Reliance Pro/Tran 2 306D
#18 in 30 AFull review
The bare bones six circuit Pro/Tran 2. Only worth buying when it is cheaper than the 306C.
Amazon $303.80$303.80
The Reliance Pro/Tran 2 306D rates 3.3 among 30 A transfer switchs; the Reliance Pro/Tran 2 506C rates 3.0 among 50 A ones. The Reliance Pro/Tran 2 306D costs $44.30 less ($303.80 vs $348.10).
Reliance Pro/Tran 2 506C
#7 in 50 AFull review
An affordable 50 A Reliance switch for a large generator that only needs to run a few heavy circuits.
Amazon $348.10$348.10
Prices were last checked October 31, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Scores side by side
These two sit in different rating classes (30 A and 50 A), and each is scored against the reference points for its own class, so a rating says how well each does among its own rating peers. How we rank explains each factor.
| Factor weight | Reliance Pro/Tran 2 306D | Reliance Pro/Tran 2 506C |
|---|---|---|
| Overall rating | 3.3/5 | 3.0/5 |
| Value 35% | 49 $50.63 per circuit ($303.80, 6 circuits) | 39 $58.02 per circuit ($348.10, 6 circuits) |
| Circuits 25% | 33 6 circuits | 0 6 circuits |
| Features 20% | 25 UL listed | 50 wattmeters, UL listed |
| Warranty 20% | 100 5-year warranty | 100 5-year warranty |
Specifications
| Reliance Pro/Tran 2 306D | Reliance Pro/Tran 2 506C | |
|---|---|---|
| Switching | ||
| Type | Manual | Manual |
| Circuits | 6 | 6 |
| Generator connection | 30 A | 50 A |
| Max generator | 7,500 W | 12,500 W |
| Voltage | 120/240 V | 120/240 V |
| Wattmeters | No | Yes |
| In the box | ||
| Inlet | none (wire to a separate inlet box) | none (wire to a separate inlet box) |
| Inlet box included | No | No |
| Generator cord included | No | No |
| Build | ||
| Outdoor rated | No | No |
| UL listed | Yes | Yes |
| Warranty | 5 years | 5 years |