{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA9214-0RL20","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA9214-0RL20","canonicalUrl":"https://aoctrl.com/siemens/3VA9214-0RL20","factsUrl":"https://aoctrl.com/api/mcp/products/3VA9214-0RL20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA9214-0RL20 RCD520 Basic RCD type A, load side mounted, 4-pole, In=250A, adjustable residual current 0.03...5A, adjustable time delay 0...3000ms, IP40 front.","salesMarkdown":"The Siemens 3VA9214-0RL20 is a SENTRON RCD520 Basic residual current device (RCD) type A, designed as a load-side mounted accessory for the 3VA1 molded case circuit breaker family. It provides ground-fault protection for downstream circuits, with a rated operational current of 250 A at AC and a rated frequency of 60 Hz. The 250 A rating means this RCD is sized for the main feeder or large sub-feed in a distribution panel, not for branch circuits. It handles the full load current of a 250 A MCCB while adding adjustable residual current sensing. ## Adjustable trip parameters — what they mean for coordination The response value of the residual current is selectable from a set of fixed values: 0.03, 0.05, 0.1, 0.3, 0.5, 1, 3, and 5 A. The 0.03 A setting provides personnel protection; the higher settings up to 5 A allow selective coordination with downstream RCDs or equipment leakage. The set values of the limit value of non-tripping time are adjustable from 0 to 3.0 seconds in steps (0, 0.06, 0.15, 0.3, 0.5, 1.0, 2.0, 3.0 s). A delay of zero means instantaneous tripping; the longer delays permit selectivity with downstream devices by letting transient inrush or leakage pass without nuisance tripping. A pre-alarm indication at 30% of the set residual current value is integrated, giving early warning before the device trips. This is useful for planned maintenance rather than unplanned downtime. The RCD520 mounts to the load side of a 3VA1 MCCB via busbar connection — it is not a standalone DIN-rail device. The infeed can be from the top or bottom, which simplifies panel layout when busbar routing requires flexibility. Dimensions are 140 mm width, 115 mm height, and 70 mm depth. The 140 mm width matches the 3VA1 four-pole MCCB footprint, so the assembly occupies the same panel space as the breaker alone. Screw fixing secures the module to the breaker. The module is sealable, which is required for installations where tamper-proofing the trip settings is mandated.","metaTitle":"Siemens 3VA9214-0RL20 SENTRON RCD520, 250A 4-Pole RCD Type A","metaDescription":"Siemens 3VA9214-0RL20 SENTRON RCD520 residual current device. 250A rated, 4-pole, Type A, adjustable 0.03-5A. Active production, available to order. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Breaker Accessories"],"specifications":{"Depth":"70 mm","Width":"140 mm","title":"3VA9214-0RL20","Height":"115 mm","Maximum":"80 °C","Minimum":"-40 °C","description":"residual current device RCD520 Basic RCD type A load side mounted rated resid. current 0.03...5A at 50/60Hz adjustable tv 0...3000ms 4-pole In=250A Ue=100-480V accessory for: 3VA1","Number Of Poles":"4","lifecycle_stage":"current","Fastening Method":"screw fixing","Product Brand Name":"SENTRON","Product Designation":"Accessories","Design Of The Product":"Residual current protection module type A","power loss [W] / maximum":"21 W","Product Feature / Sealable":"Yes","protection class IP / on the front":"IP40","Type Of Trip Indicator / Electrical":"Yes","Type Of Trip Indicator / Communication":"No","Response Value / Of The Residual Current":"0.03;0.05;0.1;0.3;0.5;1;3;5","operational current / at AC / rated value":"250 A","Operating Frequency / Rated Value / Maximum":"60 Hz","Product Function / Remote-Controlled Tripping":"No","position / of the infeed / on the RCD component":"Top or bottom","Product Function / Integrated / Alarm Management":"Pre-alarm indication 30%","Set Values / Of The Limit Value Of Not Tripping Time":"0;0.06;0.15;0.3;0.5;1.0;2.0;3.0","product function / selectable RCD or monitoring mode":"No","Product Function / Selectable Tripping Characteristic":"No","Type Of Electrical Connection / For Main Current Circuit":"busbar connection","Product Function / Communication With Residual Current Equipment":"No"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/8cb3cb3193b8a1f48b1883b0224ad266.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=385132&mlfb=3VA9214-0RL20"},"ai":{"faq":[{"question":"What is the 3VA9214-0RL20 used for?","answer":"It is a residual current device (RCD type A) accessory for the Siemens 3VA1 molded case circuit breaker. It provides adjustable ground-fault protection on the load side of the breaker, with a rated current of 250 A and selectable trip thresholds from 0.03 A to 5 A."},{"question":"What are the key adjustable parameters on this RCD?","answer":"The residual current trip threshold is adjustable among eight values from 0.03 A to 5 A, and the non-tripping time delay is adjustable from 0 to 3.0 seconds in eight steps. A pre-alarm triggers at 30% of the set value."},{"question":"Does this RCD mount on a DIN rail?","answer":"No, it mounts via busbar connection to the load side of a 3VA1 MCCB using screw fixing. It is not a standalone DIN-rail device."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA9214-0RL20","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/3VA9214-0RL20 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}}