462 Datasheet, PDF (2/3 Pages) Littelfuse – 250V/350V VAC/VDC Time Lag Fuse

Surface Mount Fuses
NANO^2® > 250V/350V VAC/VDC Time Lag Fuse > 462 Series
Temperature Re-rating Curve
Average Time Current C⁴u⁶²rv^See^ris^es
Note:
1. Rerating depicted in this curve is in addition to the standard derating of 25% for
continuous operation.
Soldering Parameters
Reflow Condition
Pb – free assembly
- Temperature Min (T_s(min))
Pre Heat - Temperature Max (T_s(max))
- Time (Min to Max) (t_s)
Average Ramp-up Rate (Liquidus Temp
(T_L) to peak)
T_S(max) to T_L - Ramp-up Rate
Reflow
- Temperature (T_L) (Liquidus)
- Temperature (t_L)
Peak Temperature (T_P)
Time within 5°C of actual peak
Temperature (t_p)
Ramp-down Rate
Time 25°C to peak Temperature (T_P)
150°C
200°C
60 – 120 seconds
5°C/second max.
5°C/second max.
217°C
60 – 90 seconds
250^+0/-5 °C
20 – 40 seconds
5°C/second max.
8 minutes max.
100000
10000
1000
100
10
1
0.1
0.01
0.001
0.1
1
10
100
CURRENT IN AMPERES
T_P
T_L
T_S(max)
Ramp-up
T_S(min)
Preheat
t_S
25
time to peak temperature
(t 25ºC to peak)
t_P
Critical Zone
TL to TP
t_L
Ramp-down
Time
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 06/12/15