Littelfuse 72R Series Manuel d'utilisateur télécharger pdf (Page 3)

Revised: July 12, 2010

POLYFUSE

Resettable PTCs

72R Series

Radial Leaded > 72R Series

Speciﬁcations are subject to change without notice.

Please refer to www.littelfuse.com/series/72R.html for current information.

72R Series

Environmental Speciﬁcations

Operating/Storage

Temperature

-40°C to +85°C

Maximum Device Surface

Temperature in Tripped State

125°C

Passive Aging

+85°C, 1000 hours

-/+5% typical resistance change

Humidity Aging

+85°C, 85% R.H. 1000 hours

-/+5% typical resistance change

Thermal Shock

+85°C to -40°C 10 times

-/+5% typical resistance change

Solvent Resistance MIL–STD–202, Method 215F

Moistrue Sesitivity Level Level 1, J–STD–020C

Physical Speciﬁcations

Lead Material

0.20-0.40A: Tin-plated Copper clad steel

0.50-3.75A: Tin-plated Copper

Soldering

Characteristics

Solderability per MIL–STD–202, Method

208E

Insulating Material

Cured, ﬂame retardant epoxy polymer

meets UL 94V-0 requirements.

Lead Solderability

Marked with ‘LF’, voltage, current rating,

and date code.

Soldering Parameters - Wave Soldering

Pre-Heating Zone

Refer to the condition recommended by

the ﬂux manufacturer.

Max. ramping rate should not exceed

4°C/Sec.

Soldering Zone

Max. solder temperature should not

exceed 260°C

Cooling Zone Cooling by natural convection in air.

Preheating

160

190

220

260

5 max.

Temperature (°C)

Soldering Cooling

60 min.

Time(s)

1 2 3 4 5 6 7

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Littelfuse 72R Series Manuel d'utilisateur Page 3

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