on November 12th 73

Complete Overview of 2SC945 NPN Transistor

The UTC 2SC945 transistor is a versatile component widely utilized in electronic circuits, especially for audio amplification and high-frequency oscillator applications. This article explores its technical attributes and actual applications, showing why it’s a favored choice. Known for its ability to enhance weak audio signals with minimal noise and maintain stability in oscillator circuits, the 2SC945 enables the creation of high-quality sound and reliable frequency modulation. We’ll discuss its pin configuration, complementary components, CAD details, and practical uses, providing insights that help you leverage this transistor effectively across diverse projects.

Catalog

Exploration of 2SC945

The versatile UTC 2SC945 operates as an NPN transistor and is frequently utilized in the world of audio amplification and high-frequency oscillator applications. Within these domains, it plays a remarkable role in the electronics industry.

In the world of audio amplification, the 2SC945 excels at magnifying weak electrical signals into more powerful ones, which are then used to drive speakers. This enhancement is observed in a wide array of audio devices, ranging from smartphones to sophisticated home theater systems, where the clarity and fidelity of sound hold great significance. The transistor's remarkable gain characteristics empower it to intensify signals without causing considerable distortion, an aspect that is treasured in the development of consumer electronics, from everyday gadgets to premium audio systems.

The application of the 2SC945 is mostly notable in cases where audio signals of lower intensity need to be amplified to discernible levels. You can often integrate this transistor into devices that prioritize accurate sound reproduction, leveraging its stable frequency response and noise mitigation capabilities. Broad experiences have demonstrated that the transistor's reliable performance across various conditions frequently leads to its favored status in the audio engineering community.

Pin Configuration

CAD Model

Symbol

Footprint

3D Representation

Characteristics

Feature	Description
Collector-Emitter Voltage	BVCBO = 50V
Collector Current	Up to 150mA
hFE Linearity	High hFE linearity
Complementary Part	UTC 2SA733

Complementary Transistor

• 2SA733

Alternatives

Part Number	Description	Manufacturer
2SC2856 TRANSISTORS	Small Signal Bipolar Transistor, 0.1A I(C), NPN, TO-92	Hitachi Ltd
MPSA56/D26Z{OPTION18}TRANSISTORS	500mA, 80V, PNP, Si, SMALL SIGNAL TRANSISTOR, TO-92	Texas Instruments
KSC2310-O TRANSISTORS	Small Signal Bipolar Transistor, 0.05A I(C), 150V V(BR)CEO, 1-Element, NPN, Silicon, TO-92, TO-92L, 3 PIN	Samsung Semiconductor
BC368-16 TRANSISTORS	TRANSISTOR 1000 mA, 20 V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-92, BIP General Purpose Small Signal	NXP Semiconductors
BSS38 TRANSISTORS	TRANSISTOR 100 mA, 100 V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-92, BIP General Purpose Small Signal	NXP Semiconductors
ZTX455Q TRANSISTORS	Small Signal Bipolar Transistor, 1A I(C), 140V V(BR)CEO, 1-Element, NPN, Silicon, PLASTIC, TO-92 COMPATIBLE, E-LINE PACKAGE-3	Zetex / Diodes Inc
JC557A TRANSISTORS	TRANSISTOR 100 mA, 45 V, PNP, Si, SMALL SIGNAL TRANSISTOR, TO-92, BIP General Purpose Small Signal	NXP Semiconductors
BC546BRL1 TRANSISTORS	NPN Bipolar Transistor, TO-92 (TO-226) 5.33mm Body Height, 2000-REEL	onsemi
ZTX450 TRANSISTORS	Small Signal Bipolar Transistor, 1A I(C), 45V V(BR)CEO, 1-Element, NPN, Silicon, E-LINE PACKAGE-3	Diodes Incorporated
BC546B-AMMO TRANSISTORS	TRANSISTOR 100 mA, 65 V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-92, BIP General Purpose Small Signal	NXP Semiconductors

Technical Details

This table organizes the specifications, attributes, and parameters for the Micro Commercial Co 2SC945-Y-AP.

