Generate a perfectly fitted, 3D-printable case for your Adafruit INA219 Current Sensor Adafruit Breakout. Verified 25.6x20.4mm base dimensions with Above-board dominated by screw-terminal height (~7mm).
INA219 itself dissipates ~2mA; however, the onboard 0.1Ω shunt resistor dissipates I²R — at 3.2A continuous (max rated), that's ~1W in a 0805 package, requiring thermal relief. Airflow is advisory, not mandatory, but below-board clearance is load-bearing.
PETG handles the local temperature rise above the shunt resistor under typical load. ABS tolerates higher sustained dissipation for continuous monitoring applications. PC is preferred when the INA219 is mounted in a sealed battery-monitoring enclosure where the shunt runs near its rated limit.
Screw terminals MUST be accessible for cable landing — they cannot be reliably reached after assembly.
Shunt resistor dissipates ~1W at rated current — below-board contact with enclosure floor causes heat buildup and resistance drift.
Current path (VIN+ → load → VIN-) must use adequate gauge wire; INA219 PCB traces handle up to 3.2A but external wiring is the limiter.
If measuring high-side current on non-grounded supplies, verify INA219 common-mode rating (+26V max) — exceeding it damages the IC silently.
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Mechanical properties are estimates. Validate critical loads before use.