Square D LRD TeSys Deca Class ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$158.40
Square D LRD TeSys Deca Class 20 Thermal Overload Relay

Square D LRD TeSys Deca Class 20 Thermal Overload Relay

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Model: LRD10L

In Stock (leaves warehouse same day if ordered before 3pm ET)

$158.40
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Square D LRD TeSys Deca Class 20 Thermal Overload Relay

The Square D TeSys Deca (LRD) thermal overload relay family delivers reliable motor protection for use with compatible TeSys D contactors such as LC1D09, LC1D12, LC1D18, LC1D25, LC1D32, and LC1D38. This relay line is available in Motor FLA (full load amp) ratings from 2.5A to 13A across four adjustment ranges — 2.5...4A, 4...6A, 5.5...8A, and 9...13A — allowing precise sizing to the connected motor. Built to a Class 20 tripping profile per IEC 60947-4-1, every relay in the TeSys Deca line shares thermal overload protection, phase unbalance sensitivity, an IP20 degree of protection, and a rated operational voltage (Ue) of 690V AC over a 0...400 Hz range, making it a dependable choice for industrial and commercial motor control circuits.

Key Features

  • Motor FLA Range: Select from 2.5...4A, 4...6A, 5.5...8A, or 9...13A adjustment bands to match the protected motor's full load current.
  • Tripping Class: Class 20 thermal overload tripping conforming to IEC 60947-4-1 for standard motor starting duty.
  • Rated Voltage: Ue 690V AC (0...400 Hz) power circuit; Ui rated insulation voltage of 600V CSA, 600V UL, and 690V per IEC 60947-4-1.
  • Degree of Protection: IP20 conforming to IEC 60529 for protection against solid foreign objects and finger contact.
  • Manual Control: Integrated red push-button stop and blue push-button reset for fast, tool-free operator control.
  • Contactor Compatibility: Designed to mount with TeSys D contactors including LC1D09, LC1D12, LC1D18, LC1D25, LC1D32, and LC1D38.
  • Network Type: Suitable for both AC and DC network applications.
  • Mounting Support: Mounts under the contactor, or on a plate or rail with specific accessories.
  • Tripping Threshold: 1.14 +/- 0.06 Ir per IEC 60947-4-1, with phase failure sensitivity tripping at 130% of Ir when one phase drops to 0.

Certifications & Compliance

  • UL Listed and CSA Certified
  • IEC 60947-4-1 and EN/IEC 60947-4-1 compliant
  • UL 60947-5-1 and EN/IEC 60947-5-1 compliant
  • CSA C22.2 No 60947-4-1 and No 60947-5-1
  • ATEX INERIS, EAC, ABS, and UKCA certified
  • EN 50495 compliant

Technical Specifications

  • Voltage Rating: 690V
  • Toxic Heavy Metal Free: Yes
  • Warranty: 18 months
  • Mercury Free: Yes
  • Sustainable Packaging: Yes
  • Compatibility Code: LRD
  • Country of Origin: Thailand
  • Climatic Withstand: IACS E10

Typical Applications

  • Motor Overload Protection for TeSys D Contactors
  • Industrial Motor Control Panels and Motor Control Centers
  • Commercial and Industrial Electrical Installations
  • Control Circuit and Panelboard Wiring
  • New Construction and Motor Control Retrofits

Why Square D?

Square D's TeSys Deca relays are engineered to recognized IEC, UL, and CSA standards, giving electrical professionals a thermal overload solution built for consistent, code-compliant motor protection across a full range of Motor FLA ratings. With sustainable packaging, a mercury-free and toxic heavy metal-free construction, and an 18-month warranty, this TeSys Deca relay family is a dependable addition to any TeSys D-based motor control installation.

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Manufacturer Resources

Product Specs

Product Type:
Overload Relay
Series:
TeSys Deca
Voltage Rating:
690V
Listing:
UL Listed
Standards:
IEC 60947-4-1
Department:
Electrical
Product Group:
Motor Control & Automation
Product Subgroup:
Overload Relays

