{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1SFA894019R7020","brand":"ABB","brandSlug":"abb","productSlug":"1SFA894019R7020","canonicalUrl":"https://aoctrl.com/abb/1SFA894019R7020","factsUrl":"https://aoctrl.com/api/mcp/products/1SFA894019R7020","rawCanonicalId":null},"summary":{"shortDescription":"ABB PSTB840 series softstarter, order code 1SFA894019R7020, rated 840 A in-line connection, 450 kW at 400 V, 208-600 V AC, with built-in electronic overload protection and 0-120 s ramp time.","salesMarkdown":"## Softstarter for heavy motor loads The ABB PSTB840 1SFA894019R7020 is a softstarter rated 840 A in-line connection, delivering 450 kW at 400 V and 800 kW in inside-delta configuration. That 840 A continuous rating means it handles large induction motors — pumps, conveyors, compressors — up to that full-load current without external bypass contactors, because the built-in bypass signal relay confirms the unit has transitioned to run mode. The control supply is 100-250 V AC; a separate 24 V DC control circuit is also available for PLC-driven panels. ## Built-in protection and ramp control Integrated electronic overload protection eliminates the need for a separate overload relay — the softstarter itself monitors motor current and trips on overload. Current limit is adjustable from 1.5 to 7 times the set motor current Ie, and the ramp time is settable from 0 to 120 seconds. Initial voltage during start is adjustable 30-70 %, with a step-down voltage special ramp from 100-30 % for soft stopping pumps to prevent water hammer. Starting capacity is 3xIe for 15 seconds, which covers most standard squirrel-cage motor start profiles. The unit includes run, fault, bypass, and overload signal relays — four separate dry contacts for the PLC or DCS to monitor status.","metaTitle":"ABB PSTB840 1SFA894019R7020 Softstarter, 840 A, 450 kW","metaDescription":"ABB PSTB840 softstarter 1SFA894019R7020 rated 840 A in-line, 450 kW at 400 V, 208-600 V AC. Built-in electronic overload, ramp 0-120 s. Active production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Soft Starters"],"specifications":{"Ramp Time":"0 ... 120 second [unit of time]","Communication":"FiledBusPlug(Standard)","Terminal Type":"Main Circuit: Bars","Analog Outputs":"0...10 volts","lifecycle_stage":"current","Run Signal Relay":"Yes","Product Main Type":"PSTB840","Tightening Torque":"Control Circuit 0.5 N·m","Fault Signal Relay":"Yes","Overload Protection":"Build-in electronic overload protection","Rated Frequency (f)":"50/60 Hz","By-pass Signal Relay":"Yes","Degree of Protection":"acc. to IEC 60529, IEC 60947-1, EN 60529 Main Terminals IP00","Overload Signal Relay":"Yes","Current Limit Function":"1.5 ... 7xIe","Ambient Air Temperature":"Operation 0 ... +50 °C","Rated Operational Voltage":"Main Circuit 208 ... 600 V AC","Service Factor Percentage":"115 %","Object Classification Code":"Q","Initial Voltage During Start":"30 ... 70 %","Signal Indication Fault (LED)":"Red","Integrated Electronic Overload":"Yes","Step Down Voltage Special Ramp":"100 ... 30 %","Connecting Capacity Main Circuit":"Hole Diameter 12.5 mm","Material Compliance/WEEE Category":"4. Large Equipment (Any External Dimension More Than 50 cm)","Rated Control Supply Voltage (Us)":"100 ... 250 V AC","Connecting Capacity Supply Circuit":"Rigid 1 x 2.5","Material Compliance/WEEE B2C / B2B":"Business To Business","Rated Control Circuit Voltage (Uc)":"DC Operation 24 V","Signal Indication Protection (LED)":"Yellow","Switch for Inside Delta Connection":"Yes","Connecting Capacity Control Circuit":"Rigid 1 x 2.5 mm²","Material Compliance/RoHS Information":"No declaration needed","Popular Downloads/Instructions and Manuals":"1SFC132003M0201","Starting Capacity at Maximum Rated Current Ie":"3xIe for 15s","Rated Operational Power - In-Line Connection (Pe)":"(400 V) 450 kW","Rated Operational Power - Inside Delta Connection":"at 400 V 800 kW","Popular Downloads/Data Sheet, Technical Information":"1SFC132005C0201","Rated Operational Current - In-Line Connection (Ie)":"840 A","Rated Operational Current - Inside Delta Connection":"1455 A","Material Compliance/Conflict Minerals Reporting Template (CMRT)":"9AKK108467A5658"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://www.abb.com/global/en/products/1sfa894019r7020","alternativesUrl":"https://aoctrl.com/api/mcp/products/1SFA894019R7020/alternatives.json"},"ai":{"faq":[{"question":"What is the ramp time on 1SFA894019R7020?","answer":"The ramp time is adjustable from 0 to 120 seconds, with initial voltage during start settable from 30 to 70 % of line voltage."},{"question":"What communication interface does this softstarter use?","answer":"It uses a standard FieldBusPlug communication interface, meaning it accepts ABB's fieldbus adapter modules for PROFIBUS, DeviceNet, Modbus, or other protocols via the plug-in slot."},{"question":"What compliance documentation is available for 1SFA894019R7020?","answer":"The manufacturer provides an instruction manual (1SFC132003M0201) and a technical data sheet (1SFC132005C0201). RoHS declaration is marked as no declaration needed; material compliance follows WEEE category 4 (Large Equipment)."},{"question":"Where can I buy 1SFA894019R7020 and what is the lead time?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Current pricing and lead time are confirmed at quote time — submit an RFQ for a firm commitment."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/1SFA894019R7020","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/abb/1SFA894019R7020 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}