Overview
The Schneider Electric LRD3359C is a TeSys Deca thermal overload relay designed to protect three-phase AC circuits against motor overloads, phase failure, prolonged stalling, and extended starting times. Rated for 48–65A at 690V AC with Class 10A protection, this bimetallic overload relay combines compact design with reliable motor protection for industrial automation applications.
Key Features
- Directly mounts to TeSys D contactors to form extremely compact starters
- Adjustable relay setting dial, test button, stop button, manual/auto reset, and trip indicator
- Simple installation using screw clamp terminals, spring terminals, ring terminals, or EverLink terminals
- Three-pole design with phase loss sensitivity and screw terminals for easy installation
- Sealable cover and 1 N.O. & 1 N.C. auxiliary contacts for independent mounting on DIN rail
- Manual or automatic reset option easily changed with dial adjustment
Technical Specifications
- Overload Adjustment Range: 48–65A
- Protection Class: 10A (IEC 60947-4-1)
- Rated Voltage (Power Circuit): 690V AC (IEC), 600V CSA/UL
- Contact Rating: 65A
- Power Dissipation: 30 kW
- Insulation Voltage: 600V
- Withstand Voltage: 6 kV
- Operating Temperature: –4 to 140°F (–20 to 60°C without derating)
- Terminal Type: Screw clamp terminals
- Conductor Cross-Section: 0.01–0.05 in² (4–35 mm²) flexible without cable sheath
- Poles: 3P
- Auxiliary Contacts: 1 N.O. + 1 N.C.
Typical Applications
- Three-phase AC motor protection in machine automation and conveyor systems
- Pump and compressor motor overload protection
- Industrial fan and blower motor circuits
- Textile, packaging, and material handling equipment
- OEM machine builders and system integrators requiring compact starter solutions
Compatibility & Replacements
Compatible With
- TeSys D and TeSys Deca contactors (LC1D50 through LC1D95)
- TeSys motor starter kits and combination starters
- Industrial control systems requiring Class 10A overload protection
- Three-phase AC motor circuits up to 30 kW
- IEC 60947-4-1 compliant installations
Replaces / Drop-In Replacement For
- Older TeSys LRD-series thermal overload relays (LRD3359 variant)
- Telemecanique thermal overload relays in the same amperage range
- Note: Verify mounting compatibility with your existing contactor model before ordering
Works With
- Schneider Electric TeSys D three-pole contactors (LC1D50, LC1D65, LC1D80, LC1D95)
- Square D motor starters and disconnects
- DIN rail mounting systems
- Screw clamp, spring, ring, and EverLink terminal blocks
- IEC 60947-4-1 standard compliant control circuits
