{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-4EF36-0HC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-4EF36-0HC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-4EF36-0HC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF36-0HC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-4EF36-0HC0, molded case circuit breaker, line protection, 3-pole, 20 A rated, TM240 thermal-magnetic trip, 121 kA at 240 V, 75.6 kA at 415 V, with shunt trip (STL) and 2 auxiliary switches HQ.","salesMarkdown":"The Siemens SENTRON 3VA1120-4EF36-0HC0 is a 3-pole molded case circuit breaker (MCCB) rated for 20 A continuous current across a wide ambient range — full 20 A from 40 °C up to 50 °C, then derating to 18 A at 70 °C. This means the breaker holds its rating in warm enclosures without needing to oversize, provided the panel ambient stays below 50 °C. Above that, the thermal curve in the TM240 trip unit governs the actual continuous current. Interrupting capacity is the headline: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and still 11.9 kA at 690 V. That high fault-current handling at 240 V and 415 V means this MCCB can be used in high-available-fault-current distribution panels without needing a current-limiting upstream fuse — it clears the fault within its own rating. The 690 V figure is low enough that for 690 V systems, check the available fault current against the 11.9 kA limit. For a line-protection MCCB, that's a straightforward, field-proven design. ## Shunt trip and auxiliary switches — remote tripping built in The shunt trip allows remote opening of the breaker via a control signal — typical for emergency-stop circuits or remote load shedding in an automated warehouse shuttle system, where a stalled crane blocking an aisle needs a remote breaker trip without sending a technician into the racking. The IP40 front protection means the operator interface is sealed against tools and small objects, but the breaker is intended for indoor panel mounting, not washdown environments. ## Panel footprint and mounting Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep — a compact 3-pole MCCB footprint that fits standard DIN-rail or panel-mount cutouts. The 76.2 mm width (3 modules of 25.4 mm) matches the typical 3-pole modular breaker slot in a SENTRON distribution board, so it drops into existing panel layouts without rewiring the busbar.","metaTitle":"Siemens 3VA1120-4EF36-0HC0 SENTRON MCCB, 20 A, 3-Pole, TM240","metaDescription":"Siemens SENTRON 3VA1120-4EF36-0HC0 molded case circuit breaker, 20 A rated, 3-pole, TM240 trip unit, 121 kA at 240 V interrupting capacity. Active production. Sourced to order. Req","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","at 240 V":"121 kA","at 415 V":"75.6 kA","at 440 V":"52.5 kA","at 690 V":"11.9 kA","at 40 °C":"20 A","at 45 °C":"20 A","at 50 °C":"20 A","at 55 °C":"19.2 A","at 60 °C":"18.8 A","at 65 °C":"18.4 A","at 70 °C":"18 A","Trip indicator":"No","Number of poles":"3","Product version":"Line protection","Voltage trigger":"Yes","lifecycle_stage":"current","Product brand name":"SENTRON","Product designation":"Molded case circuit breaker","Latching - endurance":"15 000","Undervoltage Release":"No","Communication Function":"No","Phase failure detection":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Auxiliary contact version":"2 auxiliary switches HQ","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Rated continuous current Iu":"20 A","Rated insulation voltage Ui":"800 V","Design of the auxiliary release":"Shunt trip (STL)","Ground fault monitoring version":"Without","Of The Integrated Auxiliary Trip":"3VA9688-0BL30","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","Reference code / acc. to DIN EN 81346-2":"Q","Adjustable response value time / tr max.":"1","Adjustable response value time / tr min.":"1","Max. rated operational voltage Ue with DC":"500 V","Undervoltage Release With Leading Contact":"No","Product extension / optional / motor drive":"Yes","Adjustable response value current / Ir max.":"20 A","Adjustable response value current / li max.":"320 A","Adjustable response value current / li min.":"160 A","Adjustable response value current / lr min.":"14 A","Neutral conductors / upgradeable/retrofittable":"No","Number of CO contacts / for auxiliary contacts":"2","Protective function of the overcurrent release":"LI","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AA12","Switching capacity class of the circuit breaker":"S","Max. rated operational current of the frame size":"160 A","Max. rated operational voltage Ue with AC 50/60Hz":"690 V","Type of electrical connection / for main current circuit":"box terminal","Arrangement of electrical connectors / for main current circuit":"Front terminal","Type of connectable conductor cross-section, round conductor terminal, stranded":"1 x (1.5 - 70 mm²)"}},"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=412295&mlfb=3VA1120-4EF36-0HC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF36-0HC0/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3VA1120-4EF36-0HC0?","answer":"Submit an RFQ through this listing. Availability and current pricing are confirmed at quote time through independent distribution channels. No price or stock figures are published here."},{"question":"Will 3VA1120-4EF36-0HC0 drop into a panel that was specified around 3VA1010-4ED36-0CC0 without rewiring?","answer":"Both are 3-pole SENTRON MCCBs with a 76.2 mm width, so the physical footprint and busbar slots are identical. The 3VA1120-4EF36-0HC0 carries a shunt trip and 2 auxiliary switches, whereas the 3VA1010-4ED36-0CC0 may differ in trip unit or accessories — check the wiring diagram for the auxiliary terminal assignments. Panel cutout and mounting are a direct swap."},{"question":"What compliance documentation does this brand provide for 3VA1120-4EF36-0HC0?","answer":"As a Siemens SENTRON MCCB, it carries the standard CE marking and is designed to IEC/EN 60947-2. RoHS and REACH compliance declarations are available from Siemens documentation. UL/CSA listings depend on the exact variant — the evidence does not list specific UL file numbers for this order code."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-4EF36-0HC0","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/3VA1120-4EF36-0HC0 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}}