u-blox SARA-G3 Series System Integration Manual page 160

Other pins and interfaces
All the module pins that are externally accessible on the device integrating SARA-G3 series module should
be included in the ESD immunity test since they are considered to be a port as defined in
489-1 [16]. Depending on applicability, to satisfy ESD immunity test requirements according to ESD
category level, all the module pins that are externally accessible should be protected up to ±4 kV for
direct Contact Discharge and up to ±8 kV for Air Discharge applied to the enclosure surface.
The maximum ESD sensitivity rating of all the other pins of the module is 1 kV (Human Body Model
according to JESD22-A114). Higher protection level could be required if the related pin is externally
accessible on the application board. The following precautions are suggested to achieve higher protection
level:
 A general purpose ESD
CT0402S14AHSG varistor) should be mounted on the related line, close to accessible point
UBX-13000995 - R06
SARA-G3 series - System Integration Manual
protection device (e.g. EPCOS
Objective Specification
ETSI EN 301
CA05P4S14THSG or EPCOS
Design-in
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