{"type_number":"5Z3P","canonical_url":"https://tubeofile.com/tubes/5Z3P","manufacturer":"Shuguang","tube_type_key":"rectifier","tube_type_display_name":"Rectifier","base_name":"Octal","description":"Full-wave vacuum rectifier with directly heated oxide cathode. Chinese (Shuguang) production equivalent of the 5U4G, designed for low-power full-wave rectification in audio amplifiers and radio receivers. Octal base version of the classic 5Z3 design.","is_directly_heated":true,"completeness":"high","notes":["Directly heated (filament cathode) — observe heater warm-up time before applying B+ to protect the tube and filter capacitors.","The 5Z3P is a modern Chinese octal-base version of the classic 5Z3 (which used a UX4 base). Electrically equivalent to the 5U4G.","The Chinese datasheet specifies a minimum external anode circuit resistance of 2 kΩ and a maximum filter capacitor of 4 µF for capacitor-input operation.","Available in several quality grades: J (military general), T (military special), Q (high reliability). The 5Z3P-J and 5Z3PAT are military-grade variants.","Voltage drop is not explicitly stated in the Chinese datasheet; the value listed is estimated from the output voltage curves and is consistent with 5U4G data (~44–47 V at rated current)."],"references":["https://www.r-type.org/pdfs/5z3p.pdf","https://www.r-type.org/exhib/aag0056.htm"],"source_urls":{"r_type":"https://www.r-type.org/exhib/aag0056.htm","tdsl":"https://tdsl.duncanamps.com/show.php?des=5Z3P","radiomuseum":"https://www.radiomuseum.org/tubes/tube_5z3p.html"},"raw_equivalents":["5U4G","5Z3PA","5Z3PAT","5Ц3С","U52","274B","CV575"],"equivalents":[{"type_number":"5U4G","equivalence_type":"direct","notes":null}],"similar":[],"pins":[{"pin_number":"1","function":"No Connection","function_code":"nc","notes":null},{"pin_number":"2","function":"Filament","function_code":"h","notes":null},{"pin_number":"3","function":"No Connection","function_code":"nc","notes":null},{"pin_number":"4","function":"Anode 2 (Plate 2)","function_code":"a2","notes":null},{"pin_number":"5","function":"No Connection","function_code":"nc","notes":null},{"pin_number":"6","function":"Anode 1 (Plate 1)","function_code":"a1","notes":null},{"pin_number":"7","function":"No Connection","function_code":"nc","notes":null},{"pin_number":"8","function":"Filament","function_code":"h","notes":null}],"specs":[{"key":"Vh","display_name":"Heater Voltage","value":"5.0","numeric_value":"5","unit":"V","param_group":"heater"},{"key":"Ah","display_name":"Heater Current","value":"3.0","numeric_value":"3","unit":"A","param_group":"heater"}],"sections":[{"section_number":1,"section_label":"Rectifier","tube_type_key":"rectifier","specs":[{"key":"Va_max","display_name":"Anode Voltage (max)","value":"500","numeric_value":"500","unit":"V","param_group":"absolute_max"},{"key":"PIV","display_name":"Peak Inverse Voltage","value":"1550","numeric_value":"1550","unit":"V","param_group":"rectifier"},{"key":"Vdrop","display_name":"Voltage Drop (typical)","value":"47","numeric_value":"47","unit":"V","param_group":"rectifier"},{"key":"C_max","display_name":"Max C-input Filter Capacitor","value":"4","numeric_value":"4","unit":"µF","param_group":"rectifier"},{"key":"Ia_peak","display_name":"Peak Anode Current (surge)","value":"750","numeric_value":"750","unit":"mA","param_group":"rectifier"},{"key":"Idc_max","display_name":"Max DC Output Current (total, not per-anode)","value":"250","numeric_value":"250","unit":"mA","param_group":"rectifier"}]}],"synced_at":"2026-04-08T07:51:16.715Z"}