{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA6120-2AP32","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA6120-2AP32","canonicalUrl":"https://aoctrl.com/siemens/3RA6120-2AP32","factsUrl":"https://aoctrl.com/api/mcp/products/3RA6120-2AP32","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA6120-2AP32 compact direct starter, 53 kA breaking capacity at 400 V, 90 W motor rating at 400 V, 110–240 V AC/DC control voltage, adjustable CLASS 10/20, spring-loaded terminals, 45 mm width.","salesMarkdown":"## 53 kA at 400 V — what that means for the panel The 3RA6120-2AP32: In a panel with a transformer-fed bus that delivers 50 kA prospective short-circuit current, this starter clears the fault without needing a current-limiting fuse ahead of it. The unit is a direct starter (non-reversing), rated for continuous operation per IEC 60947-6-2. It handles a 90 W motor load at 400 V, drawing 0.4 A at 400 V AC. ## Trip class and thermal protection — adjustable CLASS 10/20 The overload relay is adjustable between CLASS 10 and CLASS 20. CLASS 10 trips in under 10 seconds at 7.2× FLC — use it for submersible pumps or compressors that need fast lock-rotor protection. CLASS 20 allows a longer start for high-inertia loads like fans or centrifuges. The setting is a simple dial on the front; no swap-out of a separate overload block. Power dissipation is 6 W AC maximum, 5.1 W DC maximum — low enough that several starters can sit side-by-side on the DIN rail without forced cooling, provided ambient stays within -20 to +60 °C during operation. ## Mounting and wiring — DIN rail, spring terminals Any mounting position is allowed, though vertical orientation on the rail is recommended for optimal heat dissipation. No screw torque to check — strip, insert, release. The control circuit uses the same spring-clamp interface. ## Environmental robustness — vibration and shock Vibration resistance tested to 10 cycles at 4–5.8 Hz with 15 mm amplitude, then 5.8–500 Hz at 20 m/s². Shock resistance is 60 m/s² (6 g) with 10 ms half-sine, three shocks per axis. This means the starter holds its settings and contact alignment on a conveyor drive or a compressor skid without nuisance trips. Storage and transport temperature range is -55 to +80 °C — the unit can sit in an unheated warehouse or truck without damage. Pollution degree 3 means it tolerates conductive dust and condensation typical of industrial enclosures.","metaTitle":"Siemens 3RA6120-2AP32 SIRIUS Compact Starter, 53 kA at 400 V","metaDescription":"Siemens 3RA6120-2AP32 SIRIUS compact starter, direct starter design, 53 kA breaking capacity at 400 V, adjustable CLASS 10/20, 90 W motor rating at 400 V","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Starters"],"specifications":{"Depth":"165 mm","Solid":"2x (0.25 ... 1.5 mm²)","Width":"45 mm","at DC":"110 ... 240 V","title":"3RA6120-2AP32","Height":"191 mm","at 400 V":"53 kA","at 50 Hz":"110 ... 240 V","at 60 Hz":"110 ... 240 V","Trip Class":"CLASS 10 and 20 adjustable","Recommended":"vertical, on horizontal standard DIN rail","description":"SIRIUS Compact load feeder DOL starter 690 V 110...240 V AC/DC 50...60 Hz 0.1...0.4 A IP20 Connection main circuit: Spring-type terminal Connection auxiliary circuit: Spring-type terminal","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","at AC maximum":"6 W","at DC maximum":"5.1 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":"240 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":"240 V","at 500 V rated value":"3 kA","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":"spring-loaded 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 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":"spring-loaded 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":"6 W","Surge Voltage Resistance Rated Value":"6 000 V","Between Control And Auxiliary Circuit":"300 V","at AC in hot operating state per pole":"0.01 W","for AWG cables for auxiliary contacts":"2x (24 ... 16)","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":"2x (0.25 ... 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 %","Finely Stranded Without Core End Processing":"2x (0.25 ... 1.5 mm²)","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/b04d3926c4c557cabc5f2b819a080da6.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=298656&mlfb=3RA6120-2AP32"},"ai":{"faq":[{"question":"What is the breaking capacity of 3RA6120-2AP32 at 400 V?","answer":"The breaking capacity is 53 kA at 400 V. This is the maximum short-circuit current the starter can interrupt at that voltage level without damage."},{"question":"What control voltage does 3RA6120-2AP32 accept?","answer":"The coil is universal — no jumper or tap change needed when switching between AC and DC control circuits."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA6120-2AP32","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/3RA6120-2AP32 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}}