{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DPER350","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"DPER350","canonicalUrl":"https://aoctrl.com/schneider/DPER350","factsUrl":"https://aoctrl.com/api/mcp/products/DPER350","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Easy TeSys DPER350 differential thermal overload relay, thermal protection adjustment range 37-50 A, Class 10, IP20, UL/CSA/IEC 60947-4-1.","salesMarkdown":"The DPER350 is a differential thermal overload relay from the Easy TeSys range, designed for motor protection in industrial control panels. It protects motors against overload, phase failure, and phase unbalance by monitoring current and tripping when the thermal load exceeds the set threshold. The thermal protection adjustment range spans 37 to 50 A, and the relay is rated as Class 10 per IEC 60947-4-1, meaning it will trip within 10 seconds at 7.2× the set current — fast enough to protect standard induction motors during a stall or locked-rotor condition. Phase failure sensitivity is built in: the relay trips when current on two phases reaches 130% of Ir while the third phase drops to zero, covering the most common motor failure mode in three-phase systems. The IP20 finger-safe enclosure (IEC 60529) suits panel-mount applications where the relay is behind a cabinet door. Power circuit connections accept 2.5–25 mm² flexible or solid wire; control circuit terminals take 1–2.5 mm². Tightening torque is 44.3 lbf·in (5 N·m) for the power side, 15.05 lbf·in (1.7 N·m) for the control side. Approvals include UL 60947-4-1, CSA C22.2 No 60947-4-1, and EN/IEC 60947-4-1, covering installations in North America and Europe. The relay also meets EN 50495 for safety-related applications in potentially explosive atmospheres.","metaTitle":"DPER350 Easy TeSys Differential Thermal Overload Relay, 37-5","metaDescription":"Schneider DPER350 Easy TeSys differential thermal overload relay. Thermal protection adjustment range 37-50 A, Class 10, IP20. UL/CSA/IEC certified. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Overload Relays"],"specifications":{"Depth":"4.8 in (123 mm)","Range":"Easy TeSys","Width":"2.2 in (55 mm)","title":"DPER350","Height":"2.8 in (70 mm)","Category":"US10I1222329","Standards":"EN/IEC 60947-4-1 EN/IEC 60947-5-1 UL 60947-4-1 UL 60947-5-1 CSA C22.2 No 60947-4-1 CSA C22.2 No 60947-5-1 EN 50495","description":"Thermal overload relay,Easy TeSys DPER,37...50A,class 10","Control type":"Red push-button stop Blue push-button reset","Network type":"DC AC","Product name":"Easy TeSys DPER","Protection type":"BS fuse 4 A - signalling circuit GG fuse 4 A - signalling circuit","Surge withstand":"6 kV IEC 60801-5","lifecycle_stage":"current","Flame retardance":"V1 conforming to UL 94","Mounting support":"Plate, with specific accessories Rail, with specific accessories Under contactor","Shock resistance":"15 gn 11 ms IEC 60068-2-7","Device short name":"DPER","Network Frequency":"0...400 Hz","Relay application":"Motor protection","Tightening torque":"Control circuit 15.05 lbf.in (1.7 N.m) screw clamp terminals Power circuit 44.3 lbf.in (5 N.m) screw connection 0.004...0.02 in² (2.5...16 mm²) Power circuit 62.0 lbf.in (7 N.m) screw connection 0.02...0.04 in² (16...25 mm²)","Climatic withstand":"IACS E10","Tripping threshold":"1.14 +/- 0.06 Ir IEC 60947-4-1","Dielectric strength":"1.89 kV 50 Hz IEC 60947-1","Permissible current":"0.95 A 240 V AC-15 signalling circuit 0.06 A 250 V DC-13 signalling circuit","Protective treatment":"TH IEC 60068","Vibration resistance":"4 gn on plate IEC 60068-2-6","Nbr. of units in pkg.":"1","Thermal overload class":"Class 10 IEC 60947-4-1","Connections - terminals":"Control circuit screw clamp terminals 2 0.002...0.004 in² (1...2.5 mm²) flexible without cable end Control circuit screw clamp terminals 2 0.002...0.004 in² (1...2.5 mm²) flexible with cable end Control circuit screw clamp terminals 2 0.002...0.004 in² (1...2.5 mm²) solid without cable end Power circuit screw connectors 1 0.004...0.04 in² (2.5...25 mm²) flexible without cable end Power circuit screw connectors 1 0.004...0.04 in² (2.5...25 mm²) flexible with cable end Power circuit screw connectors 1 0.004...0.04 in² (2.5...25 mm²) solid without cable end","IP degree of protection":"IP20 conforming to IEC 60529","Temperature compensation":"-4...140 °F (-20...60 °C)","Phase failure sensitivity":"Tripping current 130 % of Ir on two phase, the last one at 0","Product or Component Type":"Differential thermal overload relay","Auxiliary contact composition":"1 NO + 1 NC","[Ui] rated insulation voltage":"Power circuit 600 V UL 60947-4-1 Power circuit 690 V IEC 60947-4-1","[Ue] rated operational voltage":"300 V AC 0...400 Hz power circuit IEC 60947-4-1","Ambient Air Temperature for Storage":"-76...158 °F (-60...70 °C)","Thermal protection adjustment range":"37...50 A","Ambient air temperature for operation":"-4...140 °F (-20...60 °C) without derating IEC 60947-4-1","[Uimp] rated impulse withstand voltage":"6 kV","[Ith] conventional free air thermal current":"5 A signalling circuit"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$70.00","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/40f2bfeb5962df8966aed29d6c9ad2d4.pdf","sourceUrl":"https://www.se.com/us/en/product/DPER350/thermal-overload-relayeasy-tesys-dper3750aclass-10/"},"ai":{"faq":[{"question":"What is the thermal protection adjustment range of DPER350?","answer":"The DPER350 adjusts from 37 to 50 A, covering motor full-load currents in that band. It is a Class 10 relay per IEC 60947-4-1."},{"question":"What standards does DPER350 comply with?","answer":"It complies with EN/IEC 60947-4-1, UL 60947-4-1, CSA C22.2 No 60947-4-1, and EN 50495 for use in potentially explosive atmospheres."},{"question":"Where can I buy DPER350 and get current pricing?","answer":"The DPER350 is sourced to order against an RFQ. Submit a request for quote to confirm availability and current pricing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/DPER350","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/schneider/DPER350 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}}