Power Transistor BD441 NPN, 10A TO-126

Power Transistor BD441 NPN, 10A TO-126

Transistors

Reference: TRBD441

Part.No: BD441

€1.40

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The BD441 is a medium-power NPN Bipolar Junction Transistor (BJT) in a TO-126 package. Engineered for robust switching and audio driver applications requiring higher voltage tolerance and efficient heat dissipation.

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Description
Product Details

BD441 Power Transistor – High-Voltage Switching & Audio Driver

The BD441 is a medium-power NPN transistor designed for demanding switching and audio amplifier circuits. With its superior voltage tolerance (Vceo) compared to lower models in the 43x series, the BD441 excels in high-voltage driver applications while maintaining reliable current-handling capability and compact thermal performance in the TO-126 package.

Functions & Applications

High Voltage Tolerance (Vceo): Designed to handle higher collector-emitter voltages than BD433/435/437, offering safety margin in demanding circuits.
TO-126 Package: Metal tab design with efficient thermal path, ideal for moderate-power switching without excessive heatsinking.
Medium Current Capacity: Rated for up to 10A collector current, suitable for relay drivers, lamp switching, and audio output stages.
Proven Audio Grade: Reliable performance in audio amplifier and driver circuits with stable gain characteristics.

Technical Specifications

Parameter	Value / Specification
Transistor Type	BJT (Bipolar Junction Transistor)
Polarity / Channel	NPN
Package / Case	TO-126
Collector-Emitter Voltage (Vceo)	80V
Max Collector Current (Ic)	10A
Power Dissipation (Pd)	40W
Mounting Type	Through-Hole (THT) with metal tab

Frequently Asked Questions

Q: How does the BD441 differ from BD433, BD435, and BD437?
A: The primary difference is the maximum Collector-Emitter voltage (Vceo). The BD441 has a higher voltage rating (80V) compared to lower models in the 43x series, making it safer for circuits operating at higher voltages.

Q: Can the BD441 drive a 24V relay coil?
A: Yes, the BD441 can easily drive a 24V relay with coil current up to 10A, provided you include a protection diode (1N4007 or similar) in parallel with the relay coil to suppress inductive spikes.

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-126

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