{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1340-4GF42-0AH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1340-4GF42-0AH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1340-4GF42-0AH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1340-4GF42-0AH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1340-4GF42-0AH0, molded case circuit breaker, 400 A, 4-pole, line protection, TM240 release, 121 kA at 240 V, 110 mm depth, 184 mm width, 248 mm height.","salesMarkdown":"It carries a TM240 thermal-magnetic release, meaning the thermal trip element is calibrated for the 400 A frame, and the magnetic instantaneous pickup is fixed at 240 A per pole. The 110 mm depth and 184 mm width are the panel-cutout dimensions you need to plan around. At 248 mm tall, it fits standard MCCB mounting footprints in most 600 V switchboards. The rated insulation voltage is 800 V, so it's comfortable on 480 V and 600 V systems — the 690 V interrupting rating of 11.9 kA is what governs on a 600 V corner-grounded delta or a 690 V IT system. ## Interrupting capacity across system voltages The SCCR drops as voltage climbs: 121 kA at 240 V, 75.6 kA at 415 V and 440 V, 52.5 kA at 500 V, and 11.9 kA at 690 V. Full 400 A rating holds up to 50 °C ambient. Above that it derates linearly: 392 A at 55 °C, 384 A at 60 °C, 376 A at 65 °C, and 367 A at 70 °C. ## Auxiliary switching and accessories That's enough for remote status indication — one NO/NC for the breaker position, another for the trip signal. The basic switch designation is 3VA13404GF420AA0 if you need to order the bare breaker without auxiliaries.","metaTitle":"SENTRON 3VA1340-4GF42-0AH0 MCCB, 400 A, 121 kA at 240 V","metaDescription":"Siemens SENTRON 3VA1340-4GF42-0AH0 molded case circuit breaker, 400 A, 4-pole, line protection with TM240 release. 121 kA at 240 V. Current lifecycle. 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":"110 mm","Width":"184 mm","Height":"248 mm","Maximum":"400 A","Minimum":"400 A","at 240 V":"121 kA","at 415 V":"75.6 kA","at 440 V":"75.6 kA","at 500 V":"52.5 kA","at 690 V":"11.9 kA","at 40 °C":"400 A","at 45 °C":"400 A","at 50 °C":"400 A","at 55 °C":"392 A","at 60 °C":"384 A","at 65 °C":"376 A","at 70 °C":"367 A","Depth [In]":"4.33 in","Width [In]":"7.24 in","Height [In]":"9.76 in","Trip Indicator":"Yes","Number Of Poles":"4","Voltage Trigger":"No","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":"92.1 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Of The Supplied Basic Switch":"3VA13404GF420AA0","Design Of The Auxiliary Switch":"2 auxiliary switches + 1 trip alarm switch HQ","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%","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":"3","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB12","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":"https://cdn.aoctrl.com/f59d8c360c846d5ff9ef773daebb7908.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1398814&mlfb=3VA1340-4GF42-0AH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1340-4GF42-0AH0/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1340-4GF42-0AH0","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/3VA1340-4GF42-0AH0 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}}