{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1076-6PF35","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1076-6PF35","canonicalUrl":"https://aoctrl.com/siemens/3RT1076-6PF35","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1076-6PF35","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1076-6PF35 power contactor, Size S12, screw fixing, 96-127 VAC/VDC coil, screw-type terminals, 70-240 mm² stranded main conductors, 214 x 225 x 180 mm (HxWxD).","salesMarkdown":"## SIRIUS S12 — what the frame size tells you about panel fit The 3RT1076-6PF35: This is a Siemens SIRIUS Size S12 power contactor — the frame size tells you the mounting hole pattern and the bus-bar / cable lug spacing are fixed for this class. It uses screw fixing, not DIN-rail snap-on, so plan for drilled and tapped backplate or threaded inserts. The body measures 214 mm high by 180 mm wide by 225 mm deep. That depth includes the arc chamber and the coil housing — it's a deep unit, so check the gland-plate clearance and the door swing if the contactor sits near the enclosure front. Clearance distances are specified: 10 mm upwards and downwards, 20 mm forwards, and 10 mm at the sides. Those are minimums for arc flash and heat dissipation — don't crowd it against cable ducts or other devices. ## Coil voltage and termination — screw terminals, 96-127 V range The magnet coil is rated for 96-127 V, covering both AC and DC supplies. The coil connection uses screw-type terminals — standard for panel wiring, but torque them to the manufacturer's spec to avoid loose connections under vibration. Operating delay is 80-100 ms for both AC and DC. That's the time from coil energisation to main contact closure — factor it into your sequence timing if this contactor is in a safety or interlock chain. Arcing time on dropout is 10-15 ms. That's the interval between coil de-energisation and arc extinction — relevant for contact erosion estimates and for coordinating with upstream overcurrent devices. ## Main and auxiliary conductor sizing Main pole connections accept stranded copper from 70 mm² up to 240 mm². That's a heavy cable range — you'll be using compression lugs or two-hole palm lugs with the single 11 mm hole. Auxiliary switch terminals accept 2x 0.5-1.5 mm² solid or 2x 0.75-2.5 mm² stranded, with a maximum of 2x 0.75-4 mm². The auxiliary switch is present — these are the smaller screw terminals on the side of the contactor. Auxiliary contact ratings: 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, 1 A at 110 V. These are the make/break capacities for the auxiliary contacts — useful for pilot duty or PLC input circuits. ## Switching frequency and duty cycle limits Maximum switching rates per duty class: AC-1 (resistive) 500 operations/hour, AC-2 (slip-ring motor) 170 ops/h, AC-3 (squirrel-cage motor) 420 ops/h, AC-4 (plugging/inching) 130 ops/h. The AC-3e rating matches AC-3 at 420 ops/h. These are the thermal limits of the contactor — exceeding them shortens contact life and can cause welding. For high-cycle applications like conveyor indexing, stay well below the AC-3 ceiling. ## Environmental limits and mounting orientation Operating ambient temperature range is -25 to +60 °C; storage range is -55 to +80 °C. The contactor can be mounted on a vertical surface, rotatable ±90° and tiltable ±22.5° forward/back. That gives flexibility in tight enclosures — just keep the arc chamber orientation within those limits. Mechanical endurance is rated at 10 million operations typical. That's the mechanical life before the contactor wears out mechanically — electrical life will be lower and depends on the switching current and duty class.","metaTitle":"Siemens 3RT1076-6PF35 SIRIUS Contactor, Size S12","metaDescription":"Siemens 3RT1076-6PF35 SIRIUS power contactor, Size S12, 96-127 VAC/VDC coil, screw-type terminals, 70-240 mm² stranded main conductors. Current production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"225 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)","Width":"180 mm","at AC":"80 ... 100 ms","at DC":"80 ... 100 ms","title":"3RT1076-6PF35","Height":"214 mm","Upwards":"10 mm","Forwards":"20 mm","Stranded":"70 ... 240 mm²","at 50 Hz":"0.4","at 60 Hz":"0.4","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"10 mm","Rated Value":"96 ... 