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Schneider Electric LR3D3357

Schneider LR3D3357 TeSys non-differential thermal overload relay

MPNLR3D3357
Obsolete

Schneider LR3D3357 Solid State Overload Relays — now discontinued. Supplied from remaining channel stock; full specifications, lifecycle and same-series options are below.

$299.76Ref. price · indicative, final on quote
Schneider Electric LR3D3357 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LR3D3357 key specifications
ParameterValue
Control typeRed push-button stop Blue push-button reset
Network typeDC AC
Product or component typeNon differential thermal overload relay
Climatic withstandIACS E10
VoltagePower circuit 1000 V IEC 60947-4-1 Power circuit 600 V CSA Power circuit 600 V UL
[Ue] rated operational voltage1000 V AC 0...400 Hz power circuit IEC 60947-4-1
[Uimp] rated impulse withstand voltage6 kV IEC 60947-1
Permissible current0.72 A 500 V AC-15 signalling circuit 0.06 A 440 V DC-13 signalling circuit
[Ith] conventional free air thermal current5 A signalling circuit
Network frequency0...400 Hz
Phase failure sensitivityTripping current 130 % of Ir on two phase, the last one at 0
IP degree of protectionIP20 conforming to IEC 60529

All specifications

LR3D3357 additional specifications
ParameterValue
Mounting supportPlate, with specific accessories Rail, with specific accessories Under contactor
Connections - terminalsPower circuit screw clamp terminals 1 0.006...0.05 in² (4...35 mm²) flexible without cable end Power circuit screw clamp terminals 1 0.006...0.05 in² (4...35 mm²) flexible with cable end Power circuit screw clamp terminals 1 0.006...0.05 in² (4...35 mm²) solid without cable end Control circuit screw clamp terminals 2 0.002...0.004 in² (1...2.5 mm²) flexible without cable end Control circuit screw clamp terminals 2 0.002...0.004 in² (1...2.5 mm²) flexible with cable end Control circuit screw clamp terminals 2 0.002...0.004 in² (1...2.5 mm²) solid without cable end
Depth4.5 in (115 mm)
Width2.8 in (70 mm)
Height3.2 in (81 mm)
StandardsEN/IEC 60947-4-1 EN/IEC 60947-5-1 UL 60947-4-1 UL 60947-5-1 CSA C22.2 No 60947-4-1 CSA C22.2 No 60947-5-1 GB/T 14048.4 GB/T 14048.5 EN 50495
RangeTeSys
CategoryUS10I1222347
Flame retardanceV1 conforming to UL 94
Device short nameLR3D
Relay applicationMotor protection
Tightening torqueControl circuit 15.05 lbf.in (1.7 N.m) screw clamp terminals Power circuit 79.7 lbf.in (9 N.m) screw clamp terminals
Tripping threshold1.14 +/- 0.06 Ir IEC 60947-4-1
Dielectric strength2.2 kV 50 Hz IEC 60947-1
Mechanical robustnessVibrations6 Gn IEC 60068-2-6 Shocks15 Gn for 11 ms IEC 60068-2-7
Associated fuse rating4 A gG for signalling circuit 4 A BS for signalling circuit
Thermal overload classClass 10A IEC 60947-4-1
Temperature compensation-4...140 °F (-20...60 °C)
Auxiliary contact composition1 NO + 1 NC
Ambient air temperature for storage-76...158 °F (-60...70 °C)
Thermal protection adjustment range37...50 A
Ambient air temperature for operation-4...140 °F (-20...60 °C) without derating IEC 60947-4-1

Product details

Overview

The LR3D3357 is a Schneider TeSys non-differential thermal overload relay rated for 1000 V and IP20, with 1 NO + 1 NC auxiliary contacts. It mounts directly to LC1D95 or LC1D80 contactors and uses screw clamp terminals on both power and control circuits.

Compliance & certifications

Carries IEC, UL, CSA, CCC, EAC, BV, DNV-GL, LROS, ATEX, and INERIS certifications, and complies with EN/IEC 60947-4-1, EN/IEC 60947-5-1, UL 60947-4-1, UL 60947-5-1, CSA C22.2 No 60947-4-1, CSA C22.2 No 60947-5-1, GB/T 14048.4, GB/T 14048.5, and EN 50495. Also listed under California Proposition 65.

MPN
LR3D3357