Littelfuse 485 Series Manual de usuario descargar pdf (Pagina 2)

Speciﬁcations are subject to change without notice.

Revised: 01/23/14

Surface Mount Fuses

Nano

2®

> 600VDC > Fast-Acting 485 Series

Average Time Current CurvesTemperature Rerating Curve

TIME IN SECONDS

CURRENT IN AMPERES

0.001

0.01

0.1

100

0.1 1 10 100 100

2.5A

3.15A

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

) 60–180ses

Average Ramp-up Rate (Liquidus Temp

) to peak)

5°C/secondmax.

S(max)

to T

- Ramp-up Rate 5°C/secondmax.

Reﬂow

- Temperature (T

) (Liquidus) 217°C

- Temperature (t

) 60–150seconds

Peak Temperature (T

) 260

+0/–5

°C

Time within 5°C of actual peak

Temperature (t

)

20–40seconds

Ramp-down Rate 5°C/secondmax.

Time 25°C to peak Temperature (T

) 8minutesmax.

Do not exceed 260°C

Soldering Parameters - Reﬂow Soldering

Time

Temperature

S(max)

S(min)

time to peak temperature

(t 25ºC to peak)

Ramp-down

Ramp-up

Preheat

Critical Zone

to T

1 2 3

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Littelfuse 485 Series Manual de usuario Pagina 2

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