{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1020-4ED32-0BC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1020-4ED32-0BC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1020-4ED32-0BC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1020-4ED32-0BC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1020-4ED32-0BC0, 3-pole molded case circuit breaker, 20 A rated at 40 °C, 121 kA breaking capacity at 240 V AC, with undervoltage release and 2 auxiliary switches HQ.","salesMarkdown":"The Siemens 3VA1020-4ED32-0BC0 is a 3-pole SENTRON molded case circuit breaker (MCCB) rated 20 A continuously at 40 °C ambient, with a thermal derating curve that holds 20 A up to 55 °C and drops to 19 A at 70 °C. That flat plateau from 40 to 55 °C is useful in a warm panel — you're not losing headroom until the enclosure is genuinely hot. Breaking capacity runs 121 kA at 240 V AC, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. The 70 mm depth, 76.2 mm width, and 130 mm height fit the standard SENTRON 3VA mounting footprint, so it swaps into an existing panel layout without re-drilling the backplate. ## Undervoltage release and auxiliary switches No communication function on this order code; it's a standalone line-protection device. The basic switch supplied is 3VA10204ED320AA0. Trip indicator is not fitted — you'd rely on the auxiliary switch state or the handle position to confirm tripped status. ## Panel fit against a higher-current sibling A buyer comparing this 20 A breaker (3VA1020-4ED32-0BC0) against the 100 A 3VA1110-5ED36-0AC0 should know the physical footprint differs — the 100 A frame is larger in all dimensions. The 20 A unit drops into a panel cutout sized for the 3VA10 frame; the 100 A unit needs the 3VA11 frame spacing. No rewiring is possible without reworking the bus bars and enclosure layout. For a 20 A feeder branch, this is the correct frame.","metaTitle":"Siemens 3VA1020-4ED32-0BC0 SENTRON MCCB, 3-pole 20A, 121kA a","metaDescription":"Siemens SENTRON 3VA1020-4ED32-0BC0 molded case circuit breaker, 3-pole, 20 A rated at 40 °C, 121 kA breaking capacity at 240 V AC. Active production. Sourced to order against RFQ.","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":"121 kA","at 415 V":"75.6 kA","at 440 V":"52.5 kA","at 500 V":"11.9 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":"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":"No","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":"3VA10204ED320AA0","Design Of The Auxiliary Switch":"2 auxiliary switches 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":"TM210","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":"No","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":"S","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=244878&mlfb=3VA1020-4ED32-0BC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1020-4ED32-0BC0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3VA1020-4ED32-0BC0 at 240 V?","answer":"121 kA at 240 V AC, with 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V."},{"question":"Where can I buy 3VA1020-4ED32-0BC0?","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 position."},{"question":"Does 3VA1020-4ED32-0BC0 include an undervoltage release?","answer":"Yes, it ships with an undervoltage release (UVR) and two HQ auxiliary switches. The UVR trips the breaker on loss of control voltage."},{"question":"What is the rated current of 3VA1020-4ED32-0BC0 at 40 °C?","answer":"20 A continuously at 40 °C, derating to 19 A at 70 °C."},{"question":"What compliance documentation is available for 3VA1020-4ED32-0BC0?","answer":"As a Siemens SENTRON MCCB, it carries UL, CSA, and IEC certifications per the series standard. RoHS and REACH declarations are available from the manufacturer's documentation portal."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1020-4ED32-0BC0","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/3VA1020-4ED32-0BC0 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}}