{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA6500-2DB42","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA6500-2DB42","canonicalUrl":"https://aoctrl.com/siemens/3RA6500-2DB42","factsUrl":"https://aoctrl.com/api/mcp/products/3RA6500-2DB42","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA6500-2DB42 compact reversing starter, 12 A at 400 V AC, 53 kA breaking capacity, adjustable trip class 10/20, spring-loaded terminals, 24 V DC coil, IO-Link COM2, 90 x 191 x 165 mm.","salesMarkdown":"## Reversing starter for motor control panels The Siemens 3RA6500-2DB42 is a SIRIUS compact reversing starter designed for continuous motor duty per IEC 60947-6-2. It combines a contactor and overload relay in one housing, with the reversing pair built in — so you get forward/reverse control without wiring two separate contactors and an interlock. The 53 kA SCCR means it can sit downstream of a high-capacity feeder without needing a current-limiting upstream device — useful when you're coordinating a panel with multiple motor branches. ## Trip class and thermal protection — adjustable for the load The overload relay is adjustable between trip class 10 and 20. Class 10 is the standard for most general-purpose motors — it trips fast enough to protect the winding during a stall. Class 20 gives a longer thermal memory, which matters for high-inertia loads like fans or centrifuges that take several seconds to spin up. You set it with a switch on the front; no need to swap heater packs. The continuous operation rating (IEC 60947-6-2) means the starter is rated for uninterrupted motor running, not just intermittent jogging. The no-load switching frequency of 3,600 operations per hour tells you the mechanical life is generous for a reversing starter — it can handle frequent direction changes in conveyor or shuttle applications. ## Wiring and mounting — spring terminals, DIN rail The main current circuit uses spring-loaded terminals — push-in for solid or ferruled stranded wire, 2x 0.25 to 1.5 mm² per clamp. No screw torque to check, no vibration loosening. The control circuit is 24 V DC, which is the standard for modern PLC-driven panels. Mounting is screw-and-snap-on to a standard DIN rail. The footprint is 90 mm wide, 191 mm tall, 165 mm deep — about four module widths on a 35 mm rail. Mounting position is any, but the recommended orientation is vertical on a horizontal rail for best heat dissipation from the overload element. ## IO-Link communication and diagnostics This starter supports IO-Link protocol at COM2 (38.4 kBaud). That gives you access to five status LEDs plus process data — load current, trip count, thermal capacity used — over a standard M12 connection. For a commissioning engineer, this means you can verify motor current and overload status from the PLC without climbing into the panel. The 24 V DC control supply powers both the coil and the IO-Link interface. Power dissipation at DC is 2.9 W maximum — negligible for panel thermal budgeting, but worth noting if you're running a dozen of these in a sealed enclosure. ## Environmental endurance — shock, vibration, temperature Rated for shock resistance of 60 m/s² (6g) with 10 ms pulses, three shocks per axis. Vibration resistance is 15 mm displacement at 4–5.8 Hz, then 20 m/s² acceleration at 5.8–500 Hz, 10 cycles. That puts it in the range for machine-mounted applications — conveyors, pumps, compressors — where the starter sees the machine's vibration, not just the panel floor. Operating temperature range is -20 to +60 °C; storage and transport range is -55 to +80 °C. Pollution degree 3 means it's rated for conductive pollution in industrial environments — no special coating needed for most factory floors.","metaTitle":"Siemens 3RA6500-2DB42 SIRIUS Compact Reversing Starter, 12 A","metaDescription":"Siemens 3RA6500-2DB42 SIRIUS compact reversing starter, 12 A rated at 400 V AC, 53 kA breaking capacity. IO-Link enabled, adjustable trip class 10/20.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Starters"],"specifications":{"Depth":"165 mm","Solid":"2x (0.25 ... 1.5 mm²)","Width":"90 mm","at DC":"24 ... 