{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2125-5HK46-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2125-5HK46-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2125-5HK46-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2125-5HK46-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2125-5HK46-0AA0, molded case circuit breaker, 4-pole, 25 A, ETU340 electronic trip unit, 187 kA at 240 V, 121 kA at 415 V, IP40 front.","salesMarkdown":"## What this MCCB delivers The Siemens SENTRON 3VA2125-5HK46-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for 25 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. It carries an ETU340 electronic trip unit, which gives you adjustable long-time, short-time, instantaneous, and ground-fault protection curves. The interrupting ratings are substantial: 187 kA at 240 V AC, 121 kA at 415 V and 440 V, 76 kA at 500 V, and 17 kA at 690 V. That puts it in the high-interrupting-capacity class for industrial distribution panels where fault currents can be severe. The ETU340 release lets you coordinate selectively with downstream breakers: you can set the short-time pickup and delay so a feeder fault clears before this main trips, keeping the rest of the bus live. It's designed for panel mounting with screw connections — no DIN-rail clip on this frame size. The 4-pole configuration covers three-phase plus neutral, with the neutral protection adjustable to OFF or 100% of the phase setting.","metaTitle":"Siemens 3VA2125-5HK46-0AA0 SENTRON MCCB, 25 A, 4-Pole, ETU34","metaDescription":"Siemens SENTRON 3VA2125-5HK46-0AA0 molded case circuit breaker, 25 A continuous, 4-pole, ETU340 release. 187 kA at 240 V, 121 kA at 415 V. Current production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"86 mm","Width":"140 mm","title":"3VA2125-5HK46-0AA0","Height":"181 mm","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"121 kA","at 500 V":"76 kA","at 690 V":"17 kA","at 40 °C":"25 A","at 45 °C":"25 A","at 50 °C":"25 A","at 55 °C":"25 A","at 60 °C":"25 A","at 65 °C":"25 A","at 70 °C":"25 A","Depth [in]":"3.4 in","Width [in]":"5.5 in","Height [in]":"7.1 in","description":"circuit breaker 3VA2 IEC frame 160 breaking capacity class M Icu=55kA @ 415V 4-pole, line protection ETU340, ELISA LI, In=25A overload protection Ir=10A...25A short-circuit protection Ii=15 x In N conductor protection adjustable (OFF, 100%) clamp connection","Number of poles":"4","Product version":"Line protection","lifecycle_stage":"current","Product brand name":"SENTRON","Product designation":"Molded case circuit breaker","Latching - endurance":"20 000","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Power loss [W] / maximum":"0.6 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-40 °C","Other Measurement Function":"No","Rated continuous current Iu":"25 A","Rated insulation voltage Ui":"800 V","Ground fault monitoring version":"Without","Design of the overcurrent release":"ETU340","Protection class IP / on the front":"IP40","Design of the N-conductor protection":"adjustable OFF; 100%","Reference code / acc. to DIN EN 81346-2":"Q","Adjustable response value time / tr max.":"1300","Adjustable response value time / tr min.":"1300","Product extension / optional / motor drive":"Yes","Adjustable response value current / Ir max.":"25 A","Adjustable response value current / li max.":"375 A","Adjustable response value current / li min.":"375 A","Adjustable response value current / lr min.":"10 A","Neutral conductors / upgradeable/retrofittable":"No","Number of CO contacts / for auxiliary contacts":"0","Protective function of the overcurrent release":"ELISA LI","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 (6-120 mm²)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/641a6843e8dc2f758bb6426196efa871.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=113248&mlfb=3VA2125-5HK46-0AA0"},"ai":{"faq":[{"question":"What is the interrupting rating of 3VA2125-5HK46-0AA0 at 415 V?","answer":"121 kA at 415 V AC, and the same 121 kA at 440 V. At 240 V it's 187 kA, at 500 V it's 76 kA, and at 690 V it's 17 kA."},{"question":"What trip unit does this MCCB use?","answer":"It uses the ETU340 electronic trip unit, which provides adjustable long-time, short-time, instantaneous, and ground-fault protection curves."},{"question":"Where can I buy 3VA2125-5HK46-0AA0 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent industrial-automation distribution. Availability and current pricing are confirmed at quote time — no online stock or price is listed here."},{"question":"Will 3VA2125-5HK46-0AA0 drop into a panel specified for 3VA2125-8KQ42-0AA0?","answer":"Both are 4-pole 25 A SENTRON 3VA frame-size breakers, so the mounting footprint and bus-bar spacing are the same. The difference is in the trip unit and accessories — the 5HK46 variant carries the ETU340 release, while the 8KQ42 variant uses a different release. Verify the trip curve and auxiliary contact configuration against your coordination study before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2125-5HK46-0AA0","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/3VA2125-5HK46-0AA0 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}}