{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2340-5JQ42-0CH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2340-5JQ42-0CH0","canonicalUrl":"https://aoctrl.com/siemens/3VA2340-5JQ42-0CH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5JQ42-0CH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2340-5JQ42-0CH0, molded case circuit breaker, 4-pole, 400 A frame, adjustable 600–4000 A trip, 187 kA at 240 VAC, line protection design with communication function and undervoltage release.","salesMarkdown":"## What this 4-pole 400 A MCCB carries Its interrupting capacity reaches 187 kA at 240 VAC, 121 kA at 415/440 VAC, 75.6 kA at 500 VAC, and 7.5 kA at 690 VAC — so at typical 400 V class industrial voltages it clears faults well above the 50–65 kA most service-entrance breakers are rated for, meaning it can be used as a main or large feeder breaker without cascading concerns. The thermal-magnetic trip unit is adjustable from 600 A minimum to 4000 A maximum, with a factory-default full-scale value of 400 A. That wide adjustment range lets one frame size cover multiple load banks — set it at 600 A for a 250 kW motor feeder or dial it up to 4000 A for a transformer secondary or bus riser. Above 50 °C it derates linearly: 375 A at 55 °C, 350 A at 60 °C, 325 A at 65 °C, and 300 A at 70 °C. The breaker dissipates 98.5 W maximum at rated load, so ventilation or spacing in the enclosure matters. Physical footprint is 248 mm high, 184 mm wide, 110 mm deep — a 4-pole frame that fits standard SENTRON mounting plates and busbar systems. The depth is shallow enough for 300 mm deep enclosures with wiring gutters. ## Built-in accessories and communication The UVR drops the breaker if control voltage falls below its dropout threshold — standard practice for emergency-stop circuits and undervoltage protection on motor feeders. Communication function is onboard, so it can integrate with a BMS or SCADA system for remote trip indication and load monitoring. The basic switch version is 3VA2340-5JQ42-0AA0 — this -0CH0 suffix adds the UVR and the HQ auxiliary switch complement. If your BOM already specifies the -0AA0 and you need undervoltage protection, this is the drop-in upgrade without changing mounting or bus connections.","metaTitle":"Siemens 3VA2340-5JQ42-0CH0 SENTRON MCCB, 400 A, 4-Pole, 187","metaDescription":"Siemens SENTRON 3VA2340-5JQ42-0CH0 molded case circuit breaker, 400 A frame, 4-pole, 187 kA interrupting at 240 VAC. Active production. Quoted 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","title":"3VA2340-5JQ42-0CH0","Height":"248 mm","Maximum":"4 000 A","Minimum":"600 A","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"121 kA","at 500 V":"75.6 kA","at 690 V":"7.5 kA","at 40 °C":"400 A","at 45 °C":"400 A","at 50 °C":"400 A","at 55 °C":"375 A","at 60 °C":"350 A","at 65 °C":"325 A","at 70 °C":"300 A","Depth [In]":"4.33 in","Width [In]":"7.24 in","Height [In]":"9.76 in","description":"circuit breaker 3VA2 IEC frame 400 breaking capacity class M Icu=55kA @ 415V 4-pole, line protection ETU560, LSIG, In=400A overload protection Ir=160A...400A short-circuit protection Isd=0.6...10 x In, Ii=1.5 x In N conductor protection adjustable (OFF, up to 100%) gr.-fault prot., can be sw. off Ig=0.2...1 x In= tg=0.05-0.8s nut keeper kit undervoltage release (UVR) 120-127V AC 50/60Hz 2 auxiliary switches HQ 1 trip alarm switch HQ","Initial Value":"80 A","Trip Indicator":"Yes","Number Of Poles":"4","Voltage Trigger":"No","lifecycle_stage":"current","Full-Scale Value":"400 A","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"Yes","Design Of The Product":"Line protection","Communication Function":"Yes","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"98.5 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Of The Supplied Basic Switch":"3VA2340-5JQ42-0AA0","Design Of The Auxiliary Switch":"2 auxiliary switches + 1 trip alarm switch HQ","Design Of The Auxiliary Release":"undervoltage release (UVR)","Ground-Fault Monitoring Version":"Summation current formation L + N conductor","Continuous Current / Rated Value":"400 A","Insulation Voltage / Rated Value":"800 V","Design Of The Overcurrent Release":"ETU560","protection class IP / on the front":"IP40","design of the N-conductor protection":"adjustable OFF; 20% to 100%","Of The Integrated Auxiliary Trip Unit":"3VA9608-0BB24","Product Function / Grounding Protection":"Yes","operating voltage / at AC / rated value":"690 V","reference code / according to IEC 81346-2":"Q","Continuous Current / Rated Value / Maximum":"400 A","Product Extension / Optional / Motor Drive":"Yes","Protection Function Of The Overcurrent Release":"LSIG","number of CO contacts / for auxiliary contacts":"3","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB12","Switching Capacity Class Of The Circuit Breaker":"M","Mechanical Service Life (Operating Cycles) / Typical":"20 000","Type Of Electrical Connection / For Main Current Circuit":"on both sides nut keeper kit","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front terminal"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/c1b3b6c5f6d67465025ac41848ceb75e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=473924&mlfb=3VA2340-5JQ42-0CH0"},"ai":{"faq":[{"question":"What is the interrupting capacity of 3VA2340-5JQ42-0CH0 at 415 V?","answer":"The interrupting capacity is 121 kA at 415 VAC, which is the same rating as at 440 VAC. At 240 VAC it reaches 187 kA, and at 690 VAC it is 7.5 kA."},{"question":"Where can I buy 3VA2340-5JQ42-0CH0 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for your volume and delivery schedule."},{"question":"Will 3VA2340-5JQ42-0CH0 drop into a panel specified around 3VA2225-5JQ32-0AK0?","answer":"The 3VA2340 is on a larger 400 A frame (248 x 184 x 110 mm) versus the 3VA2225's 250 A frame, so mounting hole patterns and busbar spacing differ. It will not be a direct mechanical swap without re-drilling or adapting the mounting plate."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2340-5JQ42-0CH0","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/3VA2340-5JQ42-0CH0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}