Surface Mount Fuses
Introduction to Circuit Protection
Transientology
159 Fuse and Clip Series
Soldering Parameters
tP
Reflow Condition
Pb – free assembly
TP
Critical Zone
TL to TP
Ramp-up
-Temperature Min (Ts(min)
)
150°C
TL
TS(max)
Pre Heat -Temperature Max (Ts(max)
-Time (Min to Max) (ts)
)
200°C
tL
60 – 120 seconds
Ramp-down
Average Ramp-up Rate (LiquidusTemp
(TL) to peak)
Preheat
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TS(min)
tS
TS(max) toTL - Ramp-up Rate
-Temperature (TL) (Liquidus) 217°C
-Temperature (tL) 60 – 90 seconds
25
Reflow
time to peak temperature
(t 25ºC to peak)
Time
PeakTemperature (TP)
250ꢔꢋꢆꢄꢐ °C
Time within 5°C of actual peak
Temperature (tp)
20 – 40 seconds
Part Numbering System
Ramp-down Rate
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8 minutes max.
260°C
0159 1.25 M R
Time 25°C to peakTemperature (TP)
Do not exceed
SERIES
AMP Code
Refer to Electrical
Example:
Characteristics table
0.5 amp product
is 0159 .500 MR
(1.25 amp shown)
Product Characteristics
QUANTITY Code
.ꢀꢕꢀꢊꢋꢋꢋꢀQDT
Fuse Body: Ceramic
PACKAGING Code
Fuse Caps/Terminals: Silver-plated Brass
Clip Base: Gold-plated
3ꢀꢕꢀ5BQFꢀBOEꢀ3FFM
Materials
ClipTerminals:ꢀ/JDLFMꢄQMBUFE
Dimensions
Product Marking
Brand Logo, Current Rating, 'T'
10.90 [0.429]
10.10 [0.398]
Insulation Resistance
(after opening)
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condition A (10,000 ohms, minimum)
3.12
[0.123]
Operating
Temperature
-55°C to 125°C with proper rerating
F
L
1.25 A
T
HumidityTest
Solderability
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1.70
[0.067]
3.00
[0.118]
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+ꢄ45%ꢋꢋꢍ"ꢈꢀ5FTUꢀ$POEJUJPOꢀ"
4.80
[0.189]
Resistance to
Solvents
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types)
MIL-STD-202, Method 107G, Test
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Thermal Shock
4.90 [0.193]
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Mechanical Shock
Condition I (100G’s peak for 6 msecs.)
.004
"B"
"A"
Vibration
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Recommended Pad Layout
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Moisture Resistance
4.40
[0.173]
Salt Spray/
Atmosphere
.*-ꢄ45%ꢄꢍꢋꢍ'ꢈꢀ.FUIPEꢀꢊꢋꢊꢈꢀ5FTUꢀ
Condition B (48 hours)
3.88
[0.153]
MIL-STD-202, Method 211, Test
Condition A, 5 lbs applied to end caps
Terminal Attachment
4.30
[0.169]
13.00
[0.512]
Packaging
Packaging Option
Packaging Specification
Quantity
1000
Quantity & Packaging Code
24mmTape and Reel
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MR
© 2009 Littelfuse, Inc.
159 Series
106
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/159.html for current information.