{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BSO203PH","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"BSO203PH","canonicalUrl":"https://icboms.com/infineon/BSO203PH","factsUrl":"https://icboms.com/api/mcp/products/BSO203PH","rawCanonicalId":null},"summary":{"shortDescription":"Infineon OptiMOS® BSO203PH, dual P-Channel MOSFET, 20 V Vdss, 7 A continuous drain, 21 mOhm Rds(on) max at 4.5 V gate drive, logic-level gate, 1.6 W power dissipation, surface-mount PG-DSO-8 package.","salesMarkdown":"The Infineon BSO203PH is a dual P-channel enhancement-mode MOSFET from the OptiMOS® family, built for low-voltage power switching where two matched P-FETs are needed in a single SOIC-8 footprint. The 1.6 W package-level power limit means the thermal budget is tight for continuous high-current operation; this part is sized for load-switching, battery-protection, or power-rail OR-ing where the average dissipation stays low and the SOIC-8 copper footprint can sink the heat. ## 21 mOhm at 4.5 V — what the on-resistance means for your BOM The 21 mOhm Rds(on) is specified at 4.5 V gate drive, not the usual 10 V. At 7 A the conduction loss is roughly 1 W per channel (I² × R), which eats into the 1.6 W package limit — derate for ambient temperature above 25 °C. If your load is intermittent or you parallel the two channels, the effective resistance drops to about 10.5 mOhm, splitting the dissipation across both dice. ## Package and thermal handling for the layout The part ships in an 8-pin SOIC package (PG-DSO-8, 3.90 mm body width). The two P-channel dice share the same substrate; the exposed pad on the bottom of the package is the common drain connection. For the 1.6 W max dissipation to be usable, the PCB copper area under the package must be stitched with vias to an inner-layer ground plane — without that thermal path the junction temperature rises quickly above 150 °C at continuous current. The gate charge is 39 nC at 4.5 V, so the switching losses at moderate frequency (100–200 kHz) are manageable from a standard MCU GPIO.","metaTitle":"Infineon BSO203PH OptiMOS Dual P-Channel MOSFET, 20 V, 7 A","metaDescription":"Infineon BSO203PH OptiMOS dual P-channel MOSFET, 20 V drain-source, 7 A continuous, 21 mOhm Rds(on) at 4.5 V.","metaKeywords":null},"attributes":{"series":"OptiMOS®","packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Logic ICs"],"specifications":{"Series":"OptiMOS®","Package":"Bulk","FET Type":"2 P-Channel (Dual)","FET Feature":"Logic Level Gate","Power - Max":"1.6W (Ta)","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Vgs(th) (Max) @ Id":"1.2V @ 50µA","Operating Temperature":"-55°C ~ 150°C (TJ)","Rds On (Max) @ Id, Vgs":"21mOhm @ 8.2A, 4.5V","Supplier Device Package":"PG-DSO-8","Gate Charge (Qg) (Max) @ Vgs":"39nC @ 4.5V","Drain to Source Voltage (Vdss)":"20V","Input Capacitance (Ciss) (Max) @ Vds":"3750pF @ 15V","Current - Continuous Drain (Id) @ 25°C":"7A (Ta)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.61","stockQuantity":0,"priceTiers":[{"qty":490,"price":"$0.61000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/29bfc8afe512155b49343895f2f7b844.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to BSO203PH?","answer":"Within the same OptiMOS family, Infineon offers several dual P-channel parts in the PG-DSO-8 footprint, but the exact Rds(on) and current rating vary by variant."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/BSO203PH","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/BSO203PH 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}}