Overview
Manuals
Key Features and Applications
Operating principle
Features:
- The ABB 5SDD0120C0200 is an industrial-grade, high-current planar resistance-welding diode manufactured by ABB
- It uses a traditional "hockey-puck" or press-pack package
- It is designed for high-power rectification and industrial welding equipment at medium frequencies (up to 2000 Hz)
The ABB 5SDD0120C0200 is a high-performance, medium-frequency, high-current rectifier diode (commonly known as a planar welding diode) designed for industrial-grade high-power rectification. Its core function is as a high-current core rectifier component in medium-frequency (up to 2000 Hz) resistance welding equipment and industrial DC power supply systems. This diode has extremely high current-carrying capacity, with a rated average forward current (IFAVm) up to 11000A and a repetitive peak reverse voltage (VRRM) up to 200V. This enables equipment such as medium-frequency spot welders, seam welders, or high-frequency inverter DC welders to stably and efficiently convert medium-frequency AC power into high-energy DC power for field welding.
In addition to its excellent current-carrying capacity, this diode also features outstanding low-loss characteristics and thermal cycling stability. This device employs an extremely low forward conduction voltage (VF0 of only about 0.75V) and ultra-low internal resistance (rF of only 0.020 mΩ), significantly reducing conduction and reverse recovery losses during operation, thereby greatly improving the overall system's energy conversion efficiency.
The 5SDD0120C0200 ABB Welding Diode Module may still be available for purchase and support from Moore Automated Company beyond End-Of-Life (EOL) by the manufacturer (OEM).
ABB 5SDD0120C0200 Welding Diode Module manual(Datasheets), Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Extremely Low Losses: Optimized design achieves ultra-low forward voltage drop and extremely low forward and reverse recovery losses, significantly improving energy conversion efficiency.
High Thermal Cycling Life: The robust ceramic and metal sealing structure can withstand frequent and demanding power switching cycles and alternating high and low temperature cycles during welding, with an operating temperature range of -40°C to +170°C.
Typical Applications: Primarily used in high-frequency, high-current welding power supplies, such as medium-frequency spot welders, projection welders, and industrial seam welders, as well as large low-voltage, high-current rectifiers.
Based on the unidirectional conductivity of the semiconductor PN junction and its efficient heat dissipation mechanism achieved through planar mechanical pressing, the PN junction conducts under forward bias (external anode voltage higher than cathode voltage), allowing currents up to tens of thousands of amperes to flow from the anode to the cathode, achieving efficient power transfer through extremely low on-resistance.
Under reverse bias, the PN junction is cut off, blocking peak voltages up to 200V and preventing reverse current flow. Because the internal silicon wafer generates significant Joule heat during high-frequency switching at 2kHz, its planar structure, through precise external mounting and clamping forces, ensures perfect and tight electrical and thermal contact between the internal silicon wafer and the external large copper heatsink (air-cooled or water-cooled).
This double-sided cooling mechanism rapidly dissipates the heat generated by the PN junction, ensuring that the PN junction does not overheat and become damaged under continuous high-frequency, high-current pulses.
