The 2N3904 is a common NPN bipolar junction transistor used for general-purpose low-power amplifying or switching applications.    It is designed for low current and power , medium voltage , and can operate at moderately high speeds.
MOC3063SM – Optoisolator Triac Output 4170Vrms 1 Channel 6-SMD from ON Semiconductor. Pricing and Availability on millions of electronic components from Digi-Key Electronics. English
At 20mA, that's about 120 Ohms. The current gain depends on the collector current, but figure on 50. With a base current of 20mA, that's a collector current of way more than the 2N3904 can handle, so 20mA will saturate it thoroughly. You can probably get by with a lower base current. Look at a 2N3904 datasheet for gain at different collector ... 2N6004 Datasheet (PDF) 5.1. l2n600.pdf Size:395K _lrc LESHAN RADIO COMPANY, LTD. 600V N-Channel Enhancement-Mode MOSFET VDS= 600V RDS(ON), [email protected], [email protected] = 3.8Ω We declare that the material of product compliance with RoHS requirements. 2N3904 Datasheet, 2N3904 PDF, 2N3904 Data sheet, 2N3904 manual, 2N3904 pdf, 2N3904, datenblatt, Electronics 2N3904, alldatasheet, free, datasheet, Datasheets, data ... Disclaimer This data sheet and its contents (the "Information") belong to the Premier Farnell Group (the "Group") or are licensed to it. N o licence is granted for the use of it other than for information purposes 2N3904 datasheet, 2N3904 pdf, 2N3904 data sheet, datasheet, data sheet, pdf 2N3904, 2N3904 Datasheet, 2N3904 NPN General Purpose Transistor Datasheet, buy 2N3904 Transistor
2N3904 Datasheet (PDF) 1.1. 2n3904g.pdf Size:398K _upd SEMICONDUCTOR 2N3904 TECHNICAL DATA FEATURE NPN silicon epitaxial planar transistor for switching and TO-92 Amplifier applications As complementary type, the PNP transistor 2N3906 is Recommended 1. EMITTER 2. BASE 3. Disclaimer This data sheet and its contents (the "Information") belong to the Premier Farnell Group (the "Group") or are licensed to it. N o licence is granted for the use of it other than for information purposes LITE-ON TECHNOLOGY CORPORATION Property of Lite-on Only ABSOLUTE MAXIMUM RATING ( Ta = 25°C ) PARAMETER SYMBOL RATING UNIT Forward Current IF 50 mA Reverse Voltage VR 6 V INPUT Power Dissipation PD 120 mW Off-State Output Terminal Voltage VDRM 600 V Peak Repetitive Surge Current ( PW=100µs, 120pps ) ITSM 1 A OUTPUT Is a 2n3906 an suitable substitute for a S8050? What about 2n3904 for a S3550? ... ohh one more thing Iooked at the KMZ52's datasheet and the pcb, I think the current ...