WHPC Series

Thick Film High Power Chip Resistor

WHPC Series

Construction

Thick-film electrodes, resistor material, overglaze and organic protection are screen printed on an alumina substrate.

Wrap-around terminations have an electroplated nickel barrier and matt tin plating; this ensures excellent leach

resistance properties and solderability.

Marking

5% parts are marked with 3 digits. The first two digits are significant figures and the third digit is the number of

zeros to follow. The letter “R” represents a decimal point.

1% parts have four digits, the first three digits are significant figures and the fourth digit is the number of zeros to

follow. The letter “R” represents a decimal point.

Solvent Resistance

The body protection is resistant to all normal industrial cleaning solvents suitable for printed circuits.

Performance Data

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

AEC-Q200 Table 7

Method

Max. (+0.05Ω except where stated)

Typ.

ref.

Test

3

High Temp. Exposure * MIL-STD-202 Method 108 ΔR

± %

1

3

0.15

4

Temperature Cycling JESD22 Method JA-104

ΔR%

0.5

1.5 +0.1Ω

0.1

6

Moisture Resistance MIL-STD-202 Method 106 ΔR% 2 +0.1Ω

3 +0.1Ω

0.05

7

Biased Humidity * MIL-STD-202 Method 103 ΔR%

2

3 +0.1Ω

0.2

8 Operational Life (Cyclic Load) * MIL-STD-202 Method 108 ΔR%

2

3 +0.1Ω

0.2

14

Vibration MIL-STD-202 Method 204 ΔR%

0.5

1

0.1

15 Resistance to Soldering Heat * MIL-STD-202 Method 210 ΔR%

1

0.05

16

Thermal Shock * MIL-STD-202 Method 107 ΔR%

0.5

1

0.05

18

Solderability *

J-STD-002

>95% coverage

21

Board Flex *

AEC-Q200-005

ΔR%

1

0.25

22

Terminal Strength

AEC-Q200-006

no damage

Climatic *

Category 55/155/42

ΔR%

2

3

0.2

Short Term Overload * 6.25 x Pr or 2 x LEV for 5s ΔR%

1.5

2 +0.1Ω

0.15

Pulse Loading Capability 10,000 pulses @70°C

See graphs below

ΔR%

2

0.5

Insulation Resistance *

400V for 1 minute

≥10G

1. Full AEC-Q200 qualification applies to 1206 and 2010 siz

0508X, 0612X & 1020X.

es,

Other sizes received the tests marked *.

±

±

±

±

±

±

±

±

±

±

±

Range: Standard

1%

Standard

5%

Extra-high-

power

1

0.5

0.5

0.5

N/A

N/A

N/A

N/A

1+0.1Ω

1+0.1Ω

1

1

Thick Film High

Power Chip Resistor

12.24

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

www.ttelectronics.com/resistors

BI Technologies IRC Welwyn

Thick Film High Power Chip Resistor

WHPC Series

0

20

40

60

80

100

120

-55

-20

15

50

85

120

155

Ambient temperature (ºC)

0

10

20

30

40

50

60

70

80

0

0.2

0.4

0.6

0.8

1

Power Dissipation (W)

Pulse Loading Capability

Test condition: 10,000 pulses at 70ºC. Single pulse condition has mean power ≤ 10% of Pr. Continuous pulse

condition has mean power = Pr.

De-Rating Curve

Temperature Rise (hotspot)

WHPC All Sizes

WHPC 1206 and 2010

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

WHPC 1206

1

10

100

1.E-05

1.E-04

1.E-03

1.E-02

1.E-01

1.E+00

Pulse duration (s)

Single pulse

Continuous pulse

WHPC 2010

1

10

100

1000

1.E-05

1.E-04

1.E-03

1.E-02

1.E-01

1.E+00

Pulse duration (s)

Single pulse

Continuous pulse

1206

2010

70

0