NB-IoT
Module Series
BC660K-GL Hardware Design
BC660K-GL_Hardware_Design 53 / 57
Table 28: Recommended Thermal Profile Parameters
1. During manufacturing and soldering, or any other processes that may contact the module directly,
NEVER wipe the module’s shielding can with organic solvents, such as acetone, ethyl alcohol,
isopropyl alcohol, trichloroethylene, etc. Otherwise, the shielding can may become rusted.
2. The shielding can for the module is made of Cupro-Nickel base material. It is tested that after 12
hours
’ Neutral Salt Spray test, the laser engraved label information on the shielding can is still
clearly identifiable and the QR code is still readable, although white rust may be found.
3. If a conformal coating is necessary for the module, do NOT use any coating material that may
chemically react with the PCB or shielding cover, and prevent the coating material from flowing into
the module
7.3. Tape and Reel Packaging
The modules are stored in a vacuum-sealed bag which is ESD-proof. The bag should not be opened until
the modules are ready to be soldered onto the application.
The reel is 330 mm in diameter and each reel contains 250 modules.
Factor
Recommendation
Soak Zone
Max slope
1
–3 °C/s
Soak time (between A and B: 150 °C and 200 °C)
70
–120 s
Reflow Zone
Max slope
2
–3 °C/s
Reflow time (D: over 220 °C)
45
–70 s
Max temperature
238 °C to 246 °C
Cooling down slope
-1.5 to -3 °C/s
Reflow Cycle
Max reflow cycle
1
NOTES
