{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STTH30R03CW","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STTH30R03CW","canonicalUrl":"https://icboms.com/stmicroelectronics/STTH30R03CW","factsUrl":"https://icboms.com/api/mcp/products/STTH30R03CW","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STTH30R03CW, dual common-cathode fast recovery diode, 300V Vr, 15A Io per diode, 35ns trr, 1.9V Vf at 15A, TO-247-3 package, 175°C Tj max.","salesMarkdown":"## Dual fast-recovery diode for PFC and output rectification Its 35 ns reverse recovery time places it in the fast-recovery class, making it suited for continuous-conduction-mode PFC boost stages, output rectification in SMPS, and freewheeling diodes in motor-drive inverters where switching losses dominate the thermal budget. A 35 ns reverse recovery time at 15 A forward current means the diode clears stored charge quickly during turn-off, keeping the switching energy per cycle low. In a 100 kHz PFC stage, the recovery loss scales linearly with trr; a 35 ns part runs cooler than a 100 ns general-purpose rectifier at the same frequency, allowing a smaller heatsink or higher output power. The 1.9 V forward drop at 15 A and 25°C junction sets the conduction loss floor at roughly 28.5 W per diode at full rated current. Actual junction temperature will be higher than ambient, so the Vf increase with temperature must be factored into the heatsink design — the 175°C maximum junction rating provides headroom for that rise. ## 300 V reverse voltage and 175°C junction — thermal and voltage margin The 300 V DC reverse rating covers the rectified bus from a 230 VAC line (nominal 325 V peak) with about 25 V of margin at nominal conditions. For 277 VAC or high-line transients, the margin narrows; a 400 V or 600 V rated diode would be the safer choice in those applications. A 175°C maximum junction temperature is 25°C higher than the common 150°C limit on standard fast-recovery diodes. That extra headroom lets the STTH30R03CW sustain higher average current or operate in a hotter enclosure without derating, which is useful in sealed power supplies or motor drives where airflow is limited.","metaTitle":"STTH30R03CW Diode Array, 300V 15A Fast Recovery, TO-247-3","metaDescription":"STTH30R03CW dual common-cathode fast recovery diode, 300V reverse, 15A per diode, 35ns trr, 175°C Tj max. Active production, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Speed":"Fast Recovery =< 500ns, > 200mA (Io)","Series":"-","Package":"Tube","Technology":"Standard","Mounting Type":"Through Hole","Package / Case":"TO-247-3","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"STTH30","Diode Configuration":"1 Pair Common Cathode","Supplier Device Package":"TO-247-3","Reverse Recovery Time (trr)":"35 ns","Current - Reverse Leakage @ Vr":"20 µA @ 300 V","Voltage - DC Reverse (Vr) (Max)":"300 V","Operating Temperature - Junction":"175°C (Max)","Voltage - Forward (Vf) (Max) @ If":"1.9 V @ 15 A","Current - Average Rectified (Io) (per Diode)":"15A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.1200","priceTiers":[{"qty":1,"price":"$3.12000","currency":"USD"},{"qty":10,"price":"$2.62300","currency":"USD"},{"qty":100,"price":"$2.12230","currency":"USD"},{"qty":500,"price":"$1.88652","currency":"USD"},{"qty":1000,"price":"$1.61533","currency":"USD"},{"qty":2000,"price":"$1.52101","currency":"USD"},{"qty":5000,"price":"$1.45925","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/2a18db4148269116f31a1ac6d3e64276.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STTH30R03CW/alternatives.json"},"ai":{"faq":[{"question":"What is the reverse recovery time of STTH30R03CW?","answer":"The reverse recovery time (trr) is 35 ns, measured at the rated forward current. This fast recovery characteristic keeps switching losses low in high-frequency PFC and SMPS output stages."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STTH30R03CW","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STTH30R03CW when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}