Power Transistor BD238 PNP, 0.5A TO-126

Power Transistor BD238 PNP, 0.5A TO-126

Transistors

Reference: TRBD238

Part.No: BD238

€1.20

Last items in stock

Immediate Dispatch

The BD238 is a medium-power PNP Bipolar Junction Transistor (BJT) in a TO-126 package with integrated heatsink mounting. Designed for audio driver stages, motor control, and complementary push-pull amplifier circuits.

Add to cart

Subscribe To When In Stock

You have successfully subscribed to this product

Description
Product Details

BD238 Medium-Power PNP Transistor - Push-Pull Amplifier & Audio Driver

The BD238 is a medium-power PNP transistor that excels in audio amplification and motor control applications. Its TO-126 package includes a metal tab for convenient heatsink mounting, making it the natural choice for complementary push-pull driver stages paired with the NPN BD237.

Functions & Applications

Complementary NPN Partner: Perfectly matched with BD237 for push-pull output stages and balanced amplifier topologies.
TO-126 with Heatsink Tab: Integrated metal back with mounting hole simplifies thermal management and PCB integration.
Medium Power Rating: Handles up to 500mW power dissipation, suitable for audio preamps and motor driver circuits.
Reliable Audio Performance: Low distortion and stable gain characteristics ideal for analog signal processing.

Technical Specifications

Parameter	Value / Specification
Transistor Type	BJT (Bipolar Junction Transistor)
Polarity / Channel	PNP
Package / Case	TO-126
Collector-Emitter Voltage (Vceo)	−100V
Max Collector Current (Ic)	500mA
Power Dissipation (Pd)	500mW
Mounting Type	Through-Hole (THT) with heatsink tab

Frequently Asked Questions

Q: What is the complementary NPN transistor for the BD238?
A: The BD237 is the complementary NPN transistor. Together, BD237 and BD238 form a perfectly matched pair for push-pull audio amplifier output stages.

Q: Can I mount the BD238 directly to a grounded heatsink?
A: No. The metal tab (back plate) is electrically connected to the Collector terminal. Always use an insulating bush, mica sheet, or thermal pad to prevent a short circuit to ground.

Notes

The metal back (collector tab) is NOT electrically isolated from the die. Insulating hardware (mica or thermal pad + insulating bush) is mandatory when mounting to a grounded heatsink.

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: PNP
Transistor Case Style: TO-126

16 other products in the same category:

Transistor BC267 NPN, 45 V, 1A, 375mW, TO-18

Transistors

Transistor BC267 NPN, 1A TO-18

Reference:

TRBC267

The BC267 is an NPN Bipolar Junction Transistor (BJT) in a metal TO-18 package, rated for up to 1A collector current. Suitable for switching and small-signal amplification tasks that require higher current handling than typical small-signal transistors.

Last items in stock

Transistor BC169 NPN 20V TO-92

Transistors

Transistor BC169 NPN, 0.1A TO-92

Reference:

TRBC169

The BC169 is a low-noise NPN Bipolar Junction Transistor (BJT) in a TO-92 package, rated for 20V. Suited for small-signal amplification stages and general-purpose switching in audio and hobbyist circuits.

In Stock

Transistor BC143 silicon PNP

Transistors

Transistor BC143 PNP, 1A TO-39

Reference:

TRBC143

The BC143 is a PNP silicon planar epitaxial transistor in a metal TO-39 package, originally designed as a driver-stage transistor for high-power audio amplifiers.

In Stock

Dual-Gate MOSFET BF981 N-Channel SOT-103

Transistors

Dual-Gate MOSFET BF981 N-Channel SOT-103

Reference:

TRBF981

The BF981 is a high-performance N-Channel Dual-Gate MOSFET in a SOT-103 package, specifically engineered for ultra-low-noise preamplification in VHF and FM receiver applications. Its exceptional noise figure and dual-gate isolation make it the preferred choice for LNA (Low Noise Amplifier) designs where signal integrity is critical.

Last items in stock

Transistor BFR91 NPN, 5GHz TO-50

Transistors

Transistor BFR91 NPN, 5GHz TO-50

Reference:

TRBFR91

The BFR91 is a high-frequency NPN Bipolar Junction Transistor (BJT) in a TO-50 package, optimized for microwave and UHF applications. With a transition frequency exceeding 5 GHz, it is ideal for low-noise amplifiers (LNAs) in satellite reception, UHF receivers and broadband RF circuits.

