Leviton
Whole House Surge Protective Device
Best panel-mount solution for homeowners protecting sensitive electronics from power surges.
The Leviton Single Phase Panel Mount Surge Protective Device (Model 51120-1) provides robust 4-Mode Protection for 120/240V single-phase electrical systems. It utilizes high-energy solid-state semiconductor circuitry on each phase, ensuring sensitive electronics like TVs and computers are safeguarded via a low Voltage Protection Rating (VPR). This unit features independent thermal fuse protection per phase and includes a real-time visual indicator to confirm power and suppression status. Designed for panel mounting, it is fully compatible with Leviton Decora Home Controls for integrated system management.
$237.50
Owner Satisfaction
4.7
/ 5
Category Rank
5
/ 189
#5 in Surge Protection Devices
Price vs Category Average
+12%
Above average
Standards
144932
/ UL rd Edition, Type
Who it's for
- Budget-conscious owners wanting financial security for expensive electronics
- Homeowners seeking comprehensive protection for all major appliances
- Residents living in areas prone to severe lightning strikes
Who should skip it
- DIY enthusiasts looking to avoid professional electrical service fees
- Users needing protection from internal appliance-generated power spikes
- Consumers wanting a permanent, maintenance-free surge solution
Performance breakdown
Surge Suppression Depth
Four-mode protection provides a comprehensive shield for your entire home electrical system.
Electronics Safety
Low voltage protection ratings ensure sensitive devices remain safe during power spikes.
Status Monitoring
Real-time visual indicators offer immediate peace of mind regarding system health.
Installation Versatility
Panel-mount design integrates cleanly into standard electrical setups for professional results.
System Reliability
Independent thermal fuses per phase prevent cascading failures during major surges.
Smart Integration
Seamless compatibility with Decora controls bridges the gap between power and automation.
Key Specs
Standards
UL1449 3rd Edition, Type 2
Voltage
120/240V Single Phase
Enclosure Type
NEMA 1
Frequency
50/60Hz
Recommended Circuit Breaker Rating
20A, 120/240V
Mounting
Panel Mount
Maximum Continuous Operating Voltage (Uc)
240V
Technology
Solid-state semiconductor surge suppression circuitry
Features
- Offers comprehensive 4-Mode Protection
- Real-time visual indicator for status checks
- Low VPR protects sensitive electronics
- Independent thermal fuse protection per phase
- Compatible with Leviton Decora Home Controls
- High-energy surge suppression circuitry
- Designed for panel mounting installation
What customers say
Customers overwhelmingly view this surge protective device as an essential investment, prioritizing home safety and peace of mind. The core theme is reliable protection, with many users citing successful events where the device saved expensive electronics and major appliances from power surges. Build quality is consistently described as robust and durable, meeting high standards. While professional installation is often needed for the main service panel, qualified individuals find the process straightforward. The clear status indicators are highly valued for immediate operational confirmation. Despite minor notes on instructions for DIYers, the consensus is that this device offers exceptional value, making it a cornerstone for modern electrical safety.
Know before you buy
4-Mode Protection refers to the device's ability to guard against surges between all critical points in your electrical system: line-to-neutral, line-to-ground, neutral-to-ground, and line-to-line. This comprehensive approach ensures that sensitive electronics are shielded from voltage spikes regardless of where they originate.
This device is designed for panel mounting and requires direct connection to your electrical panel. Because it involves working with high-voltage wiring, it should be installed by a licensed electrician to ensure safety and compliance with local building codes.
The unit features a real-time visual indicator light on the front. If the light is illuminated, the device is active and providing protection; if the light is off, it indicates that the internal thermal fuses have tripped and the unit needs to be replaced.
Yes, this model is fully compatible with Leviton Decora Home Controls. It is designed to integrate seamlessly into your existing system management, allowing for a cohesive approach to home automation and electrical protection.
While this whole-house surge protector provides a critical first line of defense for your home's major appliances and wiring, it is still recommended to use point-of-use surge protectors for highly sensitive electronics like computers and high-end home theater equipment to provide an extra layer of localized filtration.
The Leviton 51120-1 requires a dedicated 20A, 120/240V circuit breaker for proper installation and operation.
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