Eaton
Electronics Division
1000 Eaton Boulevard
Cleveland, OH 44122
United States
Eaton.com/electronics
© 2019 Eaton
All Rights Reserved
Printed in USA
Publication No. 4398 PCN19016
November 2019
Technical Data 4398
Effective November 2019
PTS1812
6-60 Volt DC surface mount resettable PTC devices
Life Support Policy: Eaton does not authorize the use of any of its products for use in life support devices or systems without the express written
approval of an officer of the Company. Life support systems are devices which support or sustain life, and whose failure to perform, when properly used
in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user.
Eaton reserves the right, without notice, to change design or construction of any products and to discontinue or limit distribution of any products. Eaton also
reserves the right to change or update, without notice, any technical information contained in this bulletin.
Solder reflow profile
Table 1 - Standard SnPb solder (Tc)
Package
thickness
Volume
mm3
<350
Volume
mm3
≥350
<2.5 mm) 235 °C 220 °C
≥2.5 mm 220 °C 220 °C
Table 2 - Lead (Pb) free solder (Tc)
Package
thickness
Volume
mm3
<350
Volume
mm3
350 - 2000
Volume
mm3
>2000
<1.6 mm 260 °C 260 °C 260 °C
1.6 – 2.5 mm 260 °C 250 °C 245 °C
>2.5 mm 250 °C 245 °C 245 °C
Temperature
t
tP
ts
TC -5 °C
Time 25 °C to peak Time
°C
Tsmin
Tsmax
TL
TP
Preheat
Max. ramp up rate = 3 °C/s
Max. ramp down rate = 6 °C/s
Eaton is a registered trademark.
All other trademarks are property
of their respective owners.
Follow us on social media to get the
latest product and support information.
Reference J-STD-020
Profile feature Standard SnPb solder Lead (Pb) free solder
Preheat and soak • Temperature min. (Tsmin)100 °C 150 °C
• Temperature max. (Tsmax)150 °C 200 °C
• Time (Tsmin to Tsmax) (ts)60-120 seconds 60-120 seconds
Ramp up rate TL to Tp3 °C/ second max. 3 °C/ second max.
Liquidous temperature (Tl)
Time (tL) maintained above TL
183 °C
60-150 seconds
217 °C
60-150 seconds
Peak package body temperature (TP)* Table 1 Table 2
Time (tp)* within 5 °C of the specified classification temperature (Tc)20 seconds* 30 seconds*
Ramp-down rate (Tp to TL)6 °C/ second max. 6 °C/ second max.
Time 25 °C to peak temperature 6 minutes max. 8 minutes max.
* Tolerance for peak profile temperature (Tp) is defined as a supplier minimum and a user maximum.