{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA6120-1AB33","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA6120-1AB33","canonicalUrl":"https://aoctrl.com/siemens/3RA6120-1AB33","factsUrl":"https://aoctrl.com/api/mcp/products/3RA6120-1AB33","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA6120-1AB33 compact starter, direct starter design, 53 kA at 400 V, CLASS 10/20 adjustable, 24 V DC/AC coil, screw and snap-on mounting, 45 mm width.","salesMarkdown":"## Short-circuit rating that sets the panel coordination The 3RA6120-1AB33: This SCCR headroom means the starter can be applied downstream of a high-capacity feeder without requiring a current-limiting upstream device for most industrial distribution systems — the coordination study stays simpler. The adjustable trip class (CLASS 10 and 20) lets the overload relay match the motor start profile: CLASS 10 for high-inertia loads like crushers or conveyors that need a fast trip on stall, CLASS 20 for pumps or fans with longer acceleration times. ## Mounting and wiring for panel density Mounts on standard DIN rail, vertical or horizontal orientation, with screw and snap-on fastening. The 45 mm width and 170 mm height fit a compact footprint — three units side-by-side occupy 135 mm of rail, leaving room for a terminal block row above or below. This covers standard motor feeder cables up to 4 mm² (approx 12 AWG) without needing a ferrule or bootlace — direct screw-clamp termination. ## Environmental tolerance for industrial floors Rated for continuous operation per IEC 60947-6-2, with an operating temperature range of -20 to +60 °C and storage/transport range of -55 to +80 °C. The shock resistance of 60 m/s² (6g) and vibration profile (4–5.8 Hz at 15 mm, 5.8–500 Hz at 20 m/s²) mean it holds up on a machine frame or conveyor line without nuisance trips. Power dissipation is 2.8 W at AC maximum and 2.9 W at DC maximum — low enough that thermal buildup in a sealed enclosure is manageable; no forced cooling required for a single unit, but group derating applies in a multi-starter panel. ## Coil voltage and control compatibility The control coil accepts 24 V AC/DC — a single part number covers both AC and DC control supplies, simplifying BOM management. The 24 V level is standard across most PLC output cards and safety relays, so no interface relay is needed for the control signal.","metaTitle":"Siemens 3RA6120-1AB33 SIRIUS Compact Starter, 53 kA at 400 V","metaDescription":"Siemens 3RA6120-1AB33 SIRIUS compact starter, 53 kA SCCR at 400 V, CLASS 10/20 adjustable trip. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Starters"],"specifications":{"Depth":"165 mm","Solid":"0.5 ... 4 mm², 2x (0.5 ... 2.5 mm²)","Width":"45 mm","at DC":"24 ... 24 V","title":"3RA6120-1AB33","Height":"170 mm","at 400 V":"53 kA","at 50 Hz":"24 ... 24 V","at 60 Hz":"24 V","Trip Class":"CLASS 10 and 20 adjustable","Recommended":"vertical, on horizontal standard DIN rail","description":"SIRIUS Compact load feeder DOL starter 690 V 24 V AC/DC 50...60 Hz 0.1...0.4 A IP20 Connection main circuit: plug-in, without terminals Connection auxiliary circuit: screw terminal","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","at AC maximum":"2.8 W","at DC maximum":"2.9 W","During Storage":"-55 ... +80 °C","number of LEDs":"2","Type Of Voltage":"AC/DC","lifecycle_stage":"current","During Operation":"-20 ... +60 °C","During Transport":"-55 ... +80 °C","Fastening Method":"screw and snap-on mounting","IO-Link protocol":"No","Shock Resistance":"a=60 m/s2 (6g) with 10 ms per 3 shocks in all axes","Mounting Position":"any","at DC rated value":"24 V","Product Brand Name":"SIRIUS","Type Of Assignment":"continous operation according to IEC 60947-6-2","Degree Of Pollution":"3","Product Designation":"compact starter","Vibration Resistance":"f= 4 ... 5.8 Hz, d= 15 mm; f= 5.8 ... 500 Hz, a= 20 m/s²; 10 cycles","at 400 V rated value":"90 W","at 480 V rated value":"0.4 A","at 50 Hz rated value":"24 V","at 500 V rated value":"3 kA","at 60 Hz rated value":"24 V","at 600 V rated value":"0.4 A","at 690 V rated value":"3 kA","AS-Interface protocol":"No","Design Of The Product":"direct starter","For Main Current Circuit":"plug-in without terminals","at AC at 400 V rated value":"0.4 A","NO-Load Switching Frequency":"3 600 1/h","Of The Main Contacts Typical":"10 000 000","at AC in hot operating state":"0.01 W","at AC-3 at 400 V rated value":"0.09 kW","Of Auxiliary Contacts Typical":"10 000 000","Substance Prohibitance (Date)":"05/01/2012","Insulation Voltage Rated Value":"690 V","at AWG cables for main contacts":"2x (16 ... 