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.

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

W

0.3 ± 0.05

0.5 ± 0.05

0.8 ± 0.2

1.25 ± 0.2

1.6 ± 0.2

2.6 ± 0.2

2.4 ± 0.2

3.1 ± 0.2

L

0.6 ± 0.05

1.0 ± 0.05

1.6 ± 0.2

2.0 ± 0.2

3.2 ± 0.2

3.2 ± 0.2

4.9 ± 0.2

6.3 ± 0.2

Tmax

0.26

0.40

0.55

0.65

0.65

0.50

0.65

0.65

A

0.12 ± 0.05

0.2 ± 0.1

0.3 ± 0.2

0.4 ± 0.2

0.5 ± 0.2

0.45 ± 0.2

0.5 ± 0.2

0.5 ± 0.2

C

0.12 ± 0.05

0.2 ± 0.1

0.3 ± 0.2

0.4 ± 0.2

0.5 ± 0.2

0.5 ± 0.2

0.6 ± 0.2

0.6 ± 0.2

T

W

A

A

L

Wrap-around terminations

(3 faces)

C

0201

0402

0603

0805

1206

1210

2010

2512

Dimensions (mm)

Physical Data

* Standard values E24 or E96. Other values may be available by request.

50

25

50

25

50

25

PCF0603H

PCF0805H

PCF1206H

0.1

0.125

0.25

0.5%

10R-332K

10R-332K

4R7-1M

4R7-1M

4R7-1M

4R7-1M

Power

(W)

Type

TCR

(ppm/°C

Limiting

Element

Voltage (V)

Ohmic Value Range *

0.25%

10R-332K

10R-332K

4R7-1M

4R7-1M

4R7-1M

4R7-1M

0.1%

10R-332K

10R-332K

4R7-1M

4R7-1M

4R7-1M

4R7-1M

50

150

200

Electrical Data - High Power Range

0.5%

25R-25K

25R-25K

25R-200K

25R-200K

25R-400K

25R-400K

25R-500K

25R-500K

25R-600K

25R-600K

25R-600K

25R-600K

Power

(W)

Type

TCR

(ppm/°C

Limiting

Element

Voltage (V)

50

25

50

25

50

25

50

25

50

25

50

25

Ohmic Value Range *

0.25%

25R-25K

25R-25K

25R-200K

25R-200K

25R-400K

25R-400K

25R-500K

25R-500K

25R-600K

25R-600K

25R-600K

25R-600K

0.1%

25R-25K

25R-25K

25R-200K

25R-200K

25R-400K

25R-400K

25R-500K

25R-500K

25R-600K

25R-600K

25R-600K

25R-600K

PCF0402P

PCF0603P

PCF0805P

PCF1206P

PCF2010P

PCF2512P

0.063

0.063

0.1

0.125

0.25

0.5

25

50

100

150

150

150

* Standard values E24 or E96. Other values may be available by request.

Electrical Data - Passivated Range