2SC4672FRAT100Q is a substitute material for Jiangsu Changjing Changdian transistor. 2SC4672 is available in Taiwan (UTC)

Regarding the issue of 2SC4672 being a substitute material for 2SC4672 long crystal long transistor (UTC) in Taiwan, the following are some analysis and suggestions:

1、 Basic characteristics of 2SC4672FRAT100Q and 2SC4672
2SC4672FRAT100Q：

Manufacturer: Jiangsu Changjing (or Changdian, which may vary depending on packaging or production batch).
Encapsulation: FRAT100Q， This is a specific packaging form that may include specific pin arrangements and sizes.
Electrical parameters: Similar to standard 2SC4672, but specific values may vary depending on the manufacturer and packaging.
2SC4672 (Taiwan has UTC):

Manufacturer: Taiwan Youshun (UTC).
Packaging: It may vary depending on the production batch, but common packaging forms include SOT-89, etc.
Electrical parameters: Similar to standard 2SC4672, with similar voltage, current, and power processing capabilities.
2、 Alternative analysis
Electrical parameter matching:

The electrical parameters of the substitute material 2SC4672 (UTC) should be similar or better than the original device 2SC4672FRAT100Q to ensure performance and stability in the circuit.
Pay special attention to key parameters such as maximum collector current, collector emitter voltage, and power dissipation.
Encapsulation compatibility:

The packaging form of substitute materials should be as compatible as possible with the original device to reduce the complexity of circuit design and manufacturing.
If the packaging is incompatible, it may be necessary to redesign the circuit board or use an adapter.
Manufacturer reliability:

Choose alternative materials produced by manufacturers with good reputation and reliable quality.
As a well-known electronic component manufacturer in Taiwan, UTC's product quality and reliability are usually high.
3、 Alternative suggestions
Refer to the data manual:

Before selecting alternative materials, carefully review the data manuals of the original device and alternative materials to ensure that the electrical parameters and packaging form match.
Small batch testing:

Before officially adopting alternative materials, conduct small-scale testing to verify their performance and stability in circuits.
Consider cost-effectiveness:

When choosing alternative materials, consider cost-effectiveness comprehensively, including factors such as price, availability, and delivery time.
Communicate with suppliers:

Communicate with suppliers to obtain more information and support regarding alternative materials, including technical support, sample testing, etc.
In summary, 2SC4672 (Taiwan has Shun UTC) can be used as a substitute for 2SC4672FRAT100Q Jiangsu Changjing Changdian transistor, but careful analysis and testing are needed in terms of electrical parameter matching, packaging compatibility, manufacturer reliability, and other aspects. Meanwhile, maintaining communication with suppliers to obtain more support and information is also very important.