Best 3 Pole Contactor With Auxiliary Contacts for HVAC and Control Panels
Choosing the right 3-pole contactor with auxiliary contacts is essential for reliable HVAC control, motor switching, and automation circuits. The following selections cover AC-3 and AC-1 duty, various coil voltages, and auxiliary contact configurations to support interlocking, signaling, and self-latching controls. This guide compares common DIN-rail mounted units from Baomain and Shopcorp, highlighting coil voltage, load ratings, and auxiliary contact arrangements to help you select the best fit for your system.
| Product | Coil Voltage | Rated Load (AC-3 / AC-1) | Auxiliary Contacts |
|---|---|---|---|
| Baomain Magnetic Contactor, 3 Pole 60A Ith 110V AC Coil | 110V AC | 40A (AC-3), 60A (AC-1) @ 110V AC | 2NO + 2NC |
| Baomain 3 Pole Magnetic Contactor, 24V DC Coil | 24V DC | 9A (AC-3), 25A (AC-1) @ 24V DC | 1NO + 1NC |
| Shopcorp 3 Pole Contactor, 120V Coil | 110-120V AC | 30A (APPLY 32A inductive), 50A resistive | 1NO + 1NC |
| Baomain CJX2-1810, 24VAC Coil, 3NO+1NO | 24V AC | 18A (AC-3), 18A (AC-3) @ 380V; 3NO | 1NO |
| Baomain CJX2-1810, 220VAC Coil, 3NO+1NO | 220V AC | 18A (AC-3) @ 380V; 3NO | 1NO |
Note: Each product supports DIN rail mounting and insulation ratings suitable for industrial control panels. Always verify the coil voltage and auxiliary contact configuration to ensure compatibility with your control circuit and interlock requirements.
Baomain Magnetic Contactor, 3 Pole 60A 110V AC Coil
- 3-pole magnetic contactor rated for AC-3 at 40A and AC-1 at 60A, 110V AC
- 110V AC coil with 2NO + 2NC auxiliary contact block
- 660V insulation rating and 6kV impulse withstand voltage for spike protection
Baomain 3 Pole Magnetic Contactor, 24V DC Coil
- 9A AC-3 / 25A AC-1 ratings at 24V DC
- Coil voltage 24V DC with 1NO + 1NC auxiliary contact
- Durable insulation up to 690V with 6kV impulse withstand
Shopcorp 3 Pole Contactor, 120V Coil
- DIN rail-compatible and IEC/EN standard compliant
- 30A inductive, 50A resistive loads; 110-120V coil
- 1NO + 1NC auxiliary contacts for interlocking and signaling
Baomain CJX2-1810, 24VAC Coil, 3NO+1NO
- 3-pole, 18A AC switch rated for AC-3; 24VAC coil
- 1NO auxiliary contact to support signaling and interlocking
- DIN rail mount for easy integration into control panels
Baomain 3-Pole AC Contactor CJX2-1810, 220VAC Coil
- 3NO + 1NO auxiliary configuration for enhanced control
- 18A AC-3 rating at 380V; 220V coil compatible with standard control circuits
- DIN rail mount with robust insulation and impulse protection
Shopcorp 3 Pole Contactor, 30A, 220/240V Coil
- 30A inductive, 50A resistive loads; 220/240V coil
- 3-pole NO with 1 NO / 1 NC auxiliary contacts
- DIN rail mounting and IEC/EN standard compliance
Buying Guide
Key considerations when selecting a 3-pole contactor with auxiliary contacts include coil voltage compatibility with your control circuit, the load type (AC-3 motor loads vs AC-1 resistive loads), and the desired auxiliary contact configuration for interlocking, signaling, or latching. Choose a model whose coil voltage matches your control electronics (24V, 110V, 120V, or 220V). Confirm the maximum load rating for the intended application to avoid overheating or premature wear. Auxiliary contacts (NO/NC) enable safer interlocks and switch signaling in automation sequences. Durability features such as 690V insulation and 6kV impulse withstand help protect circuits against transients. DIN rail compatibility ensures straightforward installation in standard panels. Finally, verify whether the device supports the required certifications (UL listed, IEC/EN compliance) for your region and equipment.
For multi-voltage and multi-function needs, consider models offering 3NO+1NO or 2NO+2NC auxiliary arrays, which provide greater control options for complex circuits. If space is limited on panels, a compact 3-pole unit with DIN rail mounting can simplify wiring and maintenance. When selecting, align the device’s AC-3 and AC-1 ratings with your motor or heater loads to maintain reliable operation and extend service life.