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Product Detailed Parameters
- Description：PWR XFMR LAMINATED 28VA CHAS MT
- Series：166
- Mfr：Hammond Manufacturing
- Package：Bulk
- Type：Laminated Core
- Voltage - Primary：115V
- Voltage - Secondary (Full Load)：28V
- Current - Output (Max)：1A
- Primary Winding(s)：Single
- Secondary Winding(s)：Single
- Center Tap：Yes
- Power - Max：28VA
- Mounting Type：Chassis Mount
- Termination Style：Wire Leads
- Size / Dimension：82.55mm L x 50.80mm W
- Height - Seated (Max)：50.80mm
- Voltage - Isolation：2000Vrms
- Weight：1.4 lbs (635 g)
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Overview
The Hammond Manufacturing 166J28 is a low voltage industrial power transformer with a 28 VA rating. It features a single primary winding rated for 115 VAC and a single secondary winding providing 28 VAC center-tapped output at 1 A. Designed for chassis mounting, it utilizes wire leads for termination. The unit employs Class B insulation (130°C) and is UL listed as Class A (105°C). Dimensions are 82.55 mm length, 50.80 mm width, and 50.80 mm height.
Feature Summary
- Dual bobbin design eliminates the need for an electrostatic shield
- Class B insulation provides thermal protection up to 130 degrees Celsius
- Chassis mount construction ensures stable installation in equipment racks
Applications
- Industrial control panels requiring low voltage power
- Filament supply circuits for vacuum tubes or heaters
- Rectifier open transformer applications in electronic systems
Procurement Notes
Verify that the specific order matches the 166J28 part number to ensure correct voltage and current ratings. Confirm chassis mounting compatibility with the target enclosure. Check for updated regulatory compliance documentation such as UL listing status and RoHS designation before finalizing procurement decisions.
Selection Notes
Select this component when a 28 VA capacity is required for 115 VAC input systems. The dual bobbin design offers cost efficiency by removing shield requirements. Ensure the application environment supports the specified Class B insulation temperature limits and physical chassis mounting constraints.
Part Context
This transformer belongs to the Hammond 166 series of laminated core power transformers. The series provides various voltages and wattage options for industrial use. The 166J28 specifically addresses low voltage rectifier and filament applications within standard industrial control environments.
Replacement Considerations
Consult official Hammond Manufacturing cross-reference documents for verified substitute part numbers. Do not assume generic equivalents match the dual bobbin design or specific insulation class requirements without explicit manufacturer confirmation.
