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Heavy-Duty Lightning Arrestor – Surge Protection for Pumps, Control Panels & Well Systems
SKU LAHDT550
Starting at $57.60
MERRILL SURGE PROTECTORS
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Compare Merrill surge protectors using the details that matter most for your application.
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| Product | ||||
|---|---|---|---|---|
| Why Choose It? | Lowest-cost choice for standard single-phase surge protection. | Choose when you want economy protection plus terminal-lug convenience. | Choose when you need more secure panel attachment and a more robust setup. | Best when you want heavy-duty construction plus terminal-lug convenience. |
| Best For? | Basic well pump controls and economical water system protection. | Installations where terminal-lug connection is preferred. | Demanding installs and panel-mounted applications. | Higher-demand installations needing secure mounting and terminal-lug connection. |
| What You Get? | Economy arrestor for 120/240-volt single-phase systems. | Economy arrestor with terminal lug for 120/240-volt single-phase systems. | Heavy-duty arrestor for 120/240-volt single-phase systems. | Heavy-duty arrestor with terminal lug for 120/240-volt single-phase systems. |
| Voltage | Available for systems below 300V or below 600V. | Available for systems below 300V or below 600V. | Available for systems below 300V or below 600V. | Available for systems below 300V or below 600V. |
| Install Location | Pressure switch, control box, or both. | Pressure switch, control box, or both. | Pressure switch, control box, or both. | Pressure switch, control box, or both. |
| Mounting / Connection | Standard economy design without terminal lug. | Terminal lug included for easier connection. | Threads and nut for secure attachment to an electrical panel. | Threads and nut for panel attachment plus terminal lug included. |
If only one arrestor is used, the pressure switch location offers economical water system protection.
For surges above 300 or 600 volts, high voltage is directed to the ground wire.



