Transistor 2SD261 NPN, 0.5A TO-92

Transistor 2SD261 NPN, 0.5A TO-92

Transistors

Reference: TR2SD261

Part.No: 2SD261

€1.00

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The 2SD261 is a general-purpose NPN Bipolar Junction Transistor (BJT) in a TO-92 package. Reliable for low- to medium-current switching and amplification in hobby electronics, hobby robotics, and educational projects.

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Description
Product Details

2SD261 NPN Transistor – Versatile Switching & Medium-Current Amplification

The 2SD261 is a robust NPN transistor designed for general-purpose switching and amplification tasks. With its ability to handle up to 500mA collector current and straightforward TO-92 package, it is an excellent choice for hobby circuits, relay drivers, and educational electronics projects.

Functions & Applications

Medium Current Rating: Handles up to 500mA, ideal for driving small relays, solenoids, and LED arrays.
Standard TO-92 Package: Through-hole design perfect for breadboarding and hand-soldering on universal PCBs.
Reliable Switching: Clean on/off performance for digital logic interfacing and power control circuits.
Cost-Effective: Affordable general-purpose BJT, excellent for learning and prototyping.

Technical Specifications

Parameter	Value / Specification
Transistor Type	BJT (Bipolar Junction Transistor)
Polarity / Channel	NPN
Package / Case	TO-92
Collector-Emitter Voltage (Vceo)	20V
Max Collector Current (Ic)	500mA
Mounting Type	Through-Hole (THT)

Frequently Asked Questions

Q: What is the maximum load the 2SD261 can drive?
A: With a 500mA collector current rating and 20V Vceo, it can safely drive small relays (coil resistance ≥40Ω at 12V), solenoids, and high-power LED arrays when properly biased. Always use a protection diode for inductive loads.

Q: Is the 2SD261 compatible with microcontroller logic levels (5V/3.3V)?
A: Yes. The 2SD261 can be driven directly from 5V logic outputs. For 3.3V systems, you may need a base resistor or a small pull-up to ensure reliable saturation, depending on your required collector current.

Note: Price refers to one (1) piece. The component is shipped in bulk without individual packaging.

Transistor Type: BJT (Bipolar Junction Transistor)
Transistor Polarity / Channel: NPN
Transistor Case Style: TO-92

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