{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1020-3ED42-0DF0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1020-3ED42-0DF0","canonicalUrl":"https://aoctrl.com/siemens/3VA1020-3ED42-0DF0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1020-3ED42-0DF0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1020-3ED42-0DF0, molded case circuit breaker, 3-pole, 32 A rated continuous current, 187 kA interrupting at 240 V, line protection version with TM220 release.","salesMarkdown":"## MCCB for high-fault panel positions The line protection version is what you spec for feeder or main breaker duty in a panel, not for motor branch-circuit protection. That UVR coil will drop the breaker if control voltage is lost — a common requirement for emergency-stop circuits or safety interlock schemes. ## Interrupting ratings across voltages The interrupting capacity drops as voltage rises: 187 kA at 240 V, 121 kA at 415 V, 76 kA at 440 V, and 17 kA at both 500 V and 690 V. ## Current derating and ambient temperature The 32 A rating holds steady up to 50 °C ambient; at 60 °C it derates to 31 A, and at 70 °C to 30 A. That's minimal thermal drift for a thermal-magnetic MCCB — the TM220 release is well-compensated. The breaker is 3 inches wide (about 76 mm) and 130 mm tall — standard MCCB footprint for a 3-pole frame at this rating. The IP40 front protection means it's suitable for a closed panel; no additional sealing is required for normal indoor environments.","metaTitle":"Siemens 3VA1020-3ED42-0DF0 SENTRON MCCB, 32 A, 3-Pole, 187 k","metaDescription":"Siemens SENTRON 3VA1020-3ED42-0DF0 molded case circuit breaker, 32 A rated, 3-pole, 187 kA interrupting at 240 V. Line protection with TM220 release. Current lifecycle stage; sourc","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Height":"130 mm","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"76 kA","at 500 V":"17 kA","at 690 V":"17 kA","at 40 °C":"32 A","at 45 °C":"32 A","at 50 °C":"32 A","at 60 °C":"31 A","at 65 °C":"30 A","at 70 °C":"30 A","Width [in]":"3 in","Trip indicator":"Yes","Number of poles":"3","Product version":"Line protection","Voltage trigger":"No","lifecycle_stage":"current","Product brand name":"SENTRON","Product designation":"Molded case circuit breaker","Latching - endurance":"15 000","Undervoltage Release":"Yes","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Auxiliary contact version":"1 auxiliary switch + 1 trip alarm switch HQ","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Rated continuous current Iu":"32 A","Rated insulation voltage Ui":"800 V","Design of the auxiliary release":"Undervoltage release (UVR)","Ground fault monitoring version":"Without","Of The Integrated Auxiliary Trip":"3VA9608-0BB25","Design of the overcurrent release":"TM220","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","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.":"32 A","Adjustable response value current / li max.":"320 A","Adjustable response value current / li min.":"320 A","Adjustable response value current / lr min.":"22 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":"3VA9988-0AB12","Switching capacity class of the circuit breaker":"M","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=1119370&mlfb=3VA1020-3ED42-0DF0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1020-3ED42-0DF0/alternatives.json"},"ai":{"faq":[{"question":"What type of overcurrent release does this MCCB have?","answer":"It uses a TM220 thermal-magnetic fixed release. This is a line protection version, not a motor-protection or electronic-trip model. The release is not field-interchangeable."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1020-3ED42-0DF0","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/3VA1020-3ED42-0DF0 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}}