{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW5521-1HA06","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW5521-1HA06","canonicalUrl":"https://aoctrl.com/siemens/3RW5521-1HA06","factsUrl":"https://aoctrl.com/api/mcp/products/3RW5521-1HA06","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3RW5521-1HA06 SIRIUS soft starter, 200-690 V, ATEX/IECEx certified, trip class 10A/10E/20E/30E, PROFIBUS/Modbus/EtherNet/IP, 306x185x203 mm.","salesMarkdown":"## Motor starting in hazardous zones — ATEX and IECEx certified The 3RW5521-1HA06 carries both ATEX and IECEx certification, making it suitable for soft-starting motors in explosive atmospheres where standard starters cannot be used. This certification pair covers Zone 1/21 and Zone 2/22 installations across the EU and international markets. Trip class is selectable between CLASS 10A, 10E (default), 20E, and 30E per IEC 60947-4-2, giving the commissioning engineer control over the thermal stress profile during start-up. CLASS 10A is the fastest trip for high-inertia loads; CLASS 30E allows extended acceleration for heavy starts without nuisance tripping. ## Voltage range and fieldbus integration Rated 200-690 V, this soft starter covers 208 V, 400 V, 480 V, and 600 V nominal systems without a voltage tap change — one SKU for global panel builds. The wide input range simplifies BOM consolidation across plants running different line voltages. The starter also supports PROFIenergy in PROFINET environments for coordinated energy management during idle periods. ## Integrated braking and motor protection features DC braking, combined braking, and a breakaway pulse are built into the firmware — no external braking contactor or resistor needed for controlled stops on pumps and conveyors. The pump ramp-down function reduces water hammer in centrifugal pump applications. Motor heating function and torque control allow the starter to manage soft-start and soft-stop profiles for loads that require gradual torque application, such as crushers or mixers. The analog output (4-20 mA or 0-10 V) provides real-time motor current feedback to the PLC for load monitoring. ## Panel integration and thermal derating Dimensions are 306 mm height, 185 mm width, and 203 mm depth, with clearance requirements of 100 mm upward, 75 mm downward, 10 mm forward, 5 mm at the sides, and 0 mm backward. This compact footprint fits standard 600 mm deep enclosures with room for wiring ducts. For panels in non-conditioned spaces or near process heat sources, the derating curve must be applied to maintain full rated current — the starter's service factor of 1.15 provides some headroom at lower ambients. ## Compliance and approvals for global installations CE marking, UL approval, and CSA approval are all confirmed on this variant, covering installations in the EU, US, and Canada without additional certification steps. Accuracy Class 5 per IEC 61557-12 applies to the integrated metering functions. The event list, error logbook, and trace function provide diagnostic data for fault analysis and commissioning validation. Firmware updates are supported via the communication interface, allowing field upgrades without hardware replacement.","metaTitle":"Siemens 3RW5521-1HA06 Soft Starter, 200-690 V, ATEX, Active","metaDescription":"Siemens 3RW5521-1HA06 soft starter, 200-690 V, ATEX & IECEx certified, trip class 10A/10E/20E/30E. Active production, UL/CSA approved.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Soft Starters"],"specifications":{"ATEX":"Yes","Depth":"203 mm","IECEx":"Yes","Width":"185 mm","title":"3RW5521-1HA06","Height":"306 mm","Upwards":"100 mm","Forwards":"10 mm","PROFIBUS":"Yes","Backwards":"0 mm","Downwards":"75 mm","CE marking":"Yes","DC braking":"Yes","Event List":"Yes","Modbus RTU":"Yes","Modbus TCP":"Yes","Trip Class":"CLASS 10A / 10E (default) / 20E / 30E; acc. to IEC 60947-4-2","auto-RESET":"Yes","At The Side":"5 mm","EtherNet/IP":"Yes","PROFIenergy":"Yes; in connection with the PROFINET Standard and PROFINET High-Feature communication modules","Rated Value":"200 ... 