Thermal Overload Relay Engineering Guide
A senior-engineer guide to thermal overload relays: bimetallic vs electronic construction, trip classes, FLC dial setting, star-delta sizing, phase-loss and ambient compensation, reset modes,...
- Part number
- LRD04
- Model no
- LRD
In stock · 34
Dispatch
Planned dispatch date. We aim to ship within 1 business day. Depending on warehouse workload it can take 2–3 business days.
· From Türkiye
0
- UL
- CSA
- UKCA
- CCC
- EAC
TeSys DecaSchneider Electric LRD04 TeSys Deca 0.4-0.63A Thermal Overload Relay
Description
About the LRD
About the LRD
The Schneider Electric LRD04 is a TeSys Deca series thermal overload relay designed to provide reliable motor protection across a current setting range of 0.4 to 0.63 A. As part of the proven TeSys Deca platform, the LRD04 delivers accurate trip response to protect motors and connected loads from overload conditions in industrial automation and control panel applications. Compact and robust, it integrates directly with compatible TeSys contactors for streamlined panel assembly.
Applications & Use Cases
- Motor Protection: Safeguards small motors against sustained overload currents in the 0.4–0.63 A range, preventing thermal damage and costly downtime.
- Industrial Control Panels: Mounts directly onto compatible TeSys Deca contactors, simplifying panel wiring and reducing assembly time.
- Automation Systems: Suitable for use in automated production lines, conveyor systems, and process control equipment requiring precise low-current motor protection.
- OEM Machine Building: Lightweight at 0.124 kg, ideal for OEM machine builders seeking compact, reliable overload protection in space-constrained enclosures.
Specification
Full specification
Main 10
| Range | TeSys, TeSys Deca |
|---|---|
| Product name | TeSys LRD, TeSys Deca |
| Product or Component Type | Differential thermal overload relay |
| Device short name | LRD |
| Relay application | Motor protection |
| Product Compatibility | LC1D25, LC1D38, LC1D32, LC1D18, LC1D12, LC1D09 |
| Network type | AC, DC |
| Thermal overload class | Class 10A IEC 60947-4-1 |
| Thermal protection adjustment range | 0.4…0.63 A |
| [Ui] rated insulation voltage | Power circuit 600 V CSA, Power circuit 600 V UL, Power circuit 690 V IEC 60947-4-1 |
Complementary 18
| Network Frequency | 0...400 Hz |
|---|---|
| Mounting support | Plate, with specific accessories, Rail, with specific accessories, Under contactor |
| Tripping threshold | 1.14 +/- 0.06 Ir IEC 60947-4-1 |
| Auxiliary contact composition | 1 NO + 1 NC |
| [Ith] conventional free air thermal current | 5 A signalling circuit |
| Permissible current | 3 A 120 V AC-15 signalling circuit, 0.22 A 125 V DC-13 signalling circuit |
| [Ue] rated operational voltage | 690 V AC 0...400 Hz power circuit IEC 60947-4-1 |
| Associated fuse rating | 4 A gG for signalling circuit, 4 A BS for signalling circuit |
| [Uimp] rated impulse withstand voltage | 6 kV |
| Phase failure sensitivity | Tripping current 130 % of Ir on two phase, the last one at 0 |
| Control type | Red push-button stop, Blue push-button reset |
| Temperature compensation | -4…140 °F (-20…60 °C) |
| 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 clamp terminals 1 0.002…0.02 in² (1.5…10 mm²) flexible without cable end, Power circuit screw clamp terminals 1 0.002…0.006 in² (1…4 mm²) flexible with cable end, Power circuit screw clamp terminals 1 0.002…0.009 in² (1…6 mm²) solid without cable end |
| Tightening torque | Control circuit 15.05 lbf.in (1.7 N.m) screw clamp terminals, Power circuit 15.05 lbf.in (1.7 N.m) screw clamp terminals |
| Height | 2.6 in (66 mm) |
| Width | 1.8 in (45 mm) |
| Depth | 2.8 in (70 mm) |
| Net Weight | 0.273 lb(US) (0.124 kg) |
Environment 9
| Climatic withstand | IACS E10 |
|---|---|
| IP degree of protection | IP20 conforming to IEC 60529 |
| Ambient air temperature for operation | -4…140 °F (-20…60 °C) without derating IEC 60947-4-1 |
| Ambient Air Temperature for Storage | -76…158 °F (-60…70 °C) |
| Flame retardance | V1 conforming to UL 94 |
| Mechanical robustness | Vibrations6 Gn IEC 60068-2-6, Shocks15 Gn for 11 ms IEC 60068-2-7 |
| Dielectric strength | 1.89 kV 50 Hz IEC 60947-1 |
| 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, GB/T 14048.4, GB/T 14048.5, EN 50495 |
| Product Certifications | IEC, UL, CSA, CCC, EAC, BV, RINA, DNV-GL, LROS (Lloyds register of shipping), ATEX INERIS, UKCA |
Show all 51 specifications ↓ Show less ↑14 more values in Identification, Contractual warranty, Logistics.
Identification 8
| Part number | LRD04 |
|---|---|
| Type designation | LRD |
| Brand | Schneider Electric |
| Condition | New, factory sealed |
| Source | Schneider Electric and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Active, in production |
| EAN | 3389110346749 |
Contractual warranty 1
| Warranty (in months) | 18 |
|---|
Logistics 5
| Country of origin | FR |
|---|---|
| Shipping weight | 0.124 kg |
| Ships from | Türkiye |
| Dispatch | 16 Nov |
| Stock | In stock |
Source: manufacturer data · Last verified: 30 Oct 2026
Documents
Documents for LRD04
No documents are on file for this part yet.
Ask us for the datasheet
Certifications
Certifications and standards
- UL
- CSA
- UKCA
- CCC
- EAC
- 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
- GB/T 14048.4
- GB/T 14048.5
- EN 50495
Quick answers
Questions about the LRD
What is the rated current of LRD?
The rated current of LRD is 0.63 A.
What is the HS code of LRD for customs?
The tariff (HS) code on file for LRD is 85364900.
What is the EAN of LRD?
The EAN (GTIN) of LRD is 3389110346749.
Where does LRD ship from, and how fast?
LRD ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival. Stock items are dispatched within 1–2 business days.
Guides
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Reviews
Customer reviews
Series
Schneider Electric TeSys Deca
- Brand
- Schneider Electric
- Series
- TeSys Deca
