Littelfuse 159 Series - Manual (Page 4)

© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/19/13
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 rerating
Humidity Test 85°C/ 85% RH, 1000 hours
Solderability
MIL-STD-202, Method 208/IPC EIA
J-STD002A, Test Condition A
Resistance to
Solvents MIL-STD-202, Method 215 (3 solvent
types)
Thermal Shock
MIL-STD-202, Method 107G, 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-202F, 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 [0.1
89] 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 [0.1
38]
3.1
2 [0.1
23]
4.80 [0.1
89]
4.0
0 [0.1
57]
3.00
[0.118]
1.70
[0.067]
Recommended Pad Layout
Time
Te
mperatur
e
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