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Schneider Electric LRD Thermal Overload Relay 1NO + 1NC, 12 → 18 A F.L.C, 18 A Contact Rating, 3P, TeSys

RS Stock No.:: 394-9330
Distrelec Article No.:: 136-22-712
Mfr. Part No.:: LRD21
Brand:: Schneider Electric

Schneider Electric LRD Thermal Overload Relay 1NO + 1NC, 12 → 18 A F.L.C, 18 A Contact Rating, 3P, TeSys

Subtotal (1 unit)*

£60.95

(exc. VAT)

£73.14

(inc. VAT)

FREE delivery for orders over £50.00

In Stock

42 unit(s) ready to ship
Plus 16 unit(s) ready to ship from another location
Plus 51 unit(s) shipping from 11 September 2025

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Units	Per unit
1 +	£60.95

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RS Stock No.:: 394-9330
Distrelec Article No.:: 136-22-712
Mfr. Part No.:: LRD21
Brand:: Schneider Electric

Schneider Electric Differential Thermal Overload Relays - TeSys LRD Range

Schneider Electric TeSys range of three-pole thermal overload relays have been designed and created for motor protection, phase failure, long starting times and prolonged stalling of the motor.

This range of thermal overload relays features an adjustable relay setting dial, test and stop buttons, trip indicator, sealable cover and much more. The LRD's are 3-pole thermal overloads relays that can be used to protect motors that live within an explosive environment or atmosphere, they are ATEX-certified in all connector versions.

Features & Benefits

Must be installed outside ATEX zones
Easy maintenance checks, check the tightening of cables through conducting thermographic testing and checking the mechanical operation of the product through manually operating the test, reset and stop buttons
AC and DC network types
These devices will commonly be called after their short name - LRD
Feature a rated insulating voltage of 600 V power circuit conforming to CSA, 600 V power circuit conforming to UL and 690 V power circuit conforming to IEC 60947-4-1
Network frequency of 0...400 Hz
The option to mount directly beneath a three-pole contactor, independent mounting on DIN rail with specific accessories and plate with certain accessories
Rated operational voltage is 690 V AC 0...400 Hz
The control type is a red push-button stop and blue push-button for reset mode
Temperature compensation is -20...60 °C
These products have an IP protection rating of IP20, this means that the relay is protected against solid objects up to 12 mm but has no protection against water
Standards - ATEX D 94/9/CE, EN 60947-4-1, EN 60947-5-1, IEC 60947-4-1, IEC 60947-5-1, UL 508, CSA C22.2 No 14
certifications - ATEX INERIS, BV, CCC, CSA, DNV, GL, GOST, LROS (Lloyds register of shipping), RINA, UL

Schneider Electric LRD Series Thermal Overload Relay, 12 to 18A FLC Motor Rating, 690V AC Contact Voltage Rating - LRD21

This thermal overload relay is an essential device in electrical systems, designed for the protection of motors. With a current rating of 12 to 18A, it conforms to class 10A standards, ensuring dependable operation across various applications. Compact in design, this model features dimensions of 66mm in height, 45mm in width, and 70mm in depth, making it suitable for tight installation spaces.

Features & Benefits

• Utilises screw terminals for secure connection that enhances reliability
• Automatic and manual reset options for user convenience
• Advanced thermal protection for optimal motor safeguarding
• Compatible with multiple models for versatile use
• Integrated auxiliary contacts streamline operational control
• Capable of operating at temperatures from -20°C to +60°C

Applications

• Ideal for use with motor protection systems in industrial settings
• Employed in conjunction with various electric motor models
• Suitable for AC and DC networks, enhancing flexibility in electrical designs
• Used for reliable overload protection in diverse automation

How do the automatic and manual reset functions work?

The device features a red push-button for stopping and a blue push-button for manual resetting, providing flexible options to restore normal operation after a trip due to overload conditions, ensuring safety and convenience.

What is the significance of the 3-pole configuration in this relay?

The 3-pole configuration allows for effective control of three-phase motors, enabling the unit to balance the load and ensure optimal performance, which is vital for applications in industrial automation.

Can this relay operate in high-demand environments?

Yes, it is rated for a maximum operating temperature of +60°C and designed to endure conditions such as vibrations and shocks, making it suitable for challenging industrial environments.

What kind of signalling circuits can it accommodate?

The device supports various signalling circuit currents, allowing up to 1.5A at 240V AC-15 and 0.1A at 250V DC-13, ensuring compatibility with different signalling systems for efficient motor management.

Find similar products by selecting one or more attributes.

Select all	Attribute	Value
	Brand	Schneider Electric
	FLC Motor Rating	12 → 18 A
	Contact Current Rating	18 A
	Range	TeSys
	Pole Configuration	3P
	Series	LRD
	Mounting Style	Direct Contactor
	Normal State Configuration	1NO + 1NC
	Reset Method	Automatic, Manual
	Terminal Type	Screw
	Width	45mm
	Number Of Auxiliary Contacts	2
	Depth	70mm
	Length	66mm
	Maximum Operating Temperature	+60°C
	Minimum Operating Temperature	-20°C
	Better World Product	Yes
	Operating Temperature Range	-20 → +60 °C
	Better World Verification	Green Premium
	Contact Voltage Rating	690 V ac
	Supply Voltage	690 V ac

	Select all
	Brand Schneider Electric
	FLC Motor Rating 12 → 18 A
	Contact Current Rating 18 A
	Range TeSys
	Pole Configuration 3P
	Series LRD
	Mounting Style Direct Contactor
	Normal State Configuration 1NO + 1NC
	Reset Method Automatic, Manual
	Terminal Type Screw
	Width 45mm
	Number Of Auxiliary Contacts 2
	Depth 70mm
	Length 66mm
	Maximum Operating Temperature +60°C
	Minimum Operating Temperature -20°C
	Better World Product Yes
	Operating Temperature Range -20 → +60 °C
	Better World Verification Green Premium
	Contact Voltage Rating 690 V ac
	Supply Voltage 690 V ac

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Schneider Electric LRD Thermal Overload Relay 1NO + 1NC, 12 → 18 A F.L.C, 18 A Contact Rating, 3P, TeSys

FREE delivery for orders over £50.00

Better World

Schneider Electric Differential Thermal Overload Relays - TeSys LRD Range

Features & Benefits

Schneider Electric LRD Series Thermal Overload Relay, 12 to 18A FLC Motor Rating, 690V AC Contact Voltage Rating - LRD21

Features & Benefits

Applications

How do the automatic and manual reset functions work?

What is the significance of the 3-pole configuration in this relay?

Can this relay operate in high-demand environments?

What kind of signalling circuits can it accommodate?

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