{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"VIPER12AS-E","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"VIPER12AS-E","canonicalUrl":"https://icboms.com/stmicroelectronics/VIPER12AS-E","factsUrl":"https://icboms.com/api/mcp/products/VIPER12AS-E","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics VIPER™ series, VIPER12AS-E, offline switching regulator, 8 W output power, 730 V breakdown voltage, 60 kHz switching frequency, 8-SOIC package, surface mount.","salesMarkdown":"## Offline switcher with 730 V avalanche-rugged MOSFET The VIPER12AS-E is an offline switching regulator from STMicroelectronics' VIPER™ series, integrating a 730 V breakdown power MOSFET and a PWM controller in a single 8-SOIC package. It delivers up to 8 W in non-isolated flyback or buck topologies, making it a compact solution for auxiliary supplies in appliances, industrial controls, and smart meters. The 730 V avalanche-rated MOSFET provides enough headroom for universal mains input (85–265 VAC) plus line surges, reducing the need for external clamping circuits. This is a key reliability factor in high-line environments or regions with unstable grid voltage. ## 60 kHz fixed-frequency PWM with built-in protection Switching at 60 kHz, the VIPER12AS-E uses a fixed-frequency PWM architecture that simplifies transformer design and EMI filter sizing. The internal oscillator is trimmed to ±5 % typical, so the switching noise spectrum is predictable across production lots. On-chip fault protection covers current limiting, over-temperature shutdown, and over-voltage lockout. These features eliminate the need for a separate supervisor IC and allow the part to survive output short circuits or fan failures without damage. The start-up voltage is 14.5 V, with an operating supply range of 9 V to 38 V on the Vcc pin. This wide Vcc window accommodates self-supplied bias windings or auxiliary rails from a downstream regulator. ## Industrial temperature grade and SOIC-8 footprint Rated for junction temperatures from -40°C to 150°C, the VIPER12AS-E suits environments where ambient heat exceeds 85°C — such as motor-drive auxiliary supplies, outdoor LED lighting, and industrial PSUs. The 150°C absolute maximum junction temperature allows operation under full load even when the thermal resistance of the 8-SOIC package is high. The 8-SOIC (0.154-inch body width) footprint is a standard surface-mount package that reflows on a standard lead-free profile. The copper pad area under the IC on the PCB should be maximised to dissipate heat from the internal MOSFET; a 1 oz copper pour of at least 300 mm² is typical for 8 W designs. ## Active production with ROHS3 compliance STMicroelectronics lists the VIPER12AS-E as Active. This supports long-term production commitments without last-time-buy risk. The base product number is VIPER12, indicating this is the standard 8 W variant in the VIPER family. The 'S' suffix denotes the SOIC-8 package; the '-E' suffix is the ROHS3-compliant version.","metaTitle":"VIPER12AS-E STMicroelectronics Offline Switcher 8W 730V","metaDescription":"VIPER12AS-E from STMicroelectronics VIPER series: 8W offline switcher, 730V breakdown, 60kHz, non-isolated, SOIC-8. Active lifecycle, ROHS3.","metaKeywords":null},"attributes":{"series":"VIPER™","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"STMicroelectronics","Series":"VIPER™","Package":"Tube","Topology":"-","Duty Cycle":"-","Mounting Type":"Surface Mount","Power (Watts)":"8 W","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","Product Status":"Active","lifecycle_stage":"eol_hot","Control Features":"-","Fault Protection":"Current Limiting, Over Temperature, Over Voltage","Output Isolation":"Non-Isolated","Internal Switch(s)":"Yes","Voltage - Start Up":"14.5 V","Base Product Number":"VIPER12","Voltage - Breakdown":"730V","Frequency - Switching":"60kHz","Operating Temperature":"-40°C ~ 150°C (TC)","Supplier Device Package":"8-SOIC","Voltage - Supply (Vcc/Vdd)":"9V ~ 38V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.3600","priceTiers":[{"qty":1,"price":"$1.36000","currency":"USD"},{"qty":10,"price":"$1.21900","currency":"USD"},{"qty":25,"price":"$1.15680","currency":"USD"},{"qty":100,"price":"$0.95030","currency":"USD"},{"qty":250,"price":"$0.88836","currency":"USD"},{"qty":500,"price":"$0.78506","currency":"USD"},{"qty":1000,"price":"$0.61979","currency":"USD"},{"qty":2500,"price":"$0.57847","currency":"USD"},{"qty":5000,"price":"$0.54954","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/432c6d1734bb4d8458c46b24c8cd47d4.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/VIPER12AS-E/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy VIPER12AS-E and what is the current pricing?","answer":"VIPER12AS-E is an active STMicroelectronics part. We source it through our multi-supplier network and can provide a firm quote against your BOM quantity and target delivery date. Contact us with your required volume and lead time to receive current pricing and availability — no stock-holding claim is made here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/VIPER12AS-E","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/VIPER12AS-E 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}}