0453003.MR datasheet(3/4 Pages) LITTELFUSE

3 / 4 page

Specifications are subject to change without notice.

Surface Mount Fuses

451/453 Series

NANO2® > Very Fast-Acting > 451/453 Series

Please refer to www.littelfuse.com/series/451.html

or /453.html for current information.

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

L) to peak

5°C/second max.

S(max) to TL - Ramp-up Rate

5°C/second max.

Reflow

- Temperature (T

L) (Liquidus)

217°C

- Temperature (t

60 – 90 seconds

Peak Temperature (T

250+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

1000.000

100

0.1

0.01

0.001

0.05 0.1

110100

1000

CURRENT IN AMPERES

Note:

1.Deratingdepictedinthiscurveisinadditiontothestandardderatingof25%for

continuous operation.

Wave Soldering Parameters

260°CPeak

Temperature,

10 seconds max.

Time

TS(max)

TS(min)

time to peak temperature

(t 25ºC to peak)

Ramp-down

Ramp-up

Preheat

Critical Zone

TL to TP

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