{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"IPS521STRL","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"IPS521STRL","canonicalUrl":"https://icboms.com/infineon/IPS521STRL","factsUrl":"https://icboms.com/api/mcp/products/IPS521STRL","rawCanonicalId":null},"summary":{"shortDescription":"Infineon IPS521STRL high-side N-channel power switch, 55 mOhm typical Rds(on), 1.9 A max output, 5.5 V to 35 V load supply, D2Pak (SMD-220 5-Lead) surface-mount package, -40°C to 150°C junction temperature.","salesMarkdown":"## 55 mOhm high-side switch with auto-restart and fault protection The Infineon IPS521STRL is a single-channel high-side N-channel power switch in a D2Pak (5-Lead) surface-mount package. It switches a load supply from 5.5 V to 35 V and delivers up to 1.9 A continuous output current, with a typical on-resistance of 55 mOhm. The switch is self-contained — it requires no external Vcc supply to operate (the gate drive is bootstrapped from the load voltage). Built-in fault protection includes current limiting (fixed threshold), open-load detection, and over-temperature shutdown. The auto-restart feature means the switch re-tries after a fault clears, which is useful for driving lamps or motors that present a momentary short at turn-on. ## Load budget and thermal reality The 55 mOhm Rds(on) at 25°C junction sets the conduction loss floor: at 1.9 A the dissipation is about 200 mW. That figure doubles at 150°C junction because silicon Rds(on) roughly doubles with temperature. The D2Pak's exposed tab soldered to a large copper plane on the PCB is the primary heat path — without adequate copper area the junction temperature climbs above the 150°C absolute maximum and the over-temperature protection cycles the output. The 35 V maximum covers 24 V industrial rails and 12 V automotive systems with headroom for load-dump transients. ## Package and footprint notes for the D2Pak The D2Pak (5-Lead) is a surface-mount power package with an exposed metal tab on the bottom. The 5-lead variant has four signal pins plus the tab; the fifth pin is the sense/status output. The package footprint is compatible with standard TO-263-5 land patterns.","metaTitle":"IPS521STRL High-Side Switch, 55 mOhm, 1.9 A, D2Pak, Obsolete","metaDescription":"IPS521STRL is an obsolete high-side N-channel power switch with 55 mOhm Rds(on), 1.9 A output, and integrated fault protection.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"Infineon Technologies","Series":"-","Package":"Tape & Reel (TR)","Features":"Auto Restart","Interface":"On/Off","Input Type":"Non-Inverting","Output Type":"N-Channel","Switch Type":"General Purpose","Rds On (Typ)":"55mOhm","Mounting Type":"Surface Mount","Package / Case":"TO-263-5, D²Pak (4 Leads + Tab), TO-263BB","Product Status":"Obsolete","Voltage - Load":"5.5V ~ 35V","lifecycle_stage":"eol_hot","Fault Protection":"Current Limiting (Fixed), Open Load Detect, Over Temperature","Number of Outputs":"1","Base Product Number":"IPS521","Output Configuration":"High Side","Ratio - Input:Output":"1:1","Operating Temperature":"-40°C ~ 150°C (TJ)","Current - Output (Max)":"1.9A","Supplier Device Package":"D2Pak (SMD-220 5-Lead)","Voltage - Supply (Vcc/Vdd)":"Not Required"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.1600","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f300a5d4a23df97a64bf9dc5c306ad39.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/IPS521STRL/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for IPS521STRL?","answer":"No official successor or cross-reference is listed for the IPS521STRL. For a pin-compatible alternative, look at other high-side switches in the IPS521 family (base number IPS521) that share the same D2Pak footprint and pinout — but verify the specific variant's ratings and availability. The IPS521STRL is obsolete, so any replacement will need a BOM qualification cycle."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/IPS521STRL","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/IPS521STRL when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T18:03:28.771Z","lastPublished":"2026-07-22T18:03:28.771Z","indexable":true}}