{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-5FF42-0HC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-5FF42-0HC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-5FF42-0HC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-5FF42-0HC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-5FF42-0HC0, molded case circuit breaker, 125 A, 4-pole, line protection, with shunt trip (STL) and 2 auxiliary switches HQ, 70 mm depth, 140 mm width, 158 mm height.","salesMarkdown":"The interrupting ratings climb to 187 kA at 240 V and 121 kA at 415 V, dropping to 30 kA at 500 V and 17 kA at 690 V — these are the fault currents the breaker can safely clear at each voltage level, which governs where it can be placed in the fault-current hierarchy of the panel. The thermal derating curve is published: full 250 A rating holds up through 50 °C ambient, then tapers to 243 A at 55 °C, 237 A at 60 °C, 230 A at 65 °C, and 223 A at 70 °C. ## Integrated shunt trip and auxiliary switches No undervoltage release is fitted on this order code; if UVR is needed, that is a different variant. The breaker measures 70 mm deep by 140 mm wide by 158 mm high — standard 4-pole MCCB footprint for a 125 A frame. It mounts into the panel via the SENTRON base plate or direct screw-mount; no DIN-rail adapter is used for this frame size. For a site electrical engineer planning selectivity: the 125 A fixed rating and the published SCCR curves at 240 V (187 kA), 415 V (121 kA), 440 V (75.6 kA), 500 V (30 kA), and 690 V (17 kA) allow coordination with upstream breakers. The line-protection design means it is optimized for feeder or main protection, not motor-starting duty — no adjustable thermal or magnetic settings are available on this fixed-trip variant.","metaTitle":"Siemens 3VA1225-5FF42-0HC0 SENTRON MCCB, 125 A, 4-Pole, Line","metaDescription":"Siemens 3VA1225-5FF42-0HC0 SENTRON molded case circuit breaker, 125 A, 4-pole, line protection. Active production. Shunt trip + 2 aux switches. SCCR 187 kA at 240 V. Sourced to ord","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"70 mm","Width":"140 mm","Height":"158 mm","Maximum":"125 A","Minimum":"125 A","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"75.6 kA","at 500 V":"30 kA","at 690 V":"17 kA","at 40 °C":"250 A","at 45 °C":"250 A","at 50 °C":"250 A","at 55 °C":"243 A","at 60 °C":"237 A","at 65 °C":"230 A","at 70 °C":"223 A","Depth [In]":"2.76 in","Width [In]":"5.51 in","Height [In]":"6.22 in","Trip Indicator":"No","Number Of Poles":"4","Voltage Trigger":"Yes","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"No","Design Of The Product":"Line protection","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"57 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Of The Supplied Basic Switch":"3VA12255FF420AA0","Design Of The Auxiliary Switch":"2 auxiliary switches HQ","Design Of The Auxiliary Release":"shunt trip (STL)","Ground-Fault Monitoring Version":"Without","Insulation Voltage / Rated Value":"800 V","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","design of the N-conductor protection":"50%","Of The Integrated Auxiliary Trip Unit":"3VA9688-0BL30","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"690 V","operating voltage / at DC / rated value":"600 V","reference code / according to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","Protection Function Of The Overcurrent Release":"LI","number of CO contacts / for auxiliary contacts":"2","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AA12","Switching Capacity Class Of The Circuit Breaker":"M","Mechanical Service Life (Operating Cycles) / Typical":"20 000","Type Of Electrical Connection / For Main Current Circuit":"nut keeper kit on both ends","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front terminal"}},"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=568728&mlfb=3VA1225-5FF42-0HC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-5FF42-0HC0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1225-5FF42-0HC0 and how do I get a price?","answer":"This part is sourced through independent distribution and quoted to order against an RFQ. Availability and current pricing are confirmed at the time of quote — submit an RFQ for a firm price and lead time."},{"question":"What is the interrupting rating of 3VA1225-5FF42-0HC0 at 240 V?","answer":"The interrupting rating is 187 kA at 240 V. At 415 V it is 121 kA, at 440 V it is 75.6 kA, at 500 V it is 30 kA, and at 690 V it is 17 kA."},{"question":"Does 3VA1225-5FF42-0HC0 include a shunt trip?","answer":"Yes, this variant includes a shunt trip (STL) release and two auxiliary switches HQ factory-installed. No undervoltage release is fitted."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-5FF42-0HC0","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/3VA1225-5FF42-0HC0 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}}