Square D LRD-332 TeSys Deca Th...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$263.46
Square D LRD-332 TeSys Deca Thermal Overload Relay, Class 10A EverLink

Square D LRD-332 TeSys Deca Thermal Overload Relay, Class 10A EverLink

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Model: LRD365

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

$263.46
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Square D LRD-332 TeSys Deca Thermal Overload Relay, Class 10A EverLink

The Square D TeSys Deca Thermal Overload Relay (device short name LRD) is a differential thermal overload relay built for TeSys D contactors, pairing with sizes such as LC1D50A and LC1D65A. This family is available across Motor FLA ratings from 32A to 65A, so the correct relay can be matched to the motor starter combination on hand. Rated Class 10A per IEC 60947-4-1 with a 690V AC operational voltage rating, every relay in the line uses EverLink BTR power connectors and detects over-current on the motor lines to guard against overload and phase-failure faults.

Key Features

  • Motor FLA Range: Available in ratings from 32A to 65A to match TeSys D contactor sizing needs.
  • Thermal Overload Protection: Class 10A tripping curve per IEC 60947-4-1, threshold 1.14 +/- 0.06 Ir.
  • EverLink Connectors: Power circuit uses EverLink BTR screw connectors torqued to 5 N.m; control circuit terminals torqued to 1.7 N.m.
  • Rated Operational Voltage: 690V AC (0...400 Hz) power circuit per IEC 60947-4-1.
  • Control Type: Blue push-button reset, red push-button stop.
  • Degree of Protection: IP20 per IEC 60529.
  • Ambient Operating Range: -20 to 60 °C without derating per IEC 60947-4-1.
  • Mechanical Robustness: 15 Gn/11 ms shock (IEC 60068-2-7); 4 gn vibration (IEC 60068-2-6).

Certifications & Compliance

  • UL Listed (UL 60947-4-1, UL 60947-5-1)
  • CSA Certified (C22.2 No 60947-4-1, No 60947-5-1)
  • IEC/EN 60947-4-1
  • UKCA
  • ATEX INERIS
  • DNV-GL
  • Lloyds Register of Shipping (LROS)
  • RMRS
  • CCC
  • EAC

Technical Specifications

  • Listing: UL
  • Device Short Name: LRD
  • Phase Failure Sensitivity: tripping current 130 % of Ir on two phase, the last one at 0
  • Toxic Heavy Metal Free: Yes
  • Mercury Free: Yes
  • ROHS Eur In Scope: Yes
  • Warranty: 18 months

Typical Applications

  • Motor Starter Combinations with TeSys D Contactors
  • Industrial and Commercial Motor Control Panels
  • OEM and Panel Builder Assemblies
  • Overload and Phase-Failure Motor Protection
  • Contractor and Electrician Installations

Why Square D?

Square D builds the TeSys Deca line to IEC and UL standards with EverLink connectors for a dependable power connection, backed by broad international certification (UL, CSA, IEC, UKCA, ATEX, DNV-GL) for code-compliant motor control performance across the full 32A to 65A Motor FLA range.

