A transfer switch automatic backup unit has one job: shift your circuits from the main supply to a generator or secondary source when the utility drops. Here is how the 63A 4P ATS kit and the 3P 100A transfer switch compare.
Quick verdict
For a 60Hz four-pole panel, the $43.95 63A 4P ATS kit gives you an indicator light and included manual. For a 100A three-pole service, the $53.81 3P 100A transfer switch steps up the capacity.
Side-by-side comparison
| Specification | 63A 4P ATS kit | 3P 100A transfer switch |
|---|---|---|
| Price | USD 43.95 | USD 53.81 |
| Poles / current | 4P, 6A-63A line range | 3P, 100A rating |
| Conversion time | 2s or so | <0.1s |
| Frequency | 60Hz | 50/60Hz |
| Switching level | CB level | PC class |
| Insulation voltage | AC690V | 690V AC |
| Mounting / dimensions | 198mm x 122mm, M6 hole | Wall-mounted |
What matters most
Before choosing, think about the frequency of your supply. The 63A kit is listed for 60Hz only, while the 3P unit covers 50/60Hz. Think about the mounting location too: the 63A kit gives you panel dimensions and an M6 hole, while the 3P unit is wall-mounted. Both are new automatic transfer switches, but the 63A kit leans toward a ready-to-wire starter package, while the 3P unit is more of a standalone wall-mount device. The changeover gap between the two units is one of the few ways they genuinely differ, so weigh it against the price difference.
Where each product wins
- 63A 4P ATS kit: indicator light display, included manual, and stated installation dimensions.
- 3P 100A transfer switch: faster changeover, higher-capacity switching, 50/60Hz support, and cold-rolled sheet construction.
Product notes
Dual Power Automatic Transfer Switch kit 63A 4P ATS
The Dual Power Automatic Transfer Switch kit 63A 4P ATS is a CB-level changeover switch with an indicator light display. The package contents are specified as one switch and one manual, which makes for an easier install. The stated installation dimensions of 198mm by 122mm with an M6 hole are useful when laying out the panel, and the operating voltage is rated at AC240V. Its line current range of 6A to 63A makes it suitable for moderate current service. The main limitation is the 60Hz operating frequency; if your installation runs at 50Hz, look elsewhere. For a 60Hz panel in the 6A-63A range, this kit is the complete switch-and-manual package.
Automatic Transfer Switch 3P 100A
The Automatic Transfer Switch 3P 100A is built for higher-current service. It uses PC-class automatic generator switching, and its cold-rolled sheet body with a plastic spraying process is described as solid and rust-inhibiting. The wall-mounted format makes installation planning straightforward, and the Off-White finish is part of the same construction. The 690V AC insulation voltage with 8KV impact withstand voltage is a robust electrical spec. The trade-off is that this switching format cannot cover a four-pole panel; that sort of installation needs a different unit. For higher-current service that benefits from a wall-mounted body, this switch is the sturdy choice.
Final choice by use case
Choose the Dual Power Automatic Transfer Switch kit 63A 4P ATS for a 60Hz four-pole panel. Choose the Automatic Transfer Switch 3P 100A for higher-current three-pole service and a wall-mounted body.
