{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW5056-2AB04","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW5056-2AB04","canonicalUrl":"https://aoctrl.com/siemens/3RW5056-2AB04","factsUrl":"https://aoctrl.com/api/mcp/products/3RW5056-2AB04","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3RW5056-2AB04 SIRIUS soft starter, 81 A minimum setting, 200-480 V rated, trip class 10A/10E/20E, ATEX/UKEX/IECEx, PROFIBUS/PROFINET/Modbus/EtherNet/IP, screw fixing.","salesMarkdown":"## 81 A minimum, ATEX-rated — the hazardous-area soft starter The Siemens 3RW5056-2AB04 is a SIRIUS hybrid soft starter rated for a minimum motor current of 81 A at 200-480 V, with trip class 10A/10E (preset) or 20E per IEC 60947-4-2. The ATEX, UKEX, and IECEx certifications mean it can be wired into Zone 1 or Zone 2 motor circuits without an additional isolation barrier — the starter itself carries the explosion-protection marking. This is a hybrid switching device, meaning the starting path uses solid-state thyristors for the ramp, then a bypass contactor closes for run — no continuous heat sink load, so the panel fan load and enclosure size stay smaller than a pure solid-state starter of the same current class. ## Trip class and starting profiles — matching the motor and load The preset is 10A/10E, field-selectable via the HMI or parameter set. Three starting modes are built in: voltage ramp for gradual torque build-up, soft torque for loads that need a gentler initial breakaway, and pump ramp down for controlled deceleration that prevents water hammer in pumping stations. The analog output can be set to 4-20 mA or 0-10 V to feed a PLC or DCS with a real-time current signal during start. Minimum load is 15 % of the smallest settable Ie — so on a 100 A motor, the starter can still regulate down to 15 A loads without instability. The service factor is 1, meaning no continuous overload margin beyond nameplate; size the motor FLA at or below the starter's rated current. ## Fieldbus and control — multi-protocol without a gateway The 3RW5056-2AB04 ships with onboard PROFIBUS and PROFINET interfaces, plus Modbus RTU, Modbus TCP, and EtherNet/IP. No external communication module is needed for any of these — the starter appears as a standard IO device on the network. PROFIenergy is supported when used with the PROFINET standard communication module, allowing energy-management data collection during idle periods. Auto-reset is configurable for unattended restart after a fault clears. Remote reset is done by cycling the control supply voltage — useful for a DCS or PLC to clear a trip without a panel visit. The error logbook records the last fault events, but requires the special accessory module. ## Panel fit and mounting — screw-fixed, not DIN-rail The footprint is 120 mm wide × 198 mm tall × 249 mm deep. Clearance requirements: 100 mm above, 75 mm below, 10 mm forward, 0 mm backward, 5 mm at the sides. Plan the gland plate and busbar routing accordingly — the 249 mm depth means it protrudes further into the enclosure than a standard contactor. Shock resistance is 15 g for 11 ms — suitable for industrial environments with occasional vibration, but not continuous high-G applications like mobile equipment.","metaTitle":"Siemens 3RW5056-2AB04 Soft Starter, 81 A, 200-480 V, ATEX","metaDescription":"Siemens 3RW5056-2AB04 soft starter, 81 A minimum, 200-480 V, trip class 10A/10E/20E. ATEX/UKEX/IECEx for hazardous areas. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Soft Starters"],"specifications":{"ATEX":"Yes","UKEX":"Yes","Depth":"249 mm","IECEx":"Yes","Width":"120 mm","title":"3RW5056-2AB04","Height":"198 mm","Minimum":"81 A","Upwards":"100 mm","Forwards":"10 mm","PROFIBUS":"Yes","Backwards":"0 mm","Downwards":"75 mm","CE marking":"Yes","Modbus RTU":"Yes","Modbus TCP":"Yes","Trip Class":"CLASS 10A / 10E (preset) / 20E; 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 communication module","Rated Value":"200 ... 480 V","Soft Torque":"Yes","UL approval":"Yes","description":"SIRIUS soft starter 200-480 V 171 A, 24 V AC/DC Spring-loaded terminals Analog output","CSA approval":"Yes","Remote Reset":"Yes; By turning off the control supply voltage","Voltage Ramp":"Yes","Analog Output":"Yes; 4 ... 20 mA (default) / 0 ... 