Manufacturer Resources

Product Specs

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

Square D LRD365 – Frequently Asked Questions

1) Which TeSys D contactors does the Square D LRD-332 overload relay mount to?
The LRD differential thermal overload relay is built to mount directly to TeSys D contactors, and the 32A to 65A ratings pair with frame sizes such as the LC1D50A and LC1D65A. It is not a standalone device, it mounts under the contactor and senses current on the motor lines.
2) What Motor FLA ratings are available in the Square D LRD TeSys Deca relay?
Three ratings: 32A (LRD332), 40A (LRD340), and 65A (LRD365). Pick the one whose adjustment range brackets the motor's full load amps as read off the motor nameplate, then set the dial to the nameplate FLA.
3) Is a Class 10A overload relay right for my motor, or do I need Class 20?
The LRD TeSys Deca relay trips to a Class 10A curve per IEC 60947-4-1, with a trip threshold of 1.14 +/- 0.06 Ir. Class 10A suits standard motors that come up to speed quickly, such as pumps, fans and compressors with normal starting duty. A long-accelerating or high-inertia load that draws starting current past the Class 10 window needs a Class 20 relay instead, or it will nuisance trip during start.
4) Will the Square D LRD relay work on a 600V motor circuit?
Yes. The power circuit is rated 690V AC at 0 to 400 Hz per IEC 60947-4-1, so 480V and 600V three-phase systems are inside the rating.
5) Is the Square D TeSys Deca LRD relay UL listed for a US control panel?
Yes, UL Listed to UL 60947-4-1 and UL 60947-5-1, and CSA Certified to C22.2 No 60947-4-1 and No 60947-5-1. It also carries UKCA, ATEX INERIS, DNV-GL, Lloyds Register, RMRS, CCC and EAC, which matters for marine and export panel builds.
6) Is the ABB TF42-16 thermal overload relay a drop-in replacement for a Square D LRD-332?
No. Both are Class 10 thermal overload relays, but they are built to mount on their own manufacturer's contactors. The Square D LRD-332 is a TeSys Deca relay designed to sit under TeSys D contactors such as the LC1D50A and LC1D65A, and its power circuit uses EverLink BTR screw connectors torqued to 5 N.m. The ABB TF42-16 belongs to ABB's TF42 series and is sized and mounted for ABB's matching contactor frame. If the panel already has a TeSys D contactor in place, stay with the LRD relay; switching brands means changing the contactor as well.
7) Does the LRD-332 protect against a lost phase, or only overload?
Both. Phase failure sensitivity is built in: with two phases loaded and the third at zero, the relay trips at 130 percent of Ir. That covers single-phasing as well as conventional over-current overload.
8) What torque do the EverLink terminals on the Square D LRD relay take?
Power circuit EverLink BTR screw connectors torque to 5 N.m; the control circuit terminals torque to 1.7 N.m. EverLink BTR is the Square D connector design, so cable prep follows the EverLink terminal, not a standard box lug.
9) Can this overload relay be installed in an unheated plant or a hot panel?
Ambient operating range is -20 to 60 degrees C with no derating, per IEC 60947-4-1. Enclosure protection is IP20 per IEC 60529, which is finger-safe but not dust or water rated, so it belongs inside a panel or enclosure.
10) What are the alternatives to the Square D LRD if I am not using a TeSys D contactor?
The LRD only bolts to TeSys D contactors, so match the relay to the contactor brand you already have. For an ABB starter, the ABB TF42-16 is a Class 10 thermal overload relay in the TF42 series. For an Eaton XT starter, the Eaton XT IEC miniature overload relay mounts direct to the contactor. Mixing brands between contactor and overload is not a supported combination.
11) What is the difference between the Square D LRD-332 and the Eaton XT IEC miniature overload relay?
They cover different ends of the motor range and different mounting ecosystems. The Eaton unit is a miniature IEC overload relay that mounts directly to Eaton XT contactors, so it suits the smaller contactor frames in that line. The Square D LRD-332 family is a TeSys Deca differential thermal relay covering Motor FLA ratings from 32A to 65A, pairing with TeSys D contactors in the LC1D50A and LC1D65A class, rated Class 10A per IEC 60947-4-1 at 690V AC. For a 32A to 65A motor already fed by a TeSys D starter, the LRD is the matched part.
12) We standardize on IEC 60947-4-1 Class 10 overloads across our panels. Which of these relays meets that?
All three are built to the IEC Class 10 thermal overload concept. The Square D LRD-332 TeSys Deca relay is rated Class 10A per IEC 60947-4-1 with a trip threshold of 1.14 +/- 0.06 Ir, is UL Listed to UL 60947-4-1 and CSA certified, and adds phase-failure sensitivity tripping at 130 percent of Ir on two phases. The ABB TF42-16 is likewise a Class 10 thermal overload relay. If the standardization also has to cover UL/CSA listing and phase-loss protection in a 690V AC circuit, the LRD line carries those specifics.
13) My motor is small and the starter is a compact IEC contactor. Should I use an LRD-332?
Probably not. The TeSys Deca LRD-332 family starts at 32A Motor FLA and runs to 65A, sized for TeSys D contactors such as the LC1D50A and LC1D65A. For a small motor on a compact contactor, a miniature-frame relay like the Eaton XT IEC miniature overload relay, which mounts directly to its matching contactor, is the shape that fits. Choose the relay that belongs to the contactor already in the enclosure.
14) How is the relay reset after a trip, and can it be stopped manually?
There are two push-buttons: a blue reset and a red stop. The operator resets at the device after the thermal element cools, and the red button opens the control circuit for a manual stop.
15) Will the LRD relay hold up on a vibrating machine or shipboard install?
Mechanical robustness is rated 15 Gn at 11 ms shock per IEC 60068-2-7 and 4 gn vibration per IEC 60068-2-6, and the line carries DNV-GL, Lloyds Register and RMRS marine approvals, which is why it shows up in shipboard and heavy machinery panels.
16) Is the TeSys Deca LRD relay RoHS compliant and free of heavy metals?
Yes, it is in scope for and compliant with European RoHS, and is declared mercury free and toxic heavy metal free, which covers most institutional and sustainable procurement screens.
How fast can I get the Square D LRD365 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 LRD365 come with a warranty?
Absolutely. The Square D LRD365 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 LRD365?
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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