{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SV8703-2KK","brand":"Siemens","brandSlug":"siemens","productSlug":"5SV8703-2KK","canonicalUrl":"https://aoctrl.com/siemens/5SV8703-2KK","factsUrl":"https://aoctrl.com/api/mcp/products/5SV8703-2KK","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SV8703-2KK summation current transformer, Type B, 120 mm internal diameter, 330 A rated operational current, 100 mA minimum residual current, for AC and DC systems.","salesMarkdown":"## Summation current transformer for mixed AC/DC residual current detection The Siemens 5SV8703-2KK is a SENTRON summation current transformer designed for Type B residual current monitoring — meaning it detects smooth DC residual currents as well as AC and pulsed DC, which standard Type A devices miss. Rated for 330 A continuous through the primary window and a 120 mm internal diameter, it fits around main conductors or busbars in distribution panels where mixed-frequency loads (VFDs, UPS, EV chargers) generate DC fault currents. Surge withstand is 8 kV, which keeps the secondary electronics safe during line-side transients. ## Panel integration and wiring constraints Mounting dimensions are 210 mm wide by 191.5 mm deep by 67 mm tall. The plug-in terminal connection accepts up to 6 conductors of 0.75 mm² each, so secondary wiring to the RCD or evaluation unit stays within a single terminal block. Maximum secondary wire length is 10 m — keep that in mind when locating the transformer relative to the trip unit. Operating ambient range is -10 °C to 55 °C with up to 95 % humidity, so it handles unconditioned electrical rooms within that band.","metaTitle":"Siemens 5SV8703-2KK SENTRON Summation CT, Type B, 330 A, 120","metaDescription":"Siemens 5SV8703-2KK SENTRON Type B summation current transformer. 330 A rated, 120 mm ID, 100 mA min residual. Active production, sourced to order. Quoted on request.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"191.5 mm","Width":"210 mm","title":"5SV8703-2KK","Height":"67 mm","Maximum":"55 °C","Minimum":"-10 °C","description":"Summation current transformer type B, 120 mm,100 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":"100 mA","Operational Current Rated Value":"330 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":"120 mm","Type Of Voltage Of The Operating Voltage For Actuation":"AC/DC"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$257.81","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/f325c45044e4b2d211df8be982916992.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=767563&mlfb=5SV8703-2KK"},"ai":{"faq":[{"question":"What is the 5SV8703-2KK used for?","answer":"It is a Type B summation current transformer for residual current monitoring in AC and DC systems. It detects smooth DC residual currents that standard Type A devices cannot see, making it suitable for circuits with VFDs, UPS systems, or EV charging infrastructure."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SV8703-2KK","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/5SV8703-2KK 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}}