{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BC817K25E6327HTSA1","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"BC817K25E6327HTSA1","canonicalUrl":"https://icboms.com/infineon/BC817K25E6327HTSA1","factsUrl":"https://icboms.com/api/mcp/products/BC817K25E6327HTSA1","rawCanonicalId":null},"summary":{"shortDescription":"Infineon BC817K25E6327HTSA1 NPN general-purpose transistor, 45 V Vce, 500 mA Ic, 170 MHz fT, 160 min hFE at 100 mA, SOT-23-3 surface-mount package, 500 mW power dissipation.","salesMarkdown":"## What this NPN transistor does in a design The Infineon BC817K25E6327HTSA1 is a general-purpose NPN bipolar junction transistor in a small SOT-23-3 surface-mount package. It handles collector currents up to 500 mA and blocks up to 45 V, making it a workhorse for low-to-medium power switching and linear amplification in compact PCB layouts. With a minimum DC current gain (hFE) of 160 at 100 mA collector current and 1 V Vce, the base drive requirement stays modest — a few milliamps from a microcontroller GPIO or logic gate can saturate the transistor for driving relays, LEDs, small solenoids, or signal-level loads. The 170 MHz transition frequency (fT) places it firmly in the general-purpose switching category — fast enough for PWM dimming, relay coil suppression, and low-speed logic-level translation, but not intended for RF amplifier stages above VHF. ## 45 V Vce and 500 mA Ic — the operating envelope The 45 V collector-emitter breakdown voltage gives headroom for 12 V and 24 V industrial supply rails, with margin for inductive flyback spikes when driving relay coils or small motors. The 500 mA continuous collector current rating covers most signal-level loads; for higher current, step up to a medium-power transistor like the BC639 or a small-signal MOSFET. Maximum power dissipation is 500 mW in the SOT-23 package — derate this for ambient temperatures above 25 °C. At 150 °C junction temperature (TJ), the safe operating area shrinks; a quick thermal check: at 100 mA and 2 V Vce (200 mW), the junction stays well within limits in normal room-temperature use. Vce saturation is specified at 700 mV maximum with 50 mA base current and 500 mA collector current — meaning the transistor can saturate hard enough to keep dissipation low in switching applications. Procurement teams should treat this as a time-limited sourcing event: secure lifetime buy quantities or qualify a pin-compatible replacement before the last-time-buy deadline passes. The base product number is BC817, a widely used NPN transistor family with multiple gain-group and package variants. Verify the exact hFE bin and package marking with your Infineon distributor.","metaTitle":"Infineon BC817K25E6327HTSA1 NPN Transistor, 45V 500mA SOT-23","metaDescription":"Infineon BC817K25E6327HTSA1 NPN transistor, 45V Vce, 500mA Ic, 170MHz fT, SOT-23 package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Last Buy","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"Infineon Technologies","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Power - Max":"500 mW","Mounting Type":"Surface Mount","Package / Case":"TO-236-3, SC-59, SOT-23-3","Product Status":"Last Time Buy","Transistor Type":"NPN","lifecycle_stage":"eol_hot","Base Product Number":"BC817","Operating Temperature":"150°C(TJ)","Frequency - Transition":"170MHz","Supplier Device Package":"PG-SOT23","Vce Saturation (Max) @ Ib, Ic":"700mV @ 50mA, 500mA","Current - Collector (Ic) (Max)":"500 mA","Current - Collector Cutoff (Max)":"100nA (ICBO)","DC Current Gain (hFE) (Min) @ Ic, Vce":"160 @ 100mA, 1V","Voltage - Collector Emitter Breakdown (Max)":"45 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.3600","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/e1198b7a398bf9fcc31ab9c515acedbd.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/BC817K25E6327HTSA1/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/BC817K25E6327HTSA1","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/BC817K25E6327HTSA1 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T14:25:35.609Z","lastPublished":"2026-07-16T14:25:35.609Z","indexable":true}}