50 AMP 120/240V Marine Shore Power Surge Protector MSP50A-1
Price range: $799.00 through $949.00
Heavy-duty 50A marine shore power surge protection with a 50,000 amp (50kA) surge current rating.
The Bad Wolf MSP50A-1 installs inline between a 50A 120/240V shore power pedestal and your boat or marine shore power cord. It features SS2-50P/SS2-50R locking marine connections, a rugged NEMA 4X enclosure, and a built-in digital display that shows incoming line-to-line shore power voltage.
- 50A 120/240V marine shore power
- 50kA surge current rating
- Digital line-to-line voltage display
- SS2-50P / SS2-50R locking connections
- NEMA 4X enclosure
- Available in multiple overall lengths
Made to Order: This product is built after your order is placed. Please allow 3–5 business days for production before shipment.
50 AMP 120/240V Marine Shore Power Surge Protection
The Bad Wolf MSP50A-1 is a heavy-duty inline surge protector designed specifically for 50 amp 120/240V marine shore power systems. It installs inline between the marina shore power pedestal and your boat, or between the pedestal and a 50 amp marine shore power extension cord, providing dedicated surge protection before incoming shore power reaches your vessel.
The MSP50A-1 provides a 50,000 amp (50kA) surge current rating and is designed for continuous operation at up to 50 amps on 120/240V split-phase marine shore power systems.
Digital Shore Power Voltage Display
A built-in digital voltmeter continuously displays the incoming line-to-line voltage, allowing you to quickly view the shore power voltage while connected.
Marine Locking Shore Power Connections
The MSP50A-1 uses SS2-50P and SS2-50R marine shore power connectors with threaded locking collars. When properly mated and secured, the locking connections provide a secure, weather-resistant connection suitable for marine shore power applications.
Heavy-Duty Marine Construction
The surge protection components are housed inside a rugged NEMA 4X enclosure. The enclosure measures approximately 7.5 inches long × 4.75 inches wide × 3 inches high.
The standard MSP50A-1 is approximately 26 inches overall length, measured from the extreme end of the male connector to the extreme end of the female connector. The fully assembled standard version weighs approximately 6.4 pounds.
Available in Multiple Overall Lengths
The MSP50A-1 is available in several finished lengths to accommodate different shore power installations:
- MSP50A-1 – Standard approximately 26-inch overall length
- MSP50A-1-6 – 6 ft overall length
- MSP50A-1-10 – 10 ft overall length
- MSP50A-1-15 – 15 ft overall length
Overall length is measured from the extreme end of the male shore power connector to the extreme end of the female shore power connector. Additional custom lengths may also be available.
Key Features
- Designed for 50 amp 120/240V marine shore power systems
- 50,000 amp (50kA) surge current rating
- 50 amp maximum continuous current
- 150/300V MCOV
- 500/1000V VPR
- Digital line-to-line shore power voltage display
- SS2-50P male marine shore power connector
- SS2-50R female marine shore power connector
- Threaded locking shore power collars
- NEMA 4X surge protector enclosure
- Multiple overall cable lengths available
- Made in USA
- Veteran Owned Small Business
Made to Order
Each MSP50A-1 is built after your order is placed. Please allow 3–5 business days for production before shipment. Transit time begins after the completed product is handed to the shipping carrier.
Product Details
| Weight | N/A |
|---|---|
| Dimensions | 26 × 7.5 × 4.75 in |
| Overall Length | Standard 26", 6 ft, 10 ft, 15 ft |
Installation
MSP50A-1 Installation & Use
The Bad Wolf MSP50A-1 is designed for inline use with a standard 50A 120/240V marine shore power connection. No permanent hardwiring is required for normal operation.
Connection Order
- Turn OFF the shore power pedestal breaker before making or removing any connections.
- Connect the SS2-50P male connector of the MSP50A-1 to the 50A shore power pedestal connection.
- Fully engage and tighten the threaded locking collar to secure the connection.
- Connect the SS2-50R female connector of the MSP50A-1 to either:
- the boat's 50A shore power inlet, or
- a compatible 50A marine shore power extension cord.
- Fully engage and tighten the locking collar on the female connection.
- Verify that all connectors are properly seated and secured.
