Characteristics

Maximum Change

Test Method

Temperature

As Specified

MIL-R55342E Par 4.79 (-55°C =125°C)

Thermal Shock

±0.5% +0.01 ohm

MIL-R55342E Par 4.7.3 (-65°C +150°C, 5 cycles)

Low Temperature Operation

±0.25% +0.01 ohm

MIL-R-55342E Par 4.7.4 (-65°C @ working voltage)

Short Time Overload

±0.5% +0.01 ohm

MIL-R-55342E Par 4.7.5

+1% for R>100K ohm

2.5 x

√PxR for 5 seconds

High Temperature Exposure

±0.5% +0.01 ohm

MIL-R-55342E Par 4.7.6 (+150°C for 100 hours)

Resistance to Bonding Exposure

±0.25% 0.01 ohm

MIL-R-55342E Par 4.7.7 (Reflow soldered to board at

260°C for 10 seconds)

Solderability

95% minimum coverage

MIL-STD-202, Method 208 (245°C for 5 seconds)

Moisture Resistance

±0.5% +0.01 ohm

MIL-R-55342E Par 4.7.8 (10 cycles, total 240 hours)

Life Test

±0.5% +0.01 ohm

MIL-R-55342E Par 4.7.10 (2000 hour at 70°C intermittent)

Terminal Adhesion Strength

±1% +0.01 ohm

1200 gram push from underside of mounted chip

no mechanical change

for 60 seconds

Resistance to Board Bending

±1% +0.01 ohm

Chip mounted in center of 90mm long board, deflected

5mm so as to exert pull on chip for 10 seconds

Type

Maximum

Working

Maximum

Resistance

Tolerance

TCR

Product

Power Rating

Voltage

Category

(watts)

(volts)

(volts)

(ohms)

0R1 to 0R99

1, 2, 5

100

Low Range

CHP1/8

0.25 @ 70°C

200

400

1R0 to 1M

1, 2, 5

50, 100

Standard

20R to 348K

0.25, 0.5

50, 100

Tight Tolerance

CHP1/2

0.5 @ 70°C

300

600

0R1 to 0R99

1, 2, 5

100

Low Range

1R0 to 348K

1, 2, 5

50, 100

Standard

0R1 to 0R99

1, 2, 5

100

Low Range

CHP1

1 @ 70°C

350

700

1R0 to 2M21

1, 2, 5

50, 100

Standard

20R to 348K

0.25, 0.5

50, 100

Tight Tolerance

2 @ 25°C

0R1 to 0R99

1, 2, 5

100

Low Range

CHP2

1.33 @ 70°C

500

1000

1R0 to 2M21

1, 2, 5

50, 100

Standard

Metal Glaze

Surface Mount Power Resistors

CHP Series

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.

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

Electrical Data

Issue C · 05.03

A subsidiary of

TT electronics plc

Welwyn Components

43

Performance Characteristics

1

Not to exceed

2

Consult factory for tighter TCR, tolerance or resistance values

CHP_C.qxd

14/5/03

8:16 am

Page 1