Overview
The LS Electric MT-32/3K thermal overload relay is a compact protection device designed for current-dependent overload monitoring in motor control circuits. With a setting range of 0.4–0.63 A, this relay provides optimum protection for low-amperage motors and systems in industrial automation and switchgear applications. Its reliable bimetallic sensing technology and proven Metasol platform make it a trusted choice for OEMs and maintenance teams seeking dependable motor protection.
Key Features
- Class 10 trip classification for fast, reliable overload detection
- Phase loss sensitivity for three-phase motor protection
- One normally closed and one normally open auxiliary contact configuration
- Direct screw terminal connection for secure wiring
- Compatible with MC-9b through MC-40a Metasol contactors for compact panel integration
- Compact size reduces load feeder footprint
Technical Specifications
- Current Setting Range: 0.4–0.63 A
- Trip Class: 10A
- Auxiliary Contacts: 1 NC (normally closed) + 1 NO (normally open)
- Terminal Type: Screw
- Degree of Protection: IP20
- Mounting: Direct mount to MC-9b, MC-12, MC-18, MC-25, MC-32, MC-40a contactors
- Sensing Technology: Bimetallic thermal element
- Overload Detection: Phase loss sensitivity enabled
Typical Applications
The MT-32/3K is ideal for:
- Low-voltage motor starter circuits (three-phase induction motors)
- Industrial automation control panels and switchboards
- Machine tool and conveyor motor protection
- Pump and fan motor overload monitoring
- OEM motor control integration
- Retrofit and upgrade applications for worn thermal relays
Compatibility & Replacements
Compatible With
- MC-9b, MC-12, MC-18, MC-25, MC-32, MC-40a Metasol contactors
- Metasol power contactors and starter assemblies
- Standard three-phase motor control circuits (50/60 Hz)
- Low-voltage switchgear and distribution panels
Replaces / Drop-In Replacement For
- Earlier LS/Metasol MT-32/3K thermal relays (same current rating)
- Equivalent Metasol thermal overload relays in the 0.4–0.63 A range
Works With
- LS Electric Metasol contactors and motor starters
- Standard three-phase 50/60 Hz supply
- Screw terminal control wiring and auxiliary circuits
- Remote reset units (as available from LS Electric)
