{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE250CA","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"1.5KE250CA","canonicalUrl":"https://icboms.com/stmicroelectronics/1.5KE250CA","factsUrl":"https://icboms.com/api/mcp/products/1.5KE250CA","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics 1.5KE, TRANSIL™ series bidirectional TVS diode, 1.5KE250CA, 1500W peak pulse power, 213V reverse standoff, 237V breakdown min, 442V clamping, DO-201AA/DO-27 axial package.","salesMarkdown":"## Transient suppressor for 213 V rails The STMicroelectronics 1.5KE250CA is a bidirectional TRANSIL™ TVS diode from the 1.5KE series, designed to clamp voltage transients on DC power and signal lines with a 213 V reverse standoff rating. The single bidirectional channel handles both positive and negative overvoltage events, simplifying protection on AC-coupled or bipolar rails. This through-hole axial device in a DO-201AA / DO-27 package suits general-purpose industrial, telecom, and power-supply applications where board space allows leaded components. For a 213 V nominal rail, this clamp leaves roughly 2× headroom above the operating voltage, typical for MOV or TVS-protected industrial inputs. The 1500 W peak pulse capability (10/1000 µs) covers moderate-energy transients like inductive kickback or lightning-induced surges on outdoor cabling. No power line protection is claimed, so this part is intended for secondary-side or signal-line clamping, not AC mains entrance protection. ## Package and mounting for the DO-201 build The DO-201AA / DO-27 axial leaded package requires through-hole mounting with lead forming for PCB or terminal strip insertion. The 280 pF typical capacitance at 1 MHz is a consideration on high-speed data lines — at 213 V standoff, this capacitance is acceptable for 50/60 Hz power or low-frequency signal protection but may load a fast communication bus. No heatsink is required for single-pulse transient duty; the axial body dissipates the pulse energy thermally into the leads and board copper. For BOM planning, this removes last-time-buy risk on the line item.","metaTitle":"STMicroelectronics 1.5KE250CA TVS Diode, 1500W Bidirectional","metaDescription":"STMicroelectronics 1.5KE250CA bidirectional TVS diode, 1500W peak pulse power, 213V reverse standoff, DO-201 package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"STMicroelectronics","Type":"Zener","Series":"1.5KE, TRANSIL™","Package":"Cut Tape (CT); Tape & Box (TB)","Applications":"General Purpose","Mounting Type":"Through Hole","Package / Case":"DO-201AA, DO-27, Axial","Product Status":"Active","lifecycle_stage":"eol_hot","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1.5KE250","Operating Temperature":"-","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"280pF @ 1MHz","Supplier Device Package":"DO-201","Voltage - Breakdown (Min)":"237V","Voltage - Clamping (Max) @ Ipp":"442V","Voltage - Reverse Standoff (Typ)":"213V","Current - Peak Pulse (10/1000µs)":"23A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.0500","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/572f99690aeb2b0f302ed9cdcfd976ec.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1.5KE250CA/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between 1.5KE250CA and 1.5KE250A?","answer":"The 1.5KE250CA is the bidirectional version of the same base device; the 1.5KE250A is the unidirectional variant. Both share the same 213 V standoff, 237 V breakdown, and 1500 W peak pulse rating. The bidirectional CA type clamps both polarities with a single device, while the unidirectional A type protects one polarity and requires orientation."},{"question":"Does 1.5KE250CA require a heatsink?","answer":"No. As a transient voltage suppressor rated for single-pulse surge duty, the DO-201 axial package dissipates the 1500 W peak pulse through its leads and board copper without an external heatsink. Continuous power dissipation is not the intended operating mode."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/1.5KE250CA","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/1.5KE250CA 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}}