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Product Detailed Parameters
- Description：XFMR LED DR AC/DC CONV 2.8MH TH
- Series：WE-UNIT
- Mfr：Würth Elektronik
- Package：Tray
- Type：For AC/DC Converters
- Applications：LED Drivers, AC/DC SMPS
- Intended Chipset：NCP101x, NCP105x
- Chipset Manufacturer：On Semiconductor
- Voltage - Primary：120 ~ 385V
- Voltage - Auxiliary：-
- Voltage - Isolation：4000Vrms
- Inductance @ Frequency：2.8mH @ 10kHz
- Frequency：132kHz
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Through Hole
- Size / Dimension：0.591" L x 0.433" W (15.00mm x 11.00mm)
- Height - Seated (Max)：0.661" (16.80mm)
- Footprint：0.591" L x 0.433" W (15.00mm x 11.00mm)
- Style：-
- Grade：-
- Qualification：-
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Overview
The Würth Elektronik 7491181024 is a board-mount power transformer from the WE-UNIT series, designed for offline AC/DC converter applications. It features through-hole installation and provides 4000Vrms isolation between primary and secondary windings. The component operates at a frequency of 132kHz with an inductance of 2.8mH at 10kHz. Primary voltage ranges from 120 to 385V, while the secondary output is configured for LED drivers and SMPS systems. Physical dimensions are 15.00mm x 11.00mm with a maximum height of 16.80mm.
Feature Summary
- Provides high-voltage isolation of 4000Vrms for safety-critical offline power supplies
- Optimized for use in LED driver and AC/DC switching mode power supply circuits
- Designed for through-hole mounting on printed circuit boards
Applications
- LED Driver circuits
- AC/DC Switching Mode Power Supplies (SMPS)
- Offline power conversion systems
Procurement Notes
Verify the manufacturer part number 7491181024 against official Wurth Elektronik documentation to ensure authenticity. Confirm that the received components match the specified WE-UNIT series characteristics, including the 4000Vrms isolation rating and 132kHz operating frequency. Check for physical integrity of the through-hole pins and housing before integration into production lines.
Selection Notes
Select this component when designing offline AC/DC converters requiring robust galvanic isolation. It is suitable for applications utilizing NCP101x or NCP105x controller chipsets. Ensure the design accommodates the through-hole footprint of 15.00mm x 11.00mm and the vertical height constraint of 16.80mm within the enclosure.
Part Context
This transformer belongs to the WE-UNIT series by Würth Elektronik, which specializes in power transformers for board-mounted applications. The series supports various AC/DC converter topologies, offering reliable performance in industrial and consumer electronics where high isolation voltages and compact form factors are required for efficient power management.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Consult Wurth Elektronik technical support for direct equivalents or cross-reference options based on specific electrical requirements.