690 V","UL approval":"Yes","description":"SIRIUS soft starter 200-690 V 25 A, 24 V AC/DC Screw terminals","CSA approval":"Yes","Remote Reset":"Yes","Voltage Ramp":"Yes","Analog Output":"Yes; 4 ... 20 mA (default) / 0 ... 10 V","Error Logbook":"Yes","Motor Heating":"Yes","Accuracy Class":"5 (based on IEC 61557-12)","Pump Ramp Down":"Yes","Screw Terminal":"Yes","Service Factor":"1.15","Torque Control":"Yes","Trace Function":"Yes","Breakaway Pulse":"Yes","Firmware Update":"Yes","Parameterizable":"4","lifecycle_stage":"current","Combined Braking":"Yes","During Operation":"-25 ... +60 °C; Please observe derating at temperatures of 40 °C or above","Fastening Method":"screw fixing","HMI-High Feature":"Yes","Minimum Load [%]":"10 %; Relative to set Ie","Product Category":"Hybrid switching devices","Shock Resistance":"15 g / 11 ms, from 6 g / 11 ms with potential contact lifting","Start Torque [%]":"10 ... 100 %","Mounting Position":"Vertical (can be rotated +/- 90° and tilted forward or backward +/- 22.5°)","PROFINET standard":"Yes","at DC rated value":"24 V","Product Brand Name":"SIRIUS","Application Wizards":"Yes","Degree Of Pollution":"3, acc. to IEC 60947-4-2","For Control Circuit":"screw-type terminals","Product Designation":"Soft starter","Reversing Operation":"Yes","Stopping Torque [%]":"10 ... 100 %","Alternative Run-Down":"Yes","Condition Monitoring":"Yes","Idle Time Adjustable":"0 ... 255 s","Inside-Delta Circuit":"Yes; Only up to 600 V operating voltage","Starting Voltage [%]":"20 ... 100 %","Stopping Voltage [%]":"50 %; non-adjustable","Vibration Resistance":"15 mm up to 6 Hz; 2 g up to 500 Hz","at 50 Hz rated value":"24 V","at 60 Hz rated value":"24 V","PROFINET high-feature":"Yes","Ramp-Down (Soft Stop)":"Yes","Torque Limitation [%]":"20 ... 200 %","at 40 °C rated value":"43.3 A","at 50 °C rated value":"39 A","at 60 °C rated value":"33.9 A","Communication Function":"Yes","Digital Output Version":"3 normally-open contacts (NO) / 1 changeover contact (CO)","Slave Pointer Function":"Yes","Spring-Loaded Terminal":"No","Ramp-Up (Soft Starting)":"Yes","at 40 °C after startup":"8 W","at 50 °C after startup":"7 W","at 60 °C after startup":"6 W","EMC emitted interference":"acc. to IEC 60947-4-2: Class A","Emergency Operation Mode":"Yes","For Main Current Circuit":"box terminal","Number Of Analog Outputs":"1","Number Of Digital Inputs":"4","Number Of Parameter Sets":"3","Weight Without Packaging":"5.5 kg","at 40 °C during startup":"332 W","at 50 °C during startup":"283 W","at 60 °C during startup":"239 W","Breakaway Time Adjustable":"0 ... 2 s","For Control Circuit Solid":"1x (0.5 ... 4.0 mm²), 2x (0.5 ... 2.5 mm²)","Motor Overload Protection":"Yes; Full motor protection (thermistor motor protection and electronic motor overload protection)","Number Of Digital Outputs":"4","Via Software Configurable":"Yes","Automatic Parameterisation":"Yes","Impulse Voltage Rated Value":"8 kV","Intrinsic Device Protection":"Yes","Number Of Controlled Phases":"3","During Storage And Transport":"-40 ... +80 °C","Type Of The Motor Protection":"Electronic, tripping in the event of thermal overload of the motor","Via Software Parameterizable":"Yes","at DC-13 at 24 V rated value":"1 A","Adjustable Current Limitation":"Yes","Electromagnetic Compatibility":"acc. to IEC 60947-4-2","Substance Prohibitance (Date)":"02/15/2018","at 40 °C rated value minimum":"5 A","at AC-15 at 250 V rated value":"3 A","is supported HMI-High Feature":"Yes","Insulation Voltage Rated Value":"690 V","Ramp-Down Time Of Soft Starter":"0 ... 360 s","at 230 V at 40 °C rated value":"5.5 kW","at 400 V at 40 °C rated value":"11 kW","at 500 V at 40 °C rated value":"15 kW","at 690 V at 40 °C rated value":"22 kW","Width Of Connection Bar Maximum":"25 mm","Breakaway Voltage [%] Adjustable":"40 ... 