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Product Detailed Parameters
- Description：PWR XFMR LAMINATED 7VA CHAS MT
- Series：166
- Mfr：Hammond Manufacturing
- Package：Bulk
- Type：Laminated Core
- Voltage - Primary：115V
- Voltage - Secondary (Full Load)：28V
- Current - Output (Max)：250mA
- Primary Winding(s)：Single
- Secondary Winding(s)：Single
- Center Tap：Yes
- Power - Max：7VA
- Mounting Type：Chassis Mount
- Termination Style：Wire Leads
- Size / Dimension：71.37mm L x 38.10mm W
- Height - Seated (Max)：42.93mm
- Voltage - Isolation：2000Vrms
- Weight：0.7 lb (317.51 g)
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Overview
The Hammond Manufacturing 166F28 is a low voltage industrial power transformer with a 7 VA rating. It features a single primary winding rated for 115 VAC at 60 Hz and a single secondary winding providing 28 VAC center-tapped output. The unit supports a maximum secondary current of 250 mA. Designed for chassis mounting, it utilizes wire leads for termination. Physical dimensions are 71.37 mm in length, 38.1 mm in width, and 42.93 mm in height.
Feature Summary
- Laminated core construction for efficient power conversion
- Single primary and single secondary winding configuration
- Chassis mount installation style with wire lead terminations
Applications
- Industrial control systems
- Low voltage rectifier circuits
- Filament power supply applications
Procurement Notes
Verify the specific part number against official Hammond Manufacturing documentation to ensure accuracy. Confirm that the required electrical parameters match the system design requirements. Check for RoHS compliance status as indicated in the manufacturer specifications. Ensure the chassis mounting style and wire lead termination type are compatible with the intended assembly process before procurement.
Selection Notes
Select this component when a 7 VA capacity is sufficient for the load requirements. The 115 VAC primary input must align with the available supply voltage. The 28 VAC center-tapped secondary output determines the available DC voltage after rectification. Consider the physical footprint constraints, as the chassis mount style requires specific panel cutouts and clearance for the wire leads.
Part Context
This transformer belongs to the Hammond 166 series of industrial control transformers. The series offers various power ratings and voltage configurations to suit different industrial needs. The 166F28 specifically addresses applications requiring low voltage outputs from standard mains input. It is designed for reliability in continuous operation within industrial environments.
Replacement Considerations
Direct substitutes within the same series include models like 166G28 or 166G30, which offer different power ratings but share similar mounting styles. Verify that any replacement maintains the 115 VAC primary specification and fits the existing chassis mounting requirements. Cross-reference datasheets to ensure thermal and electrical compatibility.
