{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"RB238NS-30TL","brand":"ROHM Semiconductor","brandSlug":"rohm","productSlug":"RB238NS-30TL","canonicalUrl":"https://icboms.com/rohm/RB238NS-30TL","factsUrl":"https://icboms.com/api/mcp/products/RB238NS-30TL","rawCanonicalId":null},"summary":{"shortDescription":"ROHM Semiconductor RB238NS-30TL Schottky diode, 1 pair common cathode, 30 V reverse, 40 A average per diode, TO-263S LPDS package, Tape & Reel.","salesMarkdown":"## Active production — what it means for the BOM line The RB238NS-30TL: For a BOM that already qualifies this part, the supply risk is the standard semiconductor availability window, not an obsolescence-driven scramble. ## 40 A per diode — conduction loss and the forward-drop trade Each Schottky in the common-cathode pair is rated for 40 A average rectified current. At that 40 A level the forward drop is not specified directly, but at 20 A the Vf max is 750 mV — so at full rated current the drop will be higher, and the conduction loss scales accordingly. The 30 V reverse voltage is the working ceiling. Reverse leakage is spec'd at 12 µA typical at that 30 V — ROHM markets this as 'super low IR', which matters in OR-ing and battery-backup circuits where leakage current drains the reserve when the diode is reverse-biased. ## Common-cathode pair — OR-ing and redundant supply topology Two Schottkys sharing a cathode in one TO-263S package is the textbook topology for diode-OR power supplies: each anode connects to a separate input rail (e.g., main PSU and battery backup), and the common cathode feeds the load. The shared cathode tab simplifies the PCB layout — one large copper pour handles the combined output current, and the two anodes route to their respective supplies. The fast recovery classification (≤ 500 ns) is inherent to the Schottky barrier — there is no stored charge to sweep out, so switching losses are negligible compared to a PN-junction recovery diode. The speed limit here is the package inductance and the board layout, not the die itself. ## Package and board-fit — TO-263S LPDS The TO-263-3 (D²Pak) footprint is standard for high-current surface-mount diodes.","metaTitle":"ROHM RB238NS-30TL Schottky, 40A, 30V, TO-263","metaDescription":"Active-production ROHM RB238NS-30TL Schottky diode, 40A per diode, 30V Vr, 12µA leakage, TO-263S LPDS. ROHS3. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Speed":"Fast Recovery =< 500ns, > 200mA (Io)","Package":"Tape & Reel (TR); Cut Tape (CT)","Diode Type":"Schottky","Mounting Type":"Surface Mount","Package / Case":"TO-263-3, D²Pak (2 Leads + Tab), TO-263AB","lifecycle_stage":"eol_hot","Diode Configuration":"1 Pair Common Cathode","Supplier Device Package":"LPDS","Current - Reverse Leakage @ Vr":"12 µA @ 30 V","Voltage - DC Reverse (Vr) (Max)":"30 V","Operating Temperature - Junction":"150°C","Voltage - Forward (Vf) (Max) @ If":"750 mV @ 20 A","Current - Average Rectified (Io) (per Diode)":"40A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.24","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$2.24000","currency":"USD"},{"qty":10,"price":"$2.01000","currency":"USD"},{"qty":100,"price":"$1.61590","currency":"USD"},{"qty":500,"price":"$1.32760","currency":"USD"},{"qty":1000,"price":"$1.10001","currency":"USD"},{"qty":2000,"price":"$1.06350","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/8bc08e32337186ec78453f7672cb6425.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to the RB238NS-30TL?","answer":"The common-cathode Schottky in TO-263 is a standard topology, so parametric equivalents exist from other vendors, but pinout and thermal pad dimensions must be verified against the specific LPDS package variant before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/rohm/RB238NS-30TL","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/rohm/RB238NS-30TL 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}}