{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2353-1DG40-0KA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2353-1DG40-0KA0","canonicalUrl":"https://aoctrl.com/siemens/3RH2353-1DG40-0KA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2353-1DG40-0KA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH2353-1DG40-0KA0 auxiliary contactor, size S00, 5 NO contacts, 125 VDC coil with varistor, screw and snap-on 35 mm DIN rail mounting.","salesMarkdown":"## What this auxiliary contactor is The Siemens 3RH2353-1DG40-0KA0 is a SIRIUS auxiliary contactor, size S00, with 5 normally open (NO) instantaneous contacts. The coil is rated 125 VDC and includes a built-in varistor surge suppressor, which clips voltage spikes from the inductive coil during de-energization — this protects downstream PLC outputs and reduces electrical noise on the DC control bus. ## Switching capacity across the DC voltage range The contact ratings are specified per the DC switching curve: at 24 V rated value the contacts carry 10 A, at 60 V it drops to 4.7 A, at 110 V it is 3 A, and at 220 V it is 1.2 A. At 440 V the rating is 0.5 A, and at 600 V it is 0.26 A. The size S00 frame is the smallest Siemens contactor footprint, so it fits in compact panel layouts alongside motor starters or PLC racks. The substance prohibitance date is 07/01/2006, indicating RoHS compliance from that date. The product extension auxiliary switch is listed as 'No' — this is a standalone contactor block, not a stackable add-on switch.","metaTitle":"Siemens 3RH2353-1DG40-0KA0 SIRIUS Auxiliary Contactor, 5 NO","metaDescription":"Siemens SIRIUS 3RH2353-1DG40-0KA0 auxiliary contactor, size S00, 5 NO contacts, rated 125 VDC. Current production. Screw and snap-on DIN rail mount.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"121 mm","Width":"45 mm","at AC":"10 000 1/h","at DC":"7 ... 13 ms","title":"3RH2353-1DG40-0KA0","Height":"57.5 mm","Upwards":"10 mm","Forwards":"10 mm","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"6 mm","Rated Value":"125 V","description":"Contactor relay, 5 NO + 3 NC, 125 V DC, Size S00, screw terminal, plugged-on varistor","Initial Value":"0.8","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","Full-Scale Value":"1.1","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 500 V rated value":"2 A","at 600 V rated value":"0.26 A","at 690 V rated value":"1 A","Instantaneous Contact":"5","Relative Humidity Minimum":"10 %","Substance Prohibitance (Date)":"07/01/2006","Design Of The Surge Suppressor":"with varistor","Product Extension Auxiliary Switch":"No","closing power of magnet coil at DC":"4 W","holding power of magnet coil at DC":"4 W","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 %","with high demand rate according to SN 31920":"73 %","number of NC contacts for auxiliary contacts":"3","number of NO contacts for auxiliary contacts":"5","Type Of Voltage Of The Control Supply Voltage":"DC","contact rating of auxiliary contacts according to UL":"A600 / Q600","Identification Number And Letter For Switching Elements":"53 E","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","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/5c66a5b7f2bb41dc0c804b8c71b51262.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=310421&mlfb=3RH2353-1DG40-0KA0"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2353-1DG40-0KA0","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/3RH2353-1DG40-0KA0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}