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Schneider Electric LRD3359A66 — Overload Relays

Schneider Electric LRD3359A66 TeSys Deca Thermal Overload Re

MPNLRD3359A66
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Schneider Electric TeSys Deca differential thermal overload relay, LRD3359A66, 48–65 A adjustment, Class 10A, 1000 V AC rated insulation.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

LRD3359A66 — Mechanical
ParameterValue
Width70 mm
Height81 mm
Depth115 mm

Product details

Its thermal protection adjustment range covers 48…65 A, meaning it directly matches motors drawing full-load current in that band — no external CTs or scaling needed. Rated thermal overload class 10A per IEC 60947-4-1, so it trips within 10 seconds at 7.2× Ir — fast enough to protect standard induction motors during a locked-rotor event without nuisance tripping on normal starts. Phase-failure sensitivity is built in: the relay trips at 130 % of Ir on two phases when the third drops to zero, which is the standard IEC requirement for preventing single-phasing damage.

Mounts directly under a TeSys D or TeSys F contactor, or on a DIN rail with specific accessories. The 70 mm width and 115 mm depth keep the footprint compact for dense panel layouts — no extra side clearance needed for the reset push-button. Power circuit connections use lugs-ring terminals (M10, torque 11.3 N·m); control circuit wiring uses screw-clamp terminals accepting 1…2.5 mm² flexible or solid. The 17.5 mm connection pitch aligns with standard terminal-block spacing.

Certified to IEC 60947-4-1, 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 / 14048.5 — so it is accepted in panels destined for North America, Europe, and China without additional component-level testing.

Frequently asked questions

What is the thermal adjustment range of the LRD3359A66?

The thermal protection adjustment range is 48…65 A. Set the dial to the motor's full-load current within that band.

What standards does the LRD3359A66 comply with?

It complies with IEC 60947-4-1, 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 / 14048.5. This covers most global panel certifications.

Does the LRD3359A66 provide phase-failure protection?

Yes. It trips at 130 % of Ir on two phases when the third phase current drops to zero, meeting the IEC requirement for single-phasing prevention.

MPN
LRD3359A66