{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"IPS521S","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"IPS521S","canonicalUrl":"https://icboms.com/infineon/IPS521S","factsUrl":"https://icboms.com/api/mcp/products/IPS521S","rawCanonicalId":null},"summary":{"shortDescription":"IPS521S, Infineon (International Rectifier) high-side power switch, single N-channel output, 55 mOhm typ Rds(on), 1.9A max, 5.5V–35V load, TO-263-5 D2Pak, -40°C to 150°C.","salesMarkdown":"The typical on-resistance of 55 mOhm at 1.9 A output means a conduction loss of about 200 mW at full load. ## Integrated fault protections simplify the BOM Fixed current limiting, open-load detection, and over-temperature shutdown are built in. No external sense resistor or comparator is needed for basic fault handling. The auto-restart feature means the switch recovers after a fault clears without a power cycle. ## Package and footprint – D2Pak (TO-263-5) The TO-263-5 (D2Pak) package has four leads plus a large exposed tab. The tab is the main thermal path and the drain connection. A solid copper pour on the PCB under the tab is needed to keep junction temperatures down at high load currents.","metaTitle":"IPS521S High-Side Switch, 55 mOhm, Obsolete – Sourcing Info","metaDescription":"IPS521S high-side power switch, 1.9A output, 55 mOhm Rds(on), TO-263-5 package. Check replacement options.","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":"Tube","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/IPS521S/alternatives.json"},"ai":{"faq":[{"question":"Is IPS521S obsolete?","answer":"Yes, the IPS521S is listed as obsolete by the manufacturer. It is not recommended for new designs."},{"question":"What is the replacement for IPS521S?","answer":"No official successor is listed on the record. For a pin-compatible alternative within the same high-side switch family, check the IPS521 series base number (IPS521) – parts sharing that base number typically share the same footprint and pinout. Confirm the exact replacement with the manufacturer's cross-reference tool or your distributor."},{"question":"What protections does IPS521S have?","answer":"The IPS521S includes fixed current limiting, open-load detection, and over-temperature shutdown. It also features auto-restart, so the switch re-enables after a fault condition clears."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/IPS521S","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/IPS521S 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}}