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

0402 & 2010?

0.5%

0.3%

0.5%

0.25%

0.1%

0.2%

0.01% 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, 125°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%

Solderability

The terminations have an electroplated nickel barrier and tin coating. This ensures excellent 'leach' resistance properties and

solderability.

Packaging

PCF Resistors are supplied taped and reeled as per IEC 286-3.

Application Notes

PCF resistors are ideally suited for handling by automatic methods due to their rectangular shape and the small dimensional

tolerances. Electrical connection to a ceramic substrate or to a printed circuit board can be made by reflow or wave soldering of

wrap-around terminations.

Precision Surface Mount Resistors

Issue J . 03.07

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

PCF Series

Performance Data - Standard Range

Performance Data - High Power Range

Performance Data - Passivated Range