{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5.0SMDJ20A-Q","brand":"Bourns Inc.","brandSlug":"bourns-inc","productSlug":"5.0SMDJ20A-Q","canonicalUrl":"https://icboms.com/bourns-inc/5.0SMDJ20A-Q","factsUrl":"https://icboms.com/api/mcp/products/5.0SMDJ20A-Q","rawCanonicalId":null},"summary":{"shortDescription":"Bourns Inc. Zener TVS diode, Automotive AEC-Q101, 5.0SMDJ20A-Q, 20V standoff, 5kW peak pulse (10/1000us), 155A peak pulse current, DO-214AB SMC surface mount, -55C to 150C junction.","salesMarkdown":"## What the voltage ratings mean on a 12V automotive rail The 5.0SMDJ20A-Q: A 12 V automotive rail sees 13.5-14 V during charging; the 20 V standoff gives the 40% headroom the system-level designer requires for load-dump events without triggering the clamp prematurely. The minimum breakdown of 22.2 V is where conduction begins — until a transient pushes the line above this, the diode draws only leakage current and the protected bus sees nothing. The gap between the 20 V standoff and the 32.4 V clamp is the protection window — the tighter this window, the better the downstream IC is spared. ## Why the AEC-Q101 grade and temperature range matter The AEC-Q101 qualification is not a marketing label — it is a defined stress-test sequence (temperature cycling, humidity, surge, mechanical shock) that gates this part for automotive under-hood and chassis-domain deployment. A non-automotive TVS in the same SMC package may share the electrical rating but fails an automotive safety review on qualification grounds alone. The single unidirectional channel means polarity matters — the cathode connects to the rail being protected, the anode to ground. The surface-mount DO-214AB (SMC) package follows the standard 3-lead footprint; the cathode band marking identifies orientation on the reel.","metaTitle":"Bourns 5.0SMDJ20A-Q TVS Diode, 20V standoff, 5kW peak","metaDescription":"Bourns 5.0SMDJ20A-Q is an AEC-Q101 Zener TVS diode, 20V standoff, 5kW peak pulse at 10/1000us, DO-214AB SMC surface mount. Active — quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Bourns Inc.","Type":"Zener","Series":"Automotive, AEC-Q101, 5.0SMDJ-Q","Package":"Tape & Reel (TR); Cut Tape (CT)","Applications":"Automotive","Mounting Type":"Surface Mount","Package / Case":"DO-214AB, SMC","Product Status":"Active","lifecycle_stage":"unknown","Power - Peak Pulse":"5000W (5kW)","Base Product Number":"5.0SMDJ","Operating Temperature":"-55°C~150°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"DO-214AB (SMC)","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"22.2V","Voltage - Clamping (Max) @ Ipp":"32.4V","Voltage - Reverse Standoff (Typ)":"20V","Current - Peak Pulse (10/1000µs)":"155A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.9375","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/01b4635941d863dc2cfd632b255cfd4b.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/5.0SMDJ20A-Q/alternatives.json"},"ai":{"faq":[{"question":"Who supplies 5.0SMDJ20A-Q and how is it quoted for volume purchases?","answer":"Sourced through independent distribution channels, quoted to order against BOM quantity."},{"question":"Is there a pin-compatible alternative within the Bourns 5.0SMDJ family?","answer":"The 5.0SMDJ base product spans multiple voltage stand-off grades in the same DO-214AB SMC package, so other grades in the series share the footprint. The selection must be driven by the specific standoff voltage required for the target rail — a lower-voltage variant cannot protect a 20 V rail without premature clamping, and a higher-voltage variant may not trip within the protection window the system demands."},{"question":"What type is the 5.0SMDJ20A-Q?","answer":"It is a unidirectional Zener TVS diode — the Zener mechanism provides the avalanche breakdown that clamps the transient, and the unidirectional polarity means it protects a positive-going rail against transients referenced to ground."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/bourns-inc/5.0SMDJ20A-Q","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/bourns-inc/5.0SMDJ20A-Q 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}}