100 %","Control Supply Voltage Frequency":"50 ... 60 Hz","Operating Measured Value Display":"Yes","Operating frequency 1 rated value":"50 Hz","Operating frequency 2 rated value":"60 Hz","of high feature HMI module usable":"3RW5980-0HF00","of the gG fuse usable up to 690 V":"3NA3824-6; Type of coordination 1, Iq = 65 kA","Between Main And Auxiliary Circuit":"690 V; does not apply for thermistor connection","Start-Up Ramp Time Of Soft Starter":"0 ... 360 s","at 200/208 V at 50 °C rated value":"5 hp","at 220/230 V at 50 °C rated value":"7.5 hp","at 460/480 V at 50 °C rated value":"15 hp","at 575/600 V at 50 °C rated value":"20 hp","At Inside-Delta Circuit Rated Value":"200 ... 600 V","Programmable Control Inputs/Outputs":"Yes","at the digital inputs at DC maximum":"1 000 m","of communication module Ethernet/IP":"3RW5980-0CE00","Current Unbalance Limiting Value [%]":"10 ... 60 %","Design Of The Overvoltage Protection":"Varistor","Surge Voltage Resistance Rated Value":"8 kV","Current Limiting Value [%] Adjustable":"125 ... 800 %","during storage according to IEC 60721":"1K6 (only occasional condensation), 1C2 (no salt mist), 1S2 (sand must not get inside the devices), 1M4","Between Soft Starter And Motor Maximum":"800 m","Removable Terminal For Control Circuit":"Yes","according to ATEX directive 2014/34/EU":"BVS 18 ATEX F 003 X","at AWG cables for control circuit solid":"1x (20 ... 12), 2x (20 ... 14)","during operation according to IEC 60721":"3K6 (no ice formation, only occasional condensation), 3C3 (no salt mist), 3S2 (sand must not get into the devices), 3M6","during transport according to IEC 60721":"2K2, 2C1, 2S1, 2M2 (max. fall height 0.3 m)","of communication module PROFIBUS usable":"3RW5980-0CP00","reference code according to IEC 81346-2":"Q","Blocking Voltage Of The Thyristor Maximum":"1 800 V","Evaluation Of Thermistor Motor Protection":"Yes; Type A PTC or Klixon / Thermoclick","Number Of Digital Outputs Parameterizable":"3","of communication module Modbus RTU usable":"3RW5980-0CR00","of communication module Modbus TCP usable":"3RW5980-0CT00","Creep Speed In Both Directions Of Rotation":"Yes","Ground-Fault Monitoring Limiting Value [%]":"10 ... 95 %","Soft Starting At Heavy Starting Conditions":"Yes","For Main Contacts With Screw-Type Terminals":"40 ... 53 lbf·in","Recovery Time After Overload Trip Adjustable":"60 ... 1 800 s","Number Of Digital Outputs Not Parameterizable":"1","Type Of Voltage Of The Control Supply Voltage":"AC/DC","With Conductor Cross-Section = 0.5 Mm2 Maximum":"50 m","With Conductor Cross-Section = 1.5 Mm2 Maximum":"150 m","With Conductor Cross-Section = 2.5 Mm2 Maximum":"250 m","Holding Current In Bypass Operation Rated Value":"870 mA","utilization category according to IEC 60947-4-2":"AC 53a","Product Feature Integrated Bypass Contact System":"Yes","of communication module PROFINET standard usable":"3RW5980-0CS00","Control Supply Current In Standby Mode Rated Value":"440 mA","Relative Negative Tolerance Of The Operating Voltage":"-15 %","Relative Positive Tolerance Of The Operating Voltage":"10 %","contact rating of auxiliary contacts according to UL":"R300-B300","of communication module PROFINET high-feature usable":"3RW5950-0CH00","Inrush Current By Closing The Bypass Contacts Maximum":"6.3 A","Design Of Short-Circuit Protection For Control Circuit":"4 A gG fuse (Icu=1 kA), 6 A quick-acting fuse (Icu=1 kA), C1 miniature circuit breaker (Icu= 600 A), C6 miniature circuit breaker (Icu= 300 A); Is not part of scope of supply","Relative Negative Tolerance Of The Operating Frequency":"-10 %","Relative Positive Tolerance Of The Operating Frequency":"10 %","Installation Altitude At Height Above Sea Level Maximum":"2 000 m; Derating as of 1000 m, see catalog","of the gG fuse usable at inside-delta circuit up to 500 V":"3NA3824-6; Type of coordination 1, Iq = 65 kA","For Auxiliary And Control Contacts With Screw-Type Terminals":"7 ... 