Documentation & Downloads
Schneider Electric LRD21 TeSys Deca Thermal Overload Relay 12-18A Class 10A IP20
- MPN: LRD21
- PPN: SCH-LRD21
CAD
$139.20
/ EA
Available to Order
Available to Ship Same/Next Business Day if In Stock and Ordered before 12:00 PM EST
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Spec sheet
Description
TeSys LRD overload relays are designed to be used with TeSys D contactors to make a motor starter. This overload relay can be used with 9 amp through 38 amp TeSys D contactors. These differential thermal overload relays detect over currents in the lines to the motor. When an overcurrent is detected the overload relay working with the contactor will disconnect the power to the motor. This will minimize the damage to the motor windings. This overload relay has an adjustable trip current rating of 12 to 18 amperes. This trip current rating is calibrated per Class 10A. Multi standards certified (IEC, UL, CSA, CCC, EAC, ATEX, Marine).
Features
- The LRD21 is a TeSys Deca differential thermal overload relay designed to protect AC motors against overloads and phase failures. It acts as a critical safety barrier by monitoring the current drawn by the motor and automatically tripping the associated contactor if the current stays above the set limit, preventing permanent insulation damage and motor burnout.
- Featuring a precise adjustment dial ranging from 12 to 18 Amps, the LRD21 allows you to tailor the protection profile to your motor's specific Full Load Amps (FLA). This ensures a high level of accuracy that prevents nuisance tripping during normal operation while providing a rapid response to mechanical jams or electrical faults.
- This relay features a "differential" design, making it highly sensitive to phase loss or phase unbalance. If one phase fails a common cause of rapid motor failure the LRD21 detects the discrepancy and trips the circuit faster than a standard overload, shielding your equipment from the extreme heat buildup caused by single-phasing.
- The LRD21 is equipped with 1 NO (Normally Open) + 1 NC (Normally Closed) auxiliary contacts. These allow for seamless integration into your control logic; the NC contact is used to break the contactor coil circuit to stop the motor, while the NO contact can trigger a "Fault" pilot light or send a signal to a PLC for immediate diagnostic feedback.
- The unit features a blue selector lever that allows you to choose between Manual or Automatic reset modes. Manual mode ensures a technician must physically inspect the machinery before restarting, while the integrated "Test" and "Stop" buttons allow for safe verification of the control circuit without disconnecting any wiring.
Documentation & Downloads
Specifications
Key Specifications
- Country of Origin
- Brazil, France, Thailand, United States
Depth70 mm
Important Information Attributes
- Persona Type Ids
- EU, LC, OM, OM8, PB, SC
- Market Segmentation Id
- COMMERCIAL, INDUSTRIAL
- Associated Fuse Rating
- 4 A gG for signalling circuit, 4 A BS for signalling circuit
- Mounting Support
- plate, with specific accessories, rail, with specific accessories, under contactor
- Permissible Current
- 1.5 A 240 V AC-15 signalling circuit, 0.1 A 250 V DC-13 signalling circuit
- Range
- TeSys, TeSys Deca
- Certificate Agency
- IEC, UL, CSA, CCC, EAC, BV, RINA, DNV-GL, LROS (Lloyds register of shipping), ATEX INERIS, UKCA
- Connections - Terminals
- power circuit screw clamp terminals 1 1-4 mm² flexible with cable end, power circuit screw clamp terminals 1 1-6 mm² solid, control circuit screw clamp terminals 2 1-2.5 mm² flexible without cable end, 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, power circuit screw clamp terminals 1 1.5-10 mm² flexible without cable end
- Carbon Footprint Of The End-of-life Phase [C1 To C4]
- 0.2 kg CO2 eq., 0.21678519324421383
- Carbon Footprint Of The Manufacturing Phase [A1 To A3]
- 1 kg CO2 eq., 1.0267614686619415
- Local Data Status
- Publishable
- Return Indicator
- Y
- Stock Policy
- 2
- Serviceability
- No
- Weee Scope
- In
- Scope Perimeter
- At least in Europe
- End Of Life Doc Ref
- ENVEOLI0802006
- Reach Full Compliance Status Id
- NOT_CONTAINING_SVHC
- Rohs Eur In Scope
- Yes
- Rohs Eur Conformity Date
- 0627
- China Rohs In Scope
- No
- With Recycled Cardboard
- Yes
- Product Contributes To Saved And Avoided Emissions
- No
- Tier
- 1
- Function Option
- Standard
- Compatibility Code
- LRD
- Device Short Name
- LRD
- Flame Retardance
- V1 conforming to UL 94
- Phase Failure Sensitivity
- tripping current 130 % of Ir on two phase, the last one at 0
- Product Or Component Type
- differential thermal overload relay
- Returnability
- Yes
- Sustainable Packaging
- No
- Thermal Protection Adjustment Range
- 12-18 A
- Total Lifecycle Carbon Footprint
- 13 kg CO2 eq.
- Weee Label
- The product must be disposed on European Union markets following specific waste collection and never end up in rubbish bins.
- Pep Code
- ENVPEP0802006EN
- Pep Verification Date
- 2025-08-05
- Psr Version
- PSR-0005-ed3-EN-2023 06 06
- Data Source
- extrapolated product
- Functional-unit Quantity
- 1
- Reference Lifetime In Y
- 20
- Energy Model - Manufacturing [A1-a3]
- Europe, EU-27
- Energy Model - Use [B6]
- Electricity Mix; Low voltage; 2018; Europe, EU-27
- Recyclability Potential In %
- 50
- Width Nominal
- 45 mm
- [Ue] Rated Operational Voltage
- 690 V AC 0...400 Hz power circuit IEC 60947-4-1
- Nbr. Of Units In Pkg.
