Our products are widely used across multiple sectors, including transportation, telecommunications, computers, home appliances, toys, and other digital electronics. The company has introduced state-of-the-art, fully automated production lines and advanced testing equipment from Germany, Japan, Taiwan, and other regions, laying a solid foundation for manufacturing high‑quality products. Production is rigorously conducted in accordance with the ISO 9001 and IATF 16949 quality management systems, as well as the ISO 14000 environmental management system. Our products comply with the EU RoHS directive and have passed SGS quality certification, strengthening Jiaxun Electronics’ core competitiveness. A customer‑centric development process, a scientifically sound and efficient supply chain, and a steadfast commitment to environmental sustainability enable Jiaxun’s products to deliver differentiated competitive advantages that meet diverse customer needs.

A automotive‑grade bipolar transistor, formally known as a semiconductor bipolar transistor—also referred to as a bipolar junction transistor or simply a transistor—is a current‑controlled semiconductor device. Its primary function is to amplify weak signals into electrical signals with larger amplitudes, and it can also serve as a contactless switch. As one of the fundamental semiconductor components, the automotive‑grade bipolar transistor exhibits current amplification and constitutes a core element in electronic circuits. A transistor is fabricated by forming two closely spaced PN junctions on a single semiconductor substrate; these junctions divide the semiconductor into three regions: the central region serves as the base, while the two outer regions are the emitter and collector. Transistors come in two configurations: PNP and NPN.

What about the polarity of automotive‑grade diodes? It’s actually quite simple: on an automotive‑grade diode, the longer lead is the positive terminal, and the shorter lead is the negative. If the leads are the same length, the larger lead inside the diode is the cathode, and the smaller one is the anode. When using a multimeter, connect the red probe to the “+” terminal and the black probe to the “–” terminal. When testing an automotive‑grade diode, you won’t get a reading on the low‑resistance range; use the RX10K range instead. Touch the two probes to the diode’s terminals. If the resistance is low, the black probe is connected to the anode; if the resistance is high, the black probe is connected to the cathode. When an automotive‑grade diode is used in conjunction with TTL components, it’s generally necessary to place a 470 Ω current‑limiting resistor in series to prevent damage to the device.