{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2046-3NB30","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2046-3NB30","canonicalUrl":"https://aoctrl.com/siemens/3RT2046-3NB30","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2046-3NB30","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT2046-3NB30 power contactor, Size S3, 20-33 V AC/DC coil, spring-type terminals, screw and snap-on mounting on 35 mm DIN rail.","salesMarkdown":"## SIRIUS S3 Power Contactor for Motor Loads The Siemens 3RT2046-3NB30 is a SIRIUS S3 power contactor designed for switching motor loads in industrial control panels. It mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 60715, fitting into standard panel layouts. Rated for AC-3 duty at 850 switching cycles per hour maximum, this contactor handles the high inrush of squirrel-cage motors during starting and breaking. The AC-3e rating matches the same 850 1/h ceiling, confirming consistent performance across motor-switching profiles. The coil accepts 20-33 V AC/DC, with a pick-up threshold at 0.8 of rated value and a 1.1 full-scale ceiling. Inrush current peaks at 6.5 A, while steady-state coil draw is 3.5 VA at both 50 and 60 Hz — useful for sizing the control transformer. ## Wiring and Panel Integration Main power terminals accept solid conductors from 2.5 to 16 mm² and stranded from 6 to 70 mm². Auxiliary control wiring uses 2x (0.5 to 2.5 mm²) solid or stranded. The coil connection uses spring-type terminals for fast wiring without retorquing. Physical footprint is 70 mm wide, 140 mm high, and 152 mm deep — the S3 frame size. Clearance requirements: 10 mm above and below, 10 mm to the sides, and 20 mm forward for arc venting. The mounting position allows +/-180° rotation on a vertical surface and +/-22.5° tilt forward/backward, giving flexibility in crowded enclosures. Operating temperature range is -25 to +60 °C; storage from -55 to +80 °C. The contactor is rated for 10 million mechanical cycles typical, with arcing time between 10 and 20 ms and operate delays of 38-57 ms for both AC and DC coils. ## Duty Cycle and Auxiliary Contact Configuration Switching frequency limits vary by duty class: AC-1 (resistive) at 900 1/h, AC-2 (slip-ring motor) at 350 1/h, AC-3 (squirrel-cage motor) at 850 1/h, and AC-4 (plugging/inching) at 250 1/h. These ceilings prevent overheating the contactor in high-cycle applications. The contactor includes an auxiliary switch block (1 NO + 1 NC configuration for main contacts, 10-2 arrangement). The auxiliary switch is present and wired separately for status feedback or interlocking. Coil suppression is built-in for the 20-33 V range. At 24 V rated value, the contactor switches 10 A; at 48 V and 60 V, 2 A; at 110 V, 1 A — these are the rated operational currents for the coil circuit under those specific voltages. ## Lifecycle and Sourcing For compliance documentation, Siemens provides standard declarations for RoHS and REACH. The contactor carries CE marking for the European market and is designed to meet IEC/EN 60947-4-1 for contactors and motor-starters.","metaTitle":"Siemens 3RT2046-3NB30 SIRIUS Power Contactor, S3","metaDescription":"Siemens 3RT2046-3NB30 SIRIUS S3 power contactor. 20-33 V AC/DC coil, spring-type terminals. AC-3 switching capacity. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"152 mm","Solid":"2.5 ... 16 mm²","Width":"70 mm","at AC":"38 ... 57 ms","at DC":"38 ... 57 ms","title":"3RT2046-3NB30","Height":"140 mm","Upwards":"10 mm","Forwards":"20 mm","Stranded":"6 ... 70 mm²","at 50 Hz":"3.5 VA","at 60 Hz":"3.5 VA","Downwards":"10 mm","Arcing Time":"10 ... 20 ms","At The Side":"10 mm","Rated Value":"20 ... 33 V","description":"power contactor, AC-3e/AC-3, 95 A, 45 kW / 400 V, 3-pole, 20-33 V AC/DC, 50/60 Hz, with integrated varistor, auxiliary contacts: 1 NO + 1 NC, main circuit: screw terminal, control and auxiliary circuit: spring-loaded terminal, size: S3","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Spring-type terminals","at AC-1 maximum":"900 1/h","at AC-2 maximum":"350 1/h","at AC-3 maximum":"850 1/h","at AC-4 maximum":"250 1/h","lifecycle_stage":"current","Auxiliary Switch":"Yes","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715","Full-Scale Value":"1.1","at AC-3e maximum":"850 1/h","For Main Contacts":"10 ... 2","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":"S3","Solid Or Stranded":"2x (0.5 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Inrush Current Peak":"6.5 A","Product Designation":"Power contactor","at 24 V rated value":"10 A","at 48 V rated value":"2 A","at 60 V rated value":"2 A","Of Contactor Typical":"10 000 000","at 110 V rated value":"1 A","at 125 V rated value":"0.9 A","at 220 V rated value":"0.3 A","at 230 V rated value":"20 hp","at 400 V rated value":"3 A","at 440 V rated value":"0.8 A","at 480 V rated value":"96 A","at 50 Hz rated value":"20 ... 