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Product Detailed Parameters
- Description：PWR XFMR LAMINATED 1.1VA TH
- Series：164
- Mfr：Hammond Manufacturing
- Package：Bulk
- Type：Laminated Core
- Voltage - Primary：115V
- Voltage - Secondary (Full Load)：Parallel 14V, Series 28V
- Current - Output (Max)：Parallel 80mA, Series 40mA
- Primary Winding(s)：Single
- Secondary Winding(s)：Dual
- Center Tap：No
- Power - Max：1.1VA
- Mounting Type：Through Hole
- Termination Style：PC Pin
- Size / Dimension：34.93mm L x 28.56mm W
- Height - Seated (Max)：33.32mm
- Voltage - Isolation：2500Vrms
- Weight：0.17 lb (77.11 g)
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Overview
The Hammond Manufacturing 164D28 is a low-voltage power transformer designed for printed circuit board (PCB) mounting. It features a single primary winding rated at 115 VAC and a dual secondary winding configuration providing 28 VAC center-tapped output. The unit has a power rating of 1.1 VA, with a secondary current capacity of 0.04 A. It operates at 50/60 Hz frequencies and utilizes a through-hole installation style. The physical dimensions are 1.44 inches in length, 1.94 inches in width, and 1.69 inches in height.
Feature Summary
- Low profile design optimized for space-constrained PCB applications
- Dual secondary winding configuration with center tap for versatile voltage requirements
- Through-hole mounting style ensures secure attachment to circuit boards
Applications
- Low voltage power supply circuits requiring isolated AC outputs
- Electronic equipment utilizing center-tapped rectification topologies
- Control transformers for signal processing or relay driving stages
Procurement Notes
Verify the specific voltage ratings and physical footprint against your schematic before ordering. Confirm that the 1.1 VA power rating meets the load requirements of your application. Ensure compatibility with standard through-hole assembly processes. Check for any regional shipping restrictions or RoHS compliance documentation required for your jurisdiction.
Selection Notes
Select this component when a compact, low-power transformer is needed for 115V primary systems. The center-tapped secondary allows for full-wave rectification without additional components. Consider the low profile height if vertical clearance on the PCB is limited. Verify that the 0.04A secondary current is sufficient for the intended downstream circuitry loads.
Part Context
This transformer belongs to Hammond's line of board-mount power transformers. It serves as a step-down solution for converting standard mains voltage to lower levels suitable for sensitive electronics. The open construction type requires integration into a larger enclosure for environmental protection and safety isolation.
Replacement Considerations
No public confirmed substitute part numbers are available in the provided documentation.
