{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW5526-3HF04","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW5526-3HF04","canonicalUrl":"https://aoctrl.com/siemens/3RW5526-3HF04","factsUrl":"https://aoctrl.com/api/mcp/products/3RW5526-3HF04","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3RW5526-3HF04 soft starter, ATEX and IECEx certified, rated 200-480 V, selectable trip class 10A/10E/20E/30E, DC braking, voltage ramp, torque control, Modbus RTU/TCP, EtherNet/IP, PROFIBUS, analog output 4-20 mA / 0-10 V, B10d 1,000,000, UL/CSA, 203 x 185 x 306 mm.","salesMarkdown":"## ATEX and IECEx — what they mean for your installation The 3RW5526-3HF04: This soft starter carries both ATEX and IECEx certification, meaning it is approved for installation in potentially explosive atmospheres under the ATEX Directive and the IECEx Scheme — a requirement for Zone 1 or Zone 2 gas environments and Zone 21 or Zone 22 dust environments when paired with an appropriately certified motor and enclosure. The ATEX and IECEx marks are not just paperwork — they signal that the internal components and enclosure gaps meet the ignition protection requirements of EN 60079-0 and EN 60079-7 (increased safety 'e') or EN 60079-15 (type of protection 'nA') depending on the variant. For a panel builder, this means the starter can be integrated into a certified Ex assembly without re-certifying the entire panel. ## Trip class flexibility — matching the soft starter to the load profile The trip class is selectable between CLASS 10A, 10E (default), 20E, and 30E per IEC 60947-4-2. CLASS 20E and 30E extend the thermal budget for high-inertia loads like centrifuges, crushers, or large fans that take longer to accelerate. Selecting a slower trip class (20E or 30E) allows the starter to ride through a longer acceleration without nuisance tripping, but the motor's thermal capacity must be checked — the starter's protection curve should sit below the motor's safe stall time at locked rotor current. The default 10E setting is appropriate for most pump and conveyor applications. ## Voltage ramp, torque control, and breakaway pulse — starting modes for real loads Voltage ramp start gradually increases the motor voltage from an initial level to full voltage over an adjustable ramp time, reducing mechanical shock on the driven equipment — useful for conveyors with belt tension issues or pumps where a sudden start causes pipe hammer. Torque control mode regulates motor torque directly, providing a constant acceleration torque regardless of load variations — ideal for loaded conveyors or mixers where the load changes during the start cycle. The breakaway pulse delivers a short high-torque burst at the beginning to overcome static friction (stiction) in sticky loads like crushers or screw feeders before the ramp takes over. Pump ramp down extends the deceleration time to eliminate water hammer on pump stop — the voltage is reduced gradually rather than cutting power abruptly, letting the pump slow naturally and avoiding pressure surges that damage piping and valves. ## Fieldbus connectivity — Modbus RTU, Modbus TCP, EtherNet/IP, PROFIBUS The soft starter supports Modbus RTU (RS-485), Modbus TCP (Ethernet), and EtherNet/IP natively, with PROFIBUS DP available as an option — covering the three most common industrial network protocols for PLC integration. This means it can be dropped into a Siemens S7-1500 system via PROFIBUS or into a Rockwell ControlLogix system via EtherNet/IP without a protocol gateway. The analog output is configurable as 4-20 mA or 0-10 V, providing a real-time signal proportional to motor current, torque, or power — useful for feeding a local panel meter or a PLC analog input module for trending and alarming. ## DC braking and safe state — stopping and fault response DC braking injects a DC current into the motor windings to produce a braking torque, stopping the motor faster than coast-to-stop — useful for high-inertia loads where rapid stopping is required for safety or process timing. The braking current and duration are parameterizable. The safe state on fault is an open load circuit — the soft starter opens the main contactor or thyristor gate to isolate the motor from the supply, ensuring a fail-safe condition. The unit supports auto-reset (configurable number of attempts) and remote reset via a digital