Johnson Controls KZ-4000-8 DPDT Relay

The Johnson Controls KZ-4000-8 DPDT Relay is a heavy-duty general-purpose component engineered for controlling high-wattage electrical loads from lower-powered pilot sources. Featuring a 120V AC coil and a Double Pole Double Throw (DPDT) contact arrangement, this relay provides a versatile switching solution for complex HVACR sequences, including simultaneous interlocking of fans, compressors, and auxiliary heating elements. Built with self-wiping silver alloy contacts, it is rated for 25 Amperes resistive loads or 1 HP at 120/240V, ensuring reliable performance in demanding industrial environments.

Designed for panel mounting, the KZ-4000-8 simplifies field installations with accessible screw terminals located on the relay body. Its 10 VA nominal coil rating makes it compatible with standard 120V control circuits found in commercial air handling units and refrigeration systems. For applications requiring environmental protection, this unit is designed to fit the BZ-1000-11 enclosure. This Johnson Controls relay is an industry-standard replacement for managing 120V switching logic in automation and motor control circuits.

• High Current Capacity: Rated for up to 25A resistive loads, making it ideal for motor starting and heavy lighting circuits.
• DPDT Contact Configuration: Allows for simultaneous control of two separate circuits or polarity reversal applications.
• Silver Alloy Contacts: Self-wiping action maintains low contact resistance and prevents carbon buildup over time.
• Flexible Mounting: Internal screw terminals and a robust base design allow for direct panel mounting without specialized sockets.
• Pilot Duty Reliability: 690 VA pilot duty rating ensures compatibility with heavy-duty contactors and solenoids.

What is the maximum horsepower rating for this relay?
The KZ-4000-8 is rated for up to 1 HP (746 watts) at 120V or 240V AC, suitable for small blower motors and pumps.

Does this unit require a separate mounting base?
No, this specific model features integrated screw terminals and is designed for direct panel mounting, although it can be housed in a BZ-1000-11 enclosure if protection is required.

Can I use this relay for 24V control circuits?
No, the KZ-4000-8 is specifically wound for a 120V AC coil. For 24V applications, you would typically require the KZ-4000-7 model.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.