7491182024

$6.51

Description：XFMR LED DR AC/DC CONV 900UH TH
Series：WE-UNIT
Mfr：Würth Elektronik
Package：Tray

SKU:d41db08bb994 Category: Switching Converter, SMPS Transformers Brand: Würth Elektronik

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Product introduction

Product Detailed Parameters

Description：XFMR LED DR AC/DC CONV 900UH 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：900µH @ 10kHz
Frequency：132kHz
Operating Temperature：-40°C ~ 125°C
Mounting Type：Through Hole
Size / Dimension：0.709" L x 0.650" W (18.00mm x 16.50mm)
Height - Seated (Max)：0.709" (18.00mm)
Footprint：0.709" L x 0.650" W (18.00mm x 16.50mm)
Style：-
Grade：-
Qualification：-

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7491182024

Overview

The Würth Elektronik 7491182024 is an off-line pulse transformer designed for AC/DC switching mode power supplies. It features a primary inductance of 0.9 mH and a turns ratio of 4.4:1, with a maximum primary resistance of 4.3 Ω. The component supports a nominal input voltage range of 125-375 VDC and provides 4000 Vrms isolation with a minimum clearance and creepage distance of 6 mm. Rated for through-hole mounting, it operates within a temperature range of -40 °C to +125 °C and is intended for use with specific controller chipsets.

Feature Summary

Provides high-voltage isolation between primary and secondary circuits for safety compliance
Engineered specifically for off-line applications in LED drivers and AC/DC converters
Supports wide operating temperature ranges suitable for industrial environments

Applications

LED Drivers
AC/DC Switching Mode Power Supplies (SMPS)

Procurement Notes

Verify the specific datasheet version to confirm compatibility with target controller ICs such as NCP101x or NCP105x series. Ensure that the PCB layout accommodates the required 6 mm minimum clearance and creepage distances for adequate isolation performance. Confirm that the thermal management design supports operation up to 125 °C ambient conditions.

Selection Notes

Select this component when designing isolated AC/DC converters requiring 4000 Vrms isolation and a 4.4:1 turns ratio. It is suitable for systems utilizing On Semiconductor NCP101x or NCP105x controllers. Consider the 0.9 mH primary inductance and 4.3 Ω resistance values for circuit simulation and efficiency calculations.

Part Context

This part belongs to the Würth Elektronik WE-UNIT Offline series, which offers board-mount transformers for offline applications. These components are designed to facilitate efficient power conversion in compact form factors while maintaining strict isolation standards required for mains-connected electronics.