Quectel SG865W Series Hardware Design page 111

Table 51: Recommended Thermal Profile Parameters
Factor
Soak Zone
Max slope
Soak time (between A and B: 150 ° C and 200 ° C)
Reflow Zone
Max slope
Reflow time (D: over 217 ° C)
Max temperature
Cooling down slope
Reflow Cycle
Max reflow cycle
NOTE
1. 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.
2. Avoid using ultrasonic technology for module cleaning since it can damage crystals inside the module.
3. Due to the complexity of the SMT process, please contact Quectel Technical Supports in advance for
any situation that you are not sure about, or any process (e.g. selective soldering, ultrasonic
soldering) that is not mentioned in document [4].
SG865W_Series_Hardware_Design
Smart Module Series
Recommendation
1–3 ° C/s
70–120 s
1–3 ° C/s
40–70 s
235 ° C to 246 ° C
-1.5 to -3 ° C/s
1
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