Product Description
LS Metasol MC-22b Contactor
The LS Metasol MC-22b is a 3-pole industrial contactor designed to deliver reliable motor control and protection. With a 22 AMP AC-3 rating (40 AMP AC-1), it supports up to 10 HP at 230 V and 15 HP at 460 V in 3-phase applications. This contactor features a sealed, finger-proof design to reduce arc flash exposure and is recommended as a direct replacement for the obsolete GMC-22 series.
Key Specifications & Ratings
- AMP Rating: 22 AMP (AC-3), 40 AMP (AC-1)
- Horsepower Support:
- 10 HP @ 230 V (3 Phase)
- 15 HP @ 460 V (3 Phase)
- Coil Voltage: AC-rated coil (specify voltage when ordering)
- Mounting Options: DIN rail or screw (base) mount
- Auxiliary Contacts: Comes standard with 1 normally open (1NO) and 1 normally closed (1NC) side-mounted auxiliary contact set
- Overload Relay Compatibility: Motor protective thermal overload relays can be directly attached to the bottom of the MC-22b for complete motor protection
Wiring Diagram & Installation
For a quick reference of coil connections and main terminal layouts, download the MC-22b contactor wiring diagram (PDF) or refer to the visual guide below (if provided). Proper wire gauge and torque settings must be followed to ensure safe and efficient operation. Always confirm local electrical codes and manufacturer guidelines before installation.
| AMP rating |
22 AMP AC-3 40 AMP AC-1 |
| Coil Voltage | AC rated Coil |
| Horsepower |
15 H.P. @ 460 volt 10 H.P. @ 230 volt |
| Mounting | DIN rail or base mount |
Accessories & Overload Relays
- Thermal Overload Relays: Directly mountable on the MC-22b, offering comprehensive motor protection.
- Front/Side Mountable Accessories: Choose from additional auxiliary contacts, surge suppressors, and more to customize the contactor for your application.
GMC-22 Series Replacement
LS Metasol recommends the MC-22b as a drop-in replacement for the discontinued GMC-22 series contactors. It features the same mounting footprint and enhanced safety with a sealed enclosure, making the switch straightforward and hassle-free.
Frequently Asked Questions (FAQs)
What coil voltages are available for the MC-22b?
Standard AC voltages include 110 V, 220/230 V, 460 V, etc. Please specify when placing your order.
How is AC-3 rating different from AC-1?
- AC-3 rating applies to typical induction motor loads (starting and stopping motors).
- AC-1 rating is for resistive or non-inductive loads.
This contactor is rated at 22 AMP for AC-3 and 40 AMP for AC-1.
Can I find a wiring diagram on your site?
Yes, simply click here for the MC-22b datasheet and wiring diagram, or see the “Wiring Diagram & Installation” section above.
Does the MC-22b come with built-in auxiliary contacts?
It includes a side-mounted auxiliary block with 1NO + 1NC contacts. Additional accessories are available for more complex control circuits.
Is this contactor compatible with the GMC-22 series mounting holes?
Absolutely. The MC-22b was designed as a direct replacement for the GMC-22 with the same dimensions and mounting pattern.
Ready to upgrade or replace your GMC-22 series? Order the LS Metasol MC-22b today or Contact Us to speak with an electrical specialist for personalized advice.
