ESD safety for shipping industrial inverters and power assemblies — complete packaging and handling protocol

ESD damage on power boards frequently manifests hours or days after the discharge event, making root-cause attribution extremely difficult. This article provides a complete handling and shipping protocol for sensitive power electronics. Section one explains safe DC bus capacitor discharge: required wait times based on nominal capacitance, selection of discharge resistor value and power rating, and verification with an isolated voltmeter. Section two covers ESD packaging standards — double-layer conductive bags, anti-static foam inserts, temporary ground bonding straps, and the prohibition of placing boards on resin or standard plastic surfaces. Section three addresses correct carrier labelling: ESD-sensitive symbols, package orientation marks, temperature and humidity limits, and the no-stacking requirement for containers without climate control. Section four explains pre-shipment photographic documentation to streamline laboratory receiving inspection and establish a condition baseline for insurance and warranty claims. The article concludes with a comparison of the cost of proper packaging materials versus the average repair cost increase caused by transit-induced ESD damage.