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© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 03/03/17
Surface Mount Fuses
159 Fuse and Clip Series
Materials
Fuse Body: Ceramic
Fuse Caps/Terminals:
Silver-plated Brass
Clip Base: Gold-plated
Clip Terminals: Nickel-plated
Product Marking Brand Logo, Current Rating, 'T'
Insulation Resistance
(after opening)
MIL-STD-202, Method 302, Test
condition A (10,000 ohms, minimum)
Operating
Temperature
-55°C to 125°C with proper re-rating
Humidity Test 85°C/ 85% RH, 1000 hours
Solderability
MIL-STD-202, Method 208/IPC EIA
J-STD-002, Test Condition A
Resistance to
Solvents
MIL-STD-202, Method 215 (3 solvent
types)
Thermal Shock
MIL-STD-202, Method 107, Test Condition
B3 (95 cycles -65°C to +125°C)
Mechanical Shock
MIL-STD-202, Method 213, Test
Condition I (100G’s peak for 6 msecs.)
Vibration MIL-STD-202, Method 201, (10-55 Hz)
Moisture Resistance
MIL-STD-202, Methold 106, High
Humidity (90-98% RH), Heat (65°C)
Salt Spray/
Atmosphere
MIL-STD-202, Method 101, Test
Condition B (48 hours)
Terminal Attachment
MIL-STD-202, Method 211, Test
Condition A, 5 lbs applied to end caps
Product Characteristics
Reflow Condition Pb – free assembly
Pre Heat
- Temperature Min (T
s(min)
) 150°C
- Temperature Max (T
s(max)
) 200°C
- Time (Min to Max) (t
s
) 60 – 120 seconds
Average Ramp-up Rate (Liquidus Temp
(T
L
) to peak)
3°C/second max.
T
S(max)
to T
L
- Ramp-up Rate 3°C/second max.
Reflow
- Temperature (T
L
) (Liquidus) 217°C
- Temperature (t
L
) 60 – 90 seconds
Peak Temperature (T
P
) 260
+0/–5
°C
Time within 5°C of actual peak
Temperature (t
p
)
20 – 40 seconds
Ramp-down Rate 6°C/second max.
Time 25°C to peak Temperature (T
P
) 8 minutes max.
Do not exceed 260°C
Soldering Parameters
Packaging
Part Numbering System
Packaging Option Packaging Specification Quantity Quantity & Packaging Code
24mm Tape and Reel EIA RS-481-2 (IEC 286, part 3) 1000 MR
0159 1.25 M R
SERIES
AMP Code
QUANTITY Code
PACKAGING Code
Refer to Electrical
Characteristics table
M = 1000 pcs
R = Tape and Reel
Example:
0.5 amp product
is 0159 .500 MR
(1.25 amp shown)
Dimensions
3.12
[0.123]
4.80
[0.189]
4.80 [0.189]
L
1.25 A T
F
10.90 [0.429]
10.10 [0.398]
13.00
[0.512]
3.88
[0.153]
4.40
[0.173]
4.30
[0.169]
4.90 [0.193]
"A"
"B"
.004
3.50 [0.138] 3.12 [0.123]
4.80 [0.189]
4.00 [0.157]
3.00
[0.118]
1.70
[0.067]
Recommended Pad Layout
Time
Temperature
T
P
T
L
T
S(max)
T
S(min)
25
t
P
t
L
t
S
time to peak temperature
(t 25ºC to peak)
Ramp-down
Ramp-up
Preheat
Critical Zone
T
L
to T
P
Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and
test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications.
Read complete Disclaimer Notice at www.littelfuse.com/disclaimer-electronics.