Product Description
LS Electric MC-32A Metasol Contactor — 32A, 3-Pole, 20 HP @ 460V
The LS Electric MC-32A is a 32A, 3-pole IEC contactor from the Metasol MC series. Rated at 20 HP at 460V three-phase (32A AC-3 / 50A AC-1), the MC-32A includes 2 Normally Open (NO) + 2 Normally Closed (NC) built-in auxiliary contacts provided as two side-mounted blocks. It mounts on 35mm DIN rail or panel backplate and uses screw clamp terminals. LS Electric recommends the MC-32A as the direct replacement for the obsolete GMC-32 series. The compatible overload relay is the MT-32, which mounts directly to the contactor load terminals. Choose your coil voltage using the variant selector above.
Quick Specifications
- Current Rating: 32A AC-3 / 50A AC-1
- HP Rating: 10 HP @ 230V / 20 HP @ 460V / 25 HP @ 575V (three-phase)
- Poles: 3-pole, non-reversing
- Coil Voltage: Selected by suffix — see table below
- Full Catalog Number Format: MC-32A-22-[coil] (22 = 2 NO + 2 NC)
- Aux Contacts (built-in): 2 NO + 2 NC (two side-mounted blocks, 1 NO + 1 NC each)
- Terminal Type: Screw clamp, power and control
- Wire Range: 12–8 AWG, 2 conductor maximum
- Mounting: 35mm DIN rail or screw panel mount
- Operating Rate: Up to 1,800 cycles/hour (AC-3)
- Mechanical Durability: 12,000,000 operations
- Electrical Durability: 2,000,000 operations
- Compatible Overload: MT-32 series (direct mount, full current range 0.1–40A)
- Replaces: LS Electric GMC-32 series (obsolete)
- Weight: 1.3 lbs
- Certifications: UL508 (File E108780/E206826), CE, RoHS
MC-32A Coil Voltage Variants
| Part Number | Coil Voltage | Coil Type |
|---|---|---|
| MC-32A-AC24 | 24V AC, 50/60 Hz | AC |
| MC-32A-DC24 | 24V DC | DC |
| MC-32A-AC120 | 120V AC, 60 Hz | AC — Most Common US |
| MC-32A-AC240 | 240V AC, 60 Hz | AC |
| MC-32A-AC480 | 480V AC, 60 Hz | AC |
Not sure which coil voltage to order? Call Kent Electrical Supply at 1-800-222-5129 or text your RFQ to 484-425-0652.
HP Ratings by Voltage
| Supply Voltage | HP Rating | Phase |
|---|---|---|
| 115V AC | 2 HP | Single-phase |
| 230V AC | 5 HP | Single-phase |
| 200V AC | 7.5 HP | Three-phase |
| 230V AC | 10 HP | Three-phase |
| 460V AC | 20 HP | Three-phase |
| 575V AC | 25 HP | Three-phase |
LS Electric MC Series — Frame Comparison
| Model | AC-3 | HP @ 460V | Aux (built-in) | Overload | Replaces |
|---|---|---|---|---|---|
| MC-32A (this item) | 32A | 20 HP | 2 NO + 2 NC | MT-32 | GMC-32 |
| MC-40A | 40A | 30 HP | 2 NO + 2 NC | MT-32 | GMC-40 |
| MC-85A | 85A | 60 HP | 2 NO + 2 NC | MT-95 | GMC-85 |
Product Features
- 20 HP at 460V: The MC-32A is rated for 20 HP at 460V three-phase (32A AC-3 / 50A AC-1). It is suitable for motor starters in pumps, fans, conveyors, compressors, and general industrial applications. Note: some distributor listings incorrectly show 15 HP at 460V — the correct rating per LS Electric’s catalog is 20 HP.
- 2 NO + 2 NC Built-In Auxiliary Contacts: The MC-32A ships standard with two side-mounted auxiliary contact blocks, each providing 1 NO + 1 NC — for a total of 2 NO + 2 NC. The full catalog number format is MC-32A-22-AC120, where the “22” designates 2 NO + 2 NC. Additional front-mount auxiliary blocks are available for expanded control requirements.
