Overview
The BDX34B is a PNP epitaxial silicon Darlington transistor manufactured by Fairchild Semiconductor, now part of ON Semiconductor. This device is designed for high-gain general-purpose and low-speed switching applications. It is part of the BDX34 series, which includes the BDX34, BDX34A, BDX34B, and BDX34C, each with varying voltage ratings. The BDX34B is known for its high DC current gain and is often used in power linear and switching applications.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Collector-Base Voltage (VCBO) | -80 | V |
| Collector-Emitter Voltage (VCEO) | -80 | V |
| Collector Current (DC) (IC) | -10 | A |
| Collector Current (Pulse) (ICP) | -15 | A |
| Base Current (IB) | -0.25 | A |
| Collector Dissipation (PC) | 70 | W |
| Junction Temperature (TJ) | 150 | °C |
| Storage Temperature (TSTG) | -65 to 150 | °C |
| DC Current Gain (hFE) | 750 (typ.) at VCE = -3V, IC = -3A | |
| Collector-Emitter Saturation Voltage (VCE(sat)) | -2.5V at IC = -3A, IB = -6mA | |
| Base-Emitter ON Voltage (VBE(on)) | -2.5V at VCE = -3V, IC = -3A |
Key Features
- High DC current gain (hFE) of 750 (typ.) at VCE = -3V, IC = -3A
- High collector-emitter sustaining voltage (VCEO(sus)) of up to -80V
- Low collector-emitter saturation voltage (VCE(sat)) of -2.5V at IC = -3A, IB = -6mA
- Monolithic construction with built-in base-emitter shunt resistors
- Pb-free and RoHS compliant
- TO-220 package
Applications
- Power linear applications
- Low-speed switching applications
- General-purpose high-gain applications
- Complementary to BDX33/33A/33B/33C NPN transistors
Q & A
- What is the collector-emitter voltage rating of the BDX34B?
The collector-emitter voltage rating of the BDX34B is -80V.
- What is the maximum collector current for the BDX34B?
The maximum collector current for the BDX34B is -10A (DC) and -15A (pulse).
- What is the typical DC current gain of the BDX34B?
The typical DC current gain (hFE) of the BDX34B is 750 at VCE = -3V, IC = -3A.
- What is the collector-emitter saturation voltage of the BDX34B?
The collector-emitter saturation voltage (VCE(sat)) of the BDX34B is -2.5V at IC = -3A, IB = -6mA.
- Is the BDX34B Pb-free and RoHS compliant?
- What package type does the BDX34B come in?
The BDX34B comes in a TO-220 package.
- What are the typical applications of the BDX34B?
The BDX34B is typically used in power linear and low-speed switching applications, as well as general-purpose high-gain applications.
- What is the maximum junction temperature for the BDX34B?
The maximum junction temperature for the BDX34B is 150°C.
- What is the storage temperature range for the BDX34B?
The storage temperature range for the BDX34B is -65 to 150°C.
- Is the BDX34B still in production?
No, the BDX34B has been discontinued by Fairchild Semiconductor.
