21XBXPL33 STRUTHERS-DUNN Power Relay

Review STRUTHERS-DUNN Lot Of 120vac Power Relay

The Struthers-Dunn 21xBXPL33 is a versatile and reliable 120V AC power relay designed for various industrial applications. This device is crafted with high-quality components, ensuring durability and precision in operation.

The 21xBXPL33 is a single-pole, double-throw (SPDT) power relay, meaning it can switch a single load between two sources. It is rated for a current of 20 amperes at 125 volts AC, allowing it to handle moderate to heavy loads. The relay features a gold-plated contact set, ensuring optimal conductivity and minimizing contact wear over time.

The relay is housed in a robust, epoxy-coated, die-cast aluminum housing, offering protection against harsh environmental conditions. The housing is also ventilated to dissipate heat effectively, ensuring the relay stays cool during prolonged operation.

The 21xBXPL33 comes with a built-in coil, which is rated for 250 volts AC, 0.5 amps, and 0.5 Joules. This coil is located at the bottom of the relay and is easily accessible for wiring connections. The relay also comes with a built-in overvoltage protection feature, which helps safeguard the device from damaging voltage surges.

The 21xBXPL33 is designed for easy installation, with clear and concise labeling on the relay terminals. The relay also features a handle for manual operation, allowing for testing and troubleshooting without the need for external control circuits.

In summary, the Struthers-Dunn 21xBXPL33 is a dependable and robust 120V AC power relay, suitable for various industrial applications. Its high-quality components, reliable operation, and easy installation make it an excellent choice for switching medium-sized loads in demanding environments.

A Detailed Analysis of the Struthers-Dunn 21xBXPL33 120VAC Power Relay

The Struthers-Dunn 21xBXPL33 is a 120VAC power relay that is widely used in various industrial and automation applications due to its robust design and reliable performance. In this analysis, we will discuss the key features, benefits, and potential drawbacks of this power relay to help you make an informed decision about whether it is the right choice for your specific application.

1. Robust Design: The Struthers-Dunn 21xBXPL33 is designed to withstand harsh industrial environments, making it an ideal choice for applications that require high reliability and durability. It features a sealed enclosure that protects the internal components from dust, moisture, and other environmental hazards.

2. High Current Capacity: This power relay has a high current capacity of up to 21A, making it suitable for use in applications that require the switching of heavy loads.

3. Versatile Applications: The Struthers-Dunn 21xBXPL33 can be used in a wide range of applications, including motor control, machine tool automation, and process control systems.

4. Fast Switching: This power relay has a fast switching time of less than 1 millisecond, which ensures minimal power interruption and improved system performance.

1. Price: The Struthers-Dunn 21xBXPL33 is a high-performance power relay, and as such, it comes with a higher price tag compared to some other options in the market.

2. Complex Installation: Installing this power relay may require some level of electrical expertise, as it involves working with high voltages and currents.

The Struthers-Dunn 21xBXPL33 is a high-performance, robust, and reliable power relay that is suitable for use in various industrial and automation applications where high current capacity, fast switching, and durability are essential. While it comes with a higher price tag compared to some other options, its superior features and performance make it a worthwhile investment for those who require a reliable and efficient power relay solution.

If you are looking for a reliable and high-performance power relay for your industrial or automation application, the Struthers-Dunn 21xBXPL33 is an excellent choice. However, due to its complex installation process and higher price tag, it may not be the right choice for those with limited electrical expertise or budget constraints. In such cases, you may want to consider other options that offer similar features at a lower price point or with simpler installation requirements.

Details:

No further testing was performed on the relay, since I don't have means to do so. For more details, please refer the photos included with listing. Signs of wear, including scuffs and scratches are visible on the units body. Lot of 3 Struthers-dunn 21XBXPL33 120vac power relay, pulled from a retired equipment, lot the relays were tested with multi meter, as shown in the photos.

specifications genpurrelays:

• brand: Struthers-dunn
• mpn: 21xbxpl33
• current type: Ac/dc
• type: Power Relay
• maximum amperage: 30 A
• coil voltage: 120vac
• contact material: Abs/plastic
• features: Heavy Duty
• application: Electronics

payments genpurrelays:

• credit card: discover
• other
• wallet: paypal

general genpurrelays:

• category: Business & Industrial > Electrical Equipment Supplies > General Purpose Relays

offer genpurrelays:

• in stock #: 2
• started: january 6, 2026
• availability: in stock
• sold #: 12
• prices: $59.98–$90.00
• item condition:
  • New
  • Used
• options: ship-to-home

shipping genpurrelays:

• service: usps ground advantage
• type: calculated
• class: standard
• carrier: usps
• transit: 3-8 days

returns genpurrelays:

• paid by: seller
• policy: returns accepted
• method: money back
• time: 30 days

seller genpurrelays:

• # reviews: 1600
• city: glendale, arizona
• rating: 100.0%