33 V","at 500 V rated value":"2 A","at 60 Hz rated value":"20 ... 33 V","at 600 V rated value":"77 A","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","at 1000 V rated value":"37 kW","For Auxiliary Contacts":"20 ... 14","For Main Current Circuit":"screw-type terminals","at 110/120 V rated value":"10 hp","at 200/208 V rated value":"30 hp","at 220/230 V rated value":"30 hp","at 460/480 V rated value":"75 hp","at 575/600 V rated value":"75 hp","Locked-Rotor Current Peak":"6.5 A","Relative Humidity Minimum":"10 %","Holding Current Mean Value":"75 mA","Of Main Circuit Rated Value":"8 kV","at AC-3 rated value maximum":"1 000 V","at AC in hot operating state":"19.8 W","at AC-2 at 400 V rated value":"45 kW","at AC-3e rated value maximum":"1 000 V","at AC-4 at 400 V rated value":"80 A","safety-related switching OFF":"Yes","Substance Prohibitance (Date)":"03/01/2017","Design Of The Surge Suppressor":"with varistor","Duration Of Inrush Current Peak":"50 µs","Locked-Rotor Current Mean Value":"3.2 A","Duration Of Locked-Rotor Current":"150 ms","Of Auxiliary Circuit Rated Value":"6 kV","at AC-5a up to 690 V rated value":"114 A","at AC-5b up to 400 V rated value":"95 A","For Auxiliary And Control Circuit":"spring-loaded terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gG: 160 A (690 V, 100 kA), aM: 100 A (690 V, 100 kA), BS88: 125 A (415 V, 80 kA)","Without Load Current Share Typical":"3.5 W","closing power of magnet coil at DC":"76 W","holding power of magnet coil at DC":"2.7 W","At Contactor For Auxiliary Contacts":"Spring-type terminals","With Type Of Coordination 1 Required":"gG: 250 A (690 V, 100 kA), aM: 160 A (690 V, 100 kA), BS88: 200 A (415 V, 80 kA)","at AWG cables for auxiliary contacts":"2x (20 ... 16)","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"6.6 W","number of NO contacts for main contacts":"3","reference code according to IEC 81346-2":"Q","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²)","Number Of Poles For Main Current Circuit":"3","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","mirror contact according to IEC 60947-4-1":"Yes","with low demand rate according to SN 31920":"40 %","Finely Stranded Without Core End Processing":"2x (0.5 ... 2.5 mm²)","with high demand rate according to SN 31920":"73 %","Type Of Voltage Of The Control Supply Voltage":"AC/DC","Limited To 1 S Switching At Zero Current Maximum":"1 725 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"1 297 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 10 S Switching At Zero Current Maximum":"946 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"610 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"486 A; Use minimum cross-section acc. to AC-1 rated value","contact rating of auxiliary contacts according to UL":"A600 / P600","Of Main Circuit With Degree Of Pollution 3 Rated Value":"1 000 V","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","Of Auxiliary Circuit With Degree Of Pollution 3 Rated Value":"690 V","For Short-Circuit Protection Of The Auxiliary Switch Required":"gG: 10 A (500 V, 1 kA)","minimum cross-section in main circuit at maximum AC-1 rated value":"50 mm²","number of NC contacts for auxiliary contacts instantaneous contact":"1","number of NO contacts for auxiliary contacts instantaneous contact":"1","Of The Contactor With Added Electronically Optimized Auxiliary Switch Block Typical":"5 000 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/7d28fa7380658c541019ac8751bc4da6.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=629913&mlfb=3RT2046-3NB30"},"ai":{"faq":[{"question":"What is the AC-3 switching capacity of this contactor?","answer":"The 3RT2046-3NB30 is rated for AC-3 duty at 850 switching cycles per hour maximum. This is the standard rating for squirrel-cage motor starting and breaking applications. The AC-3e rating matches the same 850 1/h ceiling."},{"question":"What are the mounting and clearance requirements for the 3RT2046-3NB30?","answer":"The contactor mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 60715. Clearance requirements: 10 mm above and below, 10 mm to the sides, and 20 mm forward for arc venting. The mounting position allows +/-180° rotation on a vertical surface and +/-22.5° tilt forward/backward."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2046-3NB30","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/3RT2046-3NB30 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}}