{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1220-4GF42-0JC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1220-4GF42-0JC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1220-4GF42-0JC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1220-4GF42-0JC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1220-4GF42-0JC0, molded case circuit breaker, 4-pole, 200 A, interrupting ratings 121 kA at 240 V through 11.9 kA at 690 V, with shunt trip and 2 HQ auxiliary switches.","salesMarkdown":"## What it is and what it does The Siemens 3VA1220-4GF42-0JC0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection — the main disconnect and fault interrupter on a feeder or large load. It's a 4-pole unit rated a solid 200 A continuous (no derating needed up to 50 °C ambient, then it steps down to 176 A at 70 °C). The interrupting capacity is where this breaker earns its keep: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, 17 kA at 500 V, and 11.9 kA at 690 V. That's serious fault-clearing headroom for industrial distribution — it'll ride through a bolted fault on a 400 V bus without the upstream breaker having to back it up. It ships with a shunt trip (STL) release and two HQ auxiliary switches built in, so you can remote-trip it and get status feedback without adding accessory modules. Rated insulation voltage is 800 V, and the maximum power loss at rated load is 42 W — relevant for enclosure heat calculations. ## Panel fit and integration Footprint is 140 mm wide by 158 mm tall by 70 mm deep — that's a standard MCCB cutout for a 4-pole frame. It mounts on a DIN rail or directly to a backplate via the screw terminals. The 70 mm depth means it clears most 200 mm deep enclosures with room for wiring gutters.","metaTitle":"Siemens 3VA1220-4GF42-0JC0 SENTRON MCCB, 200 A, 4-Pole, 121","metaDescription":"Siemens 3VA1220-4GF42-0JC0 SENTRON molded case circuit breaker, 200 A rated, 4-pole, interrupting up to 121 kA at 240 VAC. 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":"140 mm","Height":"158 mm","Maximum":"200 A","Minimum":"200 A","at 240 V":"121 kA","at 415 V":"75.6 kA","at 440 V":"52.5 kA","at 500 V":"17 kA","at 690 V":"11.9 kA","at 40 °C":"200 A","at 45 °C":"200 A","at 50 °C":"200 A","at 55 °C":"194 A","at 60 °C":"188 A","at 65 °C":"182 A","at 70 °C":"176 A","Depth [In]":"2.76 in","Width [In]":"5.51 in","Height [In]":"6.22 in","Trip Indicator":"No","Number Of Poles":"4","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":"42 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Of The Supplied Basic Switch":"3VA12204GF420AA0","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":"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","design of the N-conductor protection":"100%","Of The Integrated Auxiliary Trip Unit":"3VA9688-0BL32","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"690 V","operating voltage / at DC / rated value":"600 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":"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=568445&mlfb=3VA1220-4GF42-0JC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1220-4GF42-0JC0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 3VA1220-4GF42-0JC0?","answer":"We source and quote this breaker to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commitment."},{"question":"What are the interrupting ratings at different voltages?","answer":"At 240 V it interrupts 121 kA, at 415 V it's 75.6 kA, at 440 V it's 52.5 kA, at 500 V it's 17 kA, and at 690 V it's 11.9 kA. That covers most industrial low-voltage distribution scenarios."},{"question":"What is the thermal derating curve for this MCCB?","answer":"It carries the full 200 A from 40 °C up to 50 °C ambient. At 55 °C it derates to 194 A, at 60 °C to 188 A, at 65 °C to 182 A, and at 70 °C to 176 A. No derating needed for normal panel temperatures."},{"question":"What accessories come with this breaker?","answer":"It includes a shunt trip (STL) release for remote tripping and two HQ auxiliary switches for status indication. No undervoltage release, no ground-fault monitoring, no communication function on this variant."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1220-4GF42-0JC0","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/3VA1220-4GF42-0JC0 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}}