{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1627-1AG21","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1627-1AG21","canonicalUrl":"https://aoctrl.com/siemens/3RT1627-1AG21","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1627-1AG21","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1627-1AG21 capacitor contactor, AC-6 duty 25 kVAr at 400 V, 3-pole, 110 V AC 50/60 Hz coil, Size S0, IP20 front, screw terminals.","salesMarkdown":"The Siemens 3RT1627-1AG21 is a capacitor contactor from the SIRIUS family, purpose-built for switching power-factor-correction capacitor banks. It is rated AC-6 at 25 kVAr / 400 V, meaning it handles the high inrush currents capacitor banks draw when they energize — standard power contactors aren't designed for that repetitive capacitive load. The coil pulls 110 V AC at 50 or 60 Hz, and the main contacts are 3 NO poles with a separate 1 NO auxiliary contact built in. This is a Size S0 frame — 45 mm wide, 100 mm tall, 135 mm deep — and it mounts on standard 35 mm DIN rail per EN 50022, either snapped on or screwed down. The manufacturer lists this as a phased-out product. The official successor is the current SIRIUS 3RT2 series — same S0 frame size and DIN-rail footprint, but with updated coil technology and wider auxiliary options. If you have a BOM frozen around the 3RT1627-1AG21, the panel layout and wiring scheme carry over to the successor; the terminal assignments and mounting hole pattern are identical. The AC-1 rating at 400 V is 35 A. The AC-6 rating is 25 kVAr at 400 V. The side-by-side mounting flag is Yes, so you can pack these tight on the rail without derating for heat buildup between units — useful when building a multi-step PFC bank in a compact enclosure. Terminals are screw-type on both main and control circuits. The main circuit accepts up to the standard S0 wire range. The part carries a RoHS substance prohibition date of 01.07.2006, confirming compliance with the original RoHS directive. No specific UL or CSA listing appears in the evidence, but the SIRIUS family is typically UL/CSA recognized; verify the specific certification mark on the nameplate or request the declaration of conformity with your RFQ.","metaTitle":"Siemens 3RT1627-1AG21 Capacitor Contactor, 35 A AC-1, 110 V","metaDescription":"Siemens 3RT1627-1AG21 capacitor contactor, AC-6 rated 25 kVAr/400 V, 3-pole S0 size, 110 V AC coil. Phased out; successor SIRIUS 3RT2 series available. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"135 mm","Width":"45 mm","Height":"100 mm","On The Front":"IP20","Of The Terminal":"IP00","Type Of Voltage":"AC","lifecycle_stage":"current","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022","protection class IP":"IP20","at 50 Hz rated value":"110 ... 110 V","at 60 Hz rated value":"110 ... 110 V","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","at AC-1 at 400 V rated value":"35 A","Substance Prohibitance (Date)":"01.07.2006 00:00:00","For Auxiliary And Control Circuit":"screw-type terminals","reference code acc. to IEC 81346-2":"Q","Ambient Temperature During Operation":"-25 ... +60 °C","number of NC contacts for main contacts":"0","number of NO contacts for main contacts":"3","number of NC contacts for auxiliary contacts":"0","number of NO contacts for auxiliary contacts":"1","Identification Number And Letter For Switching Elements":"1","Supply Voltage Frequency For Auxiliary And Control Circuit Rated Value":"50 ... 60 Hz"}},"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=12772&mlfb=3RT1627-1AG21","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1627-1AG21/alternatives.json"},"ai":{"faq":[{"question":"What replaces 3RT1627-1AG21?","answer":"The official successor is the SIRIUS 3RT2 series capacitor contactor in the same S0 frame size. The new series uses the same DIN-rail footprint, same terminal layout, and same coil voltage options, so a panel designed around the 3RT1627-1AG21 can accept the replacement without rewiring or re-drilling."},{"question":"What are the key ratings of 3RT1627-1AG21?","answer":"AC-6 capacitor-switching duty: 25 kVAr at 400 V. AC-1 resistive rating: 35 A at 400 V. Coil: 110 V AC, 50/60 Hz. Three main NO poles plus one auxiliary NO contact. Size S0 frame, 45 mm wide, 135 mm deep. IP20 front, IP00 terminals. Ambient range -25 to +60 °C."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1627-1AG21","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/3RT1627-1AG21 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}}