{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EP3703-8DS00","brand":"Siemens","brandSlug":"siemens","productSlug":"4EP3703-8DS00","canonicalUrl":"https://aoctrl.com/siemens/4EP3703-8DS00","factsUrl":"https://aoctrl.com/api/mcp/products/4EP3703-8DS00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 4EP3703-8DS00 Netzdrossel mains choke, 400V AC, 50Hz, 26.6A, 1.2mH, IP00, Class B, screw/tab terminals.","salesMarkdown":"## What this mains choke does on a 400V line The Siemens 4EP3703-8DS00 is a three-phase Netzdrossel — a mains choke — rated for 400V AC at 50Hz. It carries 26.6A maximum current (24A rated operational current) with a 1.2mH inductance and a 4% relative inductive voltage drop at rated conditions. That voltage drop figure tells you the choke is sized to smooth line-side harmonics and limit inrush current without dragging the bus voltage down more than 4% under full load. The 30W coil loss plus 12W iron core loss (42W total) is what the panel ventilation needs to shed at 50°C ambient. IP00 means it's an open-frame component — no enclosure, no gasket. It mounts inside a cabinet that provides the environmental seal. The screw-type and tab terminals on the main circuit suit panel wiring with ring lugs or fork terminals; plan for a 0.105m depth, 0.178m width, and 0.153m height footprint on the mounting plate. This part carries a mature lifecycle stage — it's an established catalog item, not newly introduced and not flagged for phase-out. ## Thermal class and compliance Insulation is Class B per IEC 60085, which means a 130°C continuous temperature limit on the winding. The choke is designed to EN 61558-2-20, the safety standard for small transformers and chokes. That standard covers dielectric strength, creepage distances, and overload behavior — relevant for panel builders who need to document the component's safety file.","metaTitle":"Siemens 4EP3703-8DS00 Mains Choke, 400V 50Hz 26.6A 1.2mH","metaDescription":"Siemens 4EP3703-8DS00 Netzdrossel mains choke, 400V AC, 50Hz, 26.6A rated current, 1.2mH inductance, IP00, Class B insulation. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Line/Load Reactors"],"specifications":{"Depth":"0.105m","Width":"0.178m","Height":"0.153m","Phase Number":"3","Type Of Voltage":"AC","lifecycle_stage":"mature","Product Designation":"Netzdrossel","protection class IP":"IP00","current at AC maximum":"26.6A","Inductivity Rated Value":"0.0012H","power loss [W] of the coil":"30W","Operating Voltage Rated Value":"400V","Ambient Temperature Rated Value":"50°C","Operating Frequency Rated Value":"50Hz","power loss [W] of the iron core":"12W","thermal class according to IEC 60085":"B","operational current at AC rated value":"24A","Type Of Electrical Connection For Main Current Circuit":"screw-type terminals / tab terminals","Relative Inductive Drop In Voltage For Rated Value Of The Current, Voltage And Frequency":"4%"}},"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=32171&mlfb=4EP3703-8DS00","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EP3703-8DS00/alternatives.json"},"ai":{"faq":[{"question":"What is 4EP3703-8DS00 used for?","answer":"It's a three-phase mains choke (Netzdrossel) for 400V AC, 50Hz lines, rated 26.6A with 1.2mH inductance. It smooths line harmonics, limits inrush current, and provides a 4% inductive voltage drop at rated load — typical for drive input filtering or line-side impedance in industrial panels."},{"question":"Where can I buy 4EP3703-8DS00?","answer":"This part is quoted to order against an RFQ through independent industrial-automation distribution. Availability and current pricing are confirmed at quote time — no stock figures or lead-time numbers are published here."},{"question":"What are the mounting dimensions for 4EP3703-8DS00?","answer":"The choke measures 0.178m wide, 0.105m deep, and 0.153m high. It's an open-frame IP00 component designed for cabinet mounting with screw-type or tab terminals."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EP3703-8DS00","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/4EP3703-8DS00 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}}