{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA1125-1JL16-4BB4","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA1125-1JL16-4BB4","canonicalUrl":"https://aoctrl.com/siemens/3RA1125-1JL16-4BB4","factsUrl":"https://aoctrl.com/api/mcp/products/3RA1125-1JL16-4BB4","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS non-fused load feeder, size S0, direct starter, 4 kW at 400 V, 24 VDC coil, snap-on mounting, IP20 front.","salesMarkdown":"## What this SIRIUS load feeder is The Siemens 3RA1125-1JL16-4BB4 is a SIRIUS non-fused load feeder in size S0, configured as a direct starter with bimetal motor protection and a circuit-breaker for short-circuit protection. It ships as a pre-assembled unit containing a 3RT1016-1BB41 contactor, a 3RV1021-1JA15 circuit-breaker, and a 3RA1921-1BA00 link module — one order code, one assembly, one BOM line. Snap-on mounting onto a DIN rail, with a vertical mounting surface that can be rotated ±90° or tilted ±22.5° front-to-back. Dimensions are 45 mm wide, 205 mm high, and 154 mm deep — the S0 footprint common across the SIRIUS feeder range, so it fits existing panel layouts without re-drilling. Clearance requirements: 30 mm upward, 10 mm forward, 9 mm backward, 0 mm downward, and 30 mm at the side (0 mm when side-by-side mounted). IP20 on the front — protected against finger contact, suitable for enclosed panel installation where the front face is the only accessible surface. ## Environmental and electrical ratings Shock resistance of 12.5g and pollution degree 3 mean it withstands the vibration and conductive-dust conditions typical of machine-mounted panels. Rated insulation voltage 690 V, surge voltage resistance 6 kV — coordination class for standard 400 V line supplies with adequate overvoltage protection upstream. The electromechanical switching contact design supports a no-load switching frequency of 15 operations per second, though the motor-start duty cycle will be lower.","metaTitle":"Siemens 3RA1125-1JL16-4BB4 SIRIUS Load Feeder, 4 kW at 400 V","metaDescription":"Siemens 3RA1125-1JL16-4BB4 SIRIUS non-fused load feeder, 4 kW at 400 V, 24 VDC coil, snap-on mounting. Active lifecycle. Sourced to order against an RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Starters"],"specifications":{"Depth":"154 mm","Width":"45 mm","Height":"205 mm","Upwards":"30 mm","Forwards":"10 mm","Backwards":"9 mm","Downwards":"0 mm","At The Side":"30 mm","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-20 ... +70 °C","Fastening Method":"snap-on mounting","Shock Resistance":"12.5g","Mounting Position":"with vertical mounting surface +/-90° rotatable, with vertical mounting surface +/- 22.5° tiltable to the front and back","PROFINET protocol":"No","at DC rated value":"24 V","Product Brand Name":"SIRIUS","Type Of Assignment":"1","Degree Of Pollution":"3","Product Designation":"non-fused load feeder","Size Of Load Feeder":"S0","PROFIBUS DP protocol":"No","at 400 V rated value":"4 kW","Design Of The Product":"direct starter","Number Of Digital Inputs":"0","Of The Supplied Contactor":"3RT1016-1BB41","NO-Load Switching Frequency":"15 1/s","Of The Supplied Link Module":"3RA1921-1BA00","Type Of The Motor Protection":"bimetal","Substance Prohibitance (Date)":"05/01/2012","Insulation Voltage Rated Value":"690 V","Design Of The Switching Contact":"electromechanical","Of The Supplied Circuit-Breakers":"3RV1021-1JA15","protection class IP on the front":"IP20","Design Of Short-Circuit Protection":"circuit-breakers","Product Extension Auxiliary Switch":"Yes","Product Function Bus Communication":"No","Surge Voltage Resistance Rated Value":"6 kV","With Side-By-Side Mounting At The Side":"0 mm","reference code according to IEC 81346-2":"Q","Number Of Poles For Main Current Circuit":"3","Product Function Short Circuit Protection":"Yes","protocol is supported AS-Interface protocol":"No","number of CO contacts for auxiliary contacts":"0","number of NC contacts for auxiliary contacts":"1","number of NO contacts for auxiliary contacts":"1","Type Of Voltage Of The Control Supply Voltage":"DC","operating voltage at AC-3 rated value maximum":"400 V","Of The Supplied Standard Mounting Rail Adapter":"3RA1922-1L","operational current at AC-3 at 400 V rated value":"8.5 A","Type Of Electrical Connection For Main Current Circuit":"screw-type terminals","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Mechanical Service Life (Switching Cycles) Of Contactor Typical":"10 000 000","breaking capacity maximum short-circuit current (Icu) at 400 V rated value":"50 kA","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"7 ... 10 A"}},"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=207387&mlfb=3RA1125-1JL16-4BB4","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RA1125-1JL16-4BB4/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RA1125-1JL16-4BB4?","answer":"This part is sourced to order against an RFQ through independent distribution. Submit a request for current pricing and availability."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA1125-1JL16-4BB4","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/3RA1125-1JL16-4BB4 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}}