BC848C NPN Silicon Epitaxial Planar Transistor: 50V Withstand Voltage, 0.2A, SOT‑23 General‑Purpose Signal Switching and Audio Amplification Transistor

BC848C is an NPN silicon epitaxial planar transistor within the BC846-BC848 family, packaged in SOT-23 surface-mount form. Its complementary PNP counterparts are BC856-BC858 series devices. This component is mainly applied to switching circuits and audio amplification scenarios. It features proper breakdown voltage and DC current gain, and serves as a commonly-used small-signal surface-mount transistor on circuit boards. This document organizes its core parameters, product features, application scope and relevant suggestions for engineering implementation.

1. Core Product Parameters

Absolute Maximum Ratings (Ta = 25℃)

1. Collector-Base Voltage: 50V
2. Collector-Emitter Breakdown Voltage: 45V
3. Emitter-Base Breakdown Voltage: 5V
4. Operating and storage temperature range: -65℃ to +150℃

Electrical Characteristics (Ta = 25℃)

1. DC current gain: minimum 110, maximum 800
2. Package type: SOT-23 surface-mount package
3. Pin definition: Pin 1 for Base, Pin 2 for Emitter, Pin 3 for Collector
4. Complementary device: PNP transistors of BC856~BC858 series

2. Key Product Features

1. It is an NPN surface-mount transistor manufactured with silicon epitaxial planar process. The compact SOT-23 package occupies small PCB area and fits high-density circuit board layout.
2. It provides a wide range of DC current gain. It can work for small-signal amplification as well as general-purpose switching operations.
3. Corresponding complementary PNP devices (BC856 to BC858 series) are available for circuits requiring NPN-PNP pairing such as push-pull topologies.
4. It supports wide temperature range for storage and operation from -65℃ to 150℃, delivering good environmental adaptability.
5. Standard recommended SOT-23 soldering pad dimensions are provided for PCB layout, compatible with conventional surface-mount soldering processes in mass production.

3. Main Application Fields

1. Audio-frequency signal amplification circuits in various equipment.
2. General-purpose small-signal logic switching control circuits.
3. Signal-processing circuits requiring NPN-PNP device pairing.
4. Small-signal processing units in consumer electronics and industrial control boards.

4. Suggestions for Engineering Design

1. The reference testing condition is 25℃ ambient temperature. Designers shall take parameter drift caused by temperature rise into account in practical projects. Avoid continuous operation close to absolute maximum voltage ratings and reserve sufficient safety margin.
2. Adopt the recommended standard SOT-23 pad dimensions given in datasheet for PCB layout to guarantee soldering yield. Double-check pin assignment to prevent mis-connection of base, emitter and collector terminals.
3. When designing audio amplification circuits, refer to static characteristic and current-gain bandwidth curves from the datasheet. Evaluate actual amplification performance according to practical collector operating current.
4. For complementary push-pull circuit design, select BC856-BC858 series PNP transistors as matching components.
5. Keep storage temperature within the range of -65℃ to 150℃. Control soldering temperature and duration to avoid thermal damage to the device.

5. Product Summary

BC848C is a general-purpose NPN small-signal transistor in SOT-23 package, supporting both signal amplification and switching functions. It has sufficient withstand voltage, matched complementary PNP devices and favorable temperature resistance. This mature and widely-used surface-mount transistor is suitable for audio amplification and small-signal switching applications in consumer electronics and industrial control hardware. Stable circuit performance can be achieved by reserving voltage safety margin, verifying PCB pads and pin connections, and conducting circuit tuning with reference to device characteristic curves.

About Slkor：

Slkor has research and development offices in Busan, South Korea, Beijing, China, and Suzhou, China. Most of the wafer manufacturing and packaging and testing are carried out within China. The company employs and collaborates with individuals and organizations worldwide, with a laboratory for product performance and reliability testing and a central warehouse located at its headquarters in Shenzhen. Slkor has filed for over a hundred invention patents, offers more than 2,000 product models, and serves over ten thousand customers globally. Its products are exported to countries and regions including Europe, the Americas, Southeast Asia, and the Middle East, making it one of the rapidly growing semiconductor companies in recent years. With well-established management systems and streamlined workflows, Slkor has rapidly enhanced the brand awareness and reputation of its "SLKOR" brand through its outstanding quality and standardized services. Its product range includes three major series: diodes, transistors, and power devices, with recent introductions of new products such as Hall elements and analog devices, expanding its presence in sensors, Risc-v microcontrollers, and other product categories.

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