Overview
The BC858B-7-F is a PNP small-signal transistor produced by Diodes Incorporated. It is part of the BC856A – BC858C series, which is known for its suitability in switching and audio frequency (AF) amplifier applications. This transistor is packaged in a SOT23 format, making it ideal for compact and efficient designs. The BC858B-7-F is fully RoHS compliant, halogen- and antimony-free, and qualified to JEDEC standards for high reliability, ensuring it meets stringent environmental and performance standards.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit | Test Condition |
|---|---|---|---|---|---|---|
| Collector-Base Breakdown Voltage | BVCBO | - | - | -30 | V | IC = -10µA |
| Collector-Emitter Breakdown Voltage | BVCEO | - | - | -30 | V | IC = -10mA |
| Emitter-Base Breakdown Voltage | BVEBO | - | - | -5 | V | IE = -1µA |
| Collector Cutoff Current | ICBO | - | - | -15 nA | - | VCB = -30V |
| Collector Emitter Cutoff Current | ICES | - | - | -15 nA | - | VCE = -30V |
| Emitter-Base Cutoff Current | IEBO | - | - | -100 nA | - | VEB = -5V |
| Small Signal Current Gain | hFE | 220 | 290 | 475 | - | IC = -2.0mA, VCE = -5V |
| Collector-Emitter Saturation Voltage | VCE(sat) | -75 | -250 | -650 | mV | IC = -10mA, IB = -0.5mA |
| Base-Emitter Turn-On Voltage | VBE(on) | -600 | -650 | -750 | mV | IC = -2mA, VCE = -5V |
| Base-Emitter Saturation Voltage | VBE(sat) | -700 | -850 | -1100 | mV | IC = -10mA, IB = -0.5mA |
| Transition Frequency | fT | 100 | 200 | - | MHz | VCE = -5V, IC = -10mA, f = 100MHz |
| Maximum Junction Temperature | TJ | - | - | 150 | °C | - |
| Maximum Collector Current | IC | - | - | -100 mA | - | - |
| Maximum Collector-Emitter Voltage | VCEO | - | - | -30 V | - | - |
Key Features
- Ideally suited for automatic insertion due to its SOT23 package.
- Complementary NPN types: BC846 – BC848.
- Totally lead-free and fully RoHS compliant.
- Halogen- and antimony-free, classified as a “Green” device.
- Qualified to JEDEC standards for high reliability.
- Suitable for switching and AF amplifier applications.
- Automotive-compliant versions available (e.g., BC858BQ).
- Molded plastic package with matte tin plated leads, solderable per MIL-STD-202, Method 208.
Applications
- Switching applications: The BC858B-7-F is suitable for various switching circuits due to its high current gain and low saturation voltage.
- Audio Frequency (AF) Amplifier Applications: It is used in audio amplifiers and other signal processing circuits where high fidelity and low noise are required.
- Automotive Applications: Automotive-qualified versions (e.g., BC858BQ) are available for use in automotive systems, including those requiring specific change control and high reliability.
- Industrial and Consumer Electronics: The transistor can be used in a wide range of industrial and consumer electronic devices where small signal amplification is necessary.
Q & A
- What is the package type of the BC858B-7-F transistor?
The BC858B-7-F transistor is packaged in a SOT23 format.
- Is the BC858B-7-F RoHS compliant?
Yes, the BC858B-7-F is fully RoHS compliant and lead-free.
- What are the complementary NPN types for the BC858B-7-F?
The complementary NPN types are BC846 – BC848.
- What is the maximum collector current for the BC858B-7-F?
The maximum collector current is -100 mA.
- What is the maximum collector-emitter voltage for the BC858B-7-F?
The maximum collector-emitter voltage is -30 V.
- Is the BC858B-7-F suitable for automotive applications?
Yes, automotive-qualified versions (e.g., BC858BQ) are available, and it is qualified to JEDEC standards for high reliability.
- What is the transition frequency of the BC858B-7-F?
The transition frequency is 100 to 200 MHz.
- What is the maximum junction temperature for the BC858B-7-F?
The maximum junction temperature is 150°C.
- Is the BC858B-7-F halogen- and antimony-free?
Yes, it is halogen- and antimony-free, classified as a “Green” device.
- What are the typical applications of the BC858B-7-F transistor?
The BC858B-7-F is typically used in switching and AF amplifier applications, as well as in automotive and industrial electronics.
