{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2125-0MS32-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2125-0MS32-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2125-0MS32-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2125-0MS32-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2 molded case circuit breaker, 3VA2125-0MS32-0AA0, 3-pole, 25 A continuous rating, ETU310M electronic overcurrent release, adjustable from 75 A to 375 A, breaking capacity 440 kA at 415 V AC.","salesMarkdown":"It carries a continuous current rating of 25 A and uses the ETU310M electronic overcurrent release, which gives you an adjustable trip range of 75 A minimum to 375 A maximum — that's the short-circuit and overload protection window you set for the motor branch. Three-pole construction handles three-phase motor loads. The interrupting ratings are what make this part stand out: 440 kA at 415 V AC and 187 kA at 690 V AC. The operating voltage ceiling is 690 V AC, and the rated insulation voltage is 800 V, so it's comfortable on 400 V to 690 V line-to-line systems common in European and North American industrial plants. ## Thermal performance and derating The 25 A continuous rating holds flat from 40 °C all the way up to 70 °C ambient — no derating needed across that entire span. That's unusual for an MCCB; most thermal-magnetic breakers start derating above 40 °C. The ETU310M electronic trip keeps the threshold stable regardless of enclosure heat buildup, which matters when the breaker shares a crowded panel with drives or contactors that raise the internal temperature. Operating ambient range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. Maximum power loss is 0.5 W — negligible for panel cooling calculations. Dimensions: 105 mm wide, 181 mm tall, 86 mm deep. That 105 mm width is the standard 3-pole MCCB footprint for the 3VA2 frame — it drops into the same mounting cutout and bus-bar spacing as other 3VA2 three-pole units. If your panel was laid out for a 3VA2125-8KQ42-0AA0 or similar 3VA2 sibling, this 3VA2125-0MS32-0AA0 shares the same mechanical envelope; no rewiring or re-drilling needed at the mounting plate.","metaTitle":"Siemens 3VA2125-0MS32-0AA0 SENTRON MCCB, 25A, 3-Pole, ETU310","metaDescription":"Siemens 3VA2125-0MS32-0AA0 SENTRON molded case circuit breaker, 25 A continuous, 3-pole, ETU310M release, 440 kA at 415 V. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"86 mm","Width":"105 mm","title":"3VA2125-0MS32-0AA0","Height":"181 mm","Maximum":"375 A","Minimum":"75 A","at 415 V":"440 kA","at 690 V":"187 kA","at 40 °C":"25 A","at 45 °C":"25 A","at 50 °C":"25 A","at 55 °C":"25 A","at 60 °C":"25 A","at 65 °C":"25 A","at 70 °C":"25 A","Depth [In]":"3.39 in","Width [In]":"4.13 in","Height [In]":"7.13 in","description":"circuit breaker 3VA2 IEC frame 160 breaking capacity class E Icu=200 kA @ 415 V 3-pole motor starter protection ETU310M, I, In=25A short circuit protection Ii=3...15 x In busbar connection","Trip Indicator":"No","Number Of Poles":"3","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"No","Design Of The Product":"Motor protection","Communication Function":"No","Phase Failure Detection":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"0.5 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Ground-Fault Monitoring Version":"Without","Continuous Current / Rated Value":"25 A","Insulation Voltage / Rated Value":"800 V","Design Of The Overcurrent Release":"ETU310M","protection class IP / on the front":"IP40","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"690 V","reference code / according to IEC 81346-2":"Q","Continuous Current / Rated Value / Maximum":"160 A","Product Extension / Optional / Motor Drive":"Yes","Protection Function Of The Overcurrent Release":"I","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"E","Mechanical Service Life (Operating Cycles) / Typical":"25 000","Type Of Electrical Connection / For Main Current Circuit":"on both sides nut keeper kit","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front terminal"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/641a6843e8dc2f758bb6426196efa871.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1417772&mlfb=3VA2125-0MS32-0AA0"},"ai":{"faq":[{"question":"What is the closest functional alternative to 3VA2125-0MS32-0AA0?","answer":"The 3VA2125-8KQ42-0AA0 is a peer within the same 3VA2 frame and pole count. The deciding difference is the overcurrent release type; the -0MS32-0AA0 carries the ETU310M electronic release with adjustable 75–375 A trip range, while the -8KQ42-0AA0 uses a different release variant. Both share the same 105 mm width and 3-pole footprint, so they swap mechanically without panel rework."},{"question":"Where can I buy 3VA2125-0MS32-0AA0?","answer":"This part is sourced to order through independent distribution. Submit an RFQ for current availability and pricing; stock and lead time are confirmed at the time of quotation."},{"question":"What are the physical dimensions of 3VA2125-0MS32-0AA0?","answer":"Width 105 mm, height 181 mm, depth 86 mm — the standard 3-pole 3VA2 frame footprint."},{"question":"Does 3VA2125-0MS32-0AA0 fit in a panel designed for 3VA2125-8KQ42-0AA0?","answer":"Yes. Both are 3-pole 3VA2 frame breakers with identical width (105 mm), so the mounting cutout and bus-bar spacing are the same. No rewiring or panel modification is required for the swap."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2125-0MS32-0AA0","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/3VA2125-0MS32-0AA0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}