Littelfuse 464 Series Bedienungsanleitung PDF herunterladen (Seite 2)

Speciﬁcations are subject to change without notice.

Revised: 12/19/13

Surface Mount Fuses

NANO

2®

> 250V vvUMF > Fast-Acting > 464 Series

Average Time Current Curves

100

0.1

0.01

0.001

1000

0.1

1.00

1.25

1.60

2.00

2.50

3.15

TIME IN SECONDS

CURRENT IN AMPERES

4.00

5.00

6.30

.50 A

.80 A

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 – 120 secs

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 – 90 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

Temperature Rerating Curve

Wave Soldering Parameters

260°C Peak

Temperature,

10 seconds max.

Note:

1. Derating depicted in this curve is in addition to the standard derating of 15% for

continuous operation.

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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