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48 SMT007 MAGAZINE I OCTOBER 2026 Power electronics board manufacturers typically detect defects using a sequential testing strategy: In-Circuit Test (ICT) verifies component place- ment, soldering integrity, and electrical continuity before the board is powered on, while Functional Test (FCT) applies input power, control signals, and varying loads to verify the board regulates power correctly and performs as intended under real oper- ating conditions. Although this sequence is well established for many production lines, not all test equipment can handle the unique barriers that next-genera- tion power assemblies present at the speed and volumes automotive manufacturing demands. These growing technological complexities include: 1. Bridging diverse technologies. Today's power electronics boards host an incredible mix of components, with high-power switches and heavy magnetics alongside delicate control ICs and high-speed communication interfac- es. Test equipment must be flexible enough to validate this wide array of components on a single assembly. 2. Managing high power requirements. Auto- motive power boards require testers capable of sourcing and controlling high voltages and high currents with precise synchroniza- tion and load control—instrumentation robust enough to safely stress components at real operating levels. 3. Mastering complex functional validation. Once that stress is applied, comprehensive functional testing must go far beyond basic point-to-point electrical continuity to evaluat- ing intricate control loops, measuring power conversion efficiency across operating rang- es, verifying thermal management under heavy loads, and stress-testing fault protec- tion circuits. Some functional testers aren't built to apply the dynamic loads or simulate the fault conditions required, leaving these deeper validation checks incomplete. 4. Enforcing uncompromising safety standards. Sourcing and measuring high voltage and current pose real hazards for both operators and test equipment. Test platforms must in- corporate hardware safety features and strict automatic protocols to protect both. 5. Navigating tall and heavy power board assem- blies. Unlike standard PCBAs, power board assemblies are dominated by tall, heavy, and bulky components that challenge handling and testing. Meeting strict automotive beat times requires testers capable of overcoming these physical weight and clearance barriers without sacrificing total test coverage. Meeting all five challenges at once is the real test. An electronic power board undergoes bed of nails functional test.