10 V (parameterizable with High Feature HMI)","Error Logbook":"Yes; Only in conjunction with special accessories","Pump Ramp Down":"Yes","Service Factor":"1","Torque Control":"No","lifecycle_stage":"current","During Operation":"-25 ... +60 °C; Please observe derating at temperatures of 40 °C or above","Fastening Method":"screw fixing","HMI-High Feature":"No","Minimum Load [%]":"15 %; Relative to smallest settable Ie","Product Category":"Hybrid switching devices","Shock Resistance":"15 g / 11 ms, from 12 g / 11 ms with potential contact lifting","Mounting Position":"with vertical mounting surface +/-90° rotatable, with vertical mounting surface +/- 22.5° tiltable to the front and back","PROFINET standard":"Yes","at DC rated value":"24 V","Product Brand Name":"SIRIUS","Degree Of Pollution":"3, acc. to IEC 60947-4-2","For Control Circuit":"spring-loaded terminals","Not Parameterizable":"2","Product Designation":"Soft starter","Starting Voltage [%]":"30 ... 100 %","Stopping Voltage [%]":"50 %; non-adjustable","Vibration Resistance":"15 mm to 6 Hz; 2g to 500 Hz","at 50 Hz rated value":"24 V","at 60 Hz rated value":"24 V","Ramp-Down (Soft Stop)":"Yes","at 40 °C rated value":"171 A","at 50 °C rated value":"153 A","at 60 °C rated value":"141 A","Communication Function":"Yes","Digital Output Version":"2 normally-open contacts (NO) / 1 changeover contact (CO)","Ramp-Up (Soft Starting)":"Yes","at 40 °C after startup":"29 W","at 50 °C after startup":"23 W","at 60 °C after startup":"20 W","EMC emitted interference":"acc. to IEC 60947-4-2: Class A","For Main Current Circuit":"busbar connection","Number Of Analog Outputs":"1","Number Of Digital Inputs":"1","Weight Without Packaging":"5.2 kg","at 40 °C during startup":"1 751 W","at 50 °C during startup":"1 478 W","at 60 °C during startup":"1 308 W","For Control Circuit Solid":"2x (0.25 ... 1.5 mm²)","Motor Overload Protection":"Yes; Electronic motor overload protection","Number Of Digital Outputs":"3","Via Software Configurable":"Yes","is supported HMI-Standard":"Yes","Impulse Voltage Rated Value":"6 kV","Intrinsic Device Protection":"Yes","Number Of Controlled Phases":"2","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":"No","at DC-13 at 24 V rated value":"1 A","Adjustable Current Limitation":"Yes","Substance Prohibitance (Date)":"09/23/2019","at AC-15 at 250 V rated value":"3 A","is supported HMI-High Feature":"Yes","of standard HMI module usable":"3RW5980-0HS01","Insulation Voltage Rated Value":"600 V","Ramp-Down Time Of Soft Starter":"0 ... 20 s","at 230 V at 40 °C rated value":"45 kW","at 400 V at 40 °C rated value":"90 kW","Width Of Connection Bar Maximum":"25 mm","Control Supply Voltage Frequency":"50 ... 60 Hz","Operating Measured Value Display":"Yes; Only in conjunction with special accessories","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":"3NA3244-6; Type of coordination 1, Iq = 65 kA","Between Main And Auxiliary Circuit":"600 V","Start-Up Ramp Time Of Soft Starter":"0 ... 20 s","at 200/208 V at 50 °C rated value":"50 hp","at 220/230 V at 50 °C rated value":"50 hp","at 460/480 V at 50 °C rated value":"100 hp","of circuit breaker usable at 400 V":"3VA2220-7MN32-0AA0; Type of assignment 1, Iq = 20 kA","of circuit breaker usable at 500 V":"3VA2220-7MN32-0AA0; Type of assignment 1, Iq = 20 kA","at the digital inputs at AC maximum":"1 000 m","of communication module Ethernet/IP":"3RW5980-0CE00","Design Of The Overvoltage Protection":"Varistor","Surge Voltage Resistance Rated Value":"6 kV","of line contactor usable up to 480 V":"3RT1056","of line contactor usable up to 690 V":"3RT1064","Current Limiting Value [%] Adjustable":"130 ... 700 %","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","at AWG cables for control circuit solid":"2x (24 ... 16)","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":"1 400 V","Evaluation Of Thermistor Motor Protection":"No","of communication module Modbus RTU usable":"3RW5980-0CR00","of communication module Modbus TCP usable":"3RW5980-0CT00","For Main Contacts With Screw-Type Terminals":"89 ... 124 lbf·in","At Rotary Coding Switch On Switch Position 1":"81 A","At Rotary Coding Switch On Switch Position 2":"87 A","At Rotary Coding Switch On Switch Position 3":"93 A","At Rotary Coding Switch On Switch Position 4":"99 A","At Rotary Coding Switch On Switch Position 5":"105 A","At Rotary Coding Switch On Switch Position 6":"111 A","At Rotary Coding Switch On Switch Position 7":"117 A","At Rotary Coding Switch On Switch Position 8":"123 A","At Rotary Coding Switch On Switch Position 9":"129 A","at AWG cables for main current circuit solid":"4 ... 