembled and

encapsulated within a plastic box.

The individual resistors within a set or module can

be manufactured with a tolerance of ±0.05% and

TCR of ±5ppm/°C.

PACKAGING

The standard method of packaging RC55 resistors is

taped in ammo packs. Taped resistors on reel or

loose packed components can also be supplied by

special request. The standard packaging for RC65

and RC70 resistors is loose in boxes. By special

request the RC65 components can also be supplied

taped on reel or in ammo pack. In the case of tape

packed components the usable lead length is

reduced by the width of the tape.

Table of Resistance Restrictions

TOLERANCE

TCR

RC55

RC65

RC70

ppm/°C

0.05%

.1 – .25%

.5 – 1%

0.05%

.1 – .25%

.5 – 1%

0.05%

.1 – .25%

.5 – 1%

5

10 to 500k 10 to 500k

1 to 500k

10 to 500k 10 to 500k

1 to 500k

10 to 750k 10 to 750k

1 to 750k

10

10 to 1M

10 to 1M

1 to 1M

10 to 1M

10 to 1M

1 to 1M

10 to 1M

10 to 1M

1 to 1M

15

10 to 1M

5 to 1M

1 to 1M

10 to 1M

5 to 1M

1 to 1M

10 to 1M

10 to 2M

1 to 2M

25

10 to 1M

5 to 2M

1 to 2M

10 to 1M

5 to 2M

1 to 2M

10 to 1M

10 to 5M

1 to 5M

50

10 to 1M

5 to 2M

1 to 4M

10 to 1M

5 to 2M

1 to 4M

10 to 1M

5 to 10M

1 to 10M

100

10 to 1M

1 to 2M

1 to 4M

10 to 1M

1 to 2M

1 to 4M

10 to 1M

1 to 10M

1 to 10M

52

6

6

5

≤ 1.4 mm

175