RC Series Issue December 2008 Sheet 3 of 3

• 4222 South Staples Street • Corpus Christi Texas 78411 USA

© IRC Advanced Film Division

Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com

Precision Metal Film Resistor

Table of Resistance Restrictions

Tolerance

TCR

ppm/°C

RC55

RC65

RC70

0.05%

0.1 - 0.25%

0.5 - 1%

0.05%

0.1 - 0.25%

0.5 - 1%

0.05%

0.1 - 0.25%

0.5 - 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

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 ±2 ppm/°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

±5 ppm/°C.

A low inductance version is available at 1% tolerance.

For low inductive version add suffix N.

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 re-

duced by the width of the tape.

Type

RC55

RC65

RC70

Small box

250

125

25

Large box

1000

500

250

Reel

5000

2500

-

Large ammo

1000

1000

-

Standard Quantities Per Package

Packaging

52

f1

5

6

6

f2

Body location: f1 - f2 ≤ 1.4mm

Prefix

RC

-

RC55LF

C

6K8

B

B

Type

RC55LF, RC65LF, RC70LF

TCR Code

V = ±5 ppm/°C, T = ±10 ppm/°C, Y = ±15 ppm/°C

D = ±25 ppm/°C, C = ±50 ppm/°C

Resistance Value

Ex: 6K8 = 6.8K

Ω

Tolerance

F = ±1%, D = ±0.5%, C = ±0.25%, B = ± 0.1%, A = ±0.05%

Packaging

A = Ammo Pack; B = Bulk; T = Tape and Reel

For additional information or to discuss your specific requirements,

please contact our Applications Team using the contact details below.

Ordering Data