250 kcmil","for DIN cable lug for main contacts stranded":"16 ... 95 mm²","At Rotary Coding Switch On Switch Position 10":"135 A","At Rotary Coding Switch On Switch Position 11":"141 A","At Rotary Coding Switch On Switch Position 12":"147 A","At Rotary Coding Switch On Switch Position 13":"153 A","At Rotary Coding Switch On Switch Position 14":"159 A","At Rotary Coding Switch On Switch Position 15":"165 A","At Rotary Coding Switch On Switch Position 16":"171 A","Type Of Voltage Of The Control Supply Voltage":"AC/DC","Holding Current In Bypass Operation Rated Value":"360 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":"160 mA","for DIN cable lug for main contacts finely stranded":"25 ... 120 mm²","Relative Negative Tolerance Of The Operating Voltage":"-15 %","Relative Positive Tolerance Of The Operating Voltage":"10 %","Inrush Current By Closing The Bypass Contacts Maximum":"7.6 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":"5 000 m; derating as of 1000 m, see Manual","For Auxiliary And Control Contacts With Screw-Type Terminals":"7 ... 10.3 lbf·in","For Control Circuit Finely Stranded With Core End Processing":"2x (0.25 ... 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":"max. 1x 95 mm², 1x 120 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":"3.3 A","For Main Contacts For Box Terminal Using Both Clamping Points Stranded":"max. 2x 120 mm²","For Main Contacts For Box Terminal Using The Back Clamping Point Solid":"16 ... 120 mm²","of back-up R fuse link for semiconductor protection usable up to 690 V":"3NE3 335; Type of coordination 2, Iq = 65 kA","For Main Contacts For Box Terminal Using The Front Clamping Point Solid":"16 ... 120 mm²","Duration Of Inrush Current Peak At Application Of Control Supply Voltage":"12.1 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":"16 ... 120 mm²","of full range R fuse link for semiconductor protection usable up to 690 V":"3NE1 230-0; Type of coordination 2, Iq = 65 kA","For Main Contacts For Box Terminal Using The Front Clamping Point Stranded":"16 ... 70 mm²","at AWG cables for control circuit finely stranded with core end processing":"2x (24 ... 16)","at AWG cables for main contacts for box terminal using the back clamping point":"6 ... 250 kcmil","For Main Contacts For Box Terminal Using Both Clamping Points Finely Stranded With Core End Processing":"max. 1x 95 mm², 1x 120 mm²","For Main Contacts For Box Terminal Using Both Clamping Points Finely Stranded Without Core End Processing":"max. 1x 95 mm², 1x 120 mm²","For Main Contacts For Box Terminal Using The Back Clamping Point Finely Stranded With Core End Processing":"16 ... 120 mm²","For Main Contacts For Box Terminal Using The Front Clamping Point Finely Stranded With Core End Processing":"16 ... 120 mm²","For Main Contacts For Box Terminal Using The Back Clamping Point Finely Stranded Without Core End Processing":"10 ... 120 mm²","For Main Contacts For Box Terminal Using The Front Clamping Point Finely Stranded Without Core End Processing":"10 ... 120 mm²"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/0a1f1247f4e1e302461ca07122f75463.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=830510&mlfb=3RW5056-2AB04"},"ai":{"faq":[{"question":"What ATEX and UKEX certifications does 3RW5056-2AB04 carry?","answer":"The starter is listed with ATEX, UKEX, and IECEx certifications. This means it can be installed in explosive atmospheres (Zone 1/Zone 2 gas, Zone 21/22 dust) without additional external protection devices, per the equipment group and temperature class on the nameplate."},{"question":"What fieldbus protocols does 3RW5056-2AB04 support without an external module?","answer":"Onboard interfaces include PROFIBUS, PROFINET, Modbus RTU, Modbus TCP, and EtherNet/IP. No external communication module is required for any of these protocols — the starter appears as a standard IO device on the network."},{"question":"How is 3RW5056-2AB04 quoted for volume purchases?","answer":"The ATEX and multi-protocol fieldbus support make it a specified item for hazardous-area MCC projects; lead time and price breaks are quoted per project quantity."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW5056-2AB04","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/3RW5056-2AB04 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}}