{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1SVR405621R2100","brand":"ABB","brandSlug":"abb","productSlug":"1SVR405621R2100","canonicalUrl":"https://aoctrl.com/abb/1SVR405621R2100","factsUrl":"https://aoctrl.com/api/mcp/products/1SVR405621R2100","rawCanonicalId":null},"summary":{"shortDescription":"ABB CR-U series general purpose relay, 1SVR405621R2100, DPDT, 120V AC coil, 10 A contact rating, 8-pin octal base, socket mount with LED indicator.","salesMarkdown":"## DPDT switching with a 10 A contact ceiling The 1SVR405621R2100: The 10 A contact rating at 250 V defines the resistive load ceiling for the DPDT output. For inductive loads like small contactors or solenoid valves, derate to 50-70% of this figure to stay within the relay's switching life. The 8-pin octal base follows the standard layout for socket-mounted relays — pin 1 and 4 are the coil, pins 5-8 and 2-3 are the two form-C contact sets. No wiring surprises if you're replacing an existing octal relay. ## Socket mount with LED — panel integration note Socket mounting means the relay body snaps into a separate base (not included). The LED across the coil terminals gives a quick visual coil-energised check during panel commissioning — saves a meter probe when tracing a 120V AC control loop. The CR-U series positions this as an interface relay between a PLC digital output and a higher-current field device. The 120V AC coil isolates the 24V DC control side from the 250V AC switched side. ## Current lifecycle — sourcing for BOM freeze The 8-pin octal form factor is a de facto standard across multiple manufacturers. If a BOM freeze requires a second source, any DPDT 120V AC octal relay with a 10 A contact rating is a functional match — but the CR-U series LED and ABB traceability are the differentiators here.","metaTitle":"ABB 1SVR405621R2100 General Purpose Relay, DPDT","metaDescription":"ABB CR-U series general purpose relay, 8-pin octal base, DPDT, 120V AC coil, 10A contact rating. Socket mount with LED. Current lifecycle. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["General Purpose Relays"],"specifications":{"Amps":"10","Base":"8-Pin","Type":"General Purpose Relay","Poles":"2","title":"1SVR405621R2100","Mounting":"Socket","description":"General Purpose Relay, 8 Pin, DPDT, 120V AC|General Purpose Relay, 120V AC Coil, DPDT, 250V Rated, Contact Rating: 10 Amp. Terminal Style: 8 Pin. CR-U Series. Socket Mountable Interface Relay with LED.","lifecycle_stage":"current","Volts AC Control":"120"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$10.67","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/12d53425871972049ac0b1ab78eb28b0.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the contact rating and coil voltage for 1SVR405621R2100?","answer":"The relay switches 10 A at 250 V AC through a DPDT contact arrangement. The coil is rated for 120V AC with an integrated LED indicator for coil energisation status."},{"question":"What base form factor does this relay use?","answer":"It uses the standard 8-pin octal base — the same footprint as common octal relays from other brands. The relay body mounts into a separate socket (not included in this order code)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/abb/1SVR405621R2100","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/abb/1SVR405621R2100 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}}