When it comes to HVAC systems, the compressor is the most critical—and expensive—component to replace. Whether you're dealing with residential air conditioning or light commercial refrigeration systems, sudden power surges and voltage drops can quickly cause serious damage. The Intermatic CD1-024R Compressor Defender provides a first line of defense against electrical threats that can shorten equipment life or lead to costly repairs.
This compact surge protective device (SPD) is engineered specifically for single-phase HVAC systems and built to meet the demands of real-world electrical environments.
⚡ Surge Protection That Works When It Matters
The CD1-024R is a Type 3 SPD, designed to be installed at the equipment level for direct surge suppression. With a surge capacity of 10kA per mode (20kA total) and a response time of less than 1 nanosecond, it reacts instantly to overvoltage spikes and transients—helping to prevent breakdowns before they occur.
The wide 120–240 VAC voltage range makes it compatible with most common HVAC setups, including:
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Central Air Conditioning Units
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Heat Pumps
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Mini-Split Systems
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Commercial Coolers or Freezers
🛠️ Built for Installers and Field Techs
Time is money, especially during the peak HVAC season. That’s why the CD1-024R is designed with convenience in mind:
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Installs in under 10 minutes
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Simple 2-wire plus ground hookup
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Compact 3.33" x 2.60" x 1.38" form factor fits tight enclosures
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Direct mounting to disconnect boxes or equipment panels
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LED indicators provide immediate power and protection status
No special tools are required, and the entire install can be completed during routine maintenance or system replacement.
🧰 Durable Construction for Demanding Environments
Built with a UV-stable thermoplastic enclosure and certified to NEMA Type 3R, the CD1-024R handles harsh weather, moisture, and temperature extremes without issue. It’s equally suited for:
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Outdoor condenser units
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Attic-mounted air handlers
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Wall-mounted mini-split units
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Garage or rooftop refrigeration systems
The UL 1449 4th Edition listing ensures it meets stringent surge protection and fire safety requirements, giving both homeowners and pros confidence in its performance.
✅ Technical Specifications at a Glance
| Feature | Specification |
|---|---|
| Voltage Range | 120–240 VAC |
| Surge Capacity | 10kA per mode / 20kA total |
| Response Time | < 1 nanosecond |
| MCOV | 150V (L-N), 300V (L-L) |
| Enclosure Rating | NEMA 3R |
| Operating Temp Range | -40°F to 140°F (-40°C to 60°C) |
| Mounting Style | Direct Mount (Screw Terminals) |
| Size | 3.33" H × 2.60" W × 1.38" D |
| Weight | 0.5 lb |
| Part Number | CD1-024R |
🛡️ Why You Need the Compressor Defender
Power surges can be caused by nearby lightning, utility grid switching, or even equipment cycling within your own building. These spikes don’t just trip breakers—they can fry circuit boards, degrade insulation, and knock out compressors entirely.
The Compressor Defender CD1-024R gives you:
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A shield against damaging transients and brownouts
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An extra layer of protection for control boards and fan motors
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Fewer emergency service calls and warranty claims
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Peace of mind that your HVAC investment is guarded 24/7
Final Word
Whether you're a contractor looking to protect your installs or a facilities manager tasked with reducing downtime, the Intermatic CD1-024R offers reliable surge protection where it counts. With fast installation, a durable design, and proven performance, it’s a smart, low-cost insurance policy for your HVAC systems.