{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2140-5MN32-0BH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2140-5MN32-0BH0","canonicalUrl":"https://aoctrl.com/siemens/3VA2140-5MN32-0BH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2140-5MN32-0BH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2, molded case circuit breaker, 3VA2140-5MN32-0BH0, 40 A, 3-pole, ETU350M electronic trip, 187 kA at 240 V, undervoltage release, 2 aux + 1 alarm switch.","salesMarkdown":"It carries a 187 kA interrupting capacity at 240 V and still holds 121 kA at 415 V and 440 V — that's extreme SCCR for a 40 A frame, meaning it can sit upstream of a high-fault panel without cascading failure. Above 50 °C it rolls off gradually: 38.4 A at 55 °C, 37.6 A at 60 °C, 36.8 A at 65 °C, and 36 A at 70 °C. That 10% drop at the top end still leaves headroom for a 30 A motor load in a hot cabinet. The 75 W maximum power loss means you need to account for heat dissipation if the breaker is packed tight with other devices. ## Built-in undervoltage release and auxiliary signaling This variant includes an integrated undervoltage release (UVR) — no external module needed. The trip indicator on the front gives a local visual flag when the breaker has tripped on fault. ## Motor protection with ETU350M The ETU350M electronic trip unit is configured for motor protection — it includes phase failure detection (monitors all three phases) and an LSI trip curve (long-time, short-time, instantaneous). That means it can protect a motor against overload, short circuit, and single-phasing without a separate motor protection relay. The 20 000 latching endurance cycles reflect the mechanical life of the switching mechanism under normal operation.","metaTitle":"Siemens 3VA2140-5MN32-0BH0 SENTRON MCCB, 40 A, 187 kA at 240","metaDescription":"Siemens 3VA2140-5MN32-0BH0 SENTRON molded case circuit breaker, 40 A, 3-pole, ETU350M, 187 kA at 240 V. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"86 mm","Width":"105 mm","Height":"181 mm","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"121 kA","at 500 V":"75.6 kA","at 690 V":"17 kA","at 40 °C":"40 A","at 45 °C":"40 A","at 50 °C":"40 A","at 55 °C":"38.4 A","at 60 °C":"37.6 A","at 65 °C":"36.8 A","at 70 °C":"36 A","Trip indicator":"Yes","Number of poles":"3","Product version":"Motor protection","Voltage trigger":"No","lifecycle_stage":"current","Product brand name":"SENTRON","Product designation":"Molded case circuit breaker","Latching - endurance":"20 000","Undervoltage Release":"Yes","Communication Function":"No","Phase failure detection":"Yes","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Power loss [W] / maximum":"75 W","Auxiliary contact version":"2 auxiliary switches + 1 trip alarm switch HQ","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Rated continuous current Iu":"40 A","Rated insulation voltage Ui":"800 V","Of The Supplied Basic Switch":"3VA2140-5MN32-0AA0","Design of the auxiliary release":"Undervoltage release (UVR)","Ground fault monitoring version":"Without","Of The Integrated Auxiliary Trip":"3VA9608-0BB11","Design of the overcurrent release":"ETU350M","Protection class IP / on the front":"IP40","Operating power / at AC-3 / at 400 V":"15 W","Reference code / acc. to DIN EN 81346-2":"Q","Adjustable response value time / tr max.":"17","Adjustable response value time / tr min.":"4","Adjustable response value time / tsd max.":"0.03 s","Adjustable response value time / tsd min.":"0.03 s","Undervoltage Release With Leading Contact":"No","Product extension / optional / motor drive":"Yes","Adjustable response value current / Ir max.":"40 A","Adjustable response value current / li max.":"600 A","Adjustable response value current / li min.":"600 A","Adjustable response value current / lr min.":"16 A","Adjustable response value current / Isd max.":"600 A","Adjustable response value current / Isd min.":"120 A","Neutral conductors / upgradeable/retrofittable":"No","Number of CO contacts / for auxiliary contacts":"3","Protective function of the overcurrent release":"LSI","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB12","Switching capacity class of the circuit breaker":"M","Max. rated operational current of the frame size":"160 A","Max. rated operational voltage Ue with AC 50/60Hz":"690 V","Type of electrical connection / for main current circuit":"Lug terminal","Arrangement of electrical connectors / for main current circuit":"Front terminal"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/cda978e31ec81fb539d5632cb59bd0b3.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=569653&mlfb=3VA2140-5MN32-0BH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2140-5MN32-0BH0/alternatives.json"},"ai":{"faq":[{"question":"What is 3VA2140-5MN32-0BH0's interrupting capacity at 415 V?","answer":"It carries 121 kA at 415 V, which is typical for a high-fault industrial panel at 400 V class. That same rating holds at 440 V as well."},{"question":"Does this MCCB include an undervoltage release?","answer":"Yes, the undervoltage release (UVR) is integrated into this variant — no external module or wiring needed. It also comes with 2 auxiliary switches and 1 trip alarm switch for remote signaling."},{"question":"What thermal derating applies above 50 °C?","answer":"The breaker carries full 40 A up to 50 °C. Above that it derates: 38.4 A at 55 °C, 37.6 A at 60 °C, 36.8 A at 65 °C, and 36 A at 70 °C — about a 10% drop at the top end."},{"question":"Where can I buy 3VA2140-5MN32-0BH0 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — no stock count or price is published here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2140-5MN32-0BH0","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/3VA2140-5MN32-0BH0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}