- MT-32 Overload Relay Compatible: The MT-32 series thermal overload relay mounts directly to the T1-T2-T3 load terminals of the MC-32A for a complete, wiring-free motor starter assembly. The MT-32 covers the full current range from 0.1A to 40A across its various range selections. The same MT-32 overload family is compatible with the smaller MC-9B through MC-22B contactors and the larger MC-40A — making it a versatile single overload relay series for a wide range of motor starter sizes.
- Direct GMC-32 Replacement: LS Electric designates the MC-32A as the manufacturer-recommended replacement for the obsolete GMC-32 series. The MC-32A is the current-production successor, maintaining the same 32A AC-3 rating and 3-pole configuration.
- High Mechanical and Electrical Endurance: Rated for 12,000,000 mechanical operations and 2,000,000 electrical operations, the MC-32A is designed for frequent-cycling motor control in demanding industrial environments. Maximum operating rate is 1,800 cycles per hour under AC-3 duty.
- Screw Clamp Terminals: Both power and control circuit connections use screw clamp terminals. Wire range: 12–8 AWG, 2 conductor maximum. Finger-proof terminal design standard. DIN rail or panel backplate mounting.
- UL508 Listed — Industrial Control Equipment: The MC-32A is UL508 listed (File E108780/E206826), CE marked, and RoHS compliant. Rated insulation voltage Ui = 1000V; impulse withstand voltage Uimp = 8 kV; operational voltage Ue = 690V.
Stock Item – Order before 4:00 PM EST for Same-Day Shipping.
Frequently Asked Questions
What is the HP rating of the MC-32A at 460V?
The MC-32A is rated 20 HP at 460V three-phase (32A AC-3). It is also rated 25 HP at 575V, 10 HP at 230V, and 7.5 HP at 200V three-phase. Some distributor listings incorrectly show 15 HP at 460V — the correct rating per LS Electric’s catalog and spec sheet is 20 HP.
Is the MC-32A a replacement for the GMC-32?
Yes — LS Electric designates the MC-32A as the manufacturer-recommended replacement for the obsolete GMC-32 series. The MC-32A is the current-production successor to the GMC-32, maintaining the same 32A AC-3 rating and 3-pole configuration. If replacing a GMC-32, order the MC-32A with the matching coil voltage suffix.
How many auxiliary contacts does the MC-32A include?
The MC-32A includes 2 NO + 2 NC auxiliary contacts built-in as standard, provided as two side-mounted blocks each containing 1 NO and 1 NC. The full catalog number format is MC-32A-22-AC120, where “22” designates 2 NO + 2 NC. Additional front-mount auxiliary contact blocks are available to expand control circuit wiring capacity.
What overload relay is compatible with the MC-32A?
The MC-32A is compatible with the LS Electric MT-32 series thermal overload relay. The MT-32 mounts directly to the T1-T2-T3 load terminals of the MC-32A for a complete motor starter assembly without additional wiring. MT-32 current ranges span 0.1A through 40A. Importantly, the same MT-32 overload family also fits the smaller MC-9B through MC-22B contactors as well as the MC-40A — making it a single overload relay inventory item for multiple contactor frame sizes. Call Kent Electrical Supply at 1-800-222-5129 for overload selection assistance.
What is the difference between the MC-32A and the MC-40A?
The MC-32A (32A AC-3) and MC-40A (40A AC-3) are adjacent frame sizes in the LS Electric Metasol MC series. The MC-40A is rated 30 HP at 460V vs. the MC-32A’s 20 HP. Both share the same MT-32 overload relay family, the same 2 NO + 2 NC auxiliary contact configuration, and the same screw clamp terminal style. The MC-40A uses a larger wire range (10–6 AWG vs. 12–8 AWG on the MC-32A). Choose between them based on your motor’s full-load amperage and HP requirements.
Does the MC-32A qualify for same-day shipping?
Yes — stocked MC-32A coil variants ship same business day from Kent Electrical Supply’s warehouse in Emmaus, PA when ordered before 4:00 PM EST. Check individual variant pages for current stock on each coil voltage. For bulk orders or MT-32 overload relays, call us at 1-800-222-5129 or text your RFQ to 484-425-0652.
