{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STTH3012D","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STTH3012D","canonicalUrl":"https://icboms.com/stmicroelectronics/STTH3012D","factsUrl":"https://icboms.com/api/mcp/products/STTH3012D","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STTH3012D, Fast Recovery Diode, Standard type, 1200 V DC reverse, 30 A average rectified, 115 ns reverse recovery time, 2.25 V forward drop at 30 A, TO-220-2 through-hole, ROHS3 compliant.","salesMarkdown":"The STTH3012D is a 1200 V, 30 A fast recovery rectifier from STMicroelectronics in a TO-220-2 through-hole package. It is built for hard-switched power conversion where reverse recovery charge and switching losses drive the thermal design — PFC boost stages, high-voltage DC-DC converters, and inverter freewheel diodes in the 1–3 kW range. The 115 ns reverse recovery time (trr) is the key switching parameter: at 30 A and 1200 V bus, a slower diode would dump more recovery charge into the IGBT or MOSFET, raising junction temperature and risking shoot-through. This part keeps the recovery event short enough for 20–50 kHz hard-switched topologies without requiring a snubber on every transition. ## Forward drop and conduction loss — heatsink sizing reality At 30 A forward current the maximum forward voltage is 2.25 V, which means 67.5 W of conduction loss at full rated current. That is a lot of heat for a TO-220 tab — the junction-to-case thermal path must be kept short with a proper heatsink and thermal compound. ## Reverse leakage at 1200 V — the blocking margin Reverse leakage current is 20 µA at the full 1200 V reverse voltage. That is low enough that leakage-induced self-heating is negligible in most designs, but it rises exponentially with junction temperature — at 125°C junction the leakage can be several milliamps, which matters if the diode sits in a high-impedance circuit or a stacked-voltage string. ## Package and assembly — TO-220-2 through-hole The TO-220-2 package (supplier device package TO-220AC) is a two-lead through-hole power package with a metal tab. The tab is electrically connected to the cathode — it must be isolated from the heatsink or the heatsink must be grounded accordingly. Through-hole assembly is straightforward for wave solder or hand-solder rework, and the tab accepts a standard TO-220 clip or screw-mount heatsink. The part is ROHS3 compliant. No official successor or second-source cross-reference is listed, so the BOM should be qualified with this single source unless a pin-compatible alternative is validated independently.","metaTitle":"ST STTH3012D 1200V 30A Fast Recovery Diode, TO-220-2","metaDescription":"STMicroelectronics STTH3012D, a 1200V 30A fast recovery diode in TO-220-2 package. 115 ns trr, 2.25 Vf at 30 A. Active production, ROHS3 compliant.","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","Diode Type":"Standard","Mounting Type":"Through Hole","Package / Case":"TO-220-2","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"STTH3012","Capacitance @ Vr, F":"-","Supplier Device Package":"TO-220AC","Reverse Recovery Time (trr)":"115 ns","Current - Reverse Leakage @ Vr":"20 µA @ 1200 V","Voltage - DC Reverse (Vr) (Max)":"1200 V","Current - Average Rectified (Io)":"30A","Operating Temperature - Junction":"175°C(Max)","Voltage - Forward (Vf) (Max) @ If":"2.25 V @ 30 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.6500","priceTiers":[{"qty":1,"price":"$3.65000","currency":"USD"},{"qty":50,"price":"$2.88960","currency":"USD"},{"qty":100,"price":"$2.47680","currency":"USD"},{"qty":500,"price":"$2.20164","currency":"USD"},{"qty":1000,"price":"$1.88515","currency":"USD"},{"qty":2000,"price":"$1.77507","currency":"USD"},{"qty":5000,"price":"$1.70300","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/a3d2d51f14c0e87a873b1a85ad15c5dd.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STTH3012D/alternatives.json"},"ai":{"faq":[{"question":"What is the reverse recovery time of STTH3012D?","answer":"The reverse recovery time (trr) is 115 ns, measured under standard test conditions. This is a fast recovery diode, with recovery time under 500 ns at rated current."},{"question":"Is STTH3012D RoHS compliant?","answer":"Yes, the STTH3012D is ROHS3 compliant per the manufacturer's status."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STTH3012D","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STTH3012D 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}}