Overview
The BD437S is a medium power NPN epitaxial silicon transistor manufactured by Fairchild Semiconductor. This transistor is designed for linear and switching applications, offering a balance between power handling and switching speed. It is part of the BD433/435/437 series and is packaged in a TO-126-3 through-hole package. The BD437S is a versatile component suitable for a wide range of electronic circuits.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Collector-Base Voltage (VCBO) | 45 | V |
| Collector-Emitter Voltage (VCES) | 45 | V |
| Collector-Emitter Voltage (VCEO) | 45 | V |
| Emitter-Base Voltage (VEBO) | 5 | V |
| Collector Current (DC) (IC) | 4 | A |
| Collector Current (Pulse) (ICP) | 7 | A |
| Base Current (IB) | 1 | A |
| Collector Dissipation (PC) | 36 | W |
| Junction Temperature (TJ) | 150 | °C |
| Storage Temperature (TSTG) | -65 to 150 | °C |
| Current Gain Bandwidth Product (fT) | 3 | MHz |
Key Features
- Medium power linear and switching applications
- Complementary to BD434, BD436, and BD438 respectively
- High collector current capability up to 4A (DC) and 7A (pulse)
- High collector dissipation of 36W
- Low collector-emitter saturation voltage (VCE(sat)) of 0.2V to 0.6V
- DC current gain (hFE) ranging from 40 to 140
- Current gain bandwidth product (fT) of 3 MHz
Applications
The BD437S transistor is suitable for various applications including:
- Power amplifiers
- Switching circuits
- Motor control circuits
- Power supplies
- General-purpose linear and switching applications
Q & A
- What is the collector-base voltage (VCBO) of the BD437S transistor?
The collector-base voltage (VCBO) of the BD437S transistor is 45V. - What is the maximum collector current (IC) for the BD437S?
The maximum collector current (IC) for the BD437S is 4A (DC) and 7A (pulse). - What is the junction temperature (TJ) of the BD437S?
The junction temperature (TJ) of the BD437S is 150°C. - What is the storage temperature range for the BD437S?
The storage temperature range for the BD437S is -65°C to 150°C. - What is the current gain bandwidth product (fT) of the BD437S?
The current gain bandwidth product (fT) of the BD437S is 3 MHz. - What package type is the BD437S available in?
The BD437S is available in a TO-126-3 through-hole package. - Is the BD437S still in production?
No, the BD437S has been discontinued by Fairchild Semiconductor. - What are the complementary transistors to the BD437S?
The complementary transistors to the BD437S are BD434, BD436, and BD438. - What is the collector-emitter saturation voltage (VCE(sat)) of the BD437S?
The collector-emitter saturation voltage (VCE(sat)) of the BD437S ranges from 0.2V to 0.6V. - What are some typical applications of the BD437S transistor?
The BD437S transistor is typically used in power amplifiers, switching circuits, motor control circuits, power supplies, and general-purpose linear and switching applications.
