Emerson 02-779857-22 REV.M P/L A Snubber Circuit Board

The Emerson 02-779857-22 REV.M P/L A Snubber Circuit Board is an energy-absorbing and voltage-suppression module used in Liebert and Emerson UPS systems. It protects semiconductor components such as IGBTs or SCRs from voltage spikes and switching transients, improving reliability and longevity of power conversion circuits. Technical Specifications: Manufacturer: Emerson Network Power (Liebert Division) Model Number: 02-779857-22 Revision: REV.M (P/L A) Product Type: Snubber Circuit Board Function: Protects power semiconductors by absorbing voltage spikes during high-speed switching operations Circuit Type: RC (resistor-capacitor) snubber network Main Components: – High-power wirewound resistor – Film capacitor (metalized polypropylene type) – PCB and terminal connectors Resistance Value: Typically between 50–200 Ω (design dependent) Capacitance Value: Typically between 0.1–1.0 µF (design dependent) Voltage Rating: Up to 600–1000V DC (depending on UPS system) Power Dissipation: High-power resistor rated for continuous energy absorption under transient load PCB Material: FR4 glass epoxy laminate, high dielectric strength Mounting Type: Chassis or panel-mounted with aluminum base plate for heat dissipation Connection Type: Soldered or terminal lead wires for integration in UPS systems Operating Temperature Range: -10°C to +85°C (14°F to 185°F) Cooling Method: Passive, air-cooled design Applications: Liebert/Emerson UPS systems, inverters, and power conditioning units Quality Assurance: Tested under Emerson standards for surge endurance and circuit integrity Manufacture Country: USA Please review pictures carefully and let us know if you have any questions!