BD237 TO-126 Transistor – KSH 10 at HIMA TRONICS Mombasa – Top quality transistors. Best electronics in Kenya. Shop now for Arduino, ESP32, sensors and IoT devices.
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BD237 TO-126 Transistor

SKU: HMJ841 Category: Transistors
KSH 10.00
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Product Description

BD237 TO-126 Transistor (NPN)

= 2A NPN Medium Power Transistor for Audio and Switching Applications =

The BD237 is a mediumpower NPN bipolar junction transistor (BJT) housed in a TO126 (SOT-32) package . Designed for use in 5.0 to 10W audio amplifiers and drivers, it is the NPN complement to the PNP transistor BD238 .

Device Type: NPN Bipolar Junction Transistor (BJT)
Package: TO126 (SOT32)
Maximum Collector Current (IC): 2A
PNP Complement: BD238
Ensure correct pin identification: Pin 1 is the Emitter, Pin 2 is the Collector, and Pin 3 is the Base . 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
Collector-Emitter Voltage (VCEO)80VMaximum continuous voltage
Emitter-Base Voltage (VEBO)5V
Collector Current (IC)2AContinuous current rating
Power Dissipation (Ptot)25WAt case temperature of 25°C
Power Dissipation (Ptot)1.25WWithout heatsink at 25°C ambient
DC Current Gain (hFE)40 minAt IC = 150mA, VCE = 2V
Transition Frequency (fT)3 MHzTypical value
Operating/Storage Temperature-65°C to +150°C

= Key Features =

Complementary NPN Design - Designed as a complementary transistor to the BD238 (PNP)

High Current Capability 2A continuous collector current for mediumpower applications

Low Saturation Voltage - 0.6V maximum at IC = 1A ensures low conduction losses

Medium Power Dissipation - 25W with proper heatsinking

== Applications ==

  • 5.0 to 10W audio amplifiers
  • Driver stages in audio amplifiers
  • Medium power linear applications
  • Power switching circuits
  • General-purpose amplification
Reliable Performance - Designed for audio amplifiers and drivers
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 BD237 NPN Transistor (TO-126 Package)
For reliable operation, ensure adequate heatsinking when dissipating significant power (above 1.25W)
For a lower voltage variant, consider the BD235 (VCEO of 60V) or BD233 (VCEO of 45V)
SMD equivalents are available in SOT223 (BCP56) and SOT89 (BCX56) packages
For precise pin identification, the standard TO-126 configuration is Emitter (1), Collector (2), Base (3) .
The SOT32 package is considered the SMD equivalent of the TO126 and shares the same electrical characteristics.

Avoid exceeding the maximum voltage ratings the collector-emitter 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