Metal Glaze
™
General Purpose
Surface Mount Power Resistors
CHP Series
Welwyn Components
•
Up to 2 watts
•
0.1 ohm to 2.2 megohm range
•
Up to 1000 volts
•
150°C maximum operating temperature
Electrical Data
Type
Maximum
Power Rating
(watts)
Working
Voltage
1
(volts)
Maximum
Voltage
(volts)
Resistance
Range
2
(ohms)
0R1 to 0R99
CHP1/8
0.25 @ 70°C
200
400
1R0 to 1M
20R to 348K
0R1 to 0R99
CHP1/2
0.5 @ 70°C
300
600
1R0 to 348K
0R1 to 0R99
CHP1
1 @ 70°C
2 @ 25°C
CHP2
1
2
Tolerance
(±%)
2
1, 2, 5
1, 2, 5
0.25, 0.5
1, 2, 5
1, 2, 5
1, 2, 5
1, 2, 5
0.25, 0.5
1, 2, 5
1, 2, 5
TCR
(ppm/°C)
2
100
50, 100
50, 100
100
50, 100
100
50, 100
50, 100
100
50, 100
Product
Category
Low Range
Standard
Tight Tolerance
Low Range
Standard
Low Range
Standard
Tight Tolerance
Low Range
Standard
350
700
1R0 to 2M21
20R to 348K
0R1 to 0R99
1.33 @ 70°C
500
1000
1R0 to 2M21
Not to exceed
√
PxR
Consult factory for tighter TCR, tolerance or resistance values
Performance Characteristics
Characteristics
Temperature
Thermal Shock
Low Temperature Operation
Short Time Overload
High Temperature Exposure
Resistance to Bonding Exposure
Solderability
Moisture Resistance
Life Test
Terminal Adhesion Strength
Resistance to Board Bending
Maximum Change
As Specified
±0.5% +0.01 ohm
±0.25% +0.01 ohm
±0.5% +0.01 ohm
+1% for R>100K ohm
±0.5% +0.01 ohm
±0.25% 0.01 ohm
95% minimum coverage
±0.5% +0.01 ohm
±0.5% +0.01 ohm
±1% +0.01 ohm
no mechanical change
±1% +0.01 ohm
Test Method
MIL-R55342E Par 4.79 (-55°C =125°C)
MIL-R55342E Par 4.7.3 (-65°C +150°C, 5 cycles)
MIL-R-55342E Par 4.7.4 (-65°C @ working voltage)
MIL-R-55342E Par 4.7.5
2.5 x
√
PxR for 5 seconds
MIL-R-55342E Par 4.7.6 (+150°C for 100 hours)
MIL-R-55342E Par 4.7.7 (Reflow soldered to board at
260°C for 10 seconds)
MIL-STD-202, Method 208 (245°C for 5 seconds)
MIL-R-55342E Par 4.7.8 (10 cycles, total 240 hours)
MIL-R-55342E Par 4.7.10 (2000 hour at 70°C intermittent)
1200 gram push from underside of mounted chip
for 60 seconds
Chip mounted in center of 90mm long board, deflected
5mm so as to exert pull on chip for 10 seconds
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.
A subsidiary of
TT electronics plc
Issue C · 05.03
© 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
43
WELWYN [ WELWYN COMPONENTS LIMITED ]
