3.9V SOD-323 voltage regulator diode JSCJ BZT52C3V9S JC and LM3Z3V9T1G LRC

Analysis and Advantage Comparison of BZT52C3V9S and Leshan Radio 3.9V SOD-323 Zener Diode Models
Model confirmation and parameter analysis
BZT52C3V9S (SOD-323 package)
Manufacturer: Shenzhen Microelectronics (MDD)
Core parameters:
Voltage regulation value: 3.9V (nominal value), tolerance ± 5%
Package: SOD-323 (size 1.70 × 1.30mm)
Rated power: 200mW
Dynamic impedance (Zzt): 90 Ω (@ 5mA test current)
Reverse leakage current (Ir): 3 µ A (@ 1V)
Positive voltage drop (Vf): 0.9V (@ 5mA)
Working temperature range: -55 ℃~+150 ℃
Certification: RoHS compliant, lead-free process
Leshan Radio Corresponding Model: LM3Z3V9T1G (SOD-323 Package)
Manufacturer: Leshan Radio (LRC)
Core parameters:
Voltage regulation value: 3.9V (nominal value), tolerance ± 5%
Package: SOD-323 (size consistent with BZT52C3V9S)
Rated power: 200mW
Dynamic impedance (Zzt): not clearly labeled, but the data manual shows that the impedance parameters are consistent with BZT52C3V9S
Reverse leakage current (Ir): 3 µ A (@ 1V)
Positive voltage drop (Vf): 0.9V (@ 10mA)
Working temperature range: -65 ℃~+150 ℃
Certification: RoHS compliant, ESD protection level Class 3 (>16kV)
Comparative analysis of advantages
1. Electrical performance advantages
Voltage stabilization accuracy and dynamic response:
Both adopt a Zener diode structure, with a voltage stabilization value of 3.9V and a tolerance of ± 5%, suitable for scenarios with high voltage stability requirements. The dynamic impedance (Zzt=90 Ω) of BZT52C3V9S is slightly lower than that of Leshan products, which means that the voltage fluctuation is smaller and the voltage stabilization accuracy is higher when the load changes.
Leakage current control:
The reverse leakage current is 3 µ A @ 1V, which is at the forefront of the industry and effectively reduces static power consumption, making it suitable for battery powered equipment.
Temperature stability:
The working temperature range of Leshan products (-65 ℃~+150 ℃) is wider than BZT52C3V9S (-55 ℃~+150 ℃), especially in low-temperature environments, with better performance, suitable for extreme temperature scenarios such as automotive electronics and industrial control.
2. Packaging and reliability advantages
Compact design:
The SOD-323 package size (1.70 × 1.30mm) is a common advantage of both, suitable for high-density PCB layout, especially for space limited scenarios such as smartphones and wearable devices.
ESD protection capability:
The ESD rating of Leshan products reaches Class 3 (>16kV), and their anti-static ability is significantly better than BZT52C3V9S (ESD rating not clearly marked). They are less likely to be damaged by static electricity during production and transportation.
Certification and Compliance:
Both comply with RoHS standards, but Leshan products emphasize lead-free processes and meet stricter environmental requirements for overseas market access.
3. Cost and supply chain advantages
Price competitiveness:
The unit price of BZT52C3V9S is about 0.06 yuan (for large-scale procurement), and the price of Leshan products is about 0.12 yuan. The former has more advantages in cost sensitive applications such as consumer electronics.
Localization support:
As a domestic manufacturer, Leshan Radio provides faster lead time response (usually 3-5 days) and technical support, making it suitable for projects that require rapid iteration or small-scale trial production.
Brand reputation:
Leshan Radio has been deeply involved in the domestic semiconductor industry for many years, and its product consistency and long-term reliability reputation are superior to some emerging manufacturers, reducing selection risks.
4. Applicability to application scenarios
Applicable scenarios for BZT52C3V9S:
Consumer electronics (such as chargers, power adapters)
Mobile devices (such as Bluetooth modules, sensors)
Cost priority industrial control
LM3Z3V9T1G Applicable scenarios:
Automotive electronics (such as onboard ECU, BMS system)
Outdoor equipment (such as security monitoring, industrial sensors)
Communication equipment requiring high ESD protection
conclusion
BZT52C3V9S and Leshan Radio LM3Z3V9T1G have highly consistent core parameters and can both meet the 3.9V voltage stabilization requirements. When selecting, specific application scenarios should be considered:
Pursuing ultimate cost and compact design: BZT52C3V9S is the preferred choice, as its price advantage and voltage stabilization accuracy are more suitable for the consumer electronics field.
Need for wide temperature operation, high ESD protection, or localized support: The LM3Z3V9T1G product from Leshan has become a better solution in fields such as automotive electronics and industrial control due to its wider temperature range and advantages in domestic manufacturer services.
Both reflect the technological progress of domestic semiconductor manufacturers in the field of voltage regulators, providing engineers with cost-effective selection solutions.