Product Description
LS Electric Metasol MC-22B-AC120 — 22A, 3-Pole, 120V AC Coil, 15 HP @ 460V
The LS Electric Metasol MC-22B-AC120 is a 22A, 3-pole IEC contactor with a 120V AC coil (50/60 Hz), rated at 15 HP at 460V three-phase (22A AC-3 / 40A AC-1). It includes 1 Normally Open (NO) + 1 Normally Closed (NC) auxiliary contacts built-in as standard on the side. Compatible MT-32 thermal overload relays mount directly to the bottom. The MC-22B-AC120 is the LS Electric replacement for the obsolete GMC-22 contactor. This is the 120V AC coil version — for other coil voltages, see the sibling SKUs listed in the table below.
Quick Specifications
- Part Number: MC-22B-AC120
- Current Rating: 22A AC-3 / 40A AC-1
- HP Rating: 10 HP @ 230V / 15 HP @ 460V / 20 HP @ 575V (three-phase)
- Poles: 3-pole, non-reversing
- Coil Voltage: 120V AC, 50/60 Hz
- Aux Contacts (built-in): 1 NO + 1 NC, side-mounted
- Terminal Type: Screw terminals
- Mounting: 35mm DIN rail or base mount
- Compatible Overload: MT-32 series (40AF frame), direct mount bottom
- Series: B-series (Ui=690V, Uimp=6kV, 15M mechanical operations)
- Replaces: LS Electric GMC-22 (obsolete)
- Certifications: UL, CSA, IEC 60947-4-1, CE, KS, CCC
HP Ratings by Voltage
| Supply Voltage | HP Rating | Phase |
|---|---|---|
| 230V AC | 10 HP | Three-phase |
| 460V AC | 15 HP | Three-phase |
| 575V AC | 20 HP | Three-phase |
MC-22B Coil Voltage Variants
The MC-22B is available in four coil voltages. All share identical electrical and mechanical ratings. Select the coil voltage that matches your panel’s control circuit.
| Part Number | Coil Voltage | Notes |
|---|---|---|
| MC-22B-AC24 | 24V AC, 50/60 Hz | — |
| MC-22B-AC120 (this item) | 120V AC, 50/60 Hz | Most common US panel voltage |
| MC-22B-AC240 | 240V AC, 50/60 Hz | — |
| MC-22B-DC24 | 24V DC | PLC-compatible control voltage |
LS Electric Metasol B-Series — Frame Overview
The MC-22B is the largest contactor in the LS Electric Metasol B-series. All B-series contactors share the same 45mm-wide frame and include 1 NO + 1 NC built-in side-mounted auxiliary contacts as standard. MT-32 (40AF frame) overload relays are compatible across the entire B-series. For applications above 22A, step up to the A-series beginning with the MC-32A.
| Model | AC-3 | HP @ 460V | Std Aux | Replaces |
|---|---|---|---|---|
| MC-9B | 9A | 5 HP | 1 NO + 1 NC | GMC-9 |
| MC-12B | 12A | 7.5 HP | 1 NO + 1 NC | GMC-12 |
| MC-18B | 18A | 10 HP | 1 NO + 1 NC | GMC-18 |
| MC-22B (this item) | 22A | 15 HP | 1 NO + 1 NC | GMC-22 |
| MC-32A ↑ A-series | 32A | 20 HP | 2 NO + 2 NC | GMC-32 |
Product Features
- 15 HP at 460V — Top of the B-Series: The MC-22B-AC120 is rated for 15 HP at 460V three-phase (22A AC-3) and is the largest contactor in the LS Electric Metasol B-series. It is LS Electric’s designated replacement for the obsolete GMC-22 contactor, sharing identical mounting dimensions and electrical ratings.
- 1 NO + 1 NC Auxiliary Contacts Built-In: Unlike some IEC contactors that require add-on auxiliary blocks, the MC-22B includes 1 Normally Open (NO) and 1 Normally Closed (NC) auxiliary contacts built-in as standard, side-mounted. Additional auxiliary contact blocks can be front or side-mounted for more complex control logic.
- MT-32 Overload Relay Compatible: The MT-32 series thermal overload relay (40AF frame) mounts directly to the bottom of the MC-22B-AC120 for complete motor starter protection. The MT-32 covers the current range appropriate for 22A motor loads. Select the trip range based on your motor’s nameplate full-load amperage.
- B-Series Design Ratings: The MC-22B belongs to the LS Electric Metasol B-series, rated at Ui=690V and Uimp=6kV with 15 million mechanical operations. The step up to the A-series (MC-32A and above) adds Ui=1000V, Uimp=8kV, 12 million mechanical operations, and 2 NO + 2 NC built-in aux contacts instead of 1 NO + 1 NC.
- 120V AC Coil — Fixed Coil Voltage: The MC-22B-AC120 has a fixed 120V AC (50/60 Hz) coil. This is the most common control voltage in US industrial panels. For 24V AC, 240V AC, or 24V DC applications, see the sibling variants in the coil voltage table above.
- Sealed Arc Chamber Design: The MC-22B uses a sealed arc chamber construction that contains arc flash and improves safety in enclosed panel applications. The finger-proof design meets IEC 60947 touch protection requirements.
In Stock at Kent Electrical Supply — Emmaus, PA — Same-Day Shipping on Orders Before 4:00 PM EST.
Frequently Asked Questions
What does the MC-22B-AC120 replace?
The LS Electric Metasol MC-22B-AC120 is the current replacement for the obsolete LS Electric GMC-22 contactor. The MC-22B is dimensionally compatible with the GMC-22 and uses the same MT-32 (40AF) overload relay frame. If you are replacing a GMC-22 with a 120V AC coil, the MC-22B-AC120 is the direct drop-in replacement.
What overload relay is compatible with the MC-22B-AC120?
The MC-22B-AC120 is compatible with the MT-32 series thermal overload relay (40AF frame). The MT-32 mounts directly to the bottom of the MC-22B without additional wiring or brackets. Select the MT-32 trip range that covers your motor’s nameplate full-load amperage. The MT-32 (40AF) is the correct overload frame for the entire B-series (MC-9B through MC-22B) and for the MC-32A and MC-40A as well. Call Kent Electrical Supply at 1-800-222-5129 for overload selection help.
What is the difference between the MC-22B and the MC-32A?
The MC-22B is the top of the LS Electric Metasol B-series (22A AC-3, 15 HP @ 460V, 1 NO + 1 NC built-in, Ui=690V). The MC-32A is the entry point of the A-series (32A AC-3, 20 HP @ 460V, 2 NO + 2 NC built-in, Ui=1000V, Uimp=8kV). The A-series also uses a larger overload frame. If your application requires more than 22A, 15 HP @ 460V, or more than 1 NO + 1 NC built-in auxiliary contacts, step up to the MC-32A.
Is the MC-22B-AC120 available in other coil voltages?
Yes — the MC-22B is available in four coil voltages: MC-22B-AC24 (24V AC), MC-22B-AC120 (120V AC — this item), MC-22B-AC240 (240V AC), and MC-22B-DC24 (24V DC for PLC-controlled applications). All coil variants share the same 22A AC-3 rating, 15 HP @ 460V, and 1 NO + 1 NC built-in auxiliary contacts.
Does the MC-22B-AC120 qualify for same-day shipping?
Yes — the MC-22B-AC120 is stocked at Kent Electrical Supply’s warehouse in Emmaus, PA and ships same business day when ordered before 4:00 PM EST. For MT-32 overload relays, auxiliary contact blocks, or bulk orders, call us at 1-800-222-5129 or text your RFQ to 484-425-0652.
