{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"D4BS-4AFS-NPT","brand":"Omron","brandSlug":"omron","productSlug":"D4BS-4AFS-NPT","canonicalUrl":"https://aoctrl.com/omron/D4BS-4AFS-NPT","factsUrl":"https://aoctrl.com/api/mcp/products/D4BS-4AFS-NPT","rawCanonicalId":null},"summary":{"shortDescription":"Omron D4BS Tongue Interlock Switch, D4BS-4AFS-NPT, 2NC slow-action contacts, metal body, 1/2-14NPT conduit entry.","salesMarkdown":"## Safety-Rated Guard Monitoring in Heavy-Duty Panels The D4BS-4AFS-NPT is a tongue interlock switch — Omron classifies it as a general-purpose safety door switch with a metal body built for heavy-duty applications, typically deployed on machine guard doors and access panels in industrial自动化 systems where the switch directly controls power to a hazardous motion circuit. ## 2NC Slow-Action Contacts — What the Rating Means Contact configuration is 2NC (slow-action), meaning two normally-closed contacts actuate at a defined mechanical travel rate — this slow-action mechanism provides positive opening in a safety circuit, ensuring the contacts separate reliably when the guard opens rather than relying on spring rebound alone. ## 1/2-14NPT Conduit Entry for Panel Wiring The conduit entry is sized for 1/2-14NPT (1-conduit), the standard North American trade size for a single cable gland — confirm your field wiring preparation matches this thread form before specifying the entry fitting; NPT threads require dope or tape to seal properly in an industrial enclosure. ## Mature Lifecycle — Sourcing Posture Omron lists this switch at lifecycle stage: mature — a long-run product in the D4BS family, supported for existing panel builds and maintenance sourcing, with availability confirmed at quote against an RFQ through independent distribution.","metaTitle":"Omron D4BS-4AFS-NPT, 2NC Tongue Interlock, 1/2-14NPT","metaDescription":"Omron D4BS-4AFS-NPT tongue interlock switch, 2NC slow-action contacts, metal body, 1/2-14NPT conduit entry. Available to order via RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Limit Switches"],"specifications":{"title":"D4BS-4AFS-NPT","description":"D4BS Tongue Interlock Switches|A general purpose safety door switch with a metal body, suitable for heavy duty applications","Conduit size":"1/2-14NPT (1-conduit)","lifecycle_stage":"mature","Contact Configuration":"2NC (slow-action)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$218.30","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/2fa40ed946118506c9fbdb610d905775.pdf","sourceUrl":"https://automation.omron.com/en/us/products/family/d4bs"},"ai":{"faq":[{"question":"What conduit entry does the D4BS-4AFS-NPT use?","answer":"It is listed with a 1/2-14NPT (1-conduit) thread — the standard single-cable gland entry for North American industrial enclosures, requiring NPT-compatible fittings and thread sealant."},{"question":"What contact configuration does the D4BS-4AFS-NPT provide?","answer":"The switch carries a 2NC slow-action contact arrangement — two normally-closed poles that positive-open on guard actuation, the standard configuration for safety interlock circuits where reliable contact separation is mandated."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/omron/D4BS-4AFS-NPT","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/omron/D4BS-4AFS-NPT 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}}