221301 - Miller IGBT to Capacitor Negative Bus Bar

Reliable Electrical Connections for Miller Welders

The Miller 221301 Bus Plate is a critical internal component designed for specific Miller inverter-based welding power sources. This bus plate serves as the electrical bridge between the Insulated-Gate Bipolar Transistor (IGBT) modules and the negative terminal of the capacitor bank. In modern welding machines, the integrity of the DC link is paramount for stable arc performance and machine reliability. This precision-engineered plate ensures that high-current power flows efficiently without resistance or overheating.

When internal electrical components fail or corrode, it can lead to erratic welding output or complete machine shutdown. Replacing a damaged bus connection with a genuine Miller part guarantees that the dimensions, material conductivity, and mounting points match the original factory specifications exactly. This part is essential for technicians performing board-level repairs or replacing power modules within the welder.

Key Benefits:

• OEM Quality: Manufactured by Miller Electric to meet strict tolerance and material standards.


• Direct Fit: Designed to align perfectly with the IGBT and capacitor terminals for a hassle-free installation.


• Safety: Proper bus bars prevent arcing and overheating inside the power source enclosure.

Trust Josef Gas for your genuine Miller replacement parts to keep your industrial equipment running at peak performance.