{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA9114-0RL21","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA9114-0RL21","canonicalUrl":"https://aoctrl.com/siemens/3VA9114-0RL21","factsUrl":"https://aoctrl.com/api/mcp/products/3VA9114-0RL21","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON RCD520B Basic residual current protection module, type B/B+, load-side mounted, 4-pole, In=160 A, adjustable 0.03…5 A, tv 0…10,000 ms, accessory for 3VA1.","salesMarkdown":"The Siemens SENTRON 3VA9114-0RL21 is a residual current protection module (RCD520B Basic) designed for load-side mounting on 3VA1 molded-case circuit breakers. It provides adjustable type B and B+ earth-leakage protection — the type B rating means it catches smooth DC fault currents from variable-speed drives, UPS systems, or PV inverters, not just AC and pulsed DC. That makes it the right module for mixed-load panels where VFDs share a bus with standard AC loads. Rated at 160 A continuous (4-pole), with a residual current trip threshold adjustable from 0.03 A up to 5 A and a time delay settable from 0 to 10,000 ms. The adjustability lets you coordinate selectivity downstream — set a longer delay on the main RCD so a feeder RCD clears first, keeping the rest of the panel live. Mounts via screw fixing and connects to the main circuit through a busbar connection. Infeed can enter from the top or bottom, which simplifies busbar routing in a crowded enclosure. The 160 A rated operational current at AC matches the frame size of the 3VA1 breaker it attaches to — you don't oversize the RCD relative to the breaker, and the busbar connection keeps voltage drop across the module low. The 7.6 W maximum power loss is heat that must be considered in the enclosure's thermal budget; in a sealed panel with multiple modules, that adds up. The adjustable residual current response values — 0.03, 0.05, 0.1, 0.3, 0.5, 1, 3, 5 A — cover everything from personnel protection (30 mA) through equipment protection and fire-prevention levels. The type B+ characteristic extends the detection to smooth DC up to the rated level, which a standard AC/type A RCD would miss. For a panel feeding both VFD-driven conveyors and resistive heaters, this single module handles both leakage profiles. The pre-alarm indication at 30% of the set residual current gives an early warning before the RCD trips — useful in continuous-process lines where an unexpected shutdown costs production time. The selectable RCD or monitoring mode and selectable tripping characteristic add flexibility: you can configure it as a pure monitor (alarm only, no trip) during commissioning or for critical loads. The storage range is wider, but the operating limit is what governs the panel ambient — if the enclosure sees sustained temperatures above 80 °C, derating or forced cooling is needed.","metaTitle":"Siemens 3VA9114-0RL21 SENTRON RCD module, type B/B+, 4-pole,","metaDescription":"Siemens SENTRON 3VA9114-0RL21 residual current protection module, type B/B+, 4-pole, 160 A, adjustable 0.03-5 A, 0-10 s delay. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Breaker Accessories"],"specifications":{"Depth":"70 mm","Width":"101.6 mm","Height":"100 mm","Maximum":"80 °C","Minimum":"-40 °C","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 B and B+","power loss [W] / maximum":"7.6 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":"160 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;5.0;10.0","product function / selectable RCD or monitoring mode":"Yes","Product Function / Selectable Tripping Characteristic":"Yes","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,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1115361&mlfb=3VA9114-0RL21","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA9114-0RL21/alternatives.json"},"ai":{"faq":[{"question":"What is the 3VA9114-0RL21 used for?","answer":"It is a residual current protection module (type B/B+) for load-side mounting on 3VA1 molded-case circuit breakers. It provides adjustable earth-leakage protection up to 160 A, with detection of AC, pulsed DC, and smooth DC fault currents — suitable for panels with VFDs, UPS systems, or PV inverters."},{"question":"What are the key adjustable parameters on this RCD module?","answer":"The residual current trip threshold is adjustable from 0.03 A to 5 A across eight steps, and the time delay is settable from 0 to 10,000 ms in ten steps. The module also offers selectable RCD or monitoring mode and a selectable tripping characteristic."},{"question":"Where can I buy the 3VA9114-0RL21 and get current pricing?","answer":"The module 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 quantity and required delivery window."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA9114-0RL21","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/3VA9114-0RL21 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}}