{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2344-1CN20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2344-1CN20","canonicalUrl":"https://aoctrl.com/siemens/3RH2344-1CN20","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2344-1CN20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, 3RH2344-1CN20, size S00, 4 NO instantaneous contacts, 690 V rated insulation voltage, screw and snap-on mounting onto 35 mm DIN rail.","salesMarkdown":"The Siemens 3RH2344-1CN20 is a SIRIUS auxiliary contactor, size S00, with 4 normally-open instantaneous contacts. It's the switching block that extends the signal-routing capacity of a main contactor or starter — think of it as the relay that tells the PLC 'the motor contactor has pulled in' or that sequences a downstream solenoid. Rated insulation voltage goes to 690 V, so it lives comfortably in 400 VAC panels. The housing is 45 mm wide, 57.5 mm tall, 117 mm deep — that's a compact footprint for a 4-pole block, and it shares the S00 envelope with the matching 3RT2 contactors. Each NO contact is rated for 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 1 A at 690 V — the thermal current follows the usual inverse curve as voltage climbs. At 24 VDC the contacts handle 10 A; at 60 VDC that drops to 4.7 A, and at 220 VDC it's 1.2 A. The arcing time sits between 10 and 15 ms, which is typical for an AC coil contactor of this size. For DC switching at higher voltages, watch the make/break energy — the 0.26 A at 600 VDC tells you this isn't a DC load-break monster; it's sized for control signals and small solenoids. The contacts are instantaneous — no timing delays, no overlap adjustment. That makes them a straight choice for feedback to a PLC input or for interlocking where you need the contact to follow the armature position exactly. ## Environmental and compliance details The minimum relative humidity is 10 %, so dry climates or heated cabinets aren't a problem.","metaTitle":"Siemens 3RH2344-1CN20 SIRIUS Auxiliary Contactor, 4 NO, S00,","metaDescription":"Siemens 3RH2344-1CN20 SIRIUS auxiliary contactor, 4 instantaneous contacts, size S00, 690 V rated insulation voltage, screw and snap-on 35 mm DIN rail mounting. Current production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"117 mm","Width":"45 mm","at AC":"4 ... 15 ms","at DC":"10 000 1/h","title":"3RH2344-1CN20","Height":"57.5 mm","Upwards":"10 mm","Forwards":"10 mm","at 50 Hz":"0.8 ... 1.1","at 60 Hz":"0.85 ... 1.1","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"6 mm","description":"Contactor relay with auxiliary switch 220 V AC, 50 / 60 Hz Size S00, screw terminal, 4 NC basic unit / EN Varistor plugged on","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail","Mounting Position":"+/-180° rotation possible on vertical mounting surface; can be tilted forward and backward by +/- 22.5° on vertical mounting surface","Size Of Contactor":"S00","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²","Product Brand Name":"SIRIUS","Degree Of Pollution":"3","Product Designation":"Auxiliary contactor","at 24 V rated value":"10 A","at 60 V rated value":"4.7 A","Of Contactor Typical":"10 000 000","at 110 V rated value":"3 A","at 220 V rated value":"1.2 A","at 230 V rated value":"6 A","at 400 V rated value":"3 A","at 440 V rated value":"0.5 A","at 50 Hz rated value":"220 V","at 500 V rated value":"2 A","at 60 Hz rated value":"220 V","at 600 V rated value":"0.26 A","at 690 V rated value":"1 A","Instantaneous Contact":"4","Relative Humidity Minimum":"10 %","Substance Prohibitance (Date)":"07/01/2006","Design Of The Surge Suppressor":"with varistor","Product Extension Auxiliary Switch":"No","Surge Voltage Resistance Rated Value":"6 kV","operating frequency at DC-12 maximum":"1 000 1/h","operating frequency at DC-13 maximum":"1 000 1/h","operational current at AC-12 maximum":"10 A","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 2x 12","reference code according to IEC 81346-2":"K","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","with low demand rate according to SN 31920":"40 %","apparent holding power of magnet coil at AC":"5.7 VA","apparent pick-up power of magnet coil at AC":"37 VA","with high demand rate according to SN 31920":"73 %","number of NC contacts for auxiliary contacts":"4","number of NO contacts for auxiliary contacts":"4","Type Of Voltage Of The Control Supply Voltage":"AC","contact rating of auxiliary contacts according to UL":"A600 / Q600","Inductive Power Factor With Closing Power Of The Coil":"0.8","Identification Number And Letter For Switching Elements":"44 E","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Inductive Power Factor With The Holding Power Of The Coil":"0.25","Type Of Electrical Connection For Auxiliary And Control Circuit":"screw-type terminals","insulation voltage with degree of pollution 3 at AC rated value":"690 V","Design Of The Fuse Link For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A","design of the miniature circuit breaker for short-circuit protection of the auxiliary circuit up to 230 V":"C characteristic: 6 A; 0.4 kA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/8abc824ad2948f83d24b60ac71b93e60.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=522644&mlfb=3RH2344-1CN20"},"ai":{"faq":[{"question":"What is the depth and width of 3RH2344-1CN20?","answer":"Depth is 117 mm, width is 45 mm, height is 57.5 mm. It mounts on 35 mm DIN rail via screw and snap-on."},{"question":"How do I get current pricing and availability for 3RH2344-1CN20?","answer":"Submit an RFQ through this listing. Availability and current pricing are confirmed at quote time through independent distribution channels."},{"question":"What compliance documentation does 3RH2344-1CN20 have?","answer":"RoHS compliance is indicated by a substance prohibition date of July 1, 2006. The part is rated for pollution degree 3 and operates from -25 to +60 °C."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2344-1CN20","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/3RH2344-1CN20 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}}