{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL4302-0RC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL4302-0RC","canonicalUrl":"https://aoctrl.com/siemens/5SL4302-0RC","factsUrl":"https://aoctrl.com/api/mcp/products/5SL4302-0RC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens Betagard 5SL4302-0RC, miniature circuit breaker, 2 A, 3-pole, Z characteristic, 10 kA per EN 60898, 15 kA per IEC 60947-2, 440 V AC, IP20.","salesMarkdown":"The Z curve trips between 2 and 3 times rated current — tighter than a B curve (3–5× In) — so it holds the unit on the grid for brief inrush but clears a fault before the silicon lets go. Breaking capacity is 10 kA per EN 60898 and 15 kA per IEC 60947-2 at 415 V AC, which means it can interrupt a fault up to that level without cascading upstream in a panel fed from a transformer of that capacity. The Z characteristic is the deciding factor here. Standard MCBs for motor or general distribution use a C or D curve; this part is for circuits where the load is a rectifier, a switched-mode power supply, or a control transformer — devices that draw near-sinusoidal current with minimal inrush but can't tolerate a prolonged overcurrent. The 2 A rating means the continuous load should not exceed about 1.6 A (80 % derating per IEC 60947-2 for a warm enclosure) provided the ambient stays under 40 °C. Voltage rating covers 415 V AC phase-to-phase (3-pole) and 440 V AC maximum for multi-phase or single-phase operation, so it fits standard 400 V three-phase panels and 230/400 V TN systems. The DC rating tops out at 72 V, which limits its use on DC circuits to 48 V battery banks or 60 V control loops — not for 125 V DC substation batteries. The breaker is sealable, so a panel builder can lock the toggle position with a wire seal or padlock hasp to prevent unauthorized reset after a trip.","metaTitle":"Siemens Betagard 5SL4302-0RC MCB, 2A 3-Pole Z-Characteristic","metaDescription":"Siemens Betagard 5SL4302-0RC miniature circuit breaker, 2A, 3-pole, Z characteristic, 10 kA per EN 60898, 15 kA per IEC 60947-2, 440 V AC, IP20. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["3-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"54 mm","title":"5SL4302-0RC","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature Circuit Breaker 2A 3-pole Z characteristic 10kA","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"3P","Number Of Poles":"3","lifecycle_stage":"current","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"Betagard","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","at DC rated value maximum":"72 V","Number Of Modular Width Units":"3","Tripping Characteristic Class":"Z","supply voltage at AC rated value":"415 V","according to EN 60898 rated value":"10 kA","according to IEC 60947-2 rated value":"15 kA","Type Of Voltage Of The Operating Voltage":"AC","with multi-phase operation at AC maximum":"440 V","Value Range Of The Supply Voltage Frequency":"50/60 Hz","with multi-phase operation at AC rated value":"440 V","with single-phase operation at AC rated value":"440 V","vibration resistance according to IEC 60068-2-6":"50 m/s² at 25 to 150 Hz","Product Extension Installable Supplementary Devices":"Yes"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/5b69e2d7e81e2f42b38e770e8cc909de.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1502377&mlfb=5SL4302-0RC"},"ai":{"faq":[{"question":"What is the closest functional second-source for 5SL4302-0RC?","answer":"There is no direct drop-in second-source with the same Z characteristic and 3-pole 2 A rating in the same footprint. The SENTRON 5SL4363-7 is a 3-pole C-curve breaker with a different tripping characteristic and higher current rating — it will not protect sensitive semiconductor loads the same way. If you need a Z-curve replacement, the 5SL4302-0RC is the specified part."},{"question":"Will 5SL4302-0RC drop into a panel specified around 5SL4363-7?","answer":"Physically yes — both are 3-pole, 54 mm wide (3 modular units), 76 mm deep, and mount on the same DIN rail. But the 5SL4363-7 is a C-curve breaker rated 63 A, while the 5SL4302-0RC is a Z-curve rated 2 A. The tripping characteristic and current rating are completely different; you cannot substitute one for the other without redesigning the branch circuit protection."},{"question":"How do I get current pricing and availability for 5SL4302-0RC?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What compliance documentation does Siemens provide for 5SL4302-0RC?","answer":"The Betagard series carries CE marking per the Low Voltage Directive, and the breaker is designed to EN 60898 and IEC 60947-2. It is halogen-free and silicon-free. Specific RoHS and REACH declarations are available from Siemens upon request for the order code."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL4302-0RC","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/5SL4302-0RC 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}}