RC55P Values 10

≤ 100k

Other Values/Styles

Actual Performance

*Actual Performance

Maximum

Typical

Maximum

Typical

Load at rated power : 1000 hrs at 70°C

∆R %

0.10

0.03

0.5

0.1

Dry heat : 1000 hrs at 155°C

∆R %

0.3

0.1

1.0

0.15

Shelf life : 12 months at room temperature

∆R %

0.015

0.003

0.1

0.03

Derating from rated power at 70°C

Zero at 155°C

Zero at 155°C

Short term overload

∆R %

0.5

0.005

0.1

0.02

Climatic

∆R %

0.25

0.05

0.3

0.1

Climatic category

55/155/56

55/155/56

Long term damp heat

∆R %

0.25

0.05

0.5

0.1

Temperature rapid change

∆R %

0.04

0.02

0.2

0.05

Resistance to solder heat

∆R %

0.02

0.003

0.06

0.03

Vibration and bump

∆R %

0.2

0.002

0.06

0.02

Noise (in a decade of frequency)

µV/V

0.1

0.03

1.0

0.1

Voltage coefficient of resistance

ppm/V

<1

<1

Matched Sets and Networks

Welwyn has many years experience in the supply of matched

sets 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 a TCR of

±5ppm/°C.

Precision Metal

Film Resistors

RCP series

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

177

Issue B · 03.02

Welwyn Components

Application Notes

Performance Data

*An 0.01 ahm addition to be added to the performance claims of all resistors <10R.

Tolerance

TCR

RC55P

RC65P

RC70P

ppm/°C

0.05%

.1-.25%

.5-1%

0.05%

.1-.25%

.5-1%

0.05%

.1-.25%

.5-1%

5

10R to 500k

10R to 500k

1R to 500

10R to 500

10R to 500

1R to 500

10R to 750k

10R to 750k

1R to 750k

10

10R to 1M

10R to 1M

1R to 1M

10R to 1M

10R to 1M

1R to 1M

10R to 1M

10R to 1M

10R to 1M

15

10R to 1M

5R to 1M

1R to 1M

10R to 1M

5R to 1M

1R to 1M

10R to 1M

10R to 2M

1R to 2M

25

10R to 1M

5R to 2M

1R to 2M

10R to 1M

5R to 2M

1R to 2M

10R to 1M

10R to 5M

1R to 5M

50

10R to 1M

5R to 2M

1R to 4M

10R to 1M

5R to 2M

1R to 4M

10R to 1M

5R to 10M

1R to 10M

100

10R to 1M

1R to 2M

1R to 4M

10R to 1M

1R to 2M

1R to 4M

10R to 1M

1R to 10M

1R to 10M

Table of Resistance Restrictions

Packaging

The standard method of packaging RC55P resistors is taped in

ammopacks. Taped resistors on reel or loose packed

components can also be supplied by special request. The

standard packaging for RC65P and RC70P resistors is loose in

boxes. By special request the R65P components can also be

supplied taped on reel or in ammopack. In the case of tape

packed components the usable lead length is reduced by the

width of the tape.

Standard Quantities Per Package

Type

RC55P

RC65P

RC70P

Small box

250

125

25

Large box

1000

500

250

Reel

5000

2500

Ammo pack

1000

1000