Littelfuse 250S Series Manuel d'utilisateur télécharger pdf (Page 3)

Revised: July 29, 2012

POLY-FUSE

Resettable PTCs

250S Series

Surface Mount > 250S Series

250S Series

Speciﬁcations are subject to change without notice.

Please refer to www.littelfuse.com/series/250S.html for current information.

Soldering Parameters

1SPmMF'FBUVSF 1C'SFF"TTFNCMZ

"WFSBHF3BNQ6Q3BUF5

S(max)

to T

) 3°C/second max

Pre Heat:

Temperature Min (T

s(min)

)

150°C

Temperature Max (T

s(max)

)

200°C

Time (Min to Max) (t

)

60 – 180 secs

Time Maintained

Above:

Temperature (T

)

217°C

Temperature (t

)

60 – 150 seconds

Peak / Classiﬁcation Temperature (T

) 260

+0/-5

°C

Time within 5°C of actual peak

Temperature (t

)

20 – 40 seconds

Ramp-down Rate 6°C/second max

Time 25°C to peak Temperature (T

) 8 minutes Max.

-- All temperature refer to topside of the package, measured on the package body surface

-- If reﬂow temperature exceeds the recommended proﬁle, devices may not meet the

performance requirements

3FDPNNFOEFESFnPXNFUIPET*3WBQPSQIBTFPWFOIPUBJSPWFO/

environment

for lead

-- Recommended maximum paste thickness is 0.25mm (0.010 inch)

-- Devices can be cleaned using standard industry methods and solvents

-- Devices can be reworked using the standard industry practices

Environmental Speciﬁcations

Operating/Storage

Temperature

-40°C to +85°C

Maximum Device Surface

Temperature in Tripped State

125°C -/+10ºC

Passive Aging +85°C, 1000 hours

Humidity Aging +85°C, 85%,R.H.,1000 hours

Thermal Shock

.*-o45%o'.FUIPE(

+125°C to -55°C 10 times

Solvent Resistance .*-o45%o.FUIPE'

Moisture Sensitivity Level -FWFM+o45%o$

Physical Speciﬁcations

Terminal Material

Solder-Plated Copper (Solder Material:

Matte Tin(Sn))

Lead Solderability

.FFUT&*"4QFDJmDBUJPO34&"/4*

J-STD-002 Category 3.

1 2 3 4 5

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Littelfuse 250S Series Manuel d'utilisateur Page 3

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