Schneider Electric LRD3355 TeSys Deca Thermal Overload Relay 30-40A, Class 10A, IP20

MPN: LRD3355
PPN: SCH-LRD3355

$217.80

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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 80 amp through 95 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 30 to 40 amperes. This trip current rating is calibrated per Class 10A. Multi standards certified (IEC, UL, CSA, CCC, EAC, ATEX, Marine).

Features

Engineered for seamless integration, this thermal overload relay plugs directly into the bottom of LC1D80 and LC1D95 TeSys D contactors without the need for additional wiring or mounting hardware. This "plug-and-play" design reduces installation time by up to 50%, minimizes potential wiring errors, and creates a compact, space-saving motor starter assembly inside your control cabinet.
Featuring a high-precision adjustment dial, this relay allows you to set the protection threshold exactly between 30A and 40A to match your motor's Full Load Amps (FLA). This granular control ensures your 3-phase motor is protected against subtle overheating conditions that cause insulation breakdown, effectively extending the lifespan of your expensive industrial equipment.
Built with sophisticated differential tripping technology, the LRD3355 detects phase imbalance and single-phasing conditions (phase loss) almost instantly. By cutting power the moment an unbalanced load is detected, it prevents catastrophic motor burnout a common and costly failure in industrial pump and fan applications where power quality can fluctuate.
Equipped with a blue "Reset" button and a selector for manual or automatic modes, this unit gives facility managers total control over system uptime. The manual mode forces an inspection before restart for safety, while the integrated "Test" and "Stop" functions allow technicians to simulate a trip, ensuring the control circuit is fully operational without risk to the connected load.
As a Class 10 overload, this device is designed to trip within 10 seconds of a locked-rotor condition (600% of setting), providing the ideal balance for standard industrial loads. This rapid response time protects your motor windings from the extreme heat generated during mechanical jams or heavy-load startups, ensuring compliance with UL and IEC 60947-4-1 global safety standards.

Documentation & Downloads

Specifications

Key Specifications

Country of Origin	Brazil, China, France, United States

Depth	115 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	0.72 A 500 V AC-15 signalling circuit, 0.06 A 440 V DC-13 signalling circuit
Temperature Compensation	-20-60 °C, -20-60 °C
[Ui] Rated Insulation Voltage	power circuit 1000 V IEC 60947-4-1power circuit 600 V CSA, power circuit 600 V UL
Carbon Footprint Of The Distribution Phase [A4]	0.11399705911971895, 0.1 kg CO2 eq.
Carbon Footprint Of The Installation Phase [A5]	0.06103430356206878, 0.1 kg CO2 eq.
Carbon Footprint Of The Use Phase [B2 B3 B4 B6]	2 kg CO2 eq., 1.8963357840065684
Local Publishable Date	2026-06-27
Stocking Flag	N
Device Type	Relay, Control & Measurement - Protection relay
Traceability	No
Weee Product Category	5
Eoli Availability Display	Yes
Reach Full Compliance Status	Free of Substances of Very High Concern above the threshold
Reach Compliance Directive	Free of Substances of Very High Concern above the threshold
Rohs Eur Status	Compliant
Rohs Eur Full Compliance Status	Compliant
China Rohs Label	1
Without Single Use Plastic	Yes
Tier Id	1
Function Option Id	STANDARD
Product Kit Identifier	N
Control Type	Red push-button stopBlue push-button reset
Dielectric Strength	2.2 kV 50 Hz IEC 60947-1
Network Frequency	0...400 Hz
Product Availability	Stock - Normally stocked in distribution facility
Range	TeSys
Returnability	Yes
Sustainable Packaging	Yes
Thermal Protection Adjustment Range	30-40 A
Total Lifecycle Carbon Footprint	6 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	ENVPEP1101001EN
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]	France, FR
Energy Model - Use [B6]	Electricity Mix; Low voltage; 2018; France, FR
Recyclability Potential In %	63
Width Nominal	70 mm
[Ue] Rated Operational Voltage	1000 V AC 0...400 Hz power circuit IEC 60947-4-1
Nbr. Of Units In Pkg.	1
Take-back	No
Customs Code	8536490075

Persona Type Names	End User, Contractor, Original Equipment Manufacturer, OEM - Control Panelbuilder, Panel Builder, Electrician
Market Segmentation	Commercial, Industrial
Mechanical Robustness	vibrations6 Gn IEC 60068-2-6, shocks15 Gn for 11 ms IEC 60068-2-7
Network Type	DC, AC
Product Name	TeSys LRD, TeSys Deca
Certificate Agency	IEC, UL, CSA, CCC, EAC, ATEX INERIS, UKCA
Connections - Terminals	control circuit screw clamp terminals 2 1-2.5 mm² flexible with cable endcontrol 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 End-of-life Phase [C1 To C4]	0.9 kg CO2 eq., 0.8942442055865407
Carbon Footprint Of The Manufacturing Phase [A1 To A3]	3 kg CO2 eq., 3.012824590856316
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	ENVEOLI1101001
Reach Full Compliance Status Id	NOT_CONTAINING_SVHC
Rohs Eur In Scope	Yes
Rohs Eur Conformity Date	2023
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
Relay Application	motor protection
Software Version	v6.1
Thermal Overload Class	class 10A IEC 60947-4-1
Tightening Torque	control circuit 1.7 N.m screw clamp terminalspower circuit 9 N.m screw clamp terminals
Tripping Threshold	1.14 +/- 0.06 Ir IEC 60947-4-1
R Thermal Protection Adj Range	30-40 A
Database Version	2023-02
Pcr Version	PCR-4-ed4-EN-2021 09 06
Type Of Verification For The Pep	Independent internal review
Functional-unit Description	Other 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 Unit	unit
Energy Consumption On Product Lifetime In Kwh	28.3824
Energy Model - Installation [A5]	Electricity Mix; Low voltage; 2018; France, FR
Energy Model - End Of Life [C1-c4]	Electricity Mix; Low voltage; 2018; France, FR
Height Nominal	81 mm
[Ith] Conventional Free Air Thermal Current	5 A signalling circuit
[Uimp] Rated Impulse Withstand Voltage	6 kV IEC 60947-1
Package Weight(Lbs)	498.000 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	ENVEOLI1101001
Environmental Disclosure	ENVPEP1101001EN
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 Compatibility	LC1D80, LC1D95
Reach Free Shvc	Yes
Toxic Heavy Metal Free	Yes
Carbon Footprint	5.978435943131213
Climatic Withstand	IACS E10
Eu Rohs Directive	Compliant
Packaging Made With Recycled Cardboard	Yes
Reach Free Of Svhc	Yes
Pep Code	ENVPEP1101001EN
Pcr Version	PCR-4-ed4-EN-2021 09 06
Type Of Verification For The Pep	Independent internal review