{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SV8704-2KK","brand":"Siemens","brandSlug":"siemens","productSlug":"5SV8704-2KK","canonicalUrl":"https://aoctrl.com/siemens/5SV8704-2KK","factsUrl":"https://aoctrl.com/api/mcp/products/5SV8704-2KK","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SV8704-2KK Type B summation current transformer, 630 A rated, 300 mA Idn, 210 mm internal diameter, for AC and DC systems.","salesMarkdown":"It is designed for AC and DC systems, making it suitable for mixed-frequency fault detection including smooth DC and high-frequency components. The 210 mm opening passes large cable bundles or busbars without splitting, and the 630 A rating positions it for main feeder or large subdistribution monitoring in commercial or industrial panels. The 630 A rated operational current is the continuous thermal current the transformer can carry through its primary window — sized for a 630 A busbar or cable assembly, not for a single small conductor. The 300 mA minimum residual current is the lowest earth-leakage signal the core can detect; Type B design means it responds to AC sinusoidal, pulsating DC, smooth DC, and mixed-frequency residual currents up to 1 kHz or more, covering VFD-fed motor circuits and UPS-fed loads that standard Type A transformers miss. The 210 mm internal diameter accepts conductors up to roughly 200 mm bundle diameter — think multiple 300 MCM cables or a 5×50 mm busbar. The 690 V rated voltage at 50/60 Hz and 8 kV surge withstand confirm it fits 400/480 V systems with margin. ## Deployment context The transformer mounts via its own bracket or DIN-rail adapter (not a snap-on DIN footprint — check the mounting kit). At 304.5 mm deep, 323 mm wide, and 80 mm high, it needs a panel depth of at least 320 mm to clear the rear terminals. The plug-in terminal connections accept up to 6 conductors of 0.75 mm² each — fine for the secondary wiring to the RCD or relay, but the primary busbar is what passes through the 210 mm window. IP20 at the terminals means it is for enclosed panel use only, not washdown. The 2.5 VA maximum apparent power consumption tells you the burden the secondary imposes on the monitoring relay — stay under that limit when selecting the connected RCD or relay module. The 5SV8704-2KK carries an Active lifecycle status. It is a current-production Siemens SENTRON catalog item. No official successor is listed — this is the current Type B summation transformer in the 210 mm / 630 A class.","metaTitle":"Siemens 5SV8704-2KK SENTRON Summation Current Transformer, 6","metaDescription":"Siemens SENTRON 5SV8704-2KK Type B summation current transformer, 630 A rated, 300 mA Idn, 210 mm ID, for AC/DC systems. Active, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"304.5 mm","Width":"323 mm","title":"5SV8704-2KK","Height":"80 mm","Maximum":"55 °C","Minimum":"-10 °C","description":"Summation current transformer type B, 210 mm, 300 mA 1A","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"summation current transformer","Suitability For Use":"for AC and DC systems","Wire Length Maximum":"10 m","Design Of The Product":"Type B","according to EN 61346-2":"T","according to IEC 81346-2":"T","Product Function Error Memory":"No","Type Of Electrical Connection":"Plug-in terminal","residual current (Idn) minimum":"300 mA","Operational Current Rated Value":"630 A","Apparent Power Consumption Maximum":"2.5 VA","at AC at 50 Hz rated value maximum":"690 V","at AC at 60 Hz rated value maximum":"690 V","Surge Voltage Resistance Rated Value":"8 kV","Influence Of The Surrounding Temperature":"Max. 95% humidity","Type Of Connectable Conductor Cross-Sections":"6 x 0.75 mm²","symmetrical tolerance of supply voltage at DC":"12 V","protection class IP at connection all terminals":"IP20","Internal Diameter Of Summation Current Transformer":"210 mm","Type Of Voltage Of The Operating Voltage For Actuation":"AC/DC"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/69262e6f883db57d0547d336469a5a58.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=767564&mlfb=5SV8704-2KK"},"ai":{"faq":[{"question":"What is the 5SV8704-2KK used for?","answer":"It is a Type B summation current transformer for AC and DC systems, rated 630 A continuous with a 300 mA minimum residual current threshold and 210 mm internal diameter. It detects AC, pulsating DC, smooth DC, and mixed-frequency residual currents — used in main feeder or large subdistribution monitoring where VFDs, UPS systems, or EV chargers are present."},{"question":"Where can I buy the 5SV8704-2KK?","answer":"Sourced and quoted to order through independent distribution against an RFQ. Availability and current pricing confirmed at quote time — submit an RFQ for your quantity and delivery window."},{"question":"What are the key dimensions of the 5SV8704-2KK?","answer":"Depth 304.5 mm, width 323 mm, height 80 mm, with a 210 mm internal diameter for the primary conductor passage."},{"question":"Will the 5SV8704-2KK work with a VFD-fed motor circuit?","answer":"Yes — the Type B design detects smooth DC and mixed-frequency residual currents up to 1 kHz or more, which standard Type A transformers miss. It is suitable for VFD, UPS, and EV charging applications."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SV8704-2KK","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/5SV8704-2KK 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}}