Littelfuse 451 Series Bedienungsanleitung PDF herunterladen (Seite 3)

Speciﬁcations are subject to change without notice.

Revised: 02/20/14

Surface Mount Fuses

NANO

2®

> Very Fast-Acting > 451/453 Series

Average Time Current Curves

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

0.001

0.01

0.1

100

0.01 0.1 1 10 100 1000 10000

TIME IN SECONDS

CURRENT IN AMPS

10A

12A

6.3A

15A

3.5A

3.15A

2.5A

1.5A

1.25A

800mA

750mA

630mA

500mA

375mA

400mA

315mA

250mA

200mA

100mA

125mA

160mA

80mA

62mA

1.6A

Note:

1. Deratingdepictedinthiscurveisinadditiontothestandardderatingof25%for

continuous operation.

Wave Soldering Parameters

260°CPeak

Temperature,

10 seconds max.

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 4

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