
R02-739-100-004 Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $53.21 | Condition is New – Open box, ALLENAIR R02/739-100-004 / R02739100004 (NEW NO BOX), shipping cost = $12.90 | 99.7% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $50.00 | Condition is New, ALLENAIR R02/739-100-004 (SP89), FREE SHIPPING | 99.5% |

The Allen-Bradley R02/739-100-004 Reed Switch, SPST, 0-240V, 30VA, 9ft Cable is a versatile and reliable electronic switching component designed for various automation applications.
This reed switch is a single-pole, single-throw (SPST) device, which implies it has only two terminals and can switch a circuit on or off. The switch operates based on a magnetic field, making it an excellent choice for applications requiring contactless sensing in proximity to a moving part. Unlike mechanical switches, reed switches have no moving parts that could wear out, making them exceptionally durable and long-lasting.
The Allen-Bradley R02/739-100-004 comes with a factory-installed 9ft (2.74m) cable, allowing for easy integration with various control systems. This pre-wired design simplifies installation and saves time in numerous applications. The cable is suited to handle a maximum current of 2.5A, ensuring proper power supply to other components.
This reed switch is compatible with various voltage ranges, including 0-240 volts, making it adaptable for use in a range of industrial and commercial settings. Additionally, it has a maximum power rating of 30VA, which enables it to switch small loads such as actuators, solenoids, and indicators in control circuits.
This Allen-Bradley product is built with quality and reliability in mind. It has a durable construction that ensures excellent performance under harsh conditions. With a compact design and easy installation, the R02/739-100-004 Reed Switch, SPST, 0-240V, 30VA, 9ft Cable is the perfect solution for various automation projects. Whether it's for sensing the position of a moving part, detecting the presence or absence of a magnet, or controlling small loads, this reed switch is an excellent addition to any system.
Reed Switch (Allen-Bradley R02/739-100-004) Buyer's Guide: Pros, Cons, and Final Recommendation
The Allen-Bradley R02/739-100-004 Reed Switch is a popular choice for various automation applications due to its widely used design and versatile features. As a buyer, it's essential to weigh the advantages and disadvantages of using this specific product to make an informed decision.
Pros:1. Reliability: Reed switches, such as the Allen-Bradley R02/739-100-004, are known for their durability and reliability due to their solid-state construction. They do not wear out mechanically, ensuring consistent performance over long periods.
2. Versatility: This reed switch comes with a 9ft cable, offering a longer length than some other models, making it suitable for applications that require a longer distance between the actuator and the switch. It also handles a wide range of voltages (0-240V) and currents (30VA), making it versatile for various applications in industries such as automotive, HVAC, and industrial automation.
3. Fast response time: Reed switches provide quick response times because of their magnetic design, allowing them to switch almost instantly when an external magnetic field is applied or removed.
Cons:1. Limited extended usage in high temperatures: Although the Allen-Bradley R02/739-100-004 reed switch can typically handle moderate temperatures, prolonged exposure to extremely high temperatures may negatively impact its performance and reliability.
2. Fragile contacts: Despite their reliability, reed switch contacts can wear down over time when subjected to high-voltage arcs or frequent switching. It's crucial to use appropriate protection systems in the application to minimize this risk.
3. Limited overload capacity: The Allen-Bradley R02/739-100-004 reed switch has a relatively low overload capacity. Careful consideration should be given to the maximum permissible current rating for the application to avoid exposing the switch to potential damage.
Conclusion:The Allen-Bradley R02/739-100-004 Reed Switch is a reliable and versatile component, suitable for various industries and applications, providing a fast response time and durability. However, buyers must consider potential drawbacks, such as temperature limitations, fragile contacts, and limited overload capacity, to ensure the switch can handle their specific requirements. Proper application engineering and system design are essential for maximizing the switch's longevity and ensuring efficient performance.
Recommendation:I recommend considering the Allen-Bradley R02/739-100-004 reed switch for applications that require a solid-state switched with a 9ft cable and are compatible with the switch's voltage and current specifications. To extend the switch's life span, consider implementing protective systems such as power limiting circuits, flyback diodes, and surge protection devices to minimize voltage arcs and protect against high-voltage surges. Careful application design and engineering will ensure optimal use of this reliable and versatile component.
Details:
It has a voltage rating of 0-240v and can handle power load up to 30va. The Allenair r02/739-100-004 reed switch is a normally open no single-pole, single-throw spst switch designed for electrical applications. This reed switch is a reliable component for various industrial and commercial applications requiring precise efficient electrical control. The switch is equipped with a 9-foot long cable for easy installation and connection to electrical systems.
specifications indusswitch:
- brand: Allenair
- mpn: R02/739-100-004
- type: Reed Switch
payments indusswitch:
- credit card: visa
- wallet: google-pay
- other
general indusswitch:
- category: Business & Industrial > Electrical Equipment Supplies > Magnetic Reed Switches
shipping indusswitch:
- carrier: usps, ups
- class: standard, one-day, expedited
- type: calculated
- transit: 2-7 days
- service: usps ground advantage, ups next day air, ups 2nd day air
returns indusswitch:
- policy: returns accepted
- time: 30 days
- method: money back
- paid by: seller
offer indusswitch:
- prices: $50.00–$53.21
- item condition:
- New – Open box
- New
- options: ship-to-home
- sold #: 30
- availability: in stock
- started: january 15, 2025
- best offers: true
- in stock #: 2
seller indusswitch:
- city: portland, oregon
- # reviews: 7031
- rating: 100.0%
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