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Product Detailed Parameters
- Description：PWR XFMR LAMINATED 2.5VA TH
- Series：International PC Plug-In
- Mfr：Pulse Electronics
- Package：Bulk
- Type：Laminated Core
- Voltage - Primary：115V, 230V
- Voltage - Secondary (Full Load)：Parallel 14V, Series 28V
- Current - Output (Max)：Parallel 180mA, Series 90mA
- Primary Winding(s)：Dual
- Secondary Winding(s)：Single, Multiple Taps
- Center Tap：No
- Power - Max：2.5VA
- Mounting Type：Through Hole
- Termination Style：PC Pin
- Size / Dimension：41.28mm L x 33.32mm W
- Height - Seated (Max)：28.58mm
- Voltage - Isolation：-
- Weight：0.25 lb (113.4 g)
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Overview
The Pulse Electronics 14A-2.5-28B31 is a split bobbin power transformer with a 2.5VA rating and laminated core construction. It features dual primary windings supporting 115V and 230V input voltages, along with single or multiple tap secondary windings. The component utilizes through-hole mounting with PC pin terminals and has a maximum seated height of 28.58mm. It is RoHS compliant and designed for general power conversion applications requiring isolated voltage transformation.
Feature Summary
- Split bobbin design with laminated core for efficient magnetic coupling
- Dual primary winding configuration supporting 115V and 230V operation
- Through-hole mounting with PC pin terminal style
- RoHS compliant construction
Applications
- General purpose power supply units
- Industrial control systems
- Consumer electronics power stages
Procurement Notes
Verify the specific secondary winding configuration and tap options required for your circuit design, as the datasheet indicates single or multiple tap variations. Confirm that the 2.5VA power rating and 28.58mm height constraints fit within your enclosure specifications. Ensure compatibility with the intended primary voltage (115V or 230V) before procurement.
Selection Notes
Select this component when a low-power, isolated transformer with dual primary voltage capability is needed. The split bobbin construction offers distinct advantages for certain winding configurations compared to toroidal cores. Consider the through-hole form factor if surface-mount alternatives are not suitable for your assembly process or thermal requirements.
Part Context
This part belongs to Pulse Electronics' line of laminated core power transformers. The '14A' series typically denotes specific physical dimensions and mounting styles. The '2.5' indicates the 2.5VA power rating, while '28B31' likely refers to the specific winding configuration and lead style. It serves as a fundamental passive component in AC-to-DC or isolation circuits.
Replacement Considerations
Direct substitutes must match the 2.5VA rating, dual primary winding capability, and similar physical footprint. Verify that any replacement maintains the same insulation class and operating temperature range. Cross-reference secondary voltage outputs and current ratings carefully, as these vary significantly even within the same VA class.
