EX7204-2121S VTI INSTRUMENTS Spdt Relay Module

Review VTI INSTRUMENTS Spdt Relay Module

The VTi EX7204-2121S is a single-pole double-throw (SPDT) relay module designed for various automation and control applications. This compact and versatile relay module measures 48mm x 22mm x 13mm (L x W x H) and is suitable for both industrial and domestic use.

The EX7204-2121S comes with four normally open (NO) contacts and two normally closed (NC) contacts. Each contact can handle a maximum current of 10A at 250VAC or 30VDC, ensuring reliable operation for a wide range of loads. The module is equipped with gold-plated contact terminals, which not only enhance the contact conductivity but also provide excellent resistance to corrosion.

This SPDT relay module features a coil voltage range of 12VDC to 35VDC, making it compatible with various power supplies. The coil resistance is 50 ohms, ensuring fast switching times and low power consumption. The module also includes a built-in diode across each contact to prevent inductive kickback and protect the contacts from damage.

The EX7204-2121S comes with a clear and intuitive front panel, allowing users to easily identify the status of the contacts. The module also includes an LED indicator, which illuminates when the coil is energized, providing a visual confirmation of the relay's operation.

The VTi EX7204-2121S is designed to operate in a wide temperature range of -10 C to 60 C, making it suitable for use in various environments. The module is also RoHS compliant and conforms to CE and UL standards, ensuring compliance with international safety regulations.

In conclusion, the VTi EX7204-2121S is a high-performance and versatile SPDT relay module, suitable for various automation and control applications. Its compact size, reliable operation, and wide compatibility with various power supplies and loads make it an excellent choice for both industrial and domestic use.

The VTI EX7204-2121S SPDT Relay Module is a 4-channel, single-pole double-throw (SPDT) relay with a form factor of 1 inch by 2 inches. This component is commonly used in various electronic projects and applications that require switching multiple circuits. Here are some pros and cons of buying this relay module:

1. Compact Size: The VTI EX7204-2121S is relatively small, making it suitable for projects with limited space.

2. Versatile: This relay can be used in various applications, including automation, industrial control systems, and home automation projects.

3. Easy to Use: The SPDT configuration allows for multiple circuits to be switched with a single input signal.

4. High Current Capacity: Each channel can handle up to 1A of current, which is sufficient for many electronic projects.

5. Reliable: SPDT relays are known for their reliability and durability, making this module a good investment for long-term use.

1. Limited Voltage Range: The relay is rated for a maximum voltage of 30V DC and 115V AC, which may not be suitable for all applications.

2. Manual Operation: Unlike solid-state switches, relays require a physical trigger to switch, which may not be desirable in some applications.

3. Additional Cost: Compared to other types of switches, relays can be more expensive, especially when used in larger quantities.

In conclusion, the VTI EX7204-2121S SPDT Relay Module is a versatile and reliable component for various electronic projects that require switching multiple circuits. However, its limited voltage range and manual operation may be a drawback for some applications. If the voltage range and manual operation are not a concern, then this relay module is a good investment for its compact size, high current capacity, and versatility.

Recommendation: If you're looking for a compact, reliable, and versatile SPDT relay module for your electronic project, the VTI EX7204-2121S is a good option. However, if you require a higher voltage range or prefer a solid-state switch, you may want to consider other options. It's always important to carefully consider the specific requirements of your project before making a purchase.

Details:

Hours / location. Are not included with this equipment unless pictured and/or listed in the above. Module size: single slot. Relay: 2 spdt fail safe.

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specifications genpurrelays:

• brand: Vti Instruments
• mpn: Ex7204-2121s
• part type: Instrument Module
• item width: 14
• country of origin: United States

offer genpurrelays:

• in stock #: 1
• options: ship-to-home
• availability: in stock
• price: $465.00
• item condition: Used
• sold #: 12
• started: may 19, 2026

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