In Stock

Dual-Gate MOSFET BF961 N-Channel TO-50

Transistors

Dual-Gate MOSFET BF961 N-Channel TO-50

Reference:

TRBF961

The BF961 is a Dual-Gate N-Channel MOSFET in a TO-50 package, designed for VHF/UHF RF applications. Gate 1 accepts the input signal while Gate 2 enables automatic gain control (AGC), making it ideal for radio amateur receivers and mixer circuits.

Last items in stock

Transistor BC303 PNP, 65V, 1A, 850mW, TO-39

Transistors

Transistor BC303 PNP, 1A TO-39

Reference:

TRBC303

The BC303 is a general-purpose PNP Bipolar Junction Transistor (BJT) in a metal TO-39 can. Rated for 65V and 1A, it suits medium-power switching and amplification stages needing better heat dissipation than a plastic TO-92 part.

In Stock

Transistor 2N1711

Transistors

Transistor 2N1711

Reference:

TR2N1711

In Stock

Transistor BD234 PNP, 45V, 2A, 25W, TO-126

Transistors

Power Transistor BD234 PNP, 2A TO-126

Reference:

TRBD234

The BD234 is a PNP power BJT transistor in a TO-126 package, rated for 45V and 2A. Suited for audio output stages, motor control and general-purpose power switching in DIY and repair projects.

Last items in stock

Transistor BC183 NPN bipolar 30V 0.1A 350/1W TO92

Transistors

Transistor BC183 NPN, 0.1A TO-92

Reference:

TRBC183

The BC183 is a general-purpose NPN Bipolar Junction Transistor (BJT) in a TO-92 package. Suitable for low-noise audio amplification and small-signal switching in classic and modern analog circuits.

In Stock

Power Transistor BF871 NPN, 300V TO-202

Transistors

Power Transistor BF871 NPN, 300V TO-202

Reference:

TRBF871

The BF871 is a high-voltage NPN power transistor in a TO-202 package with an integrated metal tab for heatsink mounting. Widely used in CRT display RGB amplification stages and video output circuits requiring robust voltage handling.

In Stock

Transistor BF251 NPN, 25mA TO-72

Transistors

Transistor BF251 NPN, 25mA TO-72

Reference:

TRBF251

The BF251 is a silicon NPN RF transistor in a TO-72 metal-can package, designed for intermediate frequency (IF) and RF amplification in AM/FM receivers, TV tuners and AGC stages.

Last items in stock

Transistor BC117

Transistors

Transistor BC117 NPN, 0.05A TO-106

Reference:

TRBC117

The BC117 is a small-signal NPN Bipolar Junction Transistor (BJT) in a TO-106 metal-can package. A legacy high-voltage member of the BC107 family, it is used for low-power amplification and switching stages requiring higher breakdown voltage.

In Stock

Transistor 2SD879 NPN Darlington, TO-92

Transistors

Transistor 2SD879 NPN Darlington, TO-92

Reference:

TR2SD879

The 2SD879 is a high-gain NPN Darlington transistor in a TO-92 package. Engineered for applications requiring massive current amplification, such as relay drivers, motor control, and high-impedance signal switching.

Last items in stock

Transistor BC148 NPN 20V 0.1A 0.3W 85MHz

Transistors

Transistor BC148 NPN 20V 0.1A 0.3W 85MHz

Reference:

TRBC148

Το BC148 είναι ένα NPN Bipolar Junction Transistor (BJT) γενικής χρήσης σε θήκη TO-92. Κλασικό τρανζίστορ μικρού σήματος, κατάλληλο για ενίσχυση σε ακουστικές συχνότητες και switching χαμηλής ισχύος.

In Stock

Transistor AF369 PNP, Germanium TO-72

Transistor AF369 PNP, Germanium TO-72 2

Transistors

Transistor AF369 PNP, Germanium TO-72

Reference:

TRAF369

The AF369 is a vintage PNP germanium transistor in a TO-72 package, purpose-built for VHF/UHF RF amplification, mixing and oscillation in professional radio and television receivers. The integrated shield can provides excellent electromagnetic isolation for demanding RF circuits.

Last items in stock

Product added to wishlist

Product added to compare.