{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM2642-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM2642-6","canonicalUrl":"https://aoctrl.com/siemens/5SM2642-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SM2642-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON, RCD-unit, 4 poles, 40 A rated at AC, 300 mA Type A, instantaneous, 50 Hz, IP20.","salesMarkdown":"Instantaneous design — no adjustable delay — so it clears ground faults as fast as the fault current drives it, which matters for personnel protection in circuits where selectivity isn't the primary concern. Type A detection covers sinusoidal AC and pulsating DC residual currents, the standard for most mixed-load panels with electronics, drives, or rectifiers. Rated 40 A at AC, but the thermal derating curve is worth noting for a warm panel: at 40 °C it's 37.2 A, at 50 °C it's 36 A, and at 70 °C it drops to 32 A. Occupies 3 modular width units on DIN rail (124 mm wide, 90 mm tall, 77 mm deep, 70 mm installation depth). Mounts in any position; supply can land top or bottom. Not sealable, so no padlock hasp for lockout/tagout on the device itself. Designed for 50 Hz systems. Rated fault current is fixed at 300 mA — not adjustable. Surge current resistance 1 kA, surge voltage resistance 4 000 V. False tripping protection function is present. The product variation is listed as for 5SY, meaning it pairs mechanically and electrically with Siemens 5SY MCBs for a combined RCBO assembly in the same footprint.","metaTitle":"Siemens 5SM2642-6 SENTRON RCD, 4-Pole 40 A 300 mA Type A","metaDescription":"Siemens 5SM2642-6 SENTRON 4-pole RCD, 40 A rated, 300 mA Type A, instantaneous. Current lifecycle stage. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"77 mm","Width":"124 mm","title":"5SM2642-6","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"No","description":"RC unit for 5SY, 4-pole, type A, In: 40 A, 300 mA, Un AC: 400 V","Design Of Pole":"4 poles","Number Of Poles":"4","lifecycle_stage":"current","Fastening Method":"REG","Mounting Position":"any","at AC rated value":"40 A","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Product Variations":"for 5SY","Degree Of Pollution":"2","Product Designation":"RCD-unit","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"instantaneous","Residual Current Type":"A","at 40 °C rated value":"37.2 A","at 45 °C rated value":"37.2 A","at 50 °C rated value":"36 A","at 55 °C rated value":"34.8 A","at 60 °C rated value":"34 A","at 65 °C rated value":"33.2 A","at 70 °C rated value":"32 A","OFF-delay time adjustable":"No","For Testing Equipment Minimum":"195 V","Number Of Modular Width Units":"3","Position Of Power Supply Cord":"top or bottom","Rated Fault Current Adjustable":"No","Protection Function False Tripping":"Yes","Tripping Fault Current Rated Value":"300 mA","insulation voltage (Ui) rated value":"460 V","Surge Current Resistance Rated Value":"1 kA","Surge Voltage Resistance Rated Value":"4 000 V","Value Range Of The Operating Frequency":"50 Hz","reference code according to IEC 81346-2":"F","Type Of Voltage Of The Operating Voltage":"AC","Value Range Of The Supply Voltage Frequency":"50 Hz","Mechanical Service Life (Operating Cycles) Typical":"10 000","for rated value of the current at AC in hot operating state per pole":"1.9 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$26.85","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/678e5f736464f46f95154537dd8b822d.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=333404&mlfb=5SM2642-6"},"ai":{"faq":[{"question":"What is the 5SM2642-6 rated current and trip threshold?","answer":"Rated 40 A at AC with a 300 mA Type A residual current trip. Type A covers AC and pulsating DC fault currents."},{"question":"Where can I buy 5SM2642-6 and how is it quoted?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"Does 5SM2642-6 pair with a Siemens MCB?","answer":"Yes, the product variation is listed as for 5SY, meaning it mechanically and electrically couples with Siemens 5SY series miniature circuit breakers for a combined RCBO assembly."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM2642-6","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/5SM2642-6 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}}