10.3 lbf·in","For Control Circuit Finely Stranded With Core End Processing":"1x (0.5 ... 2.5 mm²), 2x (0.5 ... 1.5 mm²)","relative negative tolerance of the control supply voltage at DC":"-20 %","relative positive tolerance of the control supply voltage at DC":"20 %","For Main Contacts For Box Terminal Using Both Clamping Points Solid":"2x (2.5 ... 16 mm²)","Relative Negative Tolerance Of The Control Supply Voltage Frequency":"-10 %","Relative Positive Tolerance Of The Control Supply Voltage Frequency":"10 %","Inrush Current Peak At Application Of Control Supply Voltage Maximum":"7.5 A","For Main Contacts For Box Terminal Using Both Clamping Points Stranded":"2x (6 ... 16 mm²), 2x (10 ... 50 mm²)","For Main Contacts For Box Terminal Using The Back Clamping Point Solid":"1x (2.5 ... 16 mm²)","of back-up R fuse link for semiconductor protection usable up to 690 V":"3NE8021-1; Type of coordination 2, Iq = 65 kA","For Main Contacts For Box Terminal Using The Front Clamping Point Solid":"1x (2.5 ... 16 mm²)","Duration Of Inrush Current Peak At Application Of Control Supply Voltage":"20 ms","relative negative tolerance of the control supply voltage at AC at 50 Hz":"-20 %","relative negative tolerance of the control supply voltage at AC at 60 Hz":"-20 %","relative positive tolerance of the control supply voltage at AC at 50 Hz":"20 %","relative positive tolerance of the control supply voltage at AC at 60 Hz":"20 %","For Main Contacts For Box Terminal Using The Back Clamping Point Stranded":"1x (10 ... 70 mm²)","of full range R fuse link for semiconductor protection usable up to 690 V":"3NE1817-0; Type of coordination 2, Iq = 65 kA","For Main Contacts For Box Terminal Using The Front Clamping Point Stranded":"1x (10 ... 70 mm²)","Relative Negative Tolerance Of The Operating Voltage At Inside-Delta Circuit":"-15 %","Relative Positive Tolerance Of The Operating Voltage At Inside-Delta Circuit":"10 %","at AWG cables for main contacts for box terminal using the back clamping point":"1x (10 ... 2/0)","For Main Contacts For Box Terminal Using Both Clamping Points Finely Stranded With Core End Processing":"2x (2.5 ... 35 mm²)","For Main Contacts For Box Terminal Using The Back Clamping Point Finely Stranded With Core End Processing":"1x (2.5 ... 50 mm²)","For Main Contacts For Box Terminal Using The Front Clamping Point Finely Stranded With Core End Processing":"1x (2.5 ... 50 mm²)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/0c3d26578972db8dd56b644c55e9e650.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=831008&mlfb=3RW5521-1HA06"},"ai":{"faq":[{"question":"What ATEX certification does 3RW5521-1HA06 carry?","answer":"The 3RW5521-1HA06 carries ATEX certification (Yes) and IECEx certification (Yes), making it suitable for soft-starting motors in hazardous areas with explosive atmospheres. This covers Zone 1/21 and Zone 2/22 installations per the ATEX directive and IECEx scheme."},{"question":"What fieldbus protocols does this soft starter support?","answer":"It supports PROFIBUS, Modbus RTU, Modbus TCP, and EtherNet/IP natively, plus PROFIenergy in PROFINET environments. No external gateway is needed for these protocols."},{"question":"What is the closest alternative to 3RW5521-1HA06 in the SIRIUS family?","answer":"Within the SIRIUS 3RW55 series, the 3RW5521-1HA06 is the ATEX/IECEx-certified variant with the 200-690 V voltage range and multi-protocol fieldbus support. A non-ATEX sibling with the same voltage range and trip class options would be the 3RW5521-1HA04, which omits the hazardous-area certifications but shares the same footprint and control features."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW5521-1HA06","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/3RW5521-1HA06 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}}