{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1112-5EF32-0CH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1112-5EF32-0CH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1112-5EF32-0CH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1112-5EF32-0CH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1112-5EF32-0CH0, molded case circuit breaker, 3-pole, 125 A at 50 °C, 187 kA interrupting at 240 V, undervoltage release, 2 aux switches + trip alarm.","salesMarkdown":"## MCCB for line protection with high interrupting capacity The Siemens SENTRON 3VA1112-5EF32-0CH0 is a 3-pole molded case circuit breaker (MCCB) designed for line protection in distribution panels. It carries 125 A continuously up to 50 °C, then derates to 114 A at 70 °C — the full thermal curve is on the nameplate so you can size for the actual cabinet ambient, not just the theoretical maximum. The interrupting ratings are the headline figure here: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 500 V and 690 V. That 187 kA at 240 V means it can safely clear a fault at the service entrance where available fault current is highest — typical for large industrial switchboards or transformer secondaries. The 70 mm depth and 76.2 mm width fit standard SENTRON panel cutouts, so a swap-in replacement for an existing 3VA frame won't require re-drilling the mounting plate. ## Built-in undervoltage release and auxiliary switching This MCCB ships with an undervoltage release (UVR) fitted as the auxiliary release, so it will trip automatically if the control voltage drops below the dropout threshold — common in safety circuits where a loss of control power must open the main breaker. The auxiliary switch block provides 2 auxiliary switches plus 1 trip alarm switch HQ, giving three separate signal paths for status feedback to a PLC or indication lamp. A trip indicator is present on the front face, so a walk-by inspection shows whether the breaker tripped on fault versus being manually opened. The rated insulation voltage is 800 V, which covers 690 V systems with margin. No ground-fault monitoring or communication function is built in — this is a straight line-protection breaker with mechanical auxiliaries, not a smart metering device.","metaTitle":"Siemens 3VA1112-5EF32-0CH0 MCCB, 125 A, 3-Pole, 187 kA at 24","metaDescription":"Siemens SENTRON 3VA1112-5EF32-0CH0 molded case circuit breaker, 125 A continuous, 3-pole, 187 kA interrupting at 240 V. Active 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":"70 mm","Width":"76.2 mm","Height":"130 mm","Maximum":"0 A","Minimum":"0 A","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"75.6 kA","at 500 V":"17 kA","at 690 V":"17 kA","at 40 °C":"125 A","at 45 °C":"125 A","at 50 °C":"125 A","at 55 °C":"122 A","at 60 °C":"120 A","at 65 °C":"117 A","at 70 °C":"114 A","Depth [In]":"2.76 in","Width [In]":"3 in","Height [In]":"5.12 in","Trip Indicator":"Yes","Number Of Poles":"3","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"Yes","Design Of The Product":"Line protection","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"30.6 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Of The Supplied Basic Switch":"3VA11125EF320AA0","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":"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","Of The Integrated Auxiliary Trip Unit":"3VA9608-0BB24","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"690 V","operating voltage / at DC / rated value":"500 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":"M","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":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=13155&mlfb=3VA1112-5EF32-0CH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1112-5EF32-0CH0/alternatives.json"},"ai":{"faq":[{"question":"Does 3VA1112-5EF32-0CH0 include an undervoltage release?","answer":"Yes, it is fitted with an undervoltage release (UVR) as the auxiliary release."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1112-5EF32-0CH0","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/3VA1112-5EF32-0CH0 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}}