1-Phase Buck/Boost Step-Up Transformer (208V Primary to 230V Secondary)
Quick take
This single-phase buck/boost step-up transformer converts 208V AC to 230V AC, letting equipment rated for up to 18.6 amps at 230V run from 208V power. It also provides isolation between the power source and connected device. The main buying caveat is sizing: you must match your required output current and the unit’s kVA/current rating to your load.
Pros and cons
Pros
- Designed for 208V input to 230V output voltage conversion (single phase).
- Isolation helps add an extra safety layer between the source and the connected equipment.
- Compact, wall-mountable design, with integrated mounting brackets.
- Multiple secondary current options depending on configuration (listed secondary amps options).
Cons
- Buyer fit depends heavily on load sizing, since it is rated for a specific output current and kVA class.
- Returns are restricted for transformers, so getting the electrical requirements right before purchase matters.
- Only suitable for single-phase, 50/60Hz use cases.
What buyers think
Buyer-review evidence is limited, so it is not possible to confirm a strong, recurring sentiment pattern around performance or reliability. With minimal feedback available, the best approach is to evaluate this transformer primarily by its electrical specifications and installation requirements, then confirm compatibility for your specific equipment.
What this transformer is for
If your facility or jobsite has 208V AC available but your equipment requires 230V AC, a step-up transformer bridges that gap. This unit is specifically intended to increase voltage from 208V to 230V using a buck/boost approach, and it is built as a single-phase solution.
Key specifications that affect compatibility
Input, output, and phase
- Input (primary): 208 VAC, single-phase
- Output (secondary): 230 VAC
- Frequency: 50/60 Hz
Current and kVA class (sizing matters)
The unit is rated at 4.77 KVA, with a primary maximum of 20 amps and a secondary maximum of 18.6 amps (with the product title indicating secondary current options of 18.6, 20.8, 31.25, or 41.67 amps depending on the variant). Before buying, match the transformer’s output current capability to your equipment’s full-load current draw at 230V.
Build and installation
- Mounting: integrated wall mounting brackets for faster installation
- Enclosure footprint: compact dimensions (about 5.88 in long, 5.19 in wide, 10.5 in tall)
- Weight: about 25 lbs (site planning may benefit from confirming the unit’s actual shipping weight)
Pros and cons in real buying terms
When this is a good fit
- You have 208V power available and need 230V for single-phase equipment.
- Your equipment draws within the transformer’s rated output current at 230V, so voltage conversion without overloading is feasible.
- You want isolation between the power source and the connected device as part of your safety approach.
- Your space allows wall mounting and you prefer a compact transformer footprint.
When you should look elsewhere
- Your system is not single-phase, or your frequency requirements do not align with 50/60Hz operation.
- Your load current is above the transformer’s rated secondary capacity, because undersizing can lead to overheating and unreliable operation.
- You need an easy return path. Transformer returns can be restricted for safety reasons, so double-check electrical compatibility first.
Installation and spec checks to do before you buy
To reduce the risk of mismatch, verify these items with your electrician or electrical design notes:
- Confirm your equipment’s required voltage and current (230V rating, and the operating current your equipment draws).
- Confirm the available utility voltage is truly 208VAC at the transformer location (including any known fluctuations).
- Ensure you are using the correct secondary current configuration for your load, since the product listing references multiple secondary amp options.
- Plan for physical mounting and routing based on the transformer’s dimensions and weight.
Verdict: is it worth it?
This is a practical choice if you specifically need a 208V to 230V single-phase step-up with isolation and a wall-mountable footprint. It is not the right solution if you do not match the transformer’s rated current capacity to your equipment. If your power and load requirements line up, the value comes from solving a common site mismatch problem without requiring a larger-format transformer setup.
FAQ
What does a 1-phase buck/boost step-up transformer do?
It converts a lower AC line voltage to a higher output voltage for compatible equipment. In this case, it is designed to step 208V up to 230V for single-phase loads, while also providing electrical isolation between the source and connected device.
Is this transformer compatible with 50Hz and 60Hz power?
Yes. It is rated for 50/60 Hz operation.
How do I choose the right secondary current option?
You should size the transformer based on your equipment’s required current at 230V. The listing indicates secondary current options (including 18.6 amps and additional configurations), so confirm your load falls within the transformer’s rated secondary capability.
What happens if my equipment draws too much current?
If the equipment’s operating current exceeds what the transformer is rated to supply, you risk poor performance and overheating. For safety and reliability, match your load current to the transformer’s output current and kVA rating.
Is this suitable for outdoor use?
The unit is described as suitable for both indoor and outdoor applications. Still, confirm your installation environment, weather protection needs, and local electrical code requirements.
Can I return this transformer if I ordered the wrong voltage or current?
Transformer returns can be restricted for safety reasons. Because of that, it is important to confirm voltage, phase, frequency, and current sizing before purchase.
Specifications
| Product Title | 1-Phase Buck/Boost Step-Up Transformer - 208V Primary - 230V Secondary - 18.6, 20.8, 31.25 or 41.67 Amps - 50/60Hz |
|---|---|
| Category | Electronics > Power Accessories > Isolation Transformers |
| Brand | Larson Electronics |
| Manufacturer | Larson Electronics LLC |
| Item Weight | 17 Pounds |
| Brand Name | Larson Electronics |
| Model | 154628 |
| Part Number | 154628 |
| Current Rating | 20 Amps |
| Maximum Frequency | 60 Hz |
| Number of Items | 1 |
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