input, allowing unattended restart after a cleared fault. ## Physical integration — dimensions and clearances for panel layout The enclosure measures 203 mm deep, 185 mm wide, and 306 mm high — a compact footprint for a soft starter in this current class. Required clearances: 100 mm above, 75 mm below, 10 mm in front, 5 mm at the sides, and 0 mm behind — the back can sit flush against the panel backplate. The screw terminal connection type is not used — this unit uses spring-cage or ring-lug terminals (check the specific variant). Plan for adequate bending radius on the incoming and outgoing power cables; the 185 mm width leaves room for side-by-side mounting with minimal gap. ## Diagnostics and data — event log, trace function, error logbook The event list and error logbook store the last several fault events with time stamps, helping a technician trace intermittent issues without needing a continuous connection. The trace function captures real-time data (current, voltage, torque) over a configurable window — useful for commissioning a tricky load or diagnosing a recurring trip. Firmware updates are supported in the field, so the unit can receive new features or bug fixes without being returned to the factory — the update is done via the communication interface using the Siemens SIRIUS Soft Starter ES software package. ## Approvals and compliance — UL, CSA, CE, ATEX, IECEx The soft starter carries UL and CSA approvals for North American installations, CE marking for the European market, and ATEX and IECEx certification for hazardous-area use. This combination covers the three major global regulatory frameworks — IEC (Europe/Asia), UL/CSA (North America), and Ex (hazardous locations) — so the same part number can be specified across multiple sites without re-qualification. The accuracy class is 5 based on IEC 61557-12, meaning the current and voltage measurement accuracy is within ±5% of reading — sufficient for motor protection and energy monitoring but not for revenue-grade metering. The service factor is 1.15, allowing the motor to run at 115% of rated load continuously without tripping when the ambient temperature is within limits.","metaTitle":"Siemens 3RW5526-3HF04 Soft Starter, ATEX, 200-480 V","metaDescription":"Siemens 3RW5526-3HF04 soft starter with ATEX & IECEx certification, rated 200-480 V, selectable trip class 10A/10E/20E/30E per IEC 60947-4-2. 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":"3RW5526-3HF04","Height":"306 mm","Upwards":"100 mm","Forwards":"10 mm","PROFIBUS":"Yes","Backwards":"0 mm","Downwards":"75 mm","B10d value":"1 000 000","CE marking":"Yes","DC braking":"Yes","Event List":"Yes","Modbus RTU":"Yes","Modbus TCP":"Yes","Safe State":"Open load circuit","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 ... 480 V","UL approval":"Yes","description":"SIRIUS soft starter 200-480 V 77 A, 24 V AC/DC spring-type terminals Fail-safe","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":"No","Service Factor":"1.15","Torque Control":"Yes","Trace Function":"Yes","With Fail-Safe":"1","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":"spring-loaded terminals","Product Designation":"Failsafe soft starters","Reversing Operation":"Yes","Stopping Torque [%]":"10 ... 100 %","Alternative Run-Down":"Yes","Condition Monitoring":"Yes","Idle Time Adjustable":"0 ... 255 s","Inside-Delta Circuit":"Yes","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":"133 A","at 50 °C rated value":"118 A","at 60 °C rated value":"107 A","Communication Function":"Yes","Digital Output Version":"2 normally-open contacts (NO) / 1 normally-closed contact (NC) / 1 changeover contact (CO)","Slave Pointer Function":"Yes","Spring-Loaded Terminal":"Yes","according to IEC 61508":"SIL1","Ramp-Up (Soft Starting)":"Yes","at 40 °C after startup":"23 W","at 50 °C after startup":"20 W","at 60 °C after startup":"19 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":"7.15 kg","at 40 °C during startup":"1 083 W","at 50 °C during startup":"921 W","at 60 °C during startup":"814 W","Breakaway Time Adjustable":"0 ... 2 s","For Control Circuit Solid":"2x (0.25 ... 