Precision Thin Film

Nichrome Chip Resistors

PCF Series

Precision Surface Mount Resistors

03.11

© Welwyn Components Limited Bedlington Northumberland NE22 7AA, UK

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 standard termination is 100% Sn matte plated wrap-around suitable for soldering. SnPb plated option is available for standard

range PCF over the restricted range below.

Physical Data

Dimensions (mm) and Weight (mg)

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

0.14

0402

1.0 0.05

0.5 0.05

0.55

0.2 0.1

0.2 0.1

0.54

0603

1.6 0.2

0.8 0.2

0.65

0.3 0.2

0.3 0.2

1.8

0805

2.0 0.2

1.25 0.2

0.65

0.4 0.25

0.3 0.2

4.7

1206

3.05 0.15

1.55 0.15

0.65

0.35 0.25

0.42 0.2

9.0

1210

3.10 0.15

2.4 0.15

0.65

0.55 0.25

0.4 0.2

10

2010

4.9 0.2

2.4 0.2

0.65

0.5 0.25

0.6 0.3

24

2512

6.3 0.2

3.1 0.2

0.65

0.5 0.25

0.6 0.3

38

T

W

A

A

L

Wrap-around terminations

(3 faces)

C

Precision Surface Mount Resistors

03.11

© Welwyn Components Limited Bedlington Northumberland NE22 7AA, UK

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 standard termination is 100% Sn matte plated wrap-around suitable for soldering. SnPb plated option is available for standard

range PCF over the restricted range below.

Physical Data

Dimensions (mm) and Weight (mg)

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

0.14

0402

1.0 0.05

0.5 0.05

0.55

0.2 0.1

0.2 0.1

0.54

0603

1.6 0.2

0.8 0.2

0.65

0.3 0.2

0.3 0.2

1.8

0805

2.0 0.2

1.25 0.2

0.65

0.4 0.25

0.3 0.2

4.7

1206

3.05 0.15

1.55 0.15

0.65

0.35 0.25

0.42 0.2

9.0

1210

3.10 0.15

2.4 0.15

0.65

0.55 0.25

0.4 0.2

10

2010

4.9 0.2

2.4 0.2

0.65

0.5 0.25

0.6 0.3

24

2512

6.3 0.2

3.1 0.2

0.65

0.5 0.25

0.6 0.3

38

T

W

A

A

L

Wrap-around terminations

(3 faces)

C

Type

TCR

(ppm/°C)

Power

(W)

Limiting Element

Voltage (V)

Ohmic Value Range

1%

0.5%

0.25%

0.1%

PCF0805

50

0.1

100

10R – 250K

25

10R – 100K

15

10R – 100K

PCF1206

50

0.125

150

10R – 500K

25

10R – 200K

15

10R – 200K

SnPb Termination Option Range

Precision Surface Mount Resistors

03.11

© Welwyn Components Limited Bedlington Northumberland NE22 7AA, UK

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 standard termination is 100% Sn matte plated wrap-around suitable for soldering. SnPb plated option is available for standard

range PCF over the restricted range below.

Physical Data

Dimensions (mm) and Weight (mg)

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

0.14

0402

1.0 0.05

0.5 0.05

0.55

0.2 0.1

0.2 0.1

0.54

0603

1.6 0.2

0.8 0.2

0.65

0.3 0.2

0.3 0.2

1.8

0805

2.0 0.2

1.25 0.2

0.65

0.4 0.25

0.3 0.2

4.7

1206

3.05 0.15

1.55 0.15

0.65

0.35 0.25

0.42 0.2

9.0

1210

3.10 0.15

2.4 0.15

0.65

0.55 0.25

0.4 0.2

10

2010

4.9 0.2

2.4 0.2

0.65

0.5 0.25

0.6 0.3

24

2512

6.3 0.2

3.1 0.2

0.65

0.5 0.25

0.6 0.3

38

T

W

A

A

L

Wrap-around terminations

(3 faces)

C

12.16

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

http://www.ttelectronics.com/resistors

BI Technologies IRC Welwyn