Schneider Electric LR2K0312 TeSys K Differential Thermal Overload Relay 3.7-5.5A Class 10A

MPN: LR2K0312
PPN: SCH-LR2K0312
UNSPSC: 39122330

$65.34

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Description

TeSys K overload relays are designed to be used with TeSys K contactors to make a motor starter. 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 3.7 to 5.5 amperes. This trip current rating is calibrated per Class 10A. Mounting on DIN rail, separated from the contactor, with use of a terminal block LA7K0064 (to be ordered separately). Multi standards certified (IEC, UL, CSA, CCC, EAC).

Features

Featuring a calibrated bimetallic dial adjustable from 3.7 to 5.5 Amps, this thermal overload relay allows commercial electricians to fine-tune protection exactly to a motor's nameplate FLA (Full Load Amps). This precision calibration prevents unnecessary nuisance tripping during startup cycles while ensuring tight, highly reliable protection against sustained overcurrent conditions on small pumps, fans, and conveyor drives.
Designed for seamless mechanical integration, this relay mounts directly to the underside of Schneider Electric TeSys K-Series mini-contactors (LC1K, LP1K). This plug-and-play architecture forms a compact, space-saving motor starter assembly that completely eliminates the need for interconnecting wires, reducing enclosure clutter and cutting labor time for panel builders.
This versatile relay features a selectable manual or automatic reset selector, allowing maintenance teams to configure safe system recovery workflows such as requiring a technician to physically check a machine before restarting or allowing automated systems to cycle back online safely. A front-accessible test button is also integrated, letting operators manually trip the mechanism to verify auxiliary control wiring and signaling circuits during routine maintenance.
Outfitted with built-in, isolated 1 Normally Open (NO) and 1 Normally Closed (NC) auxiliary contacts, this relay effortlessly bridges the gap between power protection and control logic. The NC contact instantly breaks the contactor coil circuit upon an overload event to stop the motor, while the NO contact simultaneously closes to trigger an alarm pilot light or send a fault input signal to an upstream PLC or automation controller.

Documentation & Downloads

Specifications

Key Specifications

Country of Origin	Czechia
Depth	65 mm

Weight	185 g

Complementary Attributes

Ue Rated Operational Voltage	<= 690 V power circuit, <= 690 V power circuit<= 690 V power circuit, <= 690 V power circuit690 V AC AC-15 signalling circuit, 250 V DC DC-13 signalling circuit
Uimp Rated Impulse Withstand Voltage	6 kV

Ui Rated Insulation Voltage	power circuit 690 V BS 4941, power circuit 690 V IEC 60947power circuit 750 V VDE 0110 group Cpower circuit 600 V CSA C22.2 No 14

Important Information Attributes

Persona Type Ids	EU, LC, OM, OM8, PB, SC
Market Segmentation Id	COMMERCIAL, INDUSTRIAL
Associated Fuse Rating	6 A gG for signalling circuit conforming to VDE 0660, 6 A gG for signalling circuit conforming to IEC 60947
Flame Retardance	V1 conforming to UL 94requirement 2 conforming to NF F 16-101, requirement 2 conforming to NF F 16-102
Mounting Support	under contactorplate, with specific accessories, rail, with specific accessories
Network Type	DC, AC
Tightening Torque	1.3 N.m screw clamp terminals Philips No 2, 1.3 N.m screw clamp terminals flat Ø 6 mm, 1.3 N.m screw clamp terminals pozidriv No 2
Certificate Agency	UL, CSA, UKCA
Carbon Footprint Of The End Of Life Phase C1 To C4	0.029006, 0 kg CO2 eq.
Carbon Footprint Of The Manufacturing Phase A1 To A3	0.9 kg CO2 eq., 0.87503
Local Data Status	Publishable
Return Indicator	Y
Serviceability	No
Use Carbon Footprint	3.2446
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	2
Function Option Id	STANDARD
Product Kit Identifier	N
Device Short Name	LR2K
Local Signalling	trip indicator Yellow)
Power Dissipation Per Pole	2 W
Product Name	TeSys LRK
Range	TeSys
Relay Application	motor protection
Software Version	EIME v5.9.4
Thermal Overload Class	class 10A IEC 60947-4-1
Total Lifecycle Carbon Footprint	4 kg CO2 eq.
R Thermal Protection Adj Range	3.7-5.5 A
Data Source	referent product
Width Nominal	45 mm
Customs Code	8536490050
Carbon Footprint Kg Co2 Eq Total Life Cycle	4.1732
Packaging Weight In G	12.8
Functional Unit Quantity	1
Reference Lifetime In Y	20

