Southwire Surge Guard 40350-RVC Automatic Transfer Switch 50A
- 50A, 120/240V, 60 Hz
- 65A FLA mechanical interlocking contactors
- Generator priority after a 30 second delay
- RV-C communications for voltage, current and fault display
- Multi-mode surge suppression, fuse protected
- UL 1008 conforming
Updated 20 days ago · Based on the Amazon listing and published specifications, not hands-on testing.
An RV transfer switch that also guards against bad park power and reports faults to an RV-C display. Its voltage cutoffs are listed two ways, so confirm the thresholds.
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ASIN: B099F5S9Z5Model: Surge Guard 40350-RVCCategory: Transfer Switches
Overview
Mechanically interlocked contactors inside the Southwire switch move an RV's load center between shore power and generator, giving the generator priority after a short delay when both are live. Built-in protection cuts power on miswired or faulty pedestals.
Combining a transfer switch with full surge and wiring protection saves a separate surge guard at the pedestal. RV-C data lets the coach display show voltage, current and faults. The low voltage cutoff differs between bullets and description.
Who it's for
Larger motorhomes and fifth wheels with a generator, shore power and RV-C monitoring. Owners of smaller RVs or rigs without a generator should look at a plain surge protector.
Pros and cons
- Transfer switch and surge guard in one
- Protects against miswired pedestals
- RV-C fault and power display
- Input lights for both legs
- Low voltage cutoff listed inconsistently
- Remote display not listed as included
- Requires hardwired installation
Performance notes
The contactors physically cannot close on both sources at once, which prevents feeding generator power back to the pedestal. Monitoring circuits watch voltage, polarity, ground and frequency and drop the load when a fault appears. The generator delay lets it stabilize before taking load.
Specifications
| Brand | Southwire |
|---|---|
| Model | Surge Guard 40350-RVC |
| Dimensions & fit | |
| Product dimensions | 14 x 9 x 6 inches |
| Item weight | 11.4 pounds |
| Power & efficiency | |
| Amperage | 50 A |
| Voltage | 120/240 V |
| Voltage protection | Low below 102V (description lists 95V), high above 132V |
| Other details | |
| Contact Type | 65A FLA mechanical interlocking contactors |
| Control Type | RV-C communications |
| Frequency | 60 Hz |
| Operation Mode | Automatic, generator dominates after 30 second delay |
| Position | Outside |
| Special Features | Multi-mode surge suppression (fuse protected); protects against open ground, open neutral, reverse polarity, miswired pedestal, high and low frequency |
| Specification Met | UL 1008 |
Frequently asked questions
How big is the Southwire 40350-RVC?
It measures 14 x 9 x 6 inches and weighs 11.4 pounds.
What happens when shore and generator power are both on with the Southwire 40350-RVC?
The generator takes priority after a 30 second delay.
Does the Southwire 40350-RVC replace a pedestal surge protector?
It provides multi-mode surge suppression plus open ground, open neutral, voltage, polarity and frequency protection.