© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Surface Mount Fuses
Thin Film > 1206 Size > Very Fast-Acting > 466 Series
Average Time Current Curves
TIME IN SECONDS
CURRENT IN AMPERES
Reflow Condition Pb – free assembly
- Temperature Min (Ts(min))150°C
- Temperature Max (Ts(max))200°C
- Time (Min to Max) (ts)60 – 180 seconds
Average Ramp-up Rate (Liquidus Temp
(TL) to peak) 5°C/second max.
TS(max) to TL - Ramp-up Rate 5°C/second max.
Reflow - Temperature (TL) (Liquidus) 217°C
- Temperature (tL)60 – 150 seconds
Peak Temperature (TP)260+0/-5 °C
Time within 5°C of actual peak
Temperature (tp)20 – 40 seconds
Ramp-down Rate 5°C/second max.
Time 25°C to peak Temperature (TP)8 minutes max.
Do not exceed 260°C
Temperature Re-rating Curve
Wave Soldering 260°C, 10 seconds max.
1. Re-rating depicted in this curve is in addition to the standard re-rating of 25% for
For continuous operation at 70 degrees celsius, the fuse should be rerated as follows:
I = (0.75)(0.80)IRAT = (0.60)IRAT
2. The temperature derating curve represents the nominal conditions. For questions
about temperature derating curve, please consult Littelfuse technical support for
time to peak temperature
(t 25ºC to peak)
TL to TP
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