{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1SFA894020R7020","brand":"ABB","brandSlug":"abb","productSlug":"1SFA894020R7020","canonicalUrl":"https://aoctrl.com/abb/1SFA894020R7020","factsUrl":"https://aoctrl.com/api/mcp/products/1SFA894020R7020","rawCanonicalId":null},"summary":{"shortDescription":"ABB PSTB1050 soft starter, 1SFA894020R7020, 1050 A in-line rated current, 560 kW at 400 V, 0-120 s ramp time, FieldBusPlug communication, built-in electronic overload protection.","salesMarkdown":"The ABB PSTB1050 soft starter (1SFA894020R7020) is sized for a 1050 A in-line motor load, which translates to 560 kW at 400 V — the rating that governs the BOM line for a pump, fan, or conveyor drive. The 0 to 120 second ramp time covers soft start and soft stop profiles; set the initial voltage during start between 30 and 70 % to match the load's breakaway torque without a mechanical shock. Built-in electronic overload protection (1.5 to 7x Ie current limit function) means you skip the separate overload relay — one device handles both starting and running protection. For inside-delta configurations, the same unit delivers 1810 A and 1000 kW at 400 V — a useful headroom when the motor windings are reconnected for higher starting torque. The 24 V DC control circuit voltage interfaces directly with standard PLC or relay logic; the 100-250 V AC control supply powers the internal electronics without a separate transformer. Main circuit terminals are bars with a 12.5 mm hole diameter — expect lug-type connections sized for the 1050 A continuous current. Control circuit wiring accepts 1 x 2.5 mm² rigid conductors, tightened to 0.5 N·m. The FieldBusPlug communication interface (standard) connects to the automation network via a plug-in module; no fieldbus wiring to the main terminal block. The unit includes run, fault, bypass, and overload signal relays — all dry contacts for the PLC to monitor start complete, trip, and bypass engagement. The red LED signals a fault condition; the yellow LED indicates protection active. Ambient operating temperature is 0 to +50 °C, so panel placement should avoid heat sources like adjacent drives or transformers.","metaTitle":"1SFA894020R7020 ABB PSTB1050 Soft Starter 1050A, 560kW, 0-12","metaDescription":"ABB PSTB1050 soft starter, 1050 A in-line (560 kW at 400 V), 0-120 s ramp, built-in electronic overload, FieldBusPlug communication. Current lifecycle stage. Sourced to order again","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":"PSTB1050","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":"100 %","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) 560 kW","Rated Operational Power - Inside Delta Connection":"at 400 V 1000 kW","Popular Downloads/Data Sheet, Technical Information":"1SFC132005C0201","Rated Operational Current - In-Line Connection (Ie)":"1050 A","Rated Operational Current - Inside Delta Connection":"1810 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/1sfa894020r7020","alternativesUrl":"https://aoctrl.com/api/mcp/products/1SFA894020R7020/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 1SFA894020R7020?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the ramp time range on this soft starter?","answer":"The ramp time is adjustable from 0 to 120 seconds, covering both soft start and soft stop profiles for pump, fan, and conveyor applications."},{"question":"What communication interface does 1SFA894020R7020 use?","answer":"It uses a FieldBusPlug (standard) interface — a plug-in communication module for connection to the automation network, not hardwired fieldbus to the main terminals."},{"question":"Does this soft starter include overload protection?","answer":"Yes, it has built-in electronic overload protection with a current limit function adjustable from 1.5 to 7 times the rated current Ie, eliminating the need for a separate overload relay."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/1SFA894020R7020","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/1SFA894020R7020 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}}