GMC Contactor Series

The GMC Contactor Series is a family of low-voltage AC contactors designed for frequent switching and control of electrical loads in industrial, commercial, and automation environments. These contactors are used to switch AC motors, lighting, resistive loads, and heating circuits, offering high mechanical endurance and compliance with IEC 60947-4-1 / GB 14048.4 standards. The series supports multiple control coil voltages and auxiliary configurations, providing flexibility for control panels, motor starters, HVAC systems, and general power switching applications.

Technical Specifications (Standard GMC Family)

Model Identification

Specification	Details
Series	GMC Contactor
Product Type	AC Contactor
Standards Compliance	IEC 60947-4-1 / GB 14048.4
Mounting	Panel mount / DIN rail adapter
Control Type	AC coil

Electrical Ratings

Parameter	Specification
Control (Coil) Voltage	AC 24 V, AC 36 V, AC 110 V, AC 220 V, AC 380 V (50/60 Hz)
Rated Operational Voltage (Main)	Up to 690 V AC
Rated Insulation Voltage (Ui)	1000 V AC
Rated Impulse Withstand Voltage (Uimp)	6 kV
Operating Frequency	50 / 60 Hz
Utilization Categories	AC-3 / AC-4
Poles	1P, 2P, 3P, 4P (model dependent)

Main Contact Ratings

Model	Poles	AC-3 Rated Current	AC-4 Rated Current	Typical Use
GMC9	3P	9 A	6 A	Small motors / lighting
GMC12	3P	12 A	8 A	Small motor loads
GMC18	3P	18 A	12 A	Medium motors
GMC25	3P	25 A	16 A	Industrial motors
GMC32	3P	32 A	20 A	Medium-high loads
GMC40	3P	40 A	25 A	Heavier loads
GMC50	3P	50 A	32 A	High current motors
GMC65	3P	65 A	40 A	Larger motor circuits

Control Coil Data

Coil Voltage	Frequency
AC 24 V	50 / 60 Hz
AC 36 V	50 / 60 Hz
AC 110 V	50 / 60 Hz
AC 220 V	50 / 60 Hz
AC 380 V	50 / 60 Hz

Coil power consumption (VA) depends on model and voltage. Consult specific datasheet for exact coil consumption.

Auxiliary Contacts & Add-Ons

Accessory	Function
Auxiliary Contact Blocks (1NO/1NC)	Contact status signal
Mechanical Interlock Kits	Prevents simultaneous closure of multiple contactors
RC Snubber / Surge Suppressor	Reduces coil switching spikes
DIN Rail Adapter	Enables DIN-rail installation
Thermal Overload Relay (paired)	Protects motor against overload

Mechanical & Environmental

Parameter	Specification
Mechanical Life	≥ 10⁷ operations
Electrical Life (AC-3)	≥ 10⁵ operations
Operating Temperature Range	−5 °C … +40 °C
Humidity	≤ 90 % (non-condensing)
Mounting	Panel / DIN rail (adapter)
Terminal Type	Screw / bolt clamps
Protection Degree	IP20 (typical when panel installed)

Typical Pole / Load Table

Model Code	Poles	AC-3 Rated Current	AC-4 Rated Current	Application
GMC9	3P	9 A	6 A	Small motor / lighting
GMC12	3P	12 A	8 A	Small motor control
GMC18	3P	18 A	12 A	Medium motor
GMC25	3P	25 A	16 A	Industrial motors
GMC32	3P	32 A	20 A	Mid-range loads
GMC40	3P	40 A	25 A	Heavy loads
GMC50	3P	50 A	32 A	High current circuits
GMC65	3P	65 A	40 A	Large motors & loads