1-Phase Buck/Boost Step-Down Transformer - 230V Primary - 208V Secondary - 20 Amps - 50/60Hz


Sale price$619.99




MT-BBT-230V-208V-20A Buck and Boost Step-Down Transformer Ratings
Transformer Type: Buck/Boost Step-Down Autotransformer NRTL Listed for United States
Transformer Configuration: Buck (Decrease) CSA Certified for Canada
Phase: Single Phase NEMA 3R Indoor/Outdoor Enclosure
Frequency: 50/60 Hz Meets or Exceeds NEMA ST-20 Standards
Input Voltage: 230V AC Buck and Boost Step-Down Transformer
Primary Amps: 18.6A @ 230V
Primary Configuration: Two Winding
kVA: 9.54
Output Voltage: 208V AC
Secondary Amps: 20A @ 208V
Voltage Difference: 22V
Voltage % Difference: 90%
Secondary Configuration: Two Winding
Winding Material: Aluminum
Knockouts: Side and Rear
Wiring Termination: Front Access Copper Tabs or Lead Wires
Cooling: Air / Dry Type
Insulation: 130°C
Temperature Rise: 80°C
Sound Level: 36 dB
Efficiency: 96%
Enclosure Rating: NEMA 3R
Encapsulation: Silica Sand, Resin Compounds
Enclosure Material: Steel
Finish: ANSI 61 Grey
Mounting: Wall Mount via Mounting Tabs
Dimensions: 9.30"-H x 5.06"-W x 4.56"-D
Weight: 15 lb
Wiring: Use Wiring Diagram D, includes Wire Nuts and Lug Terminals


Product Overview


1-Phase Buck/Boost Step-Down Transformer - 230V Primary - 208V Secondary - 20 Amps - 50/60Hz

The MT-BBT-230V-208V-20A Single Phase Step-Down Buck and Boost Transformer from Larson Electronics is powerful, reliable, and designed with the environment in mind. This transformer is designed to decrease 230 volts to 208 volts, and is needed when the line-voltage is lower than the required voltage for equipment. Suitable for both indoor and outdoor applications, the MT-BBT-230V-208V-20A provides increased reliability, higher efficiency, protection against critical equipment failures, and an extra level of protection by isolating the power source from the connected device. The lower operating costs, lower heat emissions, and lower cost of ownership make this transformer ideal for a wide range of applications and businesses.


Transformer Features: The MT-BBT-230V-208V-20A buck and boost transformer is a single phase unit with a 9.54 kVA rating and a primary voltage of 230V AC using a maximum of 18.6 amps on the primary side. This step-down transformer has a secondary voltage of 208V and provides up to 20 amps available on the secondary side. Featuring robust construction, this unit's cores are manufactured with non-aging, cold-rolled silicon steel laminations using state of the art technology.

The MT-BBT-230V-208V-20A is designed to decrease voltage from an input voltage of 230 volts to an output voltage of 208 volts. The decrease of voltage is necessary when the on-site line-voltage is consistently higher than the voltage required by the equipment being operated or installed, preserving the lifespan of the equipment and guarantees correct operation without risking damage due to incorrect voltage. This step-down transformer will allow equipment that draws up to 20 amps at 208V to be powered from 230V power sources. Situations for this type of transformer may include lower voltage from your electrical provider or within the existing establishment, or operating equipment that requires a lower voltage than is provided at the existing establishment.

This unit boasts a low cost of ownership and is highly energy efficient. Lower heat emissions mean less cooling is needed as well. The NEMA 3R painted steel enclosure makes the unit suitable for both indoor and outdoor applications. This step-down transformer can be wall mounted. The MT-BBT-230V-208V-20A features a 130°C insulation with a 80°C temperature rise.

Construction: The aluminum winding in the MT-BBT-230V-208V-20A are formed from high quality aluminum wire helps to improve performance. The close tolerances used during manufacturing also eliminate burrs which hinder performance. Each core is specially coated to prevent the ingress of moisture and are electrically balanced to minimize axial forces during short circuit situations. Buck and boost transformers are designed to maximize the performance and life of electrical equipment. The MT-BBT-230V-208V-20A is encapsulated in silica sand and resin, and cased in a NEMA 3R steel enclosure. NEMA 4, NEMA 4X, and NEMA 12 enclosures are available upon request.


Benefits: The MT-BBT-230V-208V-20A buck/boost step-down transformer offers many benefits to the consumer. Buck/boost transformers pass the majority of the load voltage directly through the transformer, only transforming a small percentage of the load. Due to this technology, a smaller and quieter step-down transformer is manufactured and uses less material. This provides owners with significant energy savings as well as offering environmental benefits.

Higher efficiency extends the life of the transformer and turn into cost savings for owners in the form of lower energy bills and a decrease cost of ownership when compared to large autotransformers. Installation and maintenance costs are reduced due to the smaller form factor, and less overall space requirements are decreased. In addition, these step-down transformers operate quieter than a standard autotransformer of the same capacity.

Mounting: Integrated wall mounting brackets make installation fast and easy. Because of the smaller overall footprint, heavy machinery is rarely needed for mounting and installation.

Installation: Installation is simple. Connect the primary leads and secondary leads to the step-down transformer per the provided wiring diagram. Knockout hubs on both side and the bottom of the transformer allow for easy line-in and line-out wiring. The front access cover provides convenient access to the four lead wires and four copper lugs. The MT-BBT-230V-208V-20A is shipped with the necessary wire nuts and lug terminals for wiring this step-down transformer in-line between line voltage and equipment.

Applications: Air conditioners, lighting systems, heating elements, motor applications and other applications that require the ability to power loads that differ from the available line voltage.

Limitations: While there are many benefits to a buck/boost transformer, there are some limitations to consider. This transformer will only transformer voltage, it will not convert phases, it will not create even legs between line 1 and line 2 (L1 and L2 WILL be UNEVEN), has no circuit isolation, and does not create a neutral for applications where a neutral is not already present. If any of these limitations apply to you, you will need a standard transformer. Please see below link for our standard line of industrial transformers or our line of phase converters.

Note on Phases: This buck/boost transformer is a single phase step-down transformers. For three phase transformers, click on the following links:
Three Phase Delta Buck/Boost Transformers
Three Phase Wye Buck/Boost Transformers

Shipping and delivery Information


American Express Apple Pay Diners Club Discover Google Pay Mastercard PayPal Shop Pay Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

You may also like

Recently viewed