onsemi Single Bipolar Transistors BD681S

Bipolar (BJT) Transistor NPN - Darlington 100V 4A 40W Through Hole TO-126-3

Manufacturer: Fairchild/ON Semiconductor
Win Source Part Number: 049433-BD681S
Packaging: Tube/Rail
Mounting: Through Hole
Transistor Polarity: NPN - Darlington
Categories: Discrete Semiconductor Products
Status: Active
Temperature Range - Operating: 150°C (TJ)
Case / Package: TO-126-3
Maximum Current Collector: 4A
VCEO Maximum Collector-Emitter Breakdown Voltage: 100V
Max Vce (sat): 2.5V @ 30mA, 1.5A
Collector Cut-off Current(Max): 500μA
Typical Gain (hFE) (Min): 750 @ 1.5A, 3V
Maximum Power Dissipation: 40W
Popularity: Medium
Fake Threat In the Open Market: 60 pct.
Supply and Demand Status: Balance

TRANS NPN DARL 100V 4A TO126-3 Product overview: BD681S from Fairchild (onsemi) is a Bipolar Transistor for signal amplification, switching, driver stages, discrete power control, and general electronic circuit design. It is useful for engineers and buyers comparing datasheets, replacement parts, BOM lines, package options, lifecycle status, and procurement availability. Key searchable attributes include 100V, 4A. Search-friendly keywords include transistor, BJT, switching, amplification, 100V, 4A, Bipolar Transistor, Single Bipolar Transistors. This listing supports clearer product discovery for industrial, commercial, repair, automation, power, sensing, and embedded system projects. Product number 276-BD681S can be used for catalog matching and distributor lookup.