SIEMENS 40LP32A Industrial Auxiliary Contactor

Description

SIEMENS 40LP32A Industrial Auxiliary Contactor

Product Dimensions：

The Siemens 40LP32A is a heavy-duty, industrial-grade NEMA Size 5 Non-Reversing Contactor. Belonging to the Class 40 series, it is engineered for full-voltage switching and reliable control of heavy three-phase AC electric motors in harsh industrial conditions.

Product Detailed Description

The 40LP32A is a 3-pole electromagnetic contactor designed to start and stop electric motors operating up to 200 HP at 460V/575V. Built according to rugged NEMA standards, it features high-grade silver-cadmium oxide contacts and arc-chutes designed to withstand repeated high-current switching and severe electrical stress.

Technical Parameters

Product Advantages

• Heavy-Duty Durability: NEMA-rated contactors are intentionally oversized compared to IEC contactors, providing much greater mechanical lifespan and higher tolerance for severe duty cycles.
• Replaceable Components: Designed for long-term serviceability; main contacts, arc chutes, and magnet coils can be easily serviced or replaced without removing the entire unit from the panel.
• High Thermal Capacity: The 270 A continuous rating allows it to handle sudden current surges and frequent start/stop operations without overheating.
• Modular Upgrades: Accepts a wide range of side-mounted auxiliary contact blocks and overload relay units to form a complete motor starter assembly.

Important Considerations (Precautions)

• Coil Voltage Verification: The base part number 40LP32A is usually followed by a letter suffix (e.g., 40LP32AF, 40LP32AH) denoting the coil operating voltage. Always verify the coil designation before applying power to avoid burning out the coil or failing to pull in.
• Overload Protection: This unit is a standalone contactor, not a complete starter. It does not include integrated thermal or electronic overload protection. An overload relay must be paired with it to protect the motor from phase loss or overcurrent.
• Arc Flash & Enclosure Safety: As an open-type unit, it must be installed inside a suitable NEMA-rated protective enclosure (e.g., NEMA 1, 4, or 12) to prevent accidental contact and contain arc discharge.
• Busbar/Lug Tightening: Due to high current loads (270 A), check and torque power terminal lugs strictly to manufacturer specifications during commissioning to prevent thermal breakdown.

Product Applications

The Siemens 40LP32A is designed for high-power, industrial motor loads:

• Heavy Manufacturing: Large air compressors, industrial chillers, and hydraulic pump stations.
• Mining & Materials: High-capacity conveyors, jaw crushers, and ball mills.
• Water & Wastewater: Large municipal water supply pumps and aeration blowers.
• HVAC Systems: Central facility primary chilled water pumps and large ventilation fans.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

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