Introduction to Circuit Protection
Introduction to Circuit Protection
Transientology
94
2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Surface Mount Fuses
154 Series
NANO2 > 154 OMNI-BLOK Fuse and Holder Combination
Please refer to www.littelfuse.com/series/154.html
or /154T.html for current information.
LF
7 A
L F
3.81
(.150")
2.13
(.084")
REF.
10.62
(.418")
4.24
(.167")
9.73
(.383") REF.
3.81
(.150")
5.03
(.198")
1 5 5
FUSE
Recommended Pad Layout
Dimensions
Packaging
Packaging Option
Packaging Specification
Quantity
Quantity &
Packaging Code
Reel Pack
EIA RS–481–2 (IEC 286, part 3)
1500
DR
Soldering Parameters
Time
Te
mperatur
e
TP
TL
TS(max)
TS(min)
25
tP
tL
tS
time to peak temperature
(t 25C to peak)
Ramp-down
Ramp-up
Preheat
Critical Zone
TL to TP
Part Numbering System
0154 001. D R T L
SERIES
AMP Code
QuANTITy Code
PACkAgINg Code
Refer to Ordering information
section on previous page.
D = 1500 pcs
R = Tape and Reel
Example:
1.5 amp Fast-acting
product is 015401.5DR.
1.5 amp Time-lag product
is 015401.5DRT.
(1 amp product shown
above).
TyPE Code
“L” suffix for
Black Color Holder
T = Time-Lag (Slo-Blo)
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 (LiquidusTemp
(T
L) to peak)
5°C/second max.
T
S(max) to TL - Ramp-up Rate
5°C/second max.
Reflow
-Temperature (T
L) (Liquidus)
217°C
-Temperature (t
L)
60 – 90 seconds
PeakTemperature (T
P)
250+0/-5 °C
Time within 5°C of actual peak
Temperature (t
p)
20 – 40 seconds
Ramp-down Rate
5°C/second max.
Time 25°C to peakTemperature (T
P)
8 minutes max.
Do not exceed
260°C
Product Characteristics
Operating
Temperature
-55C to 125C