{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1220-5MH32-0AH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1220-5MH32-0AH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1220-5MH32-0AH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1220-5MH32-0AH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1220-5MH32-0AH0, molded case circuit breaker, starter protection, 3-pole, 200 A, 187 kA at 240 V, TM120M overcurrent release.","salesMarkdown":"## MCCB for motor-starting duty The Siemens 3VA1220-5MH32-0AH0 is a SENTRON molded case circuit breaker (MCCB) configured as a starter protector — meaning it combines short-circuit and overload protection in one device sized for motor branch circuits. Rated continuous current Iu is 200 A, and the TM120M thermal-magnetic release provides the inverse-time curve needed to handle inrush without nuisance tripping. The 187 kA interrupting rating at 240 V gives substantial fault-current headroom for low-voltage distribution; at 415 V it still clears 121 kA, and at 690 V it holds 17 kA. That spread covers most industrial panel secondary voltages. ## Thermal derating and panel fit The 200 A rating holds flat from 40 °C through 50 °C ambient. Above that it derates: 192 A at 55 °C, 188 A at 60 °C, 184 A at 65 °C, and 180 A at 70 °C. If the panel ambient runs hot — say a non-ventilated enclosure near a furnace line — size the load to the 70 °C figure, not the nameplate. The 3-pole frame measures 105 mm wide by 158 mm high by 70 mm deep, which fits standard Siemens 3VA panel cutouts and bus-bar spacing. IP40 on the front means it's protected against tools and solid objects larger than 1 mm; the interior of the enclosure handles the rest. ## Voltage and application limits Rated insulation voltage Ui is 800 V, and the maximum DC operational voltage is 500 V — so it can serve DC bus or battery circuits up to that level, though the interrupting ratings listed are AC values. The operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. No undervoltage release, no ground-fault monitoring, no phase-failure detection, and no communication function are built in — this is a straightforward thermal-magnetic protector with auxiliary signaling only.","metaTitle":"Siemens 3VA1220-5MH32-0AH0 SENTRON MCCB, 200 A, 187 kA at 24","metaDescription":"Siemens SENTRON 3VA1220-5MH32-0AH0 molded case circuit breaker, 200 A rated continuous current, 187 kA interrupting at 240 V. Starter protection version with TM120M release. Curren","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"70 mm","Width":"105 mm","Height":"158 mm","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"30 kA","at 690 V":"17 kA","at 40 °C":"200 A","at 45 °C":"200 A","at 50 °C":"200 A","at 55 °C":"192 A","at 60 °C":"188 A","at 65 °C":"184 A","at 70 °C":"180 A","Trip indicator":"Yes","Number of poles":"3","Product version":"Starter protection","Voltage trigger":"No","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 + 1 trip alarm switch HQ","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Rated continuous current Iu":"200 A","Rated insulation voltage Ui":"800 V","Design of the auxiliary release":"without auxiliaryrelease","Ground fault monitoring version":"Without","Design of the overcurrent release":"TM120M","Protection class IP / on the front":"IP40","Operating power / at AC-3 / at 400 V":"75 W","Reference code / acc. to DIN EN 81346-2":"Q","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 / li max.":"2 800 A","Adjustable response value current / li min.":"1 200 A","Neutral conductors / upgradeable/retrofittable":"No","Number of CO contacts / for auxiliary contacts":"3","Protective function of the overcurrent release":"I","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":"250 A","Max. rated operational voltage Ue with AC 50/60Hz":"690 V","Type of electrical connection / for main current circuit":"lug terminal","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=569191&mlfb=3VA1220-5MH32-0AH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1220-5MH32-0AH0/alternatives.json"},"ai":{"faq":[{"question":"What are the key interrupting ratings for 3VA1220-5MH32-0AH0?","answer":"187 kA at 240 V, 121 kA at 415 V, 30 kA at 440 V, and 17 kA at 690 V — these are the short-circuit current ratings the breaker can safely interrupt at each voltage level."},{"question":"Where can I buy 3VA1220-5MH32-0AH0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"What does the TM120M release designation mean?","answer":"TM120M is the thermal-magnetic overcurrent release — the thermal element provides inverse-time overload protection for motor starting, and the magnetic element provides instantaneous short-circuit protection. The 120 refers to the release rating in amperes."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1220-5MH32-0AH0","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/3VA1220-5MH32-0AH0 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}}