MC-32a (3-pole 32 A)
LS Electric (Metasol) · Metasol MC 40AF frame
LS Electric Metasol MC-32a — widely used on Korean-built compressors, vacuum pumps and packaged chillers; sealed arc chamber for panel safety.
Ratings
- AC-3 (440 V)
- 32 A / 15 kW @ 400 V
- AC-1
- 50 A
- Hp (3Φ)
- 10 HP @ 230 V · 20 HP @ 460 V
- Three-phase HP
- 10 HP @ 230 V · 20 HP @ 460 V
Coil data
- Available coil voltages
- 24, 100–120, 200–240, 380–440 VAC 50/60 Hz; DC options
- Inrush VA
- ≈ 130 VA
- Sealed (holding) VA
- ≈ 11 VA
- Pickup voltage
- 0.85–1.1 × rated
- Dropout voltage
- 0.2–0.6 × rated
Typical measured coil resistance (±15%, ballpark)
24 VAC≈ 4–10 Ω
110/120 VAC≈ 100–220 Ω
220/240 VAC≈ 450–850 Ω
440 VAC≈ 1,700–3,200 Ω
OL = open coil · near zero = shorted turns · coil-to-frame must read >1 MΩ.
Coil resistance checker
Pick the coil voltage, enter your meter reading across A1–A2 (coil disconnected), and compare it to the expected ballpark.
Ω
This model (24 VAC table value)4 Ω–10 Ω
Generic mid-frame 24 VAC4 Ω–9 Ω
OL = open coil. 0–2 Ω = shorted turns (often from a cooked transformer). Ballpark only (±15%+); electronic wide-range coils (e.g. ABB AF) read misleading values — test those at rated voltage instead. Always measure coil-to-frame too: must be >1 MΩ.
Terminals & accessories
Power/coil terminals: Screw to 25 mm²; finger-safe shrouded terminals
Auxiliary contacts: 1NO+1NC built in on 'a' variants; AU/ AX side and front blocks
Companion overload: MT-32 thermal or GTK/EMPR electronic overload relay
Cross-references
- Schneider LC1D32
- WEG CWB32
- Siemens 3RT2027
- Fuji SC-E3
- Mitsubishi S-T32
Field notes
- Metasol frames are labeled by AF size (18AF, 22AF, 40AF…) — match the AF frame when ordering accessories, not the amp rating.
- EMPR electronic overloads are programmable; a factory default of class 10 will nuisance-trip a hard-starting recip.
- Sealed arc chamber means you cannot inspect the tips — judge by contact-drop measurement (mV across each closed pole) instead.
Manufacturer documentation