Spec SheetThe Square D TeSys LRD thermal overload relay, model LR3D3553, is designed for use with TeSys D contactors. It offers protection for motors up to 15kW at 400V, with a thermal setting range of 23-32A and a trip class of 20. The relay is suitable for direct mounting on TeSys D contactors and features manual test and reset buttons, an automatic reset option, trip auxiliary contacts, and a trip flag indicator.
Constructed as a bimetallic type relay, it is temperature compensated for accurate protection. The relay supports both DC and AC network types and is certified under multiple standards including IEC, UL, CSA, CCC, EAC, and others. It has a dielectric strength of 1.89 kV at 50 Hz and a width of 75 mm, with a depth of 121 mm.
- Thermal overload protection for unbalanced loads
- Thermal setting range: 23-32A
- Trip class: 20
- Manual test & reset buttons with automatic reset option
- Trip auxiliary contact and flag indicator
- Direct mounting on TeSys D contactors
- Certified for IEC, UL, CSA, CCC, EAC standards
Technical Specifications
| Complementary Attributes - Ui Rated Insulation Voltage | power circuit 1000 V IEC 60947-4-1, power circuit 600 V CSA, power circuit 600 V UL |
| Complementary Attributes - Ue Rated Operational Voltage | 690 V AC 0...400 Hz power circuit IEC 60947-4-1 |
| Complementary Attributes - Uimp Rated Impulse Withstand Voltage | 6 kV IEC 60947-1 |
| Associated Fuse Rating | 4 A gG for signalling circuit, 4 A BS for signalling circuit |
| Control Type | Red push-button stop, Blue push-button reset |
| Mechanical Robustness | vibrations6 Gn IEC 60068-2-6, shocks15 Gn for 11 ms IEC 60068-2-7 |
| Mounting Support | plate, with specific accessories, rail, with specific accessories, under contactor |
| Network Type | DC, AC |
| Product Name | TeSys LRD, TeSys Deca |
| Temperature Compensation | -20-60 °C, -20-60 °C |
| Tightening Torque | control circuit 1.7 N.m screw clamp terminals, power circuit 9 N.m screw clamp terminals |
| Connections Terminals | control circuit screw clamp terminals 2 1-2.5 mm² flexible with cable end, control circuit screw clamp terminals 2 1-2.5 mm² solid without cable end, power circuit screw clamp terminals 1 4-35 mm² flexible without cable end, power circuit screw clamp terminals 1 4-35 mm² flexible with cable end, power circuit screw clamp terminals 1 4-35 mm² solid without cable end, control circuit screw clamp terminals 2 1-2.5 mm² flexible without cable end |
| Carbon Footprint Of The Distribution Phase A4 | 0.1490730773104017, 0.1 kg CO2 eq. |
| Carbon Footprint Of The End Of Life Phase C1 To C4 | 1 kg CO2 eq., 1.1693962688439379 |
| Carbon Footprint Of The Installation Phase A5 | 0.07981408927347457, 0.1 kg CO2 eq. |
| Carbon Footprint Of The Manufacturing Phase A1 To A3 | 4 kg CO2 eq., 3.9398475418890286 |
| Carbon Footprint Of The Use Phase B2 B3 B4 B6 | 6 kg CO2 eq., 5.689007352019705 |
| Certificate Agency | IEC, UL, CSA, CCC, EAC, BV, DNV-GL, LROS (Lloyds register of shipping), UKCA |
| Local Data Status | Publishable |
| Local Publishable Date | 2025-02-26 |
| Return Indicator | Y |
| Stocking Flag | Y |
| Stock Policy | 1 |
| Device Type | Relay, Control & Measurement - Protection relay |
| Serviceability | No |
| Traceability | No |
| Weee Scope | In |
| Weee Product Category | 5 |
| Scope Perimeter | At least in Europe |
| Eoli Availability Display | Yes |
| End Of Life Doc Ref | ENVEOLI1101001 |
| Reach Full Compliance Status | Free of Substances of Very High Concern above the threshold |
| Reach Full Compliance Status Id | NOT_CONTAINING_SVHC |
| Reach Compliance Directive | Free of Substances of Very High Concern above the threshold |
| Rohs Eur In Scope | Yes |
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