{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-5EF36-0KH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-5EF36-0KH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-5EF36-0KH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-5EF36-0KH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-5EF36-0KH0, molded case circuit breaker, 3-pole, line protection, rated 20 A at 40 °C, breaking capacity 121 kA at 415 V, with shunt trip (STL) and 2 aux + 1 trip alarm switch.","salesMarkdown":"The Siemens 3VA1120-5EF36-0KH0 is a SENTRON molded case circuit breaker (MCCB) for line protection, rated 20 A continuously at 40 °C ambient — no derating needed up to 55 °C, then it steps down to 19 A at 60–70 °C. That thermal curve means you can load it at 20 A in most panel environments without oversizing the frame. Insulation voltage is rated 800 V, so the breaker is suited for 480 V and 600 V class systems as well — the 121 kA at 415 V is the highest published interrupting rating, but the 17 kA at 690 V confirms it can handle 690 V line-to-line with lower available fault current. The shunt trip (STL) allows remote tripping from a safety relay or emergency-stop circuit; the auxiliary switch configuration (2 aux + 1 trip alarm) gives status feedback for PLC or SCADA. Maximum power loss is 12 W at rated load — negligible for panel heat budgeting but worth noting if the breaker is enclosed in a small, sealed sub-panel. ## Deployment context The 3-pole design is typical for three-phase motor branch circuits, distribution feeders, or transformer protection. The shunt trip and auxiliary switches are factory-fitted, so no field assembly of internal accessories is required — wire the control voltage to the STL coil and the aux contacts back to the PLC input card.","metaTitle":"Siemens 3VA1120-5EF36-0KH0 SENTRON MCCB, 3-Pole, 20 A, 121 k","metaDescription":"Siemens 3VA1120-5EF36-0KH0 SENTRON molded case circuit breaker, 3-pole, 20 A rated at 40 °C, 121 kA breaking capacity at 415 V. Active production. Available to order — request a qu","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":"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":"12 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":"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","Of The Integrated Auxiliary Trip Unit":"3VA9688-0BL33","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=308559&mlfb=3VA1120-5EF36-0KH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-5EF36-0KH0/alternatives.json"},"ai":{"faq":[{"question":"What is 3VA1120-5EF36-0KH0's listed depth (70 mm) on this component line?","answer":"The depth is 70 mm (2.76 in), which is standard for the 3VA1 frame size."},{"question":"What is 3VA1120-5EF36-0KH0's listed width (76.2 mm) on this component line?","answer":"The width is 76.2 mm (3 in), corresponding to a 3-pole MCCB in the 3VA1 family."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-5EF36-0KH0","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/3VA1120-5EF36-0KH0 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}}