- 1
- Take-back
- No
- Customs Code
- 8536490080
Persona Type NamesEnd User, Contractor, Original Equipment Manufacturer, OEM - Control Panelbuilder, Panel Builder, Electrician
Market SegmentationCommercial, Industrial
Mechanical Robustnessvibrations6 Gn IEC 60068-2-6, shocks15 Gn for 11 ms IEC 60068-2-7
Network TypeAC, DC
Product NameTeSys LRD, TeSys Deca
Temperature Compensation-20-60 °C, -20-60 °C
[Ui] Rated Insulation Voltagepower circuit 600 V CSA, power circuit 600 V ULpower circuit 690 V IEC 60947-4-1
Carbon Footprint Of The Distribution Phase [A4]0.024163479198025903, 0 kg CO2 eq.
Carbon Footprint Of The Installation Phase [A5]0.01635889814277638, 0 kg CO2 eq.
Carbon Footprint Of The Use Phase [B2 B3 B4 B6]12 kg CO2 eq., 11.633004615445152
Local Publishable Date2026-06-27
Stocking FlagN
Device TypeRelay, Control & Measurement - Protection relay
TraceabilityNo
Weee Product Category5
Eoli Availability DisplayYes
Reach Full Compliance StatusFree of Substances of Very High Concern above the threshold
Reach Compliance DirectiveFree of Substances of Very High Concern above the threshold
Rohs Eur StatusCompliant
Rohs Eur Full Compliance StatusCompliant
China Rohs Label1
Without Single Use PlasticYes
Tier Id1
Function Option IdSTANDARD
Product Kit IdentifierN
Control TypeRed push-button stopBlue push-button reset
Dielectric Strength1.89 kV 50 Hz IEC 60947-1
Network Frequency0...400 Hz
Product AvailabilityStock - Normally stocked in distribution facility
Relay Applicationmotor protection
Software Versionv6.1
Thermal Overload Classclass 10A IEC 60947-4-1
Tightening Torquecontrol circuit 1.7 N.m screw clamp terminalspower circuit 2.5 N.m screw clamp terminals
Tripping Threshold1.14 +/- 0.06 Ir IEC 60947-4-1
R Thermal Protection Adj Range12-18 A
Database Version2023-02
Pcr VersionPCR-4-ed4-EN-2021 09 06
Type Of Verification For The PepIndependent internal review
Functional-unit DescriptionOther switchgear and controlgear solutions mentioned in the scope (e.g. fuses TC32, all-or-nothing relays TC94, Measuring relays and protection equipment TC95), apply the general rules of PCR and mention in the accompanying report the functional unit, the reference product characteristics, the reference lifetime and the use scenario which are applied consistently with the relevant IEC technical standards.
Functional-unit Unitunit
Energy Consumption On Product Lifetime In Kwh28.3824
Energy Model - Installation [A5]Electricity Mix; Low voltage; 2018; Europe, EU-27
Energy Model - End Of Life [C1-c4]Electricity Mix; Low voltage; 2018; Europe, EU-27
Height Nominal66 mm
[Ith] Conventional Free Air Thermal Current5 A signalling circuit
[Uimp] Rated Impulse Withstand Voltage6 kV
Package Weight(Lbs)144.000 g
Warranty (In Months)18
Environment Attributes Main
- China Rohs Regulation
- Product out of China RoHS scope , Pro-active China RoHS declaration (out of China RoHS legal scope)
- Ambient Air Temperature For Storage
- -60-70 °C, -60-70 °C
- Take Back
- No
- Recycled Metal Content At Cr Level
- 0 %
- Mercury Free
- Yes
- Circularity Profile
- ENVEOLI0802006
- Environmental Disclosure
- ENVPEP0802006EN
- Ip Degree Of Protection
- IP20 conforming to IEC 60529
- Packaging Without Single Use Plastic
- Yes
- Reach Regulation
- Free of Substances of Very High Concern above the threshold
- Pep Verification Date
- 2025-08-05
- Psr Version
- PSR-0005-ed3-EN-2023 06 06
Ambient Air Temperature For Operation-20-60 °C without derating IEC 60947-4-1, -20-60 °C without derating IEC 60947-4-1, -20-60 °C without derating IEC 60947-4-1-20-60 °C without derating IEC 60947-4-1, -20-60 °C without derating IEC 60947-4-1, -20-60 °C without derating IEC 60947-4-1
Product CompatibilityLC1D32, LC1D18, LC1D25, LC1D38
Reach Free ShvcYes
Toxic Heavy Metal FreeYes
Carbon Footprint12.917073654692109
Climatic WithstandIACS E10
Eu Rohs DirectiveCompliant
Packaging Made With Recycled CardboardYes
Reach Free Of SvhcYes
Pep CodeENVPEP0802006EN
Pcr VersionPCR-4-ed4-EN-2021 09 06
Type Of Verification For The PepIndependent internal review
General Attributes
- Product Or Component Type
- differential thermal overload relay
ETIM
- ETIM 8
- EC000106
ETIM 9EC000106
Contractual Warranty Attributes
- Warranty Period
- 18 months
Warranty18 months
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CAD
$139.20
/ EA
Available to Order
Available to Ship Same/Next Business Day if In Stock and Ordered before 12:00 PM EST
Loading dialog...
Looking to buy a large quantity?
To View Branch Inventory And Your Custom Pricing
Spec sheet
CAD$139.20/ EA
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