Persona Type Names	End User, Contractor, Original Equipment Manufacturer, OEM - Control Panelbuilder, Panel Builder, Electrician
Market Segmentation	Commercial, Industrial
Control Type	Red push-button trip test functionBlue push-button stop and manual reset, selector switch manual or automatic reset
Mechanical Robustness	vibrations NC contact2 Gn, 5...300 Hz IEC 60068-2-6, shocks NO contact10 Gn for 11 ms IEC 60068-2-27, shocks NC contact10 Gn for 11 ms IEC 60068-2-27, vibrations NO contact2 Gn, 5...300 Hz IEC 60068-2-6
Network Frequency	<= 400 Hz, <= 400 Hz
Protective Treatment	TC IEC 60068, TC DIN 50016
Connections Terminals	screw clamp terminals 2 0.75-4 mm²flexible without cable endscrew clamp terminals 2 0.34-1.5 mm²flexible with cable end, screw clamp terminals 1 1.5-4 mm²solid, screw clamp terminals 2 1.5-4 mm²solid, screw clamp terminals 1 0.75-4 mm²flexible without cable endscrew clamp terminals 1 0.34-2.5 mm²flexible with cable end
Carbon Footprint Of The Distribution Phase A4	0.023869, 0 kg CO2 eq.
Carbon Footprint Of The Installation Phase A5	0 kg CO2 eq., 0.00069278
Carbon Footprint Of The Use Phase B2 B3 B4 B6	3 kg CO2 eq., 3.2446
Local Publishable Date	2026-06-27
Device Type	Relay, Control & Measurement - Protection relay
Traceability	No
Weee Scope	In
Scope Perimeter	At least in Europe
End Of Life Doc Ref	ENVEOLI2211018
Reach Full Compliance Status Id	NOT_CONTAINING_SVHC
Rohs Eur In Scope	Yes
Rohs Eur Conformity Date	0702
China Rohs In Scope	No
With Recycled Cardboard	Yes
Product Contributes To Saved And Avoided Emissions	No
Tier	2
Function Option	Standard
Compatibility Code	LR2K
Fire Resistance	850 °C IEC 60695-2-1
Phase Failure Sensitivity	yes IEC 60947-4-1
Product Availability	Stock - Normally stocked in distribution facility
Product Or Component Type	differential thermal overload relay
Range Of Product	TeSys K thermal overload relays
Returnability	Yes
Sustainable Packaging	Yes
Thermal Protection Adjustment Range	3.7-5.5 A
Weee Label	The product must be disposed on European Union markets following specific waste collection and never end up in rubbish bins.
Database Version	2022-11
Height Nominal	58 mm
Nbr. Of Units In Pkg.	1
Ith Conventional Free Air Thermal Current	6 A signalling circuit
Warranty In Months	18
Functional Unit Description	The functional unit of the LR2K0312 is to detect overload currents in order to protect the load for 20 years. Standardized product characteristics to provide:& 10rated insulation voltage：690V& 10conventional free air thermal current:6A & 10rated operational voltage:690V AC& 10rated impulse withstand voltage:6KV& 10thermal protection adjustment range:3.7-5.5A& 10thermal overload class：10A
Functional Unit Unit	unit
Recyclability Potential In %	47

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	-40-70 °C, -40-70 °C
Take Back	No
Recycled Metal Content At Cr Level	0 %
Mercury Free	Yes
Circularity Profile	ENVEOLI2211018
Eu Rohs Directive	Compliant
Operating Altitude	6561.68 ft (2000 m) without derating
Packaging Without Single Use Plastic	Yes
Reach Regulation	Free of Substances of Very High Concern above the threshold
Pep Verification Date	2023-01-17
Psr Version	PSR-0005-ed2-EN-2016 03 29

Ambient Air Temperature For Operation	-20-55 °C without derating IEC 60947, -20-55 °C without derating IEC 60947, -20-55 °C without derating IEC 60947, -30-60 °C with derating IEC 60947, -30-60 °C with derating IEC 60947, -30-60 °C with derating IEC 60947-20-55 °C without derating IEC 60947, -20-55 °C without derating IEC 60947, -20-55 °C without derating IEC 60947, -30-60 °C with derating IEC 60947, -30-60 °C with derating IEC 60947
Product Compatibility	LC7K, LP1K, LP4K, LC1K
Reach Free Shvc	Yes
Toxic Heavy Metal Free	Yes
Carbon Footprint	4.1732
Environmental Disclosure	ENVPEP2211018EN
Ip Degree Of Protection	IP2X conforming to IEC 60529
Packaging Made With Recycled Cardboard	Yes
Reach Free Of Svhc	Yes
Pep Code	ENVPEP2211018EN
Pcr Version	PCR-ed3-EN-2015 04 02
Type Of Verification For The Pep	Independent internal review