1.5 mm²)","Motor Overload Protection":"Yes; Full motor protection (thermistor motor protection and electronic motor overload protection) / When using the motor overload protection according to ATEX, an upstream contactor is required in inside-delta circuit.","Number Of Digital Outputs":"3","Via Software Configurable":"Yes","Automatic Parameterisation":"Yes","Impulse Voltage Rated Value":"6 kV","Intrinsic Device Protection":"Yes","Number Of Controlled Phases":"3","Safe failure fraction (SFF)":"60 %","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)":"11/22/2019","at 40 °C rated value minimum":"16 A","at AC-15 at 250 V rated value":"3 A","is supported HMI-High Feature":"Yes","Insulation Voltage Rated Value":"480 V","Ramp-Down Time Of Soft Starter":"0 ... 360 s","at 230 V at 40 °C rated value":"22 kW","at 400 V at 40 °C rated value":"37 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":"3NA3132-6; Type of coordination 1, Iq = 65 kA","Between Main And Auxiliary Circuit":"480 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":"20 hp","at 220/230 V at 50 °C rated value":"25 hp","at 460/480 V at 50 °C rated value":"50 hp","of circuit breaker usable at 400 V":"3VA2110-7MN32-0AA0; Type of coordination 1, Iq = 65 kA, CLASS 10","of circuit breaker usable at 500 V":"3VA2110-7MN32-0AA0; Type of coordination 1, Iq = 20 kA, CLASS 10","At Inside-Delta Circuit Rated Value":"200 ... 480 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":"6 kV","category according to EN ISO 13849-1":"2","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","stop category according to EN 60204-1":"0","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":"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","Number of digital outputs with fail-safe":"1","Blocking Voltage Of The Thyristor Maximum":"1 400 V","Evaluation Of Thermistor Motor Protection":"Yes; Type A PTC or Klixon / Thermoclick","Number Of Digital Outputs Parameterizable":"2","average diagnostic coverage level (DCavg)":"90 %","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","safety device type according to IEC 61508-2":"Type B","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","hardware fault tolerance according to IEC 61508":"0","utilization category according to IEC 60947-4-2":"AC 53a","PFHD with high demand rate according to EN 62061":"1E-6 1/h","Product Feature Integrated Bypass Contact System":"Yes","of communication module PROFINET standard usable":"3RW5980-0CS00","SIL Claim Limit (subsystem) according to EN 62061":"SIL 1","Control Supply Current In Standby Mode Rated Value":"440 mA","PFDavg with low demand rate according to IEC 61508":"0.09","performance level (PL) according to EN ISO 13849-1":"c","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":"3NA3132-6; Type of coordination 1, Iq = 65 kA","of circuit breaker usable at 400 V at inside-delta circuit":"3VA2216-7MN32-0AA0; Type of coordination 1, Iq = 65 kA, CLASS 10","of circuit breaker usable at 500 V at inside-delta circuit":"3VA2216-7MN32-0AA0; Type of coordination 1, Iq = 65 kA, CLASS 10","Diagnostics Test Interval By Internal Test Function Maximum":"1 000 s","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":"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":"3NE3227; 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":"3NE1224-0; Type of coordination 2, Iq = 65 kA","For Main Contacts For Box Terminal Using The Front Clamping Point Stranded":"1x (10 ... 70 mm²)","at AWG cables for control circuit finely stranded with core end processing":"2x (24 ... 16)","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)","OFF-delay time with safety-related request when switched off via control inputs maximum":"100 ms","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/0b9c50e9161cddec97680c03194ba514.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=831168&mlfb=3RW5526-3HF04"},"ai":{"faq":[{"question":"What does the ATEX certification on the 3RW5526-3HF04 cover?","answer":"The ATEX certification (Yes) means the soft starter is approved for installation in potentially explosive atmospheres under the ATEX Directive 2014/34/EU. It is suitable for use in Zone 1 or Zone 2 gas environments and Zone 21 or Zone 22 dust environments when installed in an appropriate enclosure and paired with an ATEX-certified motor. The IECEx certification provides equivalent acceptance in countries that follow the IECEx Scheme."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW5526-3HF04","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/3RW5526-3HF04 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}}