{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1125-5EF32-0AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1125-5EF32-0AB0","canonicalUrl":"https://aoctrl.com/siemens/3VA1125-5EF32-0AB0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1125-5EF32-0AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1125-5EF32-0AB0, 3-pole molded case circuit breaker, 25 A rated continuous current, TM240 thermal-magnetic release, 187 kA at 240 V, 2 auxiliary switches HP, IP40 front.","salesMarkdown":"At 415 V it's still 121 kA, at 440 V it's 75.6 kA, and at 690 V it drops to 17 kA. What that tells you: on a 240 V or 415 V distribution board with high available fault current (say, close to a large transformer), this MCCB gives you the headroom to avoid cascading failures upstream. ## Thermal derating — the real-world current you can expect At 55 °C it drops to 24 A, at 60 °C to 23.5 A, at 65 °C to 23 A, and at 70 °C to 22.5 A. ## Auxiliary contacts and mounting This version comes with 2 auxiliary switches HP (high-performance) pre-fitted — they signal the breaker's open/closed and tripped status back to a PLC or indicator lamp without needing a separate aux block. The front face is IP40, so it's splash-protected from the front but not sealed against hose-down. Depth is 70 mm, width 76.2 mm, height 130 mm — it fits the standard SENTRON 3VA panel footprint, so it swaps into an existing 3VA cutout without re-drilling the mounting plate.","metaTitle":"Siemens 3VA1125-5EF32-0AB0 SENTRON MCCB, 25 A, 187 kA at 240","metaDescription":"Siemens SENTRON 3VA1125-5EF32-0AB0 molded case circuit breaker, 3-pole, 25 A rated, 187 kA at 240 V. TM240 release, 2 aux switches. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"70 mm","Width":"76.2 mm","Height":"130 mm","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"75.6 kA","at 690 V":"17 kA","at 40 °C":"25 A","at 45 °C":"25 A","at 50 °C":"25 A","at 55 °C":"24 A","at 60 °C":"23.5 A","at 65 °C":"23 A","at 70 °C":"22.5 A","Trip indicator":"No","Number of poles":"3","Product version":"Line protection","Voltage trigger":"No","lifecycle_stage":"current","Product brand name":"SENTRON","Product designation":"Molded case circuit breaker","Latching - endurance":"15 000","Undervoltage Release":"No","Communication Function":"No","Phase failure detection":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Auxiliary contact version":"2 auxiliary switches HP","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Rated continuous current Iu":"25 A","Rated insulation voltage Ui":"800 V","Design of the auxiliary release":"without auxiliaryrelease","Ground fault monitoring version":"Without","Design of the overcurrent release":"TM240","Design of short-circuit protection":"For switching power values in DC networks, see the 3VA molded case circuit breaker device manual; link to be found under Service & Support in the last chapter","Protection class IP / on the front":"IP40","Reference code / acc. to DIN EN 81346-2":"Q","Adjustable response value time / tr max.":"1","Adjustable response value time / tr min.":"1","Max. rated operational voltage Ue with DC":"500 V","Undervoltage Release With Leading Contact":"No","Product extension / optional / motor drive":"Yes","Adjustable response value current / Ir max.":"25 A","Adjustable response value current / li max.":"320 A","Adjustable response value current / li min.":"160 A","Adjustable response value current / lr min.":"18 A","Neutral conductors / upgradeable/retrofittable":"No","Number of CO contacts / for auxiliary contacts":"2","Protective function of the overcurrent release":"LI","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AA11","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","Type of connectable conductor cross-section, connection screw, width x thickness , max.":"17 x 6.5","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"12 x 0"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=503870&mlfb=3VA1125-5EF32-0AB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1125-5EF32-0AB0/alternatives.json"},"ai":{"faq":[{"question":"What is the interrupting capacity at 240 V for this MCCB?","answer":"The interrupting capacity at 240 V is 187 kA, which is unusually high for a 25 A frame — it handles very high fault currents typical of large transformer secondaries."},{"question":"Where can I buy 3VA1125-5EF32-0AB0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"What is the rated continuous current at 50 °C?","answer":"At 50 °C the breaker holds the full 25 A without derating — derating starts at 55 °C where it drops to 24 A."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1125-5EF32-0AB0","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/3VA1125-5EF32-0AB0 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}}