HUBBELL HBL3W50 SPD BLOCK 50KA 120/240V Surge Protective Device

The HUBBELL HBL3W50 is a Type 1 Surge Protective Device (SPD) designed for single-phase 120/240V AC electrical systems. It provides surge and overvoltage protection with a peak amperage capacity of 50kA. Suitable for installation at service entrance panels, load centers, or electronic compartments, this device is ideal for electrical distributors and switchgear suppliers seeking reliable protection solutions. Its compact design and NEMA 4X rating make it appropriate for both indoor and outdoor environments, supporting applications requiring durable and high-performance surge protection.

Specifications

• Application: Surface Mount Brick with Leads
• Class: Type 1 SPD
• Material: Steel
• Mounting: Mounting Screws
• Connection: Leads
• Environmental Conditions: Indoor and Outdoor
• Frequency Rating, Maximum: 60 Hz
• Product Weight: 1.8 lbs
• Manufacturer: Hubbell Building & Automation
• Manufacturer Part #: HBL3W50
• Service Voltage: 120/240V AC Single Phase, 1Ph. 3-wire + G
• Peak Amp Capacity: 50kA
• Maximum Continuous Operating Voltage (MCOV): 150 VAC
• Voltage Protection Rating (VPR): 700V L-N, 800V L-G, 1200V L-L
• Operating Temperature Range: -40ºF to 149ºF (-40ºC to 65ºC)
• Dimensions: 3.0"W x 3.6"H x 2.67"D
• Terminal Accommodation: #12 AWG Wire Leads
• Enclosure Rating: Type 4X
• Diagnostics: Green Status LED per line
• Listing: UL1449 4th edition
• Warranty: 10 years

Features

• Compact design suitable for OEM applications where size is critical
• Low-cost surge arrestor installable on line side or load side of service entrance
• NEMA 4X enclosure rating for robust indoor and outdoor protection
• Green status LED indicators for real-time diagnostic monitoring
• Thermal fusing for enhanced safety and equipment protection
• Parallel connection method with #12 AWG solid wire leads for easy installation
• Designed for use on solidly grounded electrical systems only

Downloads & Links

• Spec Sheet
• Spec Sheet