{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1SFA895015R7020","brand":"ABB","brandSlug":"abb","productSlug":"1SFA895015R7020","canonicalUrl":"https://aoctrl.com/abb/1SFA895015R7020","factsUrl":"https://aoctrl.com/api/mcp/products/1SFA895015R7020","rawCanonicalId":null},"summary":{"shortDescription":"ABB PSTB370 soft starter, 1SFA895015R7020, 370 A in-line / 640 A inside-delta, 400-690 V AC, 0-120 s ramp, integrated electronic overload.","salesMarkdown":"The ABB PSTB370 soft starter (order code 1SFA895015R7020) carries two current ratings that govern how you wire it into the motor circuit. In-line connection is rated 370 A (Ie), which is the current through the main terminals when the starter is wired in series with the motor leads. Inside-delta connection is rated 640 A — a 73% higher figure because each phase handles only the winding current, not the line current. That inside-delta rating lets you downsize the starter for the same motor kW: at 400 V, the in-line power rating is 200 kW, while inside-delta reaches 355 kW. Pick the wiring topology first, then size the starter. The ramp time is adjustable from 0 to 120 seconds, giving you a wide window to match the acceleration profile of conveyors, pumps, or fans. Initial voltage during start is set between 30% and 70% of line voltage, and a separate step-down voltage special ramp (100% down to 30%) handles deceleration or soft stopping. ## Integrated protection and control signals Built-in electronic overload protection is standard — no separate overload relay needed. The current limit function is adjustable from 1.5 to 7 times the rated current Ie, and starting capacity is 3x Ie for 15 seconds. Three dedicated signal relays (run, fault, bypass, overload) give you discrete dry contacts for the PLC or annunciator panel. A red LED indicates a fault condition; a yellow LED signals protection activation. The control supply voltage accepts 100...250 V AC, and a separate 24 V DC control circuit is available for the logic interface. Communication is via a standard FieldBusPlug — the starter accepts a plug-in fieldbus adapter for PROFIBUS, DeviceNet, or similar protocols, but the base unit ships without the module installed. Main circuit terminals are bars with a 10.5 mm hole diameter — expect to use ring lugs or busbar connections, not wire ferrules. Control circuit terminals accept rigid 1 x 2.5 mm² wire with a tightening torque of 0.5 N·m. The supply circuit connection is also rigid 1 x 2.5 mm². Ambient operating temperature range is 0 to +50 °C, with a 115% service factor for continuous overload capability. Degree of protection at the main terminals is IP00 — the starter is intended for enclosure mounting, not standalone outdoor use.","metaTitle":"ABB PSTB370 Soft Starter 1SFA895015R7020, 370 A In-Line","metaDescription":"ABB PSTB370 soft starter, 370 A in-line (640 A inside-delta), 400-690 V AC. Integrated electronic overload, ramp 0-120 s. Current 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":"PSTB370","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 400 ... 690 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 10.5 mm","Material Compliance/WEEE Category":"5. Small Equipment (No 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) 200 kW","Rated Operational Power - Inside Delta Connection":"at 400 V 355 kW","Popular Downloads/Data Sheet, Technical Information":"1SFC132005C0201","Rated Operational Current - In-Line Connection (Ie)":"370 A","Rated Operational Current - Inside Delta Connection":"640 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/1sfa895015r7020","alternativesUrl":"https://aoctrl.com/api/mcp/products/1SFA895015R7020/alternatives.json"},"ai":{"faq":[{"question":"What is the ramp time range on this PSTB370?","answer":"The ramp time is adjustable from 0 to 120 seconds. Initial voltage during start can be set between 30% and 70% of line voltage, and a step-down voltage ramp from 100% to 30% handles soft stopping."},{"question":"What communication protocol does 1SFA895015R7020 use?","answer":"The base unit has a standard FieldBusPlug interface that accepts a plug-in fieldbus adapter module (not included). The starter itself does not have a fixed protocol; you add the adapter for PROFIBUS, DeviceNet, or other protocols as needed."},{"question":"Where can I buy 1SFA895015R7020 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at the time of quote — submit an RFQ for a firm price and lead time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/1SFA895015R7020","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/1SFA895015R7020 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}}