{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK4340-3NR51-1BA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK4340-3NR51-1BA0","canonicalUrl":"https://aoctrl.com/siemens/3RK4340-3NR51-1BA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RK4340-3NR51-1BA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS motor starter MCU, I/O controlled, reversing design, rated 10 A at 400 V AC-3, Trip Class 10, IP55, 340–440 V operating voltage.","salesMarkdown":"## What this reversing starter nails for the cure recipe The bimetal design is electromechanical, not electronic, so it holds up to the steam and vibration of industrial environments without firmware glitches. Rated for a 340–440 V operating voltage at 50/60 Hz. The control supply is 20.4–26.4 V DC. ## Mounting and environment — rated for press temperatures IP55 protection means the enclosure resists dust and water jets — suitable for washdown areas or outdoor cabinets, though not submerged. The ambient temperature range of -25 to +35 °C covers most control rooms and unheated plant floors, but derate above 35 °C if the panel sits near a curing press or oven. This lets you fit it into tight enclosures or angled subpanels without worrying about orientation limits. The short-circuit protection is designed for circuit-breakers, not fuses, so coordinate with a suitable motor-protective circuit-breaker upstream. No PROFIBUS, PROFINET, or AS-Interface onboard — this is a hardwired I/O-controlled unit, not a networked fieldbus device.","metaTitle":"Siemens 3RK4340-3NR51-1BA0 SIRIUS Motor Starter, 10 A","metaDescription":"Siemens SIRIUS 3RK4340-3NR51-1BA0 motor starter, reversing design, 10 A at 400 V AC-3, Trip Class 10, IP55. Active production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Starters"],"specifications":{"Depth":"145 mm","Width":"182 mm","title":"3RK4340-3NR51-1BA0","Height":"220 mm","Trip Class":"CLASS 10","description":"SIRIUS MCU motor starter Enclosure degree of protection IP55 plastic Communication without electromechanically switching Short-circuit protection with circuit breaker Reversing starter Brake without Performance class 10.00 A Motor circuit breaker with bi-metal thermal Manual operation without Connection power M screw connection Standard product","Type Of Voltage":"DC","lifecycle_stage":"current","Bus Communication":"No","Mounting Position":"+/-180° rotation possible on vertical mounting surface; can be tilted forward and backward by +/- 22.5° on vertical mounting surface","PROFINET protocol":"No","Product Brand Name":"SIRIUS","Type Of Assignment":"1","Product Designation":"motor starter MCU, I/O controlled","protection class IP":"IP55","PROFIBUS DP protocol":"No","Design Of The Product":"reversing starter","Number Of Digital Inputs":"0","Short Circuit Protection":"Yes","at AC at 400 V rated value":"10 A","brake control with 24 V DC":"No","Operating Frequency Minimum":"80 1/h","brake control with 180 V DC":"No","brake control with 400 V AC":"No","brake control with 500 V DC":"No","Type Of The Motor Protection":"bimetal","at AC-3 at 400 V rated value":"10 A","Operating Voltage Rated Value":"340 ... 440 V","Substance Prohibitance (Date)":"05/01/2012","Design Of The Switching Contact":"electromechanical","Operating Frequency 1 Rated Value":"50 Hz","Operating Frequency 2 Rated Value":"60 Hz","Design Of Short-Circuit Protection":"circuit-breakers","Ambient Temperature During Operation":"-25 ... +35 °C","Product Component Motor Brake Output":"No","Type Of Voltage Of The Supply Voltage":"DC","reference code according to IEC 81346-2":"Q","Number Of Poles For Main Current Circuit":"3","control supply voltage at DC rated value":"20.4 ... 26.4 V","with low demand rate according to SN 31920":"50 %","protocol is supported AS-Interface protocol":"No","with high demand rate according to SN 31920":"75 %","operating power at AC-3 at 400 V rated value":"4 kW","Product Extension Braking Module For Brake Control":"No","Relative Negative Tolerance Of The Operating Frequency":"-10 %","Relative Positive Tolerance Of The Operating Frequency":"10 %","Type Of Electrical Connection For Main Current Circuit":"screw-type terminals","breaking capacity maximum short-circuit current (Icu) at 400 V rated value":"50 000 A","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"7 ... 10 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/0fac05546e42fd0b77792dfdbd3bf1aa.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=247079&mlfb=3RK4340-3NR51-1BA0"},"ai":{"faq":[{"question":"Where can I buy 3RK4340-3NR51-1BA0?","answer":"This part is sourced to order against your RFQ. Availability and pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK4340-3NR51-1BA0","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/3RK4340-3NR51-1BA0 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}}