{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VM1125-5GE42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VM1125-5GE42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VM1125-5GE42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VM1125-5GE42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VM1125-5GE42-0AA0, 4-pole molded case circuit breaker, 25 A, TM220 thermal-magnetic release, interrupting ratings 187 kA at 240 V, 121 kA at 415 V, 76 kA at 440 V, 17 kA at 500 V.","salesMarkdown":"The Siemens SENTRON 3VM1125-5GE42-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current of 25 A at 40 °C through 50 °C, derating to 23 A at 70 °C. Its TM220 thermal-magnetic release provides LI protection — thermal for overload, magnetic for short-circuit — with an adjustable instantaneous trip threshold up to 320 A. The interrupting ratings are the headline here: 187 kA at 240 V AC, 121 kA at 415 V AC, 76 kA at 440 V AC, and 17 kA at 500 V AC. The 101.6 mm width (4 inches) is a standard 4-pole MCCB footprint — it occupies four 25 mm pole spaces on a DIN rail or bolts directly into a panel backplate. ## Rated insulation voltage and DC capability Rated insulation voltage Ui is 690 V AC, which defines the maximum voltage the breaker's insulation system can withstand continuously. For DC applications, the maximum rated operational voltage is 500 V DC — useful for battery banks or DC bus distribution. The overcurrent release is the TM220 type, a thermal-magnetic design with fixed thermal and adjustable magnetic settings; the magnetic pickup (li) is adjustable up to 320 A. ## Ambient temperature derating curve At 55 °C it derates to 24 A, holds at 24 A through 60 °C, then drops to 23 A at 65 °C and 70 °C. This is a gentle derating slope — the breaker loses only 2 A over a 30 °C rise — so it's suitable for moderately warm enclosures without oversizing. Maximum power loss is 9 W at rated current.","metaTitle":"Siemens 3VM1125-5GE42-0AA0 SENTRON MCCB, 4-Pole, 25 A, 187 k","metaDescription":"Siemens SENTRON 3VM1125-5GE42-0AA0 molded case circuit breaker, 4-pole, 25 A, TM220 release. Rated 187 kA at 240 V, 121 kA at 415 V. Current lifecycle. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"70 mm","Width":"101.6 mm","title":"3VM1125-5GE42-0AA0","Height":"130 mm","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"76 kA","at 500 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":"24 A","at 65 °C":"23 A","at 70 °C":"23 A","Depth [In]":"2.8 in","Width [In]":"4 in","Height [In]":"5.1 in","description":"circuit breaker 3VM1 IEC frame 160 breaking capacity class M Icu=55kA @ 415V 4-pole, line protection TM220, ATFM, In=25A overload protection Ir=18A...25A short-circuit protection Ii=12.8 x In N conductor protection 100% nut keeper kit","Number Of Poles":"4","Product version":"Line protection","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"9 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","rated insulation voltage Ui":"690 V","Ground-Fault Monitoring Version":"Without","Design Of The Overcurrent Release":"TM220","Design Of Short-Circuit Protection":"For switching capacity values in DC power systems, see the 3VA Molded Case Circuit Breaker Manual; link available under Service & Support in the last chapter","protection class IP / on the front":"IP40","reference code / acc. to IEC 81346-2":"Q","Max. rated operational voltage Ue with DC":"500 V","Product Extension / Optional / Motor Drive":"No","Adjustable response value current / li max.":"320 A","Neutral conductors / upgradeable/retrofittable":"No","Protection Function Of The Overcurrent Release":"LI","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"M","Max. rated operational voltage Ue with AC 50/60Hz":"500 V","Mechanical Service Life (Switching Cycles) / Typical":"15 000","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front connection"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/890a9c4e8f724baae13c5de28442f149.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=575474&mlfb=3VM1125-5GE42-0AA0"},"ai":{"faq":[{"question":"What is the interrupting rating of 3VM1125-5GE42-0AA0 at 240 V?","answer":"The interrupting rating at 240 V AC is 187 kA. At 415 V it is 121 kA, at 440 V it is 76 kA, and at 500 V it is 17 kA."},{"question":"Where can I buy 3VM1125-5GE42-0AA0 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What type of overcurrent release does 3VM1125-5GE42-0AA0 use?","answer":"It uses a TM220 thermal-magnetic release providing LI protection — thermal element for overload, magnetic element for short-circuit. The magnetic pickup (li) is adjustable up to 320 A."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VM1125-5GE42-0AA0","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/3VM1125-5GE42-0AA0 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}}