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Schneider Electric LR3D1508 — Overload Relays

TeSys LR3D1508 thermal overload relay, 2.5...4 A, obsolete

MPNLR3D1508
Obsolete

TeSys LRD thermal overload relay, LR3D1508, 2.5...4 A adjustment range, Class 20, non-differential, 1 NO + 1 NC auxiliary contacts.

Schneider Electric LR3D1508 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LR3D1508 — Mechanical
ParameterValue
Width1.8 in (45 mm)
Depth3.6 in (92 mm)

Product details

The TeSys LRD LR3D1508 is a non-differential thermal overload relay for motor protection, with a thermal protection adjustment range of 2.5...4 A and a Class 20 tripping curve per IEC 60947-4-1. It provides phase-failure sensitivity, tripping at 130 % of the set current Ir when one phase drops to zero, and includes a 1 NO + 1 NC auxiliary contact configuration. Rated for use on AC or DC control circuits up to 690 V AC (0...400 Hz) on the power circuit, with an insulation voltage rating of 600 V (UL/CSA) and 690 V (IEC).

This part is now obsolete per the manufacturer's lifecycle status.

Screw-clamp terminals accept power conductors up to 10 mm² flexible (without cable end) and control conductors up to 2.5 mm². Tightening torque is 1.85 N·m on the power circuit and 1.7 N·m on the control circuit.

Listed to 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, and GB/T 14048.4/5. Flame retardance rated V1 per UL 94.

Frequently asked questions

What replaces the LR3D1508?

No official successor order code is provided in the manufacturer's lifecycle data. For a BOM that requires this exact setting range and Class 20 curve, the remaining supply is sourced through surplus and last-time-buy channels.

What are the key ratings of the LR3D1508?

Thermal protection adjustment range 2.5...4 A, Class 20 tripping class, 1 NO + 1 NC auxiliary contacts, phase-failure sensitive, rated operational voltage 690 V AC on the power circuit.

What compliance documentation does this brand provide for the LR3D1508?

The relay carries UL, CSA, IEC, and GB/T standards listings as detailed in the spec table. Flame retardance is V1 per UL 94.

MPN
LR3D1508