BD238 TO-126 Transistor – KSH 10 at HIMASTORES Mombasa – best electronics in Kenya
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BD238 TO-126 Transistor

SKU: HMJ842 Category: Transistors
KSH 10.00
In Stock

Product Description

BD238 TO-126 Transistor (PNP)

2A PNP Medium Power Transistor for Audio and Switching Applications

The BD238 is a mediumpower PNP bipolar junction transistor (BJT) housed in a TO126 (SOT32) plastic package[citation:1][citation:4]. It is designed as a complementary device to the NPN transistor BD237[citation:2]. This transistor is wellsuited for use in driver stages of audio amplifiers and general-purpose power switching applications[citation:10][citation:11].

Device Type: PNP Bipolar Junction Transistor (BJT)
Package: TO126 (SOT32)[citation:1]
Maximum Collector Current (IC): -2A[citation:1]
NPN Complement: BD237[citation:2]
Ensure correct pin identification: Pin 1 is the Emitter, Pin 2 is the Collector, and Pin 3 is the Base[citation:12]. The collector is electrically connected to the metal mounting tab.
Do not exceed the maximum ratings to prevent permanent damage.

Key Technical Specifications

ParameterValueNotes
:-:-:-
Collector-Base Voltage (VCBO)-100V[citation:1][citation:12]
Collector-Emitter Voltage (VCEO)-80VMaximum continuous voltage[citation:1][citation:4]
Emitter-Base Voltage (VEBO)-5V[citation:1][citation:12]
Collector Current (IC)-2AContinuous current rating[citation:1][citation:12]
Power Dissipation (Ptot)25WAt case temperature of 25°C[citation:1][citation:12]
DC Current Gain (hFE)40 minAt IC 150mA, VCE 2V[citation:12]
Transition Frequency (fT)3 MHzTypical value[citation:1][citation:10]
Operating Junction Temperature150°CMaximum[citation:1][citation:12]

= Key Features =

Complementary PNP Design - Designed as a complementary transistor to the BD237 (NPN)[citation:2]

High Voltage Capability - 80V VCEO and 100V VCBO for power applications[citation:1][citation:12]

High Current Capability 2A continuous collector current for mediumpower applications[citation:1]

Low Saturation Voltage 0.6V maximum at IC = 1A ensures low conduction losses[citation:12]

= Applications =

  • Driver stages in audio amplifiers[citation:6][citation:10]
  • General-purpose power switching circuits[citation:11]
  • Power regulators[citation:3]
  • Motor controllers[citation:3]
  • Switching power supplies[citation:3]
Reliable Performance - Designed for driver stages in audio amplifiers and power applications
Widely Available Standard TO126 package with well-documented specifications

√ Ready to use A standard and welldocumented power transistor

√ Medium power capability - Suitable for a wide range of applications

Package Includes

  1. 1x BD238 PNP Transistor (TO-126 Package)
For reliable operation, ensure adequate heatsinking when dissipating significant power
This device is available in hFE ranking variants. The BD238-16 is a common variant with a higher hFE range
For a lower voltage variant, consider the BD234 (VCEO of 45V) or BD236 (VCEO of 60V)[citation:12]
For precise pin identification, the standard TO-126 configuration is Emitter (1), Collector (2), Base (3)[citation:12].
This transistor is also available in a throughhole TO225 package, which shares the same electrical characteristics[citation:10].

Avoid exceeding the maximum voltage ratings the collectoremitter voltage (VCEO) of 80V is critical

-Avoid exceeding the maximum junction temperature of 150°C

-Avoid using this transistor as a direct replacement without confirming the pinout and specifications