Type	Parameter
Mounting Type	Through Hole
Package / Case	TO-226-3, TO-92-3 (TO-226AA) (Formed Leads)
Surface Mount	NO
Transistor Element Material	SILICON
Current - Collector (Ic) (Max)	150mA
Number of Elements	1
Operating Temperature	-55°C ~ 150°C TJ
Packaging	Tape & Box (TB)
JESD-609 Code	e3
Pbfree Code	Yes
Part Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Number of Terminations	3
ECCN Code	EAR99
Terminal Finish	Matte Tin (Sn)
Terminal Position	BOTTOM
Terminal Form	WIRE
Peak Reflow Temperature (°C)	Not Specified
Reach Compliance Code	Compliant
Time@Peak Reflow Temperature-Max (s)	Not Specified
Pin Count	3
JESD-30 Code	O-PBCY-W3
Qualification Status	Not Qualified
Configuration	SINGLE
Power - Max	400mW
Polarity/Channel Type	NPN
Transistor Type	NPN
DC Current Gain (hFE) (Min) @ Ic, Vce	120 @ 1mA, 6V
Current - Collector Cutoff (Max)	100nA
Vce Saturation (Max) @ Ib, Ic	300mV @ 10mA, 100mA
Voltage - Collector Emitter Breakdown (Max)	50V
Transition Frequency	150MHz
Frequency - Transition	150MHz
RoHS Status	RoHS Compliant

Applications

Low Current Switch Arrays

The 2SC945 transistor finds frequent use in low-current switch arrays, adeptly managing small power loads. These arrays are basic to many electronic circuits, allowing for smooth control transitions with minimal power use. You can often refine these arrays to improve energy efficiency, inspired by diverse integrated systems aiming to maintain low power consumption as a serious aspect of their design.

Pre-Amplifier Setups

Within pre-amplifier setups, the 2SC945 transistor plays a key role by bolstering weak audio signals before further amplification. This application is dangerous for audio equipment where maintaining signal integrity is a must. You can finely tune the gain parameters, capturing and maintaining even the subtlest distinctions through the amplification process. The collective expertise in adjusting these setups has progressively elevated the audio quality available in contemporary devices.

H-Bridge Configurations for Small Motors

The 2SC945 is also ideal for H-bridge configurations used in controlling small DC motors, providing efficient bidirectional control required for robotics and automation. You can emphasize the reliability and responsiveness of these configurations, using broad developmental insights to enhance motor control precision. As technology advances, these motors become seamlessly integrated into complex systems, demonstrating versatile operation under diverse conditions.

Audio Circuits

In the domain of audio circuits, the 2SC945 is useful for achieving high-quality sound reproduction. As a key component in various amplifier stages, it consistently aims for clarity and fidelity of audio signals. You can utilize your expertise to arrange sophisticated circuit configurations, ensuring optimal transistor performance to minimize distortion and maintain audio richness.

Oscillator Circuits

Oscillator circuits represent another substantial application for the 2SC945, where it is dynamic in generating periodic waveforms. These circuits serve dangerous roles in numerous timing applications, including clocks and signal generators. You can carefully adjust these circuits to deliver precise frequency outputs, leveraging an extensive understanding of phase noise reduction and stability improvement. These precisely calibrated circuits form the foundation of technologies dependent on exact timing and synchronization.

Package

Manufacturer Insights

Micro Commercial Co, renowned for its excellence in high-quality product manufacturing and distribution, holds a formidable position on the global stage. The company artfully balances its locations and functions. Its headquarters in Simi Valley, California, harmonizes with its influential base in Suzhou, China, key for technical support and engineering prowess. This dual arrangement not only enhances cross-geographical operations but also bolsters strategic adaptability to meet the ever-changing demands of the global marketplace. In addition, by managing logistics and warehouses in both California and Suzhou, the company aligns its supply chain management with prevailing industry standards, ensuring a well-oiled operation.

Strategically situating manufacturing sites highlights the company's dedication to operational efficiency and outstanding customer service. With its presence in vibrant areas like Taipei and core manufacturing hubs in Yangzhou, China, Micro Commercial Co gains a strategic edge. These locations facilitate streamlined production and swift distribution to prime markets, useful for thriving in a globally connected arena.

Datasheet PDF

ZTX450 Datasheets:

ZTX450-51.pdf