{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MJN2CK-AC120","brand":"Omron","brandSlug":"omron","productSlug":"MJN2CK-AC120","canonicalUrl":"https://aoctrl.com/omron/MJN2CK-AC120","factsUrl":"https://aoctrl.com/api/mcp/products/MJN2CK-AC120","rawCanonicalId":null},"summary":{"shortDescription":"Omron MJN Series MJN2CK-AC120 general purpose relay, DPDT, 120V AC coil, 10 A contact rating, socket mount, 9 pins, C socket code.","salesMarkdown":"## Form factor and socket mount The Omron MJN2CK-AC120 is a compact enclosed DPDT relay in the MJN series, socket-mounted on a 9-pin octal-style base with a C socket code. It drops into a panel like any other octal relay — the pin terminals are the only electrical connection, and the relay body is keyed against mis-mating. A manual push-to-test button on the top face lets the commissioning engineer exercise the armature by hand before energizing the coil, which speeds the FAT/SAT loop on any line that needs the relay proven out before the field wiring is live. ## Coil, contacts, and what the 10 A actually means The coil is rated 120V AC nominal at 60 Hz, which is the standard North American control-transformer secondary — the relay can be wired directly across a 120 VAC control bus without an interposing relay. Contact rating is 10 A at 240V AC and 10 A at 28V DC, both under the resistive ceiling — the DPDT form lets the same device switch a pair of loads or a reversing pair from one coil. It is motor-rated, with a 1/3 hp rating at 120V AC and 1/2 hp at 240V AC, which means it will switch small fractional-horsepower motor loads (fans, small pumps, solenoid-actuated valves) directly without an interposing contactor. Dielectric strength is greater than 2,500V AC RMS between mutually insulated elements and greater than 750V AC RMS across the open contacts — adequate for industrial control-panel environments where the relay sits near higher-voltage wiring. ## Electrical and mechanical life for the BOM planner Electrical operating durability is 100,000 cycles and mechanical operating durability is 10,000,000 cycles, the typical 100:1 ratio between unloaded mechanical life and loaded electrical life that defines a relay's maintenance interval. No status indicator is fitted — coil state has to be read at the socket or downstream, so for cabinets where visual state matters a parallel indicator lamp or an auxiliary output is the usual fix. ## Sourcing posture and lifecycle Lifecycle stage is recorded as mature on the manufacturer's part record.","metaTitle":"Omron MJN2CK-AC120 DPDT Relay, 120V AC, 10 A","metaDescription":"Omron MJN2CK-AC120 MJN series DPDT plug-in relay, 120V AC coil, 10 A contacts, socket mount, 9 pins. Quoted to order against the BOM; availability at RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["General Purpose Relays"],"specifications":{"title":"MJN2CK-AC120","Series":"MJN Series","Sealing":"Enclosed","Motor Rated":"Yes","Socket Code":"C","description":"OMRON Latching Relay: Socket Mounted, 10 A Current Rating, 120V AC, 9 Pins/Terminals, DPDT, C Socket","Coil Voltage":"120V AC","Contact Form":"DPDT","Current Rating":"10 A","lifecycle_stage":"mature","Status Indicator":"No Indicator","Contact Rating (AC)":"10 A @ 240V","Contact Rating (DC)":"10 A @ 28V","Dielectric Strength":">2,500V AC RMS 60 Hz All Other Mutually Insulated Elements; >750V AC RMS 60 Hz Across Open Contacts","Push-To-Test Button":"Manual Push Test Button","Horsepower @ 120V AC":"1/3 hp","Horsepower @ 240V AC":"1/2 hp","Relay Mounting Style":"Socket","Number of Pins/Terminals":"9","Electrical Connection Type":"Pin","Coil Voltage (Nominal@60Hz)":"120V AC","Electrical Operating Durability":"100,000","Mechanical Operating Durability":"10,000,000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$63.90 – $96.37","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e51cbad8433f24c93e3ee3d55a8a7c3b.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What motor load can MJN2CK-AC120 switch directly?","answer":"The motor rating is 1/3 hp at 120V AC and 1/2 hp at 240V AC, so it will directly switch fractional-horsepower loads such as small fans, pumps, and solenoid-actuated valves without an interposing contactor. For larger motors the relay is used as the pilot device only."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/omron/MJN2CK-AC120","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/MJN2CK-AC120 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}}