- Turn the shore power pedestal breaker ON.
- Check the digital display to verify the incoming line-to-line shore power voltage before operating onboard loads.
Important Use Information
- For use only with compatible 50A 120/240V marine shore power systems.
- Maximum continuous current is 50 amps.
- Do not use damaged, burned, loose, corroded, or overheated plugs, receptacles, cords, or connectors.
- Keep all locking collars fully engaged during use to help maintain a secure, weather-resistant connection.
- Do not submerge the surge protector or any shore power connection.
- Position the enclosure where it will not be subjected to standing water, excessive mechanical stress, or damage from dock traffic.
- Always disconnect shore power before inspecting or servicing the unit.
- The digital display indicates line-to-line voltage only. It is not a substitute for a complete shore power wiring or pedestal fault analyzer.
Recommended connection:
Shore Power Pedestal → MSP50A-1 Surge Protector → 50A Marine Shore Power Cord or Boat Inlet
Warranty
Bad Wolf surge protection devices include a 5-year product warranty.
Eligible products may also include connected equipment warranty coverage when properly installed and registered according to the warranty terms.
Please review the full warranty terms for complete details, limitations, registration requirements, and coverage information.
FAQ
What is the MSP50A-1 designed for?
The Bad Wolf MSP50A-1 is designed for 50 amp 120/240V marine shore power systems. It installs inline between the marina shore power pedestal and the boat or between the pedestal and a compatible 50A marine shore power extension cord.
What is the surge current rating?
The MSP50A-1 has a 50,000 amp (50kA) surge current rating.
How much current can the MSP50A-1 continuously carry?
The MSP50A-1 is designed for a maximum continuous current of 50 amps on a 120/240V marine shore power system.
What does the digital display show?
The built-in digital voltmeter displays the incoming line-to-line voltage between the two hot conductors. On a normal 120/240V shore power connection, the display will typically show voltage near 240V.
Does the digital display check for reverse polarity, open neutral, or open ground?
No. The digital display provides a line-to-line voltage reading only. It is not intended to replace a complete shore power pedestal or wiring fault analyzer.
What connectors are used on the MSP50A-1?
The MSP50A-1 uses a SS2-50P male connector and a SS2-50R female connector with threaded locking collars for secure marine shore power connections.
Can the MSP50A-1 connect directly to my boat?
Yes. When the boat has a compatible 50A marine shore power inlet, the MSP50A-1 can be connected between the shore power pedestal and the boat. It can also be used between the pedestal and a compatible 50A marine shore power extension cord.
Is the MSP50A-1 available in different lengths?
Yes. The standard MSP50A-1 is approximately 26 inches overall length. Additional versions are available in approximately 6 ft, 10 ft, and 15 ft overall lengths. Other custom lengths may also be available.
How is the overall length measured?
Overall length is measured from the extreme end of the male shore power connector to the extreme end of the female shore power connector.
What are the electrical protection ratings?
The MSP50A-1 has a 50kA surge current rating, 150/300V MCOV, and 500/1000V VPR.
Is the enclosure suitable for marine use?
The surge protection components are housed in a rugged NEMA 4X enclosure. The marine locking connectors use threaded collars to help create secure, weather-resistant connections when properly mated and tightened.
Specifications
| Model | MSP50A-1 |
|---|---|
| Application | 50A Marine Shore Power |
| System Voltage | 120/240VAC Split Phase |
| Maximum Continuous Current | 50A |
| Surge Current Rating | 50,000A (50kA) |
| MCOV | 150/300V |
| VPR | 500/1000V |
| Voltage Display | Digital Line-to-Line Voltage Display |
| Male Connector | SS2-50P |
| Female Connector | SS2-50R |
| Connector Style | Locking Marine Shore Power with Threaded Collars |
| Enclosure Rating | NEMA 4X |
| Enclosure Dimensions | 7.5 in L × 4.75 in W × 3 in H |
| Standard Overall Length | Approximately 26 in |
| Standard Version Weight | 6.4 lb |
| Available Lengths | 26 in, 6 ft, 10 ft, 15 ft |
| Length Measurement | Measured end-to-end from the extreme end of the male connector to the extreme end of the female connector |
| Country of Manufacture | Made in USA |