Precision Thin Film

Nichrome Chip Resistors

PCF Series

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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

1.14

Precision Surface Mount Resistors

03.11

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

PCF Series

>0.05% tolerance

0603 to 2512

0.25%

0.3%

0.5%

0.25%

0.1%

0.2%

Load life

Humidity

Short term overload

High temperature operation

Temperature cycle

Resistance to solder heat

Solderability

Maximum change (+0.05R)

Chip size

0201, 0402

0.5%

0.3%

0.5%

0.25%

0.1%

0.2%

≤0.05% tolerance

0603 to 2512

0.05%

0.05%

0.05%

0.25%

0.05%

0.05%

Conditions

Test Parameters

1000 hours rated load @ 70°C

1000 hours @ 40°C, 90 - 95%RH

6.25 x rated Power , or 2 x LEV, for 5 sec

1000 hours at 125°C

5 cycles -55 C, 125°C

270°C, 10 sec

235°C, 2 sec

95% minimum coverage

0.5%

0.5%

0.5%

0.5%

0.25%

0.2%

95% minimum coverage

Load life

Humidity

Short term overload

High temperature operation

Temperature cycle

Resistance to solder heat

Solderability

Maximum change (+0.05R)

Conditions

Test Parameters

1000 hours rated load @ 70°C

1000hrs @ 40°C, 90 - 95%RH

6.25 x rated Power, or 2 x LEV, for 5 sec

1000 hours at 155°C

5 cycles -55°C, 150°C

270°C, 10 sec

235°C, 2 sec

0603 to 2512

0.05%

0.05%

0.02%

0.05%

0.02%

0.02%

Load life

Humidity

Short term overload

High temperature operation

Temperature cycle

Resistance to solder heat

Solderability

Maximum change (+0.05R)

Conditions

Test Parameters

1000 hours rated load @ 70°C

1000hrs @ 40°C, 90 - 95%RH

6.25 x rated Power, or 2 x LEV, for 5 sec

1000 hours at 125°C

5 cycles -55 C, 125°C

270°C, 10 sec

235°C, 2 sec

95% minimum coverage

0402

0.25%

0.5%

0.1%

0.5%

0.1%

0.1%

Performance Data - Standard Range

Performance Data - High Power Range/Extended High Power Range

Performance Data - Passivated Range

Construction

A thin-film material is selectively deposited on a 96% alumina substrate together with metallic contacts at each end of the resistor.

The unadjusted resistors are heat treated to give the required TCR and stability, then a precisely controlled laser trim process adjusts

the resistance value. Epoxy protection is applied and wrap-around terminations are added and plated with Nickel then Tin. Each

resistor is measured immediately before packing into tape.

Terminations

The chips are supplied with 100% Sn matte plated wrap-around terminations suitable for soldering.

Physical Data

Dimensions (mm) and Weight

L

W

T max

A

C

Wt

0201

0.58 0.05

0.29 0.05

0.26

0.15 0.05

0.12 0.05

1

0402

1.0 0.05

0.5 0.05

0.40

0.2 0.1

0.2 0.1

3

0603

1.6 0.2

0.8 0.2

0.55

0.3 0.2

0.3 0.2

6

0805

2.0 0.2

1.25 0.2

0.65

0.4 0.25

0.3 0.2

9

1206

3.05 0.15

1.55 0.15

0.65

0.35 0.25

0.42 0.2

20

1210

3.10 0.15

2.4 0.15

0.50

0.55 0.25

0.4 0.2

25

2010

4.9 0.2

2.4 0.2

0.65

0.5 0.25

0.6 0.3

36

2512

6.3 0.2

3.1 0.2

0.65

0.5 0.25

0.6 0.3

55

T

W

A

A

L

Wrap-around terminations

(3 faces)

C