BC337 General Purpose NPN Transistor – KSH 5 at HIMASTORES Mombasa – best electronics in Kenya
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BC337 General Purpose NPN Transistor

SKU: HMJ150 Category: Transistors
KSH 5.00
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Product Description

BC337 General Purpose NPN Transistor

45V 800mA NPN Transistor for Switching and Amplification

The BC337 is a widely used generalpurpose NPN bipolar junction transistor. It is wellsuited for low-power switching and amplification, commonly used in driver and output stages of audio amplifiers [citation:2][citation:5].

High Current Capability - Up to 800mA continuous collector current [citation:1].
Low Voltage Operation 45V collectoremitter voltage [citation:1].
Collector-Emitter Voltage (VCEO): 45V.
Continuous Collector Current (IC): 800mA [citation:1][citation:6][citation:8].
The PNP complementary part is the BC327 transistor [citation:10][citation:8].

Technical Specifications

ParameterValue
PolarityNPN [citation:1]
Collector-Emitter Voltage45V [citation:4]
Collector-Base Voltage50V [citation:4]
Emitter-Base Voltage5V [citation:4]
Continuous Collector Current800mA [citation:4]
Power Dissipation625mW [citation:2][citation:4]
Transition Frequency100MHz to 210MHz [citation:1][citation:7]
PackageTO-92 [citation:1][citation:2]

= hFE Classification Ranks =

The BC337 comes in different gain ranks. Typical hFE values at 100mA, 1V:

RankhFE Range
BC337100-630 [citation:4]
BC337-16100-250 [citation:4][citation:14]
BC337-25160-400 [citation:4]
BC337-40250-630 [citation:4]

> Check part number suffix for the specific gain rank.

Choose rank based on circuit gain requirements.

Pin Configuration

TO-92 package (flat side facing you, leads down):

  • Pin 1: Collector
  • Pin 2: Base
  • Pin 3: Emitter [citation:11]

Key Features

+High Current Gain - hFE up to 630 for strong amplification [citation:4].

+Good Frequency Response - 100MHz minimum transition frequency [citation:6].

+Low Saturation Voltage - 0.7V max at 500mA [citation:4].

+Widely Available TO92 through-hole package for easy breadboarding [citation:2][citation:14].

= Applications =

  1. Audio preamplifiers and low-power amplifier stages [citation:2].
  2. Driver and output stages of audio amplifiers [citation:10].
  3. General-purpose switching circuits [citation:5].
  4. Sensor signal conditioning.
  5. Home appliances and audio systems [citation:8].
Reliable and Versatile - A proven standard component for electronics work.
ThroughHole Package TO-92 fits standard breadboards and PCBs.

√ Suitable for 3.3V and 5V logic circuits.

√ Complementary PNP pair is BC327.

√ Available from multiple manufacturers.

Troubleshooting

Transistor not switching:

  • Verify base-emitter voltage is above 0.7V.
  • Check base current and resistor values.
  • Ensure load current does not exceed 800mA.

Excessive heat:

  • Verify collector current within 800mA limit.
  • Ensure power dissipation does not exceed 625mW.
  • Check for correct biasing.