{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"UMG8NTR","brand":"ROHM Semiconductor","brandSlug":"rohm","productSlug":"UMG8NTR","canonicalUrl":"https://icboms.com/rohm/UMG8NTR","factsUrl":"https://icboms.com/api/mcp/products/UMG8NTR","rawCanonicalId":null},"summary":{"shortDescription":"ROHM UMG8NTR — dual NPN pre-biased (bias resistor type) transistor, 50 V VCEO, 100 mA Ic, 4.7 kΩ base / 47 kΩ base-emitter resistors, 250 MHz fT, 150 mW, surface-mount UMT5 (SOT-353) package, ROHS3 compliant.","salesMarkdown":"The ROHM UMG8NTR is a dual NPN transistor array with integrated bias resistors — each transistor has a 4.7 kΩ series base resistor (R1) and a 47 kΩ resistor (R2) between base and emitter. This pre-biased configuration eliminates two external resistors per channel, shrinking the BOM and board area for low-current switching applications up to 100 mA collector current and 50 V collector-emitter breakdown. The 250 MHz transition frequency means it handles moderate-speed switching — think relay drivers, LED indicators, logic-level translators, or sensor readout muxes — not RF or high-frequency power conversion. It comes in a 5-pin UMT5 package (SOT-353 footprint), surface-mount only. The 150 mW power ceiling keeps it in the low-signal domain; don't plan on driving a solenoid or motor winding directly. ## Bias resistor ratio — the input threshold decision With R1 at 4.7 kΩ and R2 at 47 kΩ, the base sees about 90% of the applied input voltage after the divider. A 3.3 V logic signal turns the transistor on hard — the VCE(sat) is only 300 mV at 5 mA with 250 µA base drive. If your logic level is 1.8 V, check the base current: at 1.8 V input, base current is roughly (1.8 V – 0.7 Vbe) / 4.7 kΩ ≈ 234 µA, still enough to saturate at 5 mA. Below 1.5 V input the margin gets thin.","metaTitle":"UMG8NTR dual NPN pre-biased transistor, 50 V, 100 mA","metaDescription":"UMG8NTR dual NPN pre-biased transistor in UMT5 package. 50 V VCEO, 100 mA Ic, 4.7k/47k bias resistors. Active lifecycle, 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":"150mW","Mounting Type":"Surface Mount","Package / Case":"5-TSSOP, SC-70-5, SOT-353","Transistor Type":"2 NPN - Pre-Biased (Dual)","lifecycle_stage":"eol_hot","Resistor - Base (R1)":"4.7kOhms","Frequency - Transition":"250MHz","Supplier Device Package":"UMT5","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":"$0.45","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.45000","currency":"USD"},{"qty":10,"price":"$0.33600","currency":"USD"},{"qty":100,"price":"$0.20950","currency":"USD"},{"qty":500,"price":"$0.14332","currency":"USD"},{"qty":1000,"price":"$0.11024","currency":"USD"},{"qty":3000,"price":"$0.09922","currency":"USD"},{"qty":6000,"price":"$0.09370","currency":"USD"},{"qty":15000,"price":"$0.08544","currency":"USD"},{"qty":30000,"price":"$0.07992","currency":"USD"},{"qty":75000,"price":"$0.07800","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/57353676878a48d4496ae8510020668c.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the equivalent for UMG8NTR?","answer":"The closest functional peer is the UMG11NTR, which has the same 50 V / 100 mA / 250 MHz ratings and the same UMT5 package, but uses a 2.2 kΩ base resistor instead of 4.7 kΩ. That changes the input threshold — the UMG11NTR turns on at a lower input voltage but draws more base current from the driver. For a direct drop-in with the same 4.7 kΩ / 47 kΩ ratio, there is no exact second source listed; the UMG8NTR is the part for that ratio."},{"question":"Can I replace UMG8NTR with a general-purpose dual NPN?","answer":"Not without adding external resistors. The UMG8NTR integrates the bias network — a general-purpose dual NPN (like a BCM847DS) needs two 4.7 kΩ base resistors and two 47 kΩ base-emitter resistors added externally. That adds four components and takes more board area. If you already have the resistor values on the BOM, a general-purpose part works; otherwise the pre-biased part saves space and placement cost."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/rohm/UMG8NTR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/rohm/UMG8NTR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}