{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1020-4ED32-0KC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1020-4ED32-0KC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1020-4ED32-0KC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1020-4ED32-0KC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1020-4ED32-0KC0, molded case circuit breaker, 3-pole, 20 A rated, 121 kA breaking capacity at 240 V, line protection with shunt trip release.","salesMarkdown":"## What this MCCB is and what it does The Siemens SENTRON 3VA1020-4ED32-0KC0 is a 3-pole molded case circuit breaker (MCCB) designed for line protection — meaning it sits at the feeder or branch circuit to guard against overloads and short circuits, not motor or generator protection. It carries a rated current of 20 A across the 40 °C to 55 °C band, derating to 19 A at 60 °C through 70 °C. The breaking capacity is the headline: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. That 121 kA figure at 240 V tells you this breaker can interrupt a fault current up to that level without failing — critical for high-fault panels near large transformers or upstream of multiple drives. ## What the ratings mean for your panel Rated insulation voltage is 800 V, so the breaker is rated for use in 690 V systems with margin. The 3-pole design fits standard 3-phase feeders. Power loss is 12 W maximum — that's the heat it dumps into the enclosure at full rated current; factor it into your thermal budget if you're stacking multiple breakers in a sealed panel. The auxiliary switch configuration is 2 HQ switches, and the auxiliary release is a shunt trip (STL) — that shunt trip lets you remotely trip the breaker via a control signal, which is useful for emergency-stop circuits or interlocking with a fire alarm system. No undervoltage release, no ground-fault monitoring, no communication function on this variant. It's a straightforward line-protection MCCB with a shunt trip for remote trip capability. ## Physical fit and panel integration Dimensions are 130 mm height, 76.2 mm width, 70 mm depth — that's a standard SENTRON 3VA form factor. It mounts on a DIN rail or can be screw-mounted to a backplate. The 70 mm depth is shallow enough for most 200 mm deep enclosures; check your door clearance if you have a rotary handle mechanism. The width of 76.2 mm (3 inches) is a 3-pole footprint; a 4-pole version would be wider. The shunt trip wiring needs a separate control circuit — factor that into your panel layout.","metaTitle":"Siemens 3VA1020-4ED32-0KC0 SENTRON MCCB, 20A, 121kA at 240V","metaDescription":"Siemens SENTRON 3VA1020-4ED32-0KC0 molded case circuit breaker, 3-pole, 20A rated, 121kA breaking capacity at 240V. Line protection with shunt trip. Available 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":"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":"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":"3VA10204ED320AA0","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":"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":"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":"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=383825&mlfb=3VA1020-4ED32-0KC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1020-4ED32-0KC0/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3VA1020-4ED32-0KC0?","answer":"Submit an RFQ through this listing. We source it to order; availability and current pricing are confirmed at quote time — no speculative lead times here."},{"question":"What is the breaking capacity of this MCCB at different voltages?","answer":"121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. That 121 kA at 240 V is the highest rating — it's sized for high-fault panels."},{"question":"What auxiliary options are fitted on this breaker?","answer":"It includes 2 HQ auxiliary switches and a shunt trip (STL) release. No undervoltage release, no ground-fault monitoring, no communication module."},{"question":"Will 3VA1020-4ED32-0KC0 drop into a panel that was specified around 5SQ2370-2YA05 without rewiring?","answer":"Not directly — the 5SQ2370 series is a different form factor and terminal arrangement. The 3VA1020 uses the standard SENTRON 3VA footprint (130 x 76.2 x 70 mm). You'd need to verify mounting hole pattern and busbar spacing before assuming a drop-in swap."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1020-4ED32-0KC0","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/3VA1020-4ED32-0KC0 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}}