127 V","description":"power contactor, AC-3e/AC-3 500 A, 250 kW / 400 V AC (50-60 Hz) / DC Uc: 96-127 V PLC input 24 V DC 3-pole, auxiliary contacts 1 NO + 1 NC drive: electronic main circuit: busbar control and auxiliary circuit: screw terminal with remaining lifetime indicator","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","Number Of Holes":"1","at AC-1 maximum":"500 1/h","at AC-2 maximum":"170 1/h","at AC-3 maximum":"420 1/h","at AC-4 maximum":"130 1/h","lifecycle_stage":"current","Auxiliary Switch":"Yes","During Operation":"-25 ... +60 °C","Fastening Method":"screw fixing","Full-Scale Value":"1.1","at AC-3e maximum":"420 1/h","Diameter Of Holes":"11 mm","Mounting Position":"with vertical mounting surface +/-90° rotatable, with vertical mounting surface +/- 22.5° tiltable to the front and back","Size Of Contactor":"S12","Solid Or Stranded":"2x (0,5 ... 1,5 mm²), 2x (0,75 ... 2,5 mm²), max. 2x (0,75 ... 4 mm²)","Product Brand Name":"SIRIUS","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":"6 A","at 400 V rated value":"3 A","at 440 V rated value":"1.4 A","at 480 V rated value":"477 A","at 50 Hz rated value":"96 ... 127 V","at 500 V rated value":"2 A","at 60 Hz rated value":"96 ... 127 V","at 600 V rated value":"472 A","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","at 1000 V rated value":"250 kW","For Auxiliary Contacts":"18 ... 14","Width Of Connection Bar":"25 mm","For Main Current Circuit":"Connection bar","at 200/208 V rated value":"150 hp","at 220/230 V rated value":"200 hp","at 460/480 V rated value":"400 hp","at 575/600 V rated value":"500 hp","Relative Humidity Minimum":"10 %","Of Main Circuit Rated Value":"8 kV","Thickness Of Connection Bar":"6 mm","at AC-3 rated value maximum":"1 000 V","at AC in hot operating state":"165 W","at AC-3e rated value maximum":"1 000 V","at AC-4 at 400 V rated value":"430 A","safety-related switching OFF":"Yes","Substance Prohibitance (Date)":"05/01/2012","Design Of The Surge Suppressor":"with varistor","Of Auxiliary Circuit Rated Value":"6 kV","at AC-5a up to 690 V rated value":"536 A","at AC-5b up to 400 V rated value":"415 A","For Auxiliary And Control Circuit":"screw-type terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gG: 500 A (690 V, 100 kA), aM: 500 A (690 V, 50 kA), BS88: 500 A (415 V, 50 kA)","Without Load Current Share Typical":"3.6 W","closing power of magnet coil at DC":"800 W","holding power of magnet coil at DC":"3.6 W","At Contactor For Auxiliary Contacts":"Screw-type terminals","With Type Of Coordination 1 Required":"gG: 630 A (690 V, 100 kA)","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"55 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), 2x (0.75 ... 2.5 mm²)","Number Of Poles For Main Current Circuit":"3","voltage at PLC-control input rated value":"24 V","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","mirror contact according to IEC 60947-4-1":"Yes","Type Of Voltage Of The Control Supply Voltage":"AC/DC","Limited To 1 S Switching At Zero Current Maximum":"7 484 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"7 484 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 10 S Switching At Zero Current Maximum":"5 978 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"3 765 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"2 887 A; Use minimum cross-section acc. to AC-1 rated value","type of PLC-control input according to IEC 60947-1":"Type 2","contact rating of auxiliary contacts according to UL":"A600 / Q600","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","operating range factor of the voltage at PLC-control input":"0.8 ... 1.1","Of Auxiliary Circuit With Degree Of Pollution 3 Rated Value":"500 V","For Short-Circuit Protection Of The Auxiliary Switch Required":"gG: 10 A (500 V, 1 kA)","for short-circuit protection of the RLT relay output required":"miniature fuse: 4 A FF (230 V, Ik= 400 A)","minimum cross-section in main circuit at maximum AC-1 rated value":"370 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/3b81a06ad7d50dc9497d686819070d45.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=459204&mlfb=3RT1076-6PF35"},"ai":{"faq":[{"question":"What wire sizes does the 3RT1076-6PF35 accept?","answer":"Main pole connections accept stranded copper from 70 mm² up to 240 mm². Auxiliary switch terminals accept 2x 0.5-1.5 mm² solid or 2x 0.75-2.5 mm² stranded, max 2x 0.75-4 mm²."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1076-6PF35","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/3RT1076-6PF35 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}}