TT electronics PCF Technical data

A subsidiary of

TT electronics plc

Issue J . 03.07

General Note

Welwyn Components reserves the right to make changes in product specification without notice or liability.
All information is subject to Welwyns own data and is considered accurate at time of going to print.

© Welwyn Components Limited Bedlington Northumberland NE22 7AA, UK

Telephone: [phone] Facsimile: [phone] Email: [e-mail] Website: www.welwyn-tt.com

Precision Surface
Mount Resistors

Precision metal film technology
Extended ohmic range 1R - 2M
Precision to

±

0.01% and 5ppm/°C
TCR grades 50, 25, 15, 10, 5ppm/°C
Passivated range for superior humidity performance
Load life stability and humidity to 0.05%

Power

(W)

PCF0201

PCF0402

PCF0603

PCF0805

PCF1206

PCF1210

PCF2010

PCF2512

0.05

0.063

0.063

0.1

0.125

0.25

0.25

0.5

Type

TCR

(ppm/

°C

Limiting
Element

Voltage (V)

100

25
50
25
15
10

5
50
25
15
10

5
50
25
15
10

5
50
25
15
10

5
25
10

5
50
25
15
10

5
50
25
15
10

5

15

25

75

100

150

200

150

150

Ohmic Value Range *

0.1%

10R-200K
10R-200K

50R-12K
50R-12K

50R-2K
4R7-800K
4R7-800K
4R7-332K
4R7-332K

50R-4K

4R7-2M
4R7-2M
4R7-1M
4R7-1M

50R-10K

4R7-1M
4R7-1M
4R7-1M
4R7-1M

50R-15K

51R-2M
100R-330K
100R-200K

4R7-1M

4R7-1M

4R7-1M

4R7-1M

25R-25K

4R7-1M

4R7-1M

4R7-1M

4R7-1M

25R-25K

0.5%

10R-30R (1%)

33R -22K
10R-200K
10R-200K

50R-12K

2R-800K
2R-800K

4R7-332K

1R-2M
1R-2M

4R7-500K

1R-2M
1R-2M

4R7-1M

51R-2M
100R-330K
100R-200K

1R-2M
1R-2M

4R7-1M

1R-2M
1R-2M

4R7-1M

0.25%

10R-200K
10R-200K

50R-12K

2R-800K
2R-800K

4R7-332K

1R-2M
1R-2M

4R7-500K

1R-2M
1R-2M

4R7-1M

1R-2M
1R-2M

4R7-1M

1R-2M
1R-2M

4R7-1M

0.05%

50R-12K
50R-12K

50R-12K

50R-2K
4R7-150K
4R7-150K

25R-100K

50R-4K
4R7-500K
4R7-500K

25R-200K

50R-10K

4R7-1M
4R7-1M

25R-500K

50R-15K

4R7-1M
4R7-1M

25R-500K

25R-25K

4R7-1M
4R7-1M

25R-500K

25R-25K

0.01%

50R-12K
50R-12K
50R-12K
50R-12K

50R-2K
25R-100K
25R-100K
25R-100K
25R-100K

50R-4K
25R-200K
25R-200K
25R-200K
25R-200K

50R-10K
25R-500K
25R-500K
25R-500K
25R-500K

50R-15K

25R-500K
25R-500K
25R-500K
25R-500K

25R-25K
25R-500K
25R-500K
25R-500K
25R-500K

25R-25K

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

Electrical Data - Standard Range

PCF Series

查询PCF0603H-11-K54WT1供应商

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

© Welwyn Components Limited Bedlington Northumberland NE22 7AA, UK

Telephone: [phone] Facsimile: [phone] Email: [e-mail] 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

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%

ConditionsTest 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)ConditionsTest 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)ConditionsTest 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

© Welwyn Components Limited Bedlington Northumberland NE22 7AA, UK

Telephone: [phone] Facsimile: [phone] Email: [e-mail] Website: www.welwyn-tt.com

PCF Series

Performance Data - Standard Range

Performance Data - High Power Range

Performance Data - Passivated Range

Type

Size

Range

Wrap-around terminations provide good leach properties and ensure reliable contact. Due to the robust construction, the PCF can
be immersed in the solder bath for 30 seconds at 260 C. This enables the resistor to be mounted on one side of a printed circuit
board and wire-leaded components applied on the other side.
PCF resistors themselves can operate at a maximum temperature of 125 C (see performance above) (155 C for High Power grades).
For soldered resistors, the joint temperature should not exceed 110 C. This condition is met when the stated power levels at 70 C
are used.

Ordering Procedure

Precision Surface Mount Resistors

PCF 0603 P - 11 - 1K54 B I

50,000/reel

10,000/reel

5000/reel

4000/reel

1000/reel

I

0201
0402
0603, 0805, 1206,
1210
2010, 2512
0402, 0603, 0805,
1206, 2010, 2512

Standard

T1

Please enquire to confirm
availability of 1000 piece reels

0.25%

0.5%

0.01%

0.05%

0.1%

L

W

B

C
D

25ppm/ °C

50ppm/ °C

5ppm/°C
10ppm/°C
15ppm/°C

13
12
11

R
2

Standard

High Power

Passivated

H
P

TCR

Resistance value

(IEC62 Code)

Tolerance

Packing

Issue J . 03.07

© Welwyn Components Limited Bedlington Northumberland NE22 7AA, UK

Telephone: [phone] Facsimile: [phone] Email: [e-mail] Website: www.welwyn-tt.com

PCF Series