CD0-21 SQUARE D Power Relay

Review SQUARE D Squarecd0-21 Heavy Duty Power Relay

The Square CD0-21 8501 Power Relay is a versatile and reliable electrical component designed for various automotive and industrial applications. This power relay boasts a square design with dimensions of approximately 45mm x 45mm x 32mm (LxWxH), making it compact yet capable of handling significant electrical loads.

The CD0-21 8501 Power Relay is a 12V DC coil-operated relay, which means it requires a 12-volt power source to activate. It can switch a maximum current of 21 Amperes at a voltage of 250 Volts AC or 30 Volts DC. This makes it well-suited for applications where heavy electrical loads need to be controlled, such as ignition systems, lighting systems, or HVAC systems.

This power relay features a gold-plated contact set, ensuring excellent conductivity and a long lifespan. It also comes with a protective silicone boot, which shields the relay from dust, moisture, and other environmental hazards. The boot can be easily removed for direct access to the relay terminals when installation or maintenance is required.

The CD0-21 8501 Power Relay has a contact rating of 250V AC, 30V DC, and a contact resistance of less than 50 milliohms. This indicates that the relay can handle a wide range of voltages and currents and can maintain a low electrical resistance for efficient power transfer.

The power relay comes with four terminals: two for the input circuit (IN and IN-), one for the normally open (NO) contact, and one for the normally closed (NC) contact. The NO contact is open when the relay is de-energized and closes when the relay is activated. The NC contact is closed when the relay is de-energized and opens when the relay is activated.

The Square CD0-21 8501 Power Relay is built to withstand harsh environments and can operate in temperatures ranging from -40 C to 85 C. Its robust construction and reliable performance make it an excellent choice for various automotive and industrial applications where heavy electrical loads need to be controlled.

The Square CD0-21 8501 Power Relay is a popular choice for businesses and individuals looking for a heavy-duty, reliable, and versatile power relay solution. Here are some pros and cons that may help you make an informed decision about purchasing this product:

1. Heavy-duty design: The Square CD0-21 8501 Power Relay is built to handle high currents and voltage levels, making it ideal for industrial and commercial applications.

2. Versatile: This power relay can be used in a variety of applications, including HVAC systems, vending machines, and security systems.

3. Easy installation: The relay comes with clear markings and a user-friendly design, making it easy to install and configure.

4. Durable: The Square CD0-21 8501 Power Relay is built to last, with a robust design that can withstand harsh environments and heavy usage.

5. Cost-effective: Compared to other power relay solutions, the Square CD0-21 8501 Power Relay is relatively affordable, making it a cost-effective option for businesses and individuals.

1. Limited customization: The Square CD0-21 8501 Power Relay does not offer extensive customization options, which may be a drawback for some users.

2. Manual configuration: While the relay is easy to install, it requires manual configuration, which can be time-consuming for users who prefer automated solutions.

3. No remote monitoring: The Square CD0-21 8501 Power Relay does not offer remote monitoring capabilities, which may be a concern for businesses that require constant monitoring of their power systems.

In conclusion, the Square CD0-21 8501 Power Relay is a reliable and cost-effective solution for businesses and individuals looking for a heavy-duty power relay. Its versatility and ease of installation make it a popular choice, but its limited customization options and lack of remote monitoring capabilities may be a drawback for some users. Ultimately, the decision to purchase this product depends on your specific needs and preferences. If you require a heavy-duty power relay for industrial or commercial applications and are looking for a cost-effective solution, the Square CD0-21 8501 Power Relay is a great option to consider.

Details:

Applications: ideal for motor control, lighting, automation, and signal switching. Engineered for long life and high-performance switching, this DPT double-pole, double-throw relay is ideal industrial control panels, hvac systems, machinery, automation applications where reliability key. Coil voltage : 120v ac standard control voltage for most industrial systems. Certifications: ul listed, CSS certified meets safety and performance standards.

Get dependable control in demanding environments with the Square8501-cd0-21 heavy duty power relay by Schneider electric. Durability: designed for long electrical and mechanical life. Key: : brand: Squarely Schneider electric trusted in industrial electrical control. Heavy duty design: suitable for high-cycle industrial use.

Contact configuration: DPT double pole, double throw 2 form c contacts. Mounting type: plug-in with octal base easy to install and replace. Model number: 8501-cd0-21 heavy-duty plug-in power relay.

specifications genpurrelays:

• brand: Square D
• mpn: Cd0-21
• type: Power Relay
• features: Heavy Duty

seller genpurrelays:

• # reviews: 494
• rating: 98.6%
• city: dallas, texas

general genpurrelays:

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

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• price: $29.99
• item condition: New – Open box
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• in stock #: 1
• started: september 21, 2025