1-Phase Buck/Boost Step-Down Transformer - 245V Primary - 220V Secondary - 22.89, 34.33 or 68.67 Amps - 50/60Hz

What buyers think

Buyer-review evidence is limited, but the available feedback highlights two consistent themes: wiring and setup are reported as straightforward, and the transformer can help correct an incoming voltage level that is too high for the connected equipment.

What this transformer does (and where it fits)

This is a single-phase buck/boost transformer meant to deliver 220V on the secondary side from a 245V primary source. It is intended for situations where connected equipment must run at (or closer to) 220V, especially when the supply voltage can be outside the equipment’s ideal operating range.

Because it also emphasizes isolation between the power source and the connected device, it is a category fit for shoppers who want more than a simple voltage match, they also want separation intended to help protect sensitive equipment.

Key specs to match to your equipment

Before buying, the most important step is confirming the electrical match. Here are the decision-critical specs to verify for your application:

• Input (primary): 245V, single phase (50/60Hz).
• Output (secondary): 220V, with available secondary current options of 22.89A, 34.33A, or 68.67A.
• Power rating: 5.1 kVA.
• Primary current (maximum): 20.83A.
• Enclosure and mounting: NEMA 3R painted steel enclosure, wall mount.
• Thermal design: 180°C insulation, 115°C temperature rise.

Pros and cons for real-world installation

Pros: why shoppers consider this type of transformer

• Outdoor-capable enclosure: NEMA 3R construction supports installs where weather resistance matters.
• Voltage correction with isolation emphasis: the buck/boost approach targets the right output voltage, and the isolation goal can be valuable for protecting connected equipment.
• Built for sustained electrical use: the insulation and temperature-rise ratings support reliable operation under designed conditions.

Cons: what to watch for before you commit

• Choose the correct current variant: the transformer is offered with different secondary current outputs, so make sure the selected option aligns with your equipment load requirements.
• Return policy constraints: transformers cannot be returned for safety reasons, and once units leave the factory they must be destroyed.

Who should buy it

• You have single-phase power and need a 245V primary system to produce 220V secondary.
• You want a NEMA 3R wall-mount enclosure suitable for indoor or outdoor placement.
• Your connected equipment benefits from electrical isolation between input and output, not just a voltage step-down.
• You are comfortable confirming current and kVA requirements up front, because this is not the kind of product you can easily “return and try again.”

Who should avoid it

• You need three-phase transformation, because this unit is single phase.
• Your installation requires a different primary voltage, or a different output voltage than 220V.
• You are uncertain about your required secondary current, since picking the wrong current option could lead to poor performance or incompatibility.

Is it worth it?

This transformer is likely worth it when your primary need is a verified 245V to 220V single-phase conversion, and you also value the product category’s isolation/protection goal. The value proposition strengthens when outdoor mounting matters (NEMA 3R) and when you are confident selecting the correct secondary current option. The return restriction is a real practical factor, so it is best for buyers who can accurately size the load and confirm the electrical fit.

Alternatives to consider

If you are comparing options, focus on these categories of differences rather than brand names:

• Voltage and phase match: ensure the primary and output voltages, and single-phase vs three-phase, match your equipment.
• Load handling: confirm whether you need the lower or higher secondary current option, based on your equipment’s steady load (and any startup surge considerations).
• Enclosure/environment: if you need outdoor mounting, prioritize NEMA-rated enclosures appropriate for your location.
• Isolation needs: for equipment that benefits from isolation, compare isolation transformer designs rather than simple autotransformers.

Price and availability

Check current pricing and listing details on Amazon, since availability and variant selection can change.

Buy on Amazon

FAQs

What does a buck/boost step-down transformer mean?

It is designed to adjust voltage so the output stays closer to a target level, even when input voltage varies. In this case, it targets a 220V secondary output from a 245V primary input for single-phase systems.

What voltage does this transformer output?

The secondary output is 220V.

Is this transformer suitable for outdoor installation?

Yes, it uses a NEMA 3R painted steel enclosure and is described as suitable for indoor or outdoor applications, with wall-mount capability.

How do I choose between the 22.89A, 34.33A, and 68.67A versions?

You should select the variant that matches your equipment’s required current on the 220V secondary side. Also confirm the overall load fits within the transformer’s 5.1 kVA rating.

Can I return this transformer if it is not the right fit?

Returns are not accepted for transformers for safety reasons, and once units leave the factory they cannot be resold.

Is this isolation transformer good for protecting sensitive equipment?

It is built with an isolation purpose, which can help separate the connected device from the power source. If your device needs isolation and voltage conversion, it can be a reasonable category match.

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