The ABB QVAR-5B1 (Part Number: 3AXD50000021068) is a genuine, high-quality printed circuit board (PCB) assembly manufactured by ABB OY DRIVES. Engineered for robust industrial applications, this board is a critical component for the reliable operation, voltage regulation, and EMC management of ABB drive systems. The assembly features a durable green PCB equipped with multiple precision pin headers and connectors (including X3, X5, X9, X4, and X111-X113) to ensure seamless system integration. It is fully populated with industrial-grade electronic components such as high-capacity cylindrical resistors, blue capacitors, securely mounted block components, and a protective blue relay. Designed with safety and longevity in mind, the QVAR-5B1 meets stringent industry standards, boasting a 94V-0 flammability rating and a Comparative Tracking Index (CTI) greater than 175 for superior electrical insulation.