{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2421-4DA10-Z W97","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2421-4DA10-Z-W97","canonicalUrl":"https://aoctrl.com/siemens/3RV2421-4DA10-Z-W97","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2421-4DA10-Z%20W97","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RV2 motor starter protector, size S0, circuit breaker for transformer protection, A-release 18-25 A, N-release 400 A, screw terminal, standard switching capacity, multi-unit packaging (12 units).","salesMarkdown":"## Transformer protection breaker in the SIRIUS 3RV2 family The Siemens 3RV2421-4DA10-Z W97 is a size S0 circuit breaker from the SIRIUS 3RV2 motor starter protector family, specifically configured for transformer protection. Its A-release is adjustable 18-25 A, and the N-release (magnetic short-circuit trip) is fixed at 400 A, sized to handle transformer inrush without nuisance tripping while protecting the secondary winding from sustained overloads. This variant uses screw terminals and carries standard switching capacity. It ships in a multi-unit pack of 12 pieces, which is the packaging quantity — the same part number applies to each individual breaker within the bundle. RoHS compliance is documented since October 1, 2009. The REACH Article 33 declaration notes the presence of lead titanium zirconium oxide (CAS 12626-81-2) above 0.1% w/w — this is a standard disclosure for certain ceramic components in the breaker arc chamber and does not affect normal handling or installation. The S0 frame size is a standard DIN-rail mount footprint common across the SIRIUS 3RV2 range. The screw terminals accept copper conductors typical for motor and transformer branch circuits up to 25 A. The multi-unit pack (12 units) is intended for panel builders or MRO planners stocking a common transformer-protection breaker across multiple machines — each unit is individually functional, not a linked assembly.","metaTitle":"Siemens 3RV2421-4DA10-Z W97 SIRIUS 3RV2 Circuit Breaker, 18-","metaDescription":"Siemens 3RV2421-4DA10-Z W97 SIRIUS 3RV2 motor starter protector, size S0, for transformer protection. A-release 18-25 A, N-release 400 A. Active lifecycle, available to order. RoHS","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"title":"3RV2421-4DA10-Z W97","Group Code":"R711","description":"Circuit breaker size S0 for transformer protection A-release 18...25 A N-release 400 A screw terminal Standard switching capacity Multi-unit packaging Pack = 12 units","Product Group":"5333","Product class":"A: Standard product which is a stock item could be returned within the returns guidelines/period.","Quantity Unit":"1 Piece","Product Family":"SIRIUS 3RV2 motor starter protectors","lifecycle_stage":"current","Packaging Quantity":"1","Export Control Regulations":"AL : N / ECCN : N","Packaging dimensions (L x W x H)":"102.00 x 49.00 x 102.00 mm","Compliance with the substance restrictions according to RoHS directive":"Since: 01-10-09","REACH Art. 33 Duty to inform according to the current list of candidates":"Lead titanium zirconium oxide CAS-No. 12626-81-2 > 0,1 % (w / w)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e0c3196f650ac12a443c0952213c58eb.pdf","sourceUrl":"https://sieportal.siemens.com/en-ae/products-services/detail/3RV2421-4DA10-ZW97?tree=CatalogTree"},"ai":{"faq":[{"question":"What is the 3RV2421-4DA10-Z W97 used for?","answer":"This circuit breaker is designed for transformer protection. The A-release adjustable from 18-25 A protects against sustained overloads, while the fixed N-release at 400 A handles short-circuit protection, sized to accommodate transformer inrush current without nuisance tripping."},{"question":"What compliance documentation is available for the 3RV2421-4DA10-Z W97?","answer":"RoHS compliance is confirmed since October 1, 2009. The REACH Article 33 declaration identifies lead titanium zirconium oxide (CAS 12626-81-2) above 0.1% w/w. Export control classifications are AL: N and ECCN: N, indicating no special licensing requirements for most destinations."},{"question":"Where can I buy the 3RV2421-4DA10-Z W97?","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 commercial offer."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2421-4DA10-Z-W97","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/3RV2421-4DA10-Z-W97 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}}