---
product_id: 69604938
title: "4PRO ATS-100A-4P-i Automatic Transfer Changeover Switch, 4 Pole, 100A, 120/208V, 50/60Hz, 2-3 Phase"
brand: "4pro"
price: "$516.07"
currency: USD
in_stock: true
url: https://www.desertcart.us/products/69604938-4pro-ats-100a-4p-i-automatic-transfer-changeover-switch-4
store_origin: US
region: United States of America
---

# 100A heavy-duty current rating Ethernet remote connectivity 3-phase auto/manual transfer 4PRO ATS-100A-4P-i Automatic Transfer Changeover Switch, 4 Pole, 100A, 120/208V, 50/60Hz, 2-3 Phase

**Brand:** 4pro
**Price:** $516.07
**Availability:** ✅ In Stock

## Summary

> ⚡ Stay powered, stay ahead — never miss a beat with 4PRO ATS-100A-4P-i!

## Quick Answers

- **What is this?** 4PRO ATS-100A-4P-i Automatic Transfer Changeover Switch, 4 Pole, 100A, 120/208V, 50/60Hz, 2-3 Phase by 4pro
- **How much does it cost?** $516.07 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/69604938-4pro-ats-100a-4p-i-automatic-transfer-changeover-switch-4)

## Best For

- 4pro enthusiasts

## Why This Product

- Trusted 4pro brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Robust Safety Locks:** Mechanical and electric interlocks plus fire linkage compliance for ultimate reliability
- • **Configurable Control:** Front panel adjustable delays and modes with remote start via Ethernet connectivity
- • **Universal Compatibility:** Works flawlessly with 1-3 phase gasoline and diesel gensets across 120/208V systems
- • **Seamless Power Switching:** Automatic and manual load transfer for uninterrupted energy flow
- • **Smart Voltage Monitoring:** True RMS phase-to-phase voltage display on external LCD for precision control

## Overview

The 4PRO ATS-100A-4P-i is a microprocessor-controlled 4-pole automatic transfer switch designed for 2-3 phase, 100A, 120/208V power systems. It ensures seamless switching between main and backup power sources with real-time voltage monitoring, remote Ethernet control, and robust safety interlocks, making it an essential upgrade for professional-grade power reliability.

## Description

4PRO ATS-100A-4P-i Automatic Transfer Changeover Switch, 4 pole, 100A, 120/208V, 50/60Hz, 2-3 phase The ATS-100A-4P-i changeover switch is an microprocessor based intellectual device designed to transfer loads automatically and manually from one power source to another in a wide variety of 2-3 phase applications. The unit monitors 3-phase normal and reserve source voltages, sends remote start command to the generating set and performs changeover switching between those 2 sources connecting the load circuits to a power source having voltages within preset limits. Device has a manual load switch lever, a manual/auto mode switch and a mechanical locking. Inputs and outputs: fire linkage control, generator remote start, external indicators. The front panel leds provide information about mains and generator power availability as well as a current switch positions. External display shows phase voltages (phase-phase), current workign mode and etc. It can be placed in a distance of 1-3 meters from the device via standard Ethernet cable. Power source voltage limits, transfer-, start- and stop delays and transfer modes are front panel configurable. Note: The delays apply only in case if the device is connected to 24VDC auxiliary power supply. Features  compatible with 120/208VAC 3 phase and 120/240 2 phase 50/60 Hz applications;  displays phase-phase voltages and current state on external LCD Display;  3 working positions: main power ON - backup power OFF; main power OFF - backup power ON; main and backup power OFF;  double complex contacts/ horizontal pulling mechanism/micro motor energy pre-storage and microcomputer control technology;  reliable mechanical interlock and electric interlock;  "Zero Position" technology. Device can be set to Zero Position under emergency situations with two way power supply cut off meeting the fire linkage requirements;

## Features

- Works with any contactors and changeover switch types
- Suitable for 1-3 phase gasoline and diesel gensets
- True RMS measurements
- Provides external voltage adjustment feature

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07DL7P44Y |
| Actuator Type | Push Button |
| Brand | 4PRO |
| Circuit Type | 2-way |
| Connectivity Protocol | Ethernet |
| Connector Type | Auxiliary |
| Control Method | Remote |
| Current Rating | 100 Amps |
| Date First Available | June 15, 2018 |
| International Protection Rating | IP54 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 9.02 pounds |
| Item dimensions L x W x H | 12.99 x 4.53 x 7.17 inches |
| Manufacturer | 4PRO |
| Number of Positions | 3 |
| Operating Voltage | 208 Volts |
| Operation Mode | Automatic |
| Product Dimensions | 12.99 x 4.53 x 7.17 inches |
| Unit Count | 1 Count |

## Product Details

- **Actuator Type:** Push Button
- **Brand:** 4PRO
- **Circuit Type:** 2-way
- **Connector Type:** Auxiliary
- **Current Rating:** 100 Amps
- **Item dimensions L x W x H:** 12.99 x 4.53 x 7.17 inches
- **Material:** Copper
- **Mounting Type:** Panel Mount
- **Operating Voltage:** 208 Volts
- **Operation Mode:** Automatic

## Images

![4PRO ATS-100A-4P-i Automatic Transfer Changeover Switch, 4 Pole, 100A, 120/208V, 50/60Hz, 2-3 Phase - Image 1](https://m.media-amazon.com/images/I/91NmijpqQ0L.jpg)
![4PRO ATS-100A-4P-i Automatic Transfer Changeover Switch, 4 Pole, 100A, 120/208V, 50/60Hz, 2-3 Phase - Image 2](https://m.media-amazon.com/images/I/81rwK1lB9rL.jpg)
![4PRO ATS-100A-4P-i Automatic Transfer Changeover Switch, 4 Pole, 100A, 120/208V, 50/60Hz, 2-3 Phase - Image 3](https://m.media-amazon.com/images/I/813lhsogH4L.jpg)
![4PRO ATS-100A-4P-i Automatic Transfer Changeover Switch, 4 Pole, 100A, 120/208V, 50/60Hz, 2-3 Phase - Image 4](https://m.media-amazon.com/images/I/81S6a2vHUQL.jpg)
![4PRO ATS-100A-4P-i Automatic Transfer Changeover Switch, 4 Pole, 100A, 120/208V, 50/60Hz, 2-3 Phase - Image 5](https://m.media-amazon.com/images/I/815tb46yWUL.jpg)

## Questions & Answers

**Q: Hello, will this work with a Honda EU6500is generator without buying additional components?**
A: This ATS switch is compatible with any type of generators having a remote start input. 
In case, if your generator controller does not have the remote start input, you can install one of non-expensive controllers having such input there. 
For example, it could be this model:

SMARTGEN MGC100 Manual/Remote Start Generator Controller Module
https://www.amazon.com/SMARTGEN-MGC100-Manual-Generator-Controller/dp/B06WWQVHPY/

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-07*