Mars 685744 91321 Definite Purpose Contactor 2 Pole 30 Amp 24 Volt

Mars 685744 91321 Definite Purpose Contactor 2 Pole 30 Amp 24 Volt

A brand-new, unused, undamaged item in its original packaging.

Item: 91321

Overview:
MARS Definite Purpose Contactors
Designed for use on refrigeration, air conditioning and electric heating systems
High performance as well as Reliability
Universal mounting base allows replacement of most contactor brands
Lugs and quick connects

Technical Specifications:
Contactor Type: Definite Purpose
FLA Inductive Amps: 30
FLA Resistive Amps: 40
Number of Poles: 2
Width Inches: 2.05
Coil Voltage: 24
Coil Hz: 50/60
Lug or Screw Terminal: Screw
Height Inches: 2.32
Depth Inches: 3.19
Standards: UL
Number of QC Terminals Per Pole: 4

The Mars 685744 91321 Definite Purpose Contactor is a robust electrical component designed for specific applications where reliability and efficiency are crucial. This 2-pole, 30-amp contactor with a 24-volt coil is commonly used in HVAC systems, refrigeration units, and other similar machinery that requires precise control of high power circuits.

Product Specifications:

• Manufacturer: Mars
• Model Number: 685744 91321
• Type: Definite Purpose Contactor
• Poles: 2 Pole
• Amperage: 30 Amp
• Coil Voltage: 24 Volt
• Build: Compact, robust design for easy installation and longevity in various environmental conditions
• Certifications: Often includes UL certification or equivalent, ensuring compliance with electrical safety standards.

Uses:

• HVAC Systems: Commonly used to control electric furnaces, air conditioners, and large ventilation fans.
• Refrigeration Units: Helps in managing compressor and condenser fan operations.
• Industrial Applications: Suitable for controlling electric motors and lighting loads in specific industrial setups.

Pros:

• High Reliability: Designed to perform consistently under the demanding conditions of a specific purpose application.
• Energy Efficient: Helps in controlling high power equipment efficiently, potentially lowering energy costs.
• Durability: Built to withstand frequent switching operations and environmental variables like temperature and humidity.

Cons:

• Specialized Use: As a definite purpose contactor, it may not be suitable for general use or in applications outside of its specifications.
• Installation Requirements: Installation should be handled by professionals to ensure safety and functionality.

Installation:

• Professional Installation Recommended: To ensure the contactor is installed safely and functions as intended, professional installation by a qualified electrician is recommended.
• Wiring Specifications: Proper connection to the 24-volt coil and the main power circuit is crucial. Incorrect wiring can lead to malfunction or serious safety hazards.
• Mounting: Typically mounted within accessible areas of the machinery for easy maintenance and inspection.

Comparison with Similar Products:

When comparing the Mars 685744 91321 to other contactors like those from Honeywell or Siemens, consider:

• Load Capacity: Ensure the contactor can handle the required load within your specific application.
• Coil Voltage Compatibility: Match the coil voltage with your system’s operational voltage to avoid issues.
• Price and Durability: Evaluate whether the price aligns with the expected lifespan and durability under operational conditions.

Related Items:

• Overload relays for additional circuit protection
• Electrical enclosures to house the contactor and related wiring
• Auxiliary contacts, if additional switching capabilities are needed

Disclaimer:

Mars is a registered trademark, and the mention of Mars and any part numbers is for descriptive purposes only, with no affiliation or endorsement implied.

The Mars 685744 91321 is an excellent choice for specific applications requiring a reliable and efficient method to control high power circuits.