B59641A145A62 EPCOS Inc, B59641A145A62 Datasheet - Page 20

• Manufacturer Part Number: B59641A145A62
• Description: PTC Thermistor A 641A 145A 62
• Manufacturer: EPCOS Inc

Specifications of B59641A145A62

• Lead Free Status / Rohs Status: Compliant

Mounting instructions
1
1.1
Leaded PTC thermistors follow the solderability requirements of IEC 60068-2-20.
During soldering, care must be taken that the thermistors are not damaged by excessive heat.
The following maximum temperatures, maximum time spans and minimum distances have to be
observed:
Solderability
Resistance to
soldering heat
Distance to thermistor has to be 6 mm. Under more severe soldering conditions the resistance
may change. Soldering conditions for wave soldering are given in chapter 1.4.1.
1.2
In case of PTC thermistors without leads, soldering is restricted to devices which are provided
with a solderable metallization. The temperature shock caused by the application of hot solder
may produce fine cracks in the ceramic, resulting in changes in resistance.
In addition, soldering methods should be employed which permit short soldering times.
Soldering conditions for wave soldering are given in chapter 1.4.1.
1.3
The notes on soldering leadless thermistors also apply to the SMD versions (refer to
IEC 60068-2-58). Soldering conditions for wave soldering are given in chapter 1.4.1., for reflow
soldering in chapter 1.4.2.
1.3.1
(Sizes 0402, 0603, 0805, 1210)
As shown in the figure above, the terminations consists of three metallic layers. A primary chrome
layer provides for good electrical contact. "Leaching" is prevented by a nickel barrier layer. The
outer tin coating prevents corrosion of the nickel and ensures good component solderability.
Please read Cautions and warnings and
Important notes at the end of this document.
Sensors
Limit temperature sensors, EIA sizes 0402, 0603 and 0805
Soldering
Leaded PTC thermistors
Leadless PTC thermistors
SMD PTC thermistors
Chrome/nickel/tin terminations
Solder containing lead
(SnPb 60/40)
Solder bath temperature 230 C
Soldering time 3 s
Soldering iron temperature 350 C
Soldering time 3 s
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Lead-free solder
(Sn96.5Ag3Cu0.5)
Solder bath temperature 245 C
Soldering time 3 s
Solder bath temperature 260 C
Soldering time 10 s
Superior series