24 V","title":"3RA6500-2DB42","Height":"191 mm","at 400 V":"53 kA","Trip Class":"CLASS 10 and 20 adjustable","Recommended":"vertical, on horizontal standard mounting rail","description":"SIRIUS Compact load feeder Reversing starter for IO-Link 690 V 24 V DC 3...12 A IP20 Connection main circuit: Spring-type terminal Connection control circuit: Spring-type terminal","at DC maximum":"2.9 W","During Storage":"-55 ... +80 °C","number of LEDs":"5","Type Of Voltage":"DC","lifecycle_stage":"current","During Operation":"-20 ... +60 °C","During Transport":"-55 ... +80 °C","Fastening Method":"screw and snap-on mounting","IO-Link protocol":"Yes","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 for IO-Link","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":"5 500 W","at 480 V rated value":"12 A","at 500 V rated value":"3 kA","at 600 V rated value":"12 A","at 690 V rated value":"3 kA","AS-Interface protocol":"No","Design Of The Product":"reversing starter","IO-Link transfer rate":"COM2 (38,4 kBaud)","For Main Current Circuit":"spring-loaded terminals","at 200/208 V rated value":"3 hp","at 220/230 V rated value":"3 hp","at 460/480 V rated value":"7.5 hp","at 575/600 V rated value":"10 hp","at AC at 400 V rated value":"12 A","NO-Load Switching Frequency":"3 600 1/h","Of The Main Contacts Typical":"10 000 000","at AC in hot operating state":"1.8 W","at AC-3 at 400 V rated value":"5.5 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":"spring-loaded terminals","Of The Signaling Contacts Typical":"10 000 000","Design Of Short-Circuit Protection":"electromagnetic","Product Extension Auxiliary Switch":"Yes","Product Function Bus Communication":"Yes","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 (24 ... 16)","at AC in hot operating state per pole":"0.6 W","due to burst according to IEC 61000-4-4":"4 kV main circuits, 2 kV auxiliary circuits, 2 kV IO-Link, 2 kV limit switches, 2 kV line hand-held device","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":"12 x Ie","Product Function Short Circuit Protection":"Yes","Supply voltage required Auxiliary voltage":"Yes","Finely Stranded Without Core End Processing":"2x (0.25 ... 1.5 mm²)","Formula For Breaking Capacity Limit Current":"10 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":"0","number of NO contacts for auxiliary contacts":"0","operating voltage at AC-3 rated value maximum":"690 V","electrostatic discharge according to IEC 61000-4-2":"8 kV","Type Of Voltage Supply Via Input/Output Link Master":"No","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":"Yes","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":"No","Of The Address Range Of The Inputs With Cyclical Transfer Total":"2 byte","Of The Address Range Of The Outputs With Cyclical Transfer Total":"2 byte","Display Version As Status Display Of The Input/Output Link Device":"green/red dual LED","point-to-point cycle time between master and IO-Link device minimum":"2.5 ms","Product Component Removable Terminal For Auxiliary And Control Circuit":"Yes","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"3 ... 12 A","number of NO contacts of instantaneous short-circuit trip unit for signaling contact":"0","number of CO contacts of the current-dependent overload release for signaling contact":"0"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ca30bde71119a188656a46981f6d7394.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=485766&mlfb=3RA6500-2DB42"},"ai":{"faq":[{"question":"Where can I buy the 3RA6500-2DB42 and get a price?","answer":"This part is available through independent industrial automation distribution. Submit an RFQ for a firm quote with lead time."},{"question":"What is the breaking capacity of the 3RA6500-2DB42?","answer":"The breaking capacity is 53 kA at 400 V. This is the short-circuit current the starter can safely interrupt at that voltage level."},{"question":"What wire sizes fit the spring terminals on the 3RA6500-2DB42?","answer":"The spring-loaded terminals accept solid or ferruled stranded wire: 2x 0.25 to 1.5 mm² per clamp. Push-in for solid wire; use a screwdriver to open the cage for stranded without ferrules."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA6500-2DB42","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/3RA6500-2DB42 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}}