{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"RN4904,LF","brand":"Toshiba Semiconductor","brandSlug":"toshiba","productSlug":"RN4904~6LF","canonicalUrl":"https://icboms.com/toshiba/RN4904~6LF","factsUrl":"https://icboms.com/api/mcp/products/RN4904%2CLF","rawCanonicalId":null},"summary":{"shortDescription":"Toshiba RN4904,LF dual NPN/PNP pre-biased transistor, 50 V Vceo, 100 mA Ic, 200 mW, 47 kΩ + 47 kΩ bias resistors, 200 MHz ft, US6 package.","salesMarkdown":"## Dual pre-biased transistor in a 6-pin US6 The Toshiba RN4904,LF packs one NPN and one PNP pre-biased transistor into a single 6-pin US6 package (SC-88 / SOT-363 footprint). Each transistor has its own 47 kΩ base resistor and 47 kΩ base-emitter resistor, so you drop the external bias network — the part switches on with a logic-level signal directly. The 200 mW power limit and 50 V collector-emitter breakdown cover low-side and high-side drive in 5 V or 12 V rails. 100 mA continuous collector current handles relay coils, indicator LEDs, and small signal loads without a heatsink. ## Bias resistor set — 47 kΩ / 47 kΩ The RN4904 uses matched 47 kΩ resistors on both the base and base-emitter legs. That is a higher impedance than the 10 kΩ / 10 kΩ pair on the RN1702 or the 22 kΩ / 47 kΩ mix on the RN1908. The higher base resistance means lower drive current from the MCU pin, but it also raises the input threshold — the transistor turns on when the base voltage exceeds about 0.7 V plus the drop across the 47 kΩ base resistor. For a 3.3 V logic output the RN4904 switches cleanly; for 1.8 V logic the lower-resistance parts may be a better fit. The LF suffix confirms lead-free / RoHS-compliant plating, which matches current assembly requirements.","metaTitle":"RN4904,LF NPN/PNP Pre-Biased Dual Transistor, 200 mW, US6","metaDescription":"RN4904,LF dual NPN/PNP pre-biased transistor in US6 package. 50 V Vceo, 100 mA Ic, 200 mW. Active, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Memory (DRAM / SRAM / Flash / EEPROM)"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Power - Max":"200mW","Mounting Type":"Surface Mount","Package / Case":"6-TSSOP, SC-88, SOT-363","Transistor Type":"1 NPN, 1 PNP - Pre-Biased (Dual)","lifecycle_stage":"eol_hot","Resistor - Base (R1)":"47kOhms","Frequency - Transition":"200MHz","Supplier Device Package":"US6","Resistor - Emitter Base (R2)":"47kOhms","Vce Saturation (Max) @ Ib, Ic":"300mV @ 250µA, 5mA","Current - Collector (Ic) (Max)":"100mA","Current - Collector Cutoff (Max)":"500nA","DC Current Gain (hFE) (Min) @ Ic, Vce":"80 @ 10mA, 5V","Voltage - Collector Emitter Breakdown (Max)":"50V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.28","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.28000","currency":"USD"},{"qty":10,"price":"$0.19100","currency":"USD"},{"qty":100,"price":"$0.09330","currency":"USD"},{"qty":500,"price":"$0.07784","currency":"USD"},{"qty":1000,"price":"$0.05409","currency":"USD"},{"qty":3000,"price":"$0.04687","currency":"USD"},{"qty":6000,"price":"$0.04348","currency":"USD"},{"qty":9000,"price":"$0.03606","currency":"USD"},{"qty":30000,"price":"$0.03542","currency":"USD"},{"qty":75000,"price":"$0.03181","currency":"USD"},{"qty":150000,"price":"$0.02757","currency":"USD"}]},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"What is the RN4904 transistor?","answer":"The RN4904 is a dual NPN/PNP pre-biased transistor from Toshiba. It integrates one NPN and one PNP transistor with built-in 47 kΩ bias resistors in a single US6 surface-mount package, rated for 50 V Vceo, 100 mA Ic, and 200 mW power dissipation."},{"question":"What is the equivalent of RN4904?","answer":"The closest functional second-source is the RN2904FE,LF, which is a dual PNP-only pre-biased transistor with the same 47 kΩ / 47 kΩ bias resistors and 200 MHz transition frequency. For a dual NPN/PNP complement the RN1908 (2 NPN, 22 kΩ / 47 kΩ) or RN1702 (2 NPN, 10 kΩ / 10 kΩ) are different bias configurations — check the resistor values against your drive circuit."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/toshiba/RN4904~6LF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/toshiba/RN4904~6LF when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}