Ween BT149 Thyristor 400V 200µA TO-92

The Ween BT149 Thyristor is a 400V planar passivated silicon controlled rectifier (SCR) housed in a compact SOT54 (TO-92) plastic package. Designed for efficient and reliable switching, it suits modern electronic designs where space and power efficiency are critical.

Overview

The BT149 features a sensitive gate that allows direct triggering from low-power drivers and logic ICs. This simplifies circuit design and can reduce the need for additional driver components. The planar passivated construction provides enhanced voltage ruggedness and long-term reliability, supporting stable performance in a range of demanding applications.

Key Features

• General Purpose Switching: Suited to a wide range of general-purpose switching and phase control applications.
• Low Power Circuit Compatibility: Designed for use in low-power circuits due to its low gate trigger requirements.
• Robust Construction: Planar passivated silicon design provides protection against voltage transients.
• Easy Integration: The standard TO-92 through-hole package supports straightforward PCB mounting.

Technical Specifications

• Peak Repetitive Off-State Voltage (Vdrm): 400V
• Max Gate Trigger Current (Igt): 200µA
• Average On-State Current (It(av)): 500mA
• On-State RMS Current (It(rms)): 800mA
• Max Holding Current (Ih): 5mA
• Max Gate Trigger Voltage (Vgt): 800mV
• Peak Non-Repetitive Surge Current (Itsm): 9A
• Maximum Operating Temperature: 125°C
• Package / Case Style: TO-92 (SOT54)
• Mounting Type: Through Hole
• Number of Pins: 3

Dimensions and Weight

• Width: 3.3
• Depth: 1.5
• Height: 4.3
• Weight: 0.5 g

The Ween BT149 Thyristor is a suitable choice for designs that require a compact, through-hole SCR with a sensitive gate and a 400V repetitive off-state voltage rating.