{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-5EF36-0BH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-5EF36-0BH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-5EF36-0BH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-5EF36-0BH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-5EF36-0BH0, molded case circuit breaker, 3-pole, 20 A (40 °C), 187 kA at 240 V, undervoltage release, 2 aux + 1 trip alarm switch.","salesMarkdown":"## MCCB for high-fault panels — what the ratings mean The Siemens 3VA1120-5EF36-0BH0 is a SENTRON molded case circuit breaker (MCCB) with three poles, rated 20 A continuous at 40 °C and carrying a 187 kA interrupting capacity at 240 V — that is the short-circuit current it can safely clear without welding contacts or venting arc gas into the enclosure. At 415 V the breaking capacity is 121 kA; at 440 V it is 75.6 kA; at 500 V and 690 V it holds at 17 kA. The 800 V rated insulation voltage means the internal creepage and clearance are designed for 800 V systems, so the breaker can be applied in 480/277 V or 600 V panels with margin. The breaker holds its full 20 A rating from 40 °C up to 55 °C; at 60 °C it derates to 19 A, and at 70 °C it stays at 19 A. That is a shallow derating curve, so in a warm panel the part still delivers close to nameplate. Maximum power loss is 14.5 W — useful to know when calculating enclosure heat rise. ## Mechanical fit and panel integration Dimensions are 76.2 mm wide (3 in), 130 mm tall (5.12 in), and 70 mm deep (2.76 in). The 3-pole footprint matches standard SENTRON 3VA panel cutouts and bus-bar centers.","metaTitle":"Siemens 3VA1120-5EF36-0BH0 SENTRON MCCB, 3-Pole, 20 A, 187 k","metaDescription":"Siemens SENTRON 3VA1120-5EF36-0BH0 molded case circuit breaker, 3-pole, 20 A rated at 40 °C, 187 kA breaking 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":"70 mm","Width":"76.2 mm","Height":"130 mm","Maximum":"0 A","Minimum":"0 A","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"75.6 kA","at 500 V":"17 kA","at 690 V":"17 kA","at 40 °C":"20 A","at 45 °C":"20 A","at 50 °C":"20 A","at 55 °C":"20 A","at 60 °C":"19 A","at 65 °C":"19 A","at 70 °C":"19 A","Depth [In]":"2.76 in","Width [In]":"3 in","Height [In]":"5.12 in","Trip Indicator":"Yes","Number Of Poles":"3","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"Yes","Design Of The Product":"Line protection","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"14.5 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Of The Supplied Basic Switch":"3VA11205EF360AA0","Design Of The Auxiliary Switch":"2 auxiliary switches + 1 trip alarm switch HQ","Design Of The Auxiliary Release":"undervoltage release (UVR)","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","Of The Integrated Auxiliary Trip Unit":"3VA9608-0BB11","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"690 V","operating voltage / at DC / rated value":"500 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":"3","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB12","Switching Capacity Class Of The Circuit Breaker":"M","Mechanical Service Life (Operating Cycles) / Typical":"20 000","Type Of Electrical Connection / For Main Current Circuit":"box terminal on both sides","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=374301&mlfb=3VA1120-5EF36-0BH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-5EF36-0BH0/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3VA1120-5EF36-0BH0?","answer":"The part is sourced to order against an RFQ through independent distribution. Submit a request for quote; availability and current pricing are confirmed at quote time."},{"question":"What is the breaking capacity of 3VA1120-5EF36-0BH0 at different voltages?","answer":"At 240 V the interrupting rating is 187 kA; at 415 V it is 121 kA; at 440 V it is 75.6 kA; at 500 V and 690 V it is 17 kA. The rated insulation voltage is 800 V."},{"question":"What is the rated current and thermal derating of this MCCB?","answer":"Rated 20 A continuous at 40 °C through 55 °C; derates to 19 A at 60 °C and 70 °C."},{"question":"What auxiliary switches does 3VA1120-5EF36-0BH0 include?","answer":"It includes two auxiliary switches plus one trip alarm switch (HQ type), providing status feedback for main contacts and trip events."},{"question":"What are the physical dimensions of 3VA1120-5EF36-0BH0?","answer":"Width 76.2 mm (3 in), height 130 mm (5.12 in), depth 70 mm (2.76 in)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-5EF36-0BH0","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/3VA1120-5EF36-0BH0 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}}