The Miller 225516 is a high-performance Silicon (Si) Rectifier assembly engineered specifically for three-phase industrial welding power sources. This critical internal component is responsible for rectifying Alternating Current (AC) into Direct Current (DC), a fundamental process for establishing stable and effective welding arcs in DC welding applications. The unit is rated for a substantial 300 Amps of output current, making it suitable for heavy-duty machinery that requires consistent power delivery.
Technical specifications for this unit include a Peak Inverse Voltage (PIV) rating of 400V, which provides a safety margin against voltage spikes and reverse bias conditions common in welding environments. Notably, the rectifier carries a 100% duty cycle rating at 300 Amps, indicating it can operate continuously at its full rated capacity without thermal failure, provided the machine's cooling system is functioning correctly. This level of durability is essential for industrial fabrication settings where downtime must be minimized.
As a genuine Miller Electric replacement part, the 225516 ensures seamless compatibility with specific Miller power sources. Using OEM components guarantees that the electrical characteristics—such as forward voltage drop and thermal dissipation—match the original engineering design of the welder. Installation of this rectifier restores the machine's ability to produce smooth DC output. Technicians are strongly advised to verify fitment by cross-referencing the machine's serial number and parts manual before installation to ensure this specific 3-phase assembly is the correct match for the equipment.
| Additional Information |
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| Packaging Description:1 Per Ea |
| Amperage Rating:300 A |
| Phase:3-Phase |
| Duty Cycle:100 |
| Component Type:Silicon Rectifier |
