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LR2D3561
Schneider LR2D3561 available at EU Automation. Get in touch today for a quick price.
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What happens next?
1. Email confirmation
You will get an email confirming that we have received your enquiry.
2. Dedicated Account Manager
One of our team will be in touch to confirm your part(s) specification and condition.
3. Your quote
You will receive a comprehensive quote tailored to your specific needs.
Schneider Electric LR2D3561 is a TeSys Deca (TeSys LRD) differential thermal overload relay designed for reliable motor protection in AC or DC applications. It provides an adjustable thermal protection setting of 55–70 A with Class 20 tripping characteristics and a trip threshold of 1.14 ± 0.06 Ir, helping to protect motors against overload conditions and phase loss (phase-failure sensitivity: tripping at 130% of Ir on two phases with the remaining phase at 0). The relay includes 1 NO + 1 NC auxiliary contacts for signalling and features red stop and blue reset push-buttons for straightforward operation.
Built for integration with Schneider LC1D80 and LC1D95 contactors, the LR2D3561 can be mounted under the contactor, or on rail/plate using specific accessories. It is rated up to 690 V insulation (IEC) and supports 0–400 Hz networks, with an impulse withstand voltage of 6 kV. Screw clamp terminals accommodate power conductors from 4–35 mm² and control conductors from 1–2.5 mm², with a compact form factor of 100 mm (H) × 75 mm (W) × 121 mm (D) and IP20 protection.
Built for integration with Schneider LC1D80 and LC1D95 contactors, the LR2D3561 can be mounted under the contactor, or on rail/plate using specific accessories. It is rated up to 690 V insulation (IEC) and supports 0–400 Hz networks, with an impulse withstand voltage of 6 kV. Screw clamp terminals accommodate power conductors from 4–35 mm² and control conductors from 1–2.5 mm², with a compact form factor of 100 mm (H) × 75 mm (W) × 121 mm (D) and IP20 protection.
| Specification | Description |
|---|---|
| Manufacturer | Schneider Electric |
| Part number | LR2D3561 |
| Product range | TeSys |
| Product type | Differential thermal overload relay |
| Primary application | Motor protection (thermal overload and phase-loss detection) |
| Thermal overload class | Class 20 (IEC 60947-4-1) |
| Current setting range (Ir) | Adjustable 55…70 A |
| Tripping threshold | 1.14 ± 0.06 × Ir (IEC 60947-4-1) |
| Phase failure sensitivity | Trips at 130% of Ir on two phases, with the remaining phase at 0 |
| Compatible contactors | TeSys D LC1D80, LC1D95 |
| Supply / network type | AC and DC systems |
| Network frequency | 0…400 Hz |
| Rated insulation voltage (Ui) | 600 V (UL/CSA power circuit); 690 V (IEC 60947-4-1 power circuit) |
| Rated operational voltage (Ue) | Up to 1000 V AC, 0…400 Hz (power circuit, IEC 60947-4-1) |
| Impulse withstand voltage (Uimp) | 6 kV |
| Auxiliary contact configuration | 1 NO + 1 NC |
| Conventional thermal current (Ith) | 5 A (signalling circuit) |
| Signalling circuit rating (AC-15) | 0.72 A at 500 V |
| Signalling circuit rating (DC-13) | 0.06 A at 440 V |
| Associated fuse rating (signalling) | 4 A gG; 4 A BS |
| Reset / control interface | Red stop push-button; blue reset push-button |
| Temperature compensation | -20…60 °C |
| Mounting options | Under contactor; rail or plate mounting with specific accessories |
| Power terminals | Screw clamp, 1 conductor: 4…35 mm² (solid or flexible, with/without ferrule) |
| Control terminals | Screw clamp, 2 conductors: 1…2.5 mm² (solid or flexible, with/without ferrule) |
| Tightening torque | Power: 9 N·m; Control: 1.7 N·m |
| IP rating | IP20 (IEC 60529) |
| Operating ambient temperature | -20…60 °C (without derating) |
| Storage temperature | -60…70 °C |
| Protective treatment | TH (IEC 60068) |
| Flame retardance | UL 94 V1 |
| Mechanical robustness | Vibrations: 6 Gn (IEC 60068-2-6); Shocks: 15 Gn for 11 ms (IEC 60068-2-7) |
| Standards | IEC/EN 60947-4-1, IEC/EN 60947-5-1, UL 508, CSA C22.2 No 14 (as applicable) |
| Dimensions (H × W × D) | 100 × 75 × 121 mm |
| Net weight | 0.535 kg |
| Part description (website) | Schneider LR2D3561 is an adjustable TeSys thermal overload relay designed for dependable motor protection, with a 55–70 A setting range and Class 20 tripping. It pairs with TeSys D contactors (LC1D80/LC1D95), includes phase-loss sensitivity to help protect three‑phase motors, and provides 1NO+1NC auxiliary contacts for straightforward control and signalling integration. |
What does this thermal overload relay do in a motor starter?
