Stud mount rectifier diodes, 1200V rating, available in 25A to 85A positive and negative stud versions for reliable power control Product overview These stud diode rectifiers provide a voltage rating and a wide current selection to meet industrial and commercial power conversion needs. Available in positive cathode HF series and negative anode HFR series, they offer robust surge handling and straightforward installation in stud mount configurations. Key benefits voltage and current capability: 1200V rating with continuous current options of 25A, 40A, 50A, 70A, and 85A to match a variety of power requirements. Strong surge performance: Designed to tolerate inrush and temporary overloads, reducing risk during start up or transient events. Simple installation and maintenance: Stud mount design enables secure mechanical and electrical connection, making replacement and servicing fast and dependable. Stable, efficient operation: Built from grade semiconductor materials for good thermal stability, low forward voltage drop, and fast recovery characteristics that help maintain conversion efficiency under varying loads. Flexible polarity options: HF models provide positive pole configuration, HFR models provide negative pole configuration to fit different circuit topologies. Available models and ratings Positive electrode HF series 25HF 120: 1200V, 25A 40HF 120: 1200V, 40A 50HF 120: 1200V, 50A 70HF 120: 1200V, 70A 85HF 120: 1200V, 85A Negative electrode HFR series 25HFR 120: 1200V, 25A 40HFR 120: 1200V, 40A 50HFR 120: 1200V, 50A 70HFR 120: 1200V, 70A 85HFR 120: 1200V, 85A Applications and practical use scenarios Battery charging system: Use a 50HF 120 or 50HFR 120 in a battery charger or charging rack to provide reliable rectification with good surge tolerance during initial charge cycles. Welding machine or power converter: surge capability and 1200V rating make the 70HF 120 or 85HF 120 suitable for welding power supplies and industrial converters where current spikes occur. Motor controls and machine tool circuits: The stud mount format and available polarities allow easy integration into motor drive modules and machine tool control panels for dependable rectification and long term operation. Installation and handling Mount to a suitable chassis or heat sink using the stud connection for mechanical strength and efficient thermal transfer. Ensure correct polarity selection HF for positive pole or HFR for negative pole according to circuit design. Regular visual checks and proper thermal management will support long service life. Package contents 1 x stud diode rectifier Sizing note Size as shown in the picture. Select the model that matches the required current rating and polarity for your application.