19
Chip Resistors Selection Charts
RC - Thick film general purpose chip resistors, 01005 to 2512
Environmental characteristics
Performance test Test method Procedure Requirements
Life
MIL-STD-202G-
method 108A
1 000 hours at 70 ±5°C applied RCWV
1.5 hours on, 0.5 hours off, still air required
01005:±(3%+0.05Ω)
<100mΩforjumper
Others: ±(1%+0.05Ω)for1%tol.
±(3%+0.05Ω)for5%tol.
<100mΩforjumper
High temperature exposure
MIL-STD-202G-
method 108A
1 000 hours at maximum operating temperature
dependingonspecication,unpowered
01005: ±(1%+0.05Ω)
<50mΩforjumper
Others: ±(1%+0.05Ω)for1%tol.
±(2%+0.05Ω)for5%tol.
<50mΩforjumper
Moisture resistance
MIL-STD-202G-
method 106F
Eachtemperature/humiditycycleisdenedas
8hours(method106F),3cycles/24hours
for10dwith25°C/65°C95%R.H
01005: ±(2.0%+0.05Ω)
<100mΩforjumper
Others: ±(0.5%+0.05Ω)for1%tol.
±(2%+0.05Ω)for5%tol.
<100mΩforjumper
Thermal shock
MIL-STD-202G-
method 107G
LCT/UCT,numberofcyclesrequiredis300
Maximum transfer time is 20 seconds
01005: ±(1%+0.05Ω)
<50mΩforjumper
Others: ±(0.5%+0.05Ω)for1%tol.
±(1%+0.05Ω)for5%tol.
<50mΩforjumper
Solderability
Wetting
J-STD-002B
testB
Electricaltestnotrequired.Magnication50X
Lead-free solder bath at 245 ±3°C
Dipping time: 3 ±0.5 seconds
Welltinned(≥95%covered)
No visible damage
Resistance to
soldering heat
MIL-STD-202G-
method 210F
Lead-free solder, 260°C, 10 seconds
immersion time
01005: ±(1%+0.05Ω)
<50mΩforjumper
Others: ±(0.5%+0.05Ω)for1%tol.
±(1%+0.05Ω)for5%tol.
<50mΩforjumper
No visible damage
Short time overload
MIL-R-55342D-
para 4.7.5
2.5 times RCWV or maximum overload voltage
whichever is less for 5 seconds at room
temperature
01005: ±(2%+0.05Ω)
<50mΩforjumper
Others: ±(1%+0.05Ω)for1%tol.
±(2%+0.05Ω)for5%tol.
<50mΩforjumper
No visible damage