Square D LRD10L – Frequently Asked Questions

1) Which TeSys D contactors will the Square D LRD overload relay mount to?
The LRD TeSys Deca relay mounts directly under TeSys D contactors including the LC1D09, LC1D12, LC1D18, LC1D25, LC1D32 and LC1D38. If you aren't mounting it under the contactor, it can also go on a plate or on rail with the specific mounting accessories.
2) How do I pick the right LRD relay for my motor's full load amps?
Pick the adjustment band that brackets the motor nameplate FLA, then dial the relay to the actual FLA. Four bands cover 2.5 to 13A: LRD08L is 2.5 to 4A, LRD10L is 4 to 6A, LRD12L is 5.5 to 8A, and LRD16L is 9 to 13A. Note the gap between 8A and 9A, so a motor drawing 8.5A isn't covered by these four.
3) Can I use the Square D LRD relay on a 575V or 600V motor circuit?
Yes. Rated operational voltage is 690V AC over 0 to 400 Hz, so 480V, 575V and 600V three-phase circuits are all inside the rating. Rated insulation voltage is 600V UL, 600V CSA and 690V to IEC 60947-4-1.
4) Will a UL inspector accept this relay in a motor control panel?
The LRD relay is UL Listed and CSA Certified, and built to IEC 60947-4-1 and EN/IEC 60947-4-1, plus UL 60947-5-1 and CSA C22.2 No 60947-4-1 and No 60947-5-1 for the control contacts. It also carries ATEX INERIS, EAC, ABS and UKCA certification and complies with EN 50495.
5) What is the difference between the Square D LRD TeSys Deca relay and the ABB TF42-16 thermal overload relay?
Both are thermal overload relays, but they differ in tripping class and the contactor line they pair with. The Square D LRD TeSys Deca is a Class 20 relay built to IEC 60947-4-1, rated 690V, and designed to mount under TeSys D contactors such as LC1D09 through LC1D38. The ABB TF42-16 is a Class 10 relay in ABB's TF42 series, so it follows a faster tripping profile for the same overload and belongs to ABB's own contactor family. If the panel is built on TeSys D contactors and the motor needs the longer Class 20 start allowance, the LRD is the matching part.
6) Can I use an ABB TF42-16 relay in place of a Square D LRD on a TeSys D contactor?
No - treat them as different platforms rather than drop-in equivalents. The Square D LRD TeSys Deca is designed to mount with TeSys D contactors such as LC1D09, LC1D12, LC1D18, LC1D25, LC1D32, and LC1D38, and its Class 20 trip curve is matched to that pairing. The ABB TF42-16 is a Class 10 relay from ABB's TF42 series and is intended for ABB's own contactor mounting. Keep the relay and contactor within the same family, and if the specification calls for Class 20 tripping, the TF42-16's Class 10 rating does not satisfy it.
7) Is a Class 20 overload relay right for my motor, or do I need Class 10?
Class 20 gives a longer trip time at a given overload than Class 10, so it suits motors with higher inertia or a longer run-up. The LRD relays here are Class 20 per IEC 60947-4-1. If your starter spec calls for Class 10 instead, the ABB TF42-16 thermal overload relay is a Class 10 unit.
8) Does this Square D overload relay protect against a lost phase?
It does. The LRD TeSys Deca relay is phase-failure sensitive and will trip at 130% of the set current (Ir) if one phase drops to zero. Normal overload tripping threshold is 1.14 +/- 0.06 Ir per IEC 60947-4-1.
9) Does this overload relay need an enclosure?
Yes, for most installations. The LRD relay is IP20 to IEC 60529, which protects against solid objects and finger contact but not water or dust, so it belongs inside a panel or enclosure. It's rated IACS E10 for climatic withstand.
10) What's an alternative if I'm not using TeSys D contactors?
The LRD is built to pair with TeSys D contactors, so on another contactor line you'd want the matching relay for that brand. The Eaton XT IEC miniature overload relay mounts direct-to-contactor on Eaton's XT line, and ABB's TF42 series serves ABB contactors.
11) I need a smaller overload relay that mounts straight onto the contactor - is there an alternative to the Square D LRD?
Yes. The Eaton XT IEC miniature overload relay is built for direct-to-contactor mounting and is the more compact option when panel space is tight. The Square D LRD TeSys Deca also mounts under the contactor, or on a plate or rail with the right accessories, but it is dimensioned for the TeSys D line and pairs with contactors like LC1D09 through LC1D38. Choose by the contactor already in the panel: the LRD for TeSys D, the Eaton XT for Eaton XT contactors.
12) My motor has a long acceleration time - which overload relay suits it better, the Square D LRD or a Class 10 unit?
A longer-accelerating motor generally needs the more tolerant trip curve. The Square D LRD TeSys Deca is a Class 20 relay conforming to IEC 60947-4-1, with a tripping threshold of 1.14 +/- 0.06 Ir and adjustment bands of 2.5...4A, 4...6A, 5.5...8A, and 9...13A so it can be dialed to the motor's full load current. The ABB TF42-16 is a Class 10 relay, which trips sooner on the same sustained overload. For standard starting duty where a faster trip is wanted, Class 10 is the tighter choice; for extended starts within the 2.5A to 13A range, the Class 20 LRD is the match.
13) How does an operator reset the LRD relay after a trip?
There are two integrated push-buttons on the relay face: a red stop and a blue reset. No tools needed, so a panel technician can clear a trip at the relay.
14) Can the LRD overload relay be used on DC circuits?
Yes, the TeSys Deca LRD is suited to both AC and DC network applications. The 690V operational rating is stated for AC over 0 to 400 Hz.
15) Does the Square D LRD relay meet green procurement requirements?
For sustainability-minded specs, the relay is mercury free and free of toxic heavy metals, and ships in sustainable packaging. Country of origin is Thailand.
How fast can I get the Square D LRD10L delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Square D LRD10L come with a warranty?
Absolutely. The Square D LRD10L is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Square D LRD10L?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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