It provides motor overload and phase-loss protection by monitoring current through the motor and tripping when an overload condition is detected, helping to prevent overheating damage. This device is a differential thermal overload relay (LR2D3561).
What current range can the relay be set to?
The adjustable thermal protection setting range is 55 to 70 A, allowing you to match the trip setting to the motor’s rated current.
What trip class is it and what does that mean?
It is Class 20 (IEC 60947-4-1), which is typically selected for motors with higher starting times or heavier starting loads where a longer permissible start duration is required compared with faster trip classes.
Which contactors is it designed to work with?
It is specified as compatible with LC1D80 and LC1D95 contactors, commonly used in TeSys D motor starter assemblies.
Can it be used on AC or DC systems?
Yes. It is designed for AC and DC network types, making it suitable for a wide range of motor control panels.
What frequency range is supported?
It supports 0 to 400 Hz, which covers standard mains applications and many variable-frequency drive (VFD) output scenarios.
How sensitive is it to phase failure on three-phase motors?
It includes phase failure sensitivity: it trips when two phases carry approximately 130% of the set current (Ir) while the remaining phase is at 0, helping protect the motor during single-phasing conditions.
What auxiliary contacts are included for control signalling?
It includes 1 normally open (NO) and 1 normally closed (NC) auxiliary contact for status indication and interlocking in control circuits.
What are the signalling contact ratings for typical control duties?
For signalling circuits, permissible current is 0.72 A at 500 V AC-15 and 0.06 A at 440 V DC-13. The conventional free-air thermal current (Ith) for the signalling circuit is 5 A.
What are the main voltage ratings to consider when selecting it?
Key ratings include: rated insulation voltage (Ui) up to 690 V (IEC) for the power circuit, and an impulse withstand voltage (Uimp) of 6 kV. The rated operational voltage (Ue) for the power circuit is specified up to 1000 V AC (0–400 Hz) in the latest product data.
How is it mounted in a panel?
It can be mounted under a compatible contactor, or on a plate or rail when used with the appropriate accessories, giving flexibility for motor control panel layouts.
What cable sizes can be terminated on the power and control terminals?
Power circuit screw clamp terminals accept 4 to 35 mm² (solid or flexible, with or without cable end). Control circuit screw clamp terminals accept 1 to 2.5 mm² (solid or flexible, with or without cable end).
What tightening torque should be used for the terminals?
Typical tightening torques are 9 N·m for the power terminals and 1.7 N·m for the control terminals.
What are the dimensions and approximate weight?
Approximate dimensions are 100 mm (H) × 75 mm (W) × 121 mm (D), with a net weight around 0.535 kg.
What environmental limits should be considered in a control cabinet?
It is rated for operation from -20 to +60 °C without derating and storage from -60 to +70 °C. The ingress protection rating is IP20, so it is intended for installation inside an appropriate enclosure.
- Protecting three‑phase AC motors from sustained overload conditions in industrial control panels
- Providing thermal overload protection for high‑current motor circuits with an adjustable setting range of 55–70 A
- Detecting phase loss/phase imbalance in motor starters to help prevent single‑phasing damage
- Pairing with compatible TeSys D contactors (e.g., LC1D80, LC1D95) to build a coordinated motor starter assembly
- Using the built‑in auxiliary contacts (1 NO + 1 NC) for trip indication, alarm signalling, or interlocking within control circuits
- Supporting applications with frequent starts or higher inertia loads where a Class 20 trip characteristic is required
- Protecting motors driving pumps, fans, compressors, conveyors, and other constant‑duty or variable load machinery
- Integrating into mixed AC/DC control architectures where the starter control circuit differs from the motor supply
- Panel retrofits and maintenance replacements where an LR2D‑series overload relay is specified for 55–70 A motor protection
This content has been produced using multiple sources. EU Automation takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
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