{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BSP78HUMA1","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"BSP78HUMA1","canonicalUrl":"https://icboms.com/infineon/BSP78HUMA1","factsUrl":"https://icboms.com/api/mcp/products/BSP78HUMA1","rawCanonicalId":null},"summary":{"shortDescription":"Infineon HITFET® BSP78HUMA1, low-side N-channel power switch, 1:1 input:output, 35mOhm typ Rds(on), 3A max output, 42V max load, PG-SOT223-4 package, -40°C to 150°C junction temp.","salesMarkdown":"## Low-side switch for rugged loads The Infineon BSP78HUMA1 is a single-channel low-side N-channel power switch from the HITFET® series, designed for general-purpose on/off switching of resistive, inductive, and lamp loads. It delivers up to 3 A continuous output current with a typical Rds(on) of 35 mOhm, keeping conduction losses low for a 42 V max load supply. The switch operates over a -40°C to 150°C junction temperature range, suiting it for under-hood automotive, industrial actuator, and solenoid-drive environments where ambient heat is high. Integrated fault protection — fixed current limiting, over-temperature shutdown, and over-voltage clamping — lets the part survive short circuits and load dumps without external clamp diodes. ## Fault protection — self-contained, no external clamp Fixed current limiting prevents the output from exceeding safe levels during a short circuit; the part will auto-restart after the fault clears (the Auto Restart feature is listed). Over-temperature protection shuts the switch off if the die exceeds the thermal threshold, and over-voltage clamping absorbs inductive flyback energy from relays or solenoids. For a typical automotive load like a fuel pump or cooling fan, this eliminates the need for a freewheeling diode across the load, saving board space and BOM cost. ## Package and mounting The BSP78HUMA1 is supplied in a PG-SOT223-4 package (TO-261-4 equivalent), a surface-mount footprint with a large tab for heat transfer to the PCB. ## Lifecycle and sourcing The BSP78HUMA1 is an active, current-production part per Infineon's lifecycle status. The part is ROHS3 compliant. For BOM planning, this means no near-term LTB risk; the part can be specified into new designs with confidence.","metaTitle":"Infineon BSP78HUMA1 HITFET Low-Side Switch, 35mOhm, 3A","metaDescription":"Infineon BSP78HUMA1 HITFET low-side power switch: 35mOhm Rds(on), 3A max output, 42V load, SOT223-4. Active, ROHS3.","metaKeywords":null},"attributes":{"series":"HITFET®","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Series":"HITFET®","Package":"Tape & Reel (TR); Cut Tape (CT)","Features":"Auto Restart","Interface":"On/Off","Input Type":"Non-Inverting","Output Type":"N-Channel","Switch Type":"General Purpose","Rds On (Typ)":"35mOhm","Mounting Type":"Surface Mount","Package / Case":"TO-261-4, TO-261AA","Voltage - Load":"42V (Max)","lifecycle_stage":"eol_hot","Fault Protection":"Current Limiting (Fixed), Over Temperature, Over Voltage","Number of Outputs":"1","Output Configuration":"Low Side","Ratio - Input:Output":"1:1","Operating Temperature":"-40°C ~ 150°C (TJ)","Current - Output (Max)":"3A","Supplier Device Package":"PG-SOT223-4","Voltage - Supply (Vcc/Vdd)":"Not Required"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.96","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.96000","currency":"USD"},{"qty":10,"price":"$1.75900","currency":"USD"},{"qty":25,"price":"$1.65960","currency":"USD"},{"qty":100,"price":"$1.41380","currency":"USD"},{"qty":250,"price":"$1.32756","currency":"USD"},{"qty":500,"price":"$1.16160","currency":"USD"},{"qty":1000,"price":"$0.96247","currency":"USD"},{"qty":4000,"price":"$0.89609","currency":"USD"},{"qty":8000,"price":"$0.86290","currency":"USD"},{"qty":12000,"price":"$0.82972","currency":"USD"}]},"links":{"datasheetUrl":"https://www.infineon.com/dgdl/Infineon-BSP78-DS-v01_03-EN.pdf?fileId=5546d4625a888733015aaddd91c74c39","sourceUrl":null},"ai":{"faq":[{"question":"What is the equivalent part for BSP78HUMA1?","answer":"Within the same HITFET series, the BTS142DATMA1 is a functional peer with a lower 23 mOhm Rds(on) and higher 4.6 A output current, in the same SOT223-4 package. It is a drop-in alternative if your load requires more current headroom."},{"question":"What is the BSP78HUMA1 used for?","answer":"It is a general-purpose low-side power switch for resistive, inductive, and lamp loads — typical applications include automotive relays, solenoids, motors, and industrial actuators. The integrated fault protection makes it suitable for rugged environments where short circuits or over-temperature events are possible."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/BSP78HUMA1","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/BSP78HUMA1 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}}