10), 1x 8","at DC-13 at 6 A at 24 V typical":"30 000","at AC-15 at 6 A at 230 V typical":"200 000","degree of protection NEMA rating":"other","For Auxiliary And Control Circuit":"screw-type terminals","Of The Signaling Contacts Typical":"10 000 000","Between Main And Auxiliary Circuit":"400 V","Design Of Short-Circuit Protection":"electromagnetic","Product Extension Auxiliary Switch":"Yes","Product Function Bus Communication":"No","Relative Humidity During Operation":"10 ... 90 %","Without Load Current Share Typical":"2.9 W","Surge Voltage Resistance Rated Value":"6 000 V","at AWG cables for auxiliary contacts":"2x (20 ... 14)","Between Control And Auxiliary Circuit":"300 V","at AC in hot operating state per pole":"0.01 W","Between Auxiliary And Auxiliary Circuit":"250 V","due to burst according to IEC 61000-4-4":"4 kV main contacts, 2 kV auxiliary contacts","reference code according to IEC 81346-2":"Q","Finely Stranded With Core End Processing":"0.5 ... 2.5 mm², 2x (0.5 ... 1.5 mm²)","Number Of Poles For Main Current Circuit":"3","Formula For Making Capacity Limit Current":"120 x Ie","Product Function Short Circuit Protection":"Yes","Supply voltage required Auxiliary voltage":"No","with low demand rate according to SN 31920":"40 %","Formula For Limit Current Breaking Capacity":"100 x Ie","at AC-41 according to IEC 60947-6-2 maximum":"750 1/h","at AC-43 according to IEC 60947-6-2 maximum":"250 1/h","with high demand rate according to SN 31920":"50 %","number of NC contacts for auxiliary contacts":"1","number of NO contacts for auxiliary contacts":"1","operating voltage at AC-3 rated value maximum":"690 V","electrostatic discharge according to IEC 61000-4-2":"8 kV","contact rating of auxiliary contacts according to UL":"contacts 21-22, 13-14, 43-44 Q600 / A600, contacts 77-78 R300 / B300, contacts 95-96-98 R300 / D300","Product Component Removable Terminal For Main Circuit":"Yes","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","product function control circuit interface with IO link":"No","conducted HF interference emissions according to CISPR11":"150 kHz ... 30 MHz Class A","field-bound HF interference emission according to CISPR11":"30 ... 1000 MHz Class A","operational current of auxiliary contacts at AC-12 maximum":"10 A","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A","Product Function Control Circuit Interface To Parallel Wiring":"Yes","Product Component Removable Terminal For Auxiliary And Control Circuit":"Yes","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"0.1 ... 0.4 A","number of NO contacts of instantaneous short-circuit trip unit for signaling contact":"1","For Short-Circuit Protection Of The Signaling Switch Of The Overload Release Required":"4A gL/gG/400V","number of CO contacts of the current-dependent overload release for signaling contact":"1","For Short-Circuit Protection Of The Signaling Switch Of The Short-Circuit Release Required":"6A gL/gG/400V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/52f015c88d43677e5a0b6af36eeb87e3.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=538971&mlfb=3RA6120-1AB33"},"ai":{"faq":[{"question":"What is the short-circuit breaking capacity of the 3RA6120-1AB33?","answer":"This SCCR covers most industrial panel designs without needing a current-limiting fuse upstream."},{"question":"What compliance documentation does Siemens provide for the 3RA6120-1AB33?","answer":"The part is designed to IEC 60947-6-2 for continuous operation. Standard Siemens documentation includes the declaration of conformity and product certificate; RoHS and REACH compliance is covered by the manufacturer's general product compliance statements. Specific documents are available on request with the RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA6120-1AB33","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/3RA6120-1AB33 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}}