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Product Specifications:
| Item | Class 2 Transformer |
| Connection - Primary | Wire Lead |
| Connection - Secondary | Wire Leads |
| Depth | 2 1/4" |
| Enclosure Finish | No Finish |
| Enclosure Rating | Not Rated |
| Enclosure Style | Open |
| Enclosure Type | Open |
| Frequency | 50/60 Hz |
| Height | 2.55" |
| Input Voltage | 115V AC |
| Mounting | Foot |
| Nema Enclosure Rating | Not Rated |
| Operating Temperature - Maximum | 120°F |
| Operating Temperature - Minimum | 32°F |
| Output Voltage | 24/28V AC |
| Overall Depth | 2.5" |
| Overall Height | 2 3/5" |
| Overall Width | 4 1/4" |
| Phase | 1 |
| Power Rating | 100 VA |
| Secondary Connection | Solder Terminals |
| Standards | RoHS |
| Temp. Rise | 49°C |
| Temperature Rise | 120°F |
| Va Rating - Transformer | 100 VA |
| Width | 3.62" |
Shipping Info:
| Ship weight (kg) | 1.49 |
| Ship height (cm) | 6.48 |
| Ship length (cm) | 5.72 |
| Ship width (cm) | 9.19 |
| HS code | 8504314065 |
| Country of Origin | US |
Product Details:
Altronix T2428100 open-frame transformer is ideal for supplying reliable & stable power to electronic power supplies or equipment and safeguarding critical systems against outages and voltage fluctuations.
Features:
- It has operating temperatures ranging from 32 to 120 degrees F, ensuring reliable performance in a broad spectrum of environmental conditions.
- This open-frame transformer offers a relative humidity tolerance of 85% +/- 5%, ensuring it functions effectively in moderately humid conditions.
- It is equipped with a heat dissipation capability of approximately 52 BTUh, which is important in applications requiring effective heat management.
- This transformer has a system AC input VA requirement of 115VA, ensuring efficient power consumption and compatibility with various electrical systems.
Frequently Asked Questions:
Q. How to install Altronix T2428100 step-down transformer?
A.
- Begin by securing the transformer in your preferred location or enclosure, referring to the provided transformer drawing and dimensions.
- Next, establish the connection by supplying 115VAC, 50 / 60 Hz AC power to the primary leads, which are designated as black and white. You can find specific instructions in the wiring configuration section.
- To ensure the safety of your devices, it is crucial to measure the output voltage across the secondary leads before connecting them. This step is detailed in the wiring configuration section and serves to prevent potential damage.
- If you require 24VAC, use the yellow and brown leads, which have an open circuit voltage of approximately 26.1VAC when supplied with 115VAC.
- For 28VAC, rely on the black and brown leads, providing an open circuit voltage of approximately 30.4VAC when powered by 115VAC.
- Finally, establish connections for your 24VAC devices using the yellow and brown leads, and for 28VAC devices.
Q. How to maintain this transformer?
A.
- Inspect wiring for damage and wear. Tighten loose connections and secure terminals.
- Conduct routine tests to measure the output voltage. Compare readings with specified values in the documentation.
- Adjust for environmental conditions, especially in corrosive environments.
- Monitor operating temperature to prevent overheating.
- Promptly replace damaged components using approved parts.
- Consider periodic inspection by a qualified professional, especially in critical applications.
Q. What factors should I consider when installing Altronix T2428100 open frame transformer?
A. Ensure it is installed in a well-ventilated and dry location away from potential water exposure. Take into account the voltage requirements of the devices it powers and the distance between the transformer and these devices for efficient power distribution.
Product Variants
| Product | Model | Input Voltage | Output Voltage | Secondary Connection | Height | Mounting | Enclosure Finish | Temp. Rise | Enclosure Rating | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
![]() |
T16100 | 115V AC | 16V AC | Solder Terminals | 2 1/4" | Foot | No Finish | 49°C | Not Rated | €125.83 | |
![]() |
T1656 | 115V AC | 16V AC | Solder Terminals | 1.87" | Foot | No Finish | 49°C | Not Rated | €94.68 | |
![]() |
T24130D | 115/220V AC | 24V AC | Wire Leads | 2.57" | Foot | No Finish | 49°C | Not Rated | €103.33 | |
![]() |
T2856 | 115V AC | 28V AC | Solder Terminals | 2 1/4" | Foot | No Finish | 49°C | Not Rated | €93.49 | |
![]() |
T2885D | 115/220V AC | 28V AC | Solder Terminals | 2.57" | Foot | No Finish | 49°C | Not Rated | €114.01 |
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ALTRONIX T2428100 Step Down Transformer, 24VAC / 100VA, Open Frame
€103.69 /unit



