BS250FTA – ZETEX

Overview

The Diodes Incorporated BS250FTA is a P-channel MOSFET designed for low-power switching applications, offering a 45V drain-source voltage and a continuous drain current capability of 90mA at 25°C. Its primary function is to act as a voltage-controlled switch, ideal for signal gating and low-current load control. A critical design consideration when utilizing this device is its relatively high on-resistance (Rds(on) of 14Ω at 200mA, 10V), which necessitates careful thermal management to prevent excessive power dissipation, especially in applications with higher duty cycles or ambient temperatures exceeding 25°C, as its 330mW power rating is a significant limiting factor.

Key Features

• P-Channel MOSFET Technology
• 45V Drain-to-Source Voltage (Vdss)
• 90mA Continuous Drain Current (Id @ 25°C)
• 14Ω Maximum On-Resistance (Rds(on) @ 200mA, 10V)
• 330mW Maximum Power Dissipation (Ta)
• SOT-23-3 Surface Mount Package (2.92mm x 2.60mm)

Applications

The component is engineered for deployment in systems requiring high reliability and performance under specific operating conditions. It provides functional stability across the stated design envelope.

• Low-side switching for battery-powered portable devices
• Signal gating in low-frequency analog circuits
• Load control for small indicator LEDs or sensors
• Power sequencing for simple digital logic interfaces