The MM3Z15VB is a precision Zener diode manufactured by Fairchild (now part of onsemi) that serves as a voltage regulation and reference component in discrete semiconductor applications. This single Zener diode operates with a nominal Zener voltage of 15V and maintains exceptional accuracy with a tight ±2% tolerance, making it ideal for applications requiring precise voltage regulation and circuit protection.
Designed in the compact SOD-323F (SC-90) surface mount package, this component addresses critical design challenges in modern electronics where space constraints and thermal management are paramount concerns. The ultra-small form factor enables high-density circuit designs while the surface mount configuration facilitates automated assembly processes and reduces manufacturing costs. The device operates reliably across an extended temperature range from -65°C to 150°C, ensuring consistent performance in harsh environmental conditions and diverse application scenarios.
The MM3Z15VB delivers a maximum power dissipation of 200mW (0.2W) while maintaining low reverse leakage current of just 45nA at 10.5V, which minimizes power consumption and enhances circuit efficiency. The forward voltage drop remains low at 1V maximum when conducting 10mA, and the device exhibits a maximum impedance of 28 Ohms at the Zener knee, providing stable voltage regulation characteristics. These specifications make it particularly suitable for low-power applications where precision and efficiency are critical.
Primary advantages include excellent voltage stability, minimal temperature coefficient, low noise characteristics, and fast response time for transient suppression. The tight tolerance specification reduces the need for additional calibration circuits, simplifying overall system design and reducing component count. The surface mount package offers superior thermal characteristics compared to through-hole alternatives and provides better high-frequency performance due to reduced parasitic inductance.
This Zener diode finds extensive application in voltage reference circuits, power supply regulation, overvoltage protection schemes, level shifting circuits, and precision measurement equipment. It's commonly used in automotive electronics, industrial control systems, telecommunications equipment, consumer electronics, and portable devices where 15V regulation or reference is required. The component is also valuable in battery charging circuits, sensor interface circuits, and analog-to-digital converter reference applications.
Equivalent and alternative models include the 1N5245B (through-hole equivalent), BZX84C15 (SOT-23 package), MMSZ5245B (SOD-123 package), and BZV55C15 (minimelf package). Other manufacturers offer comparable devices such as Vishay's VZMS15, Nexperia's BZX384-C15, Rohm's RZ15CB, and Diodes Incorporated's MMSZ15T1G. When selecting alternatives, designers should verify equivalent electrical characteristics, package compatibility, and temperature specifications to ensure proper circuit operation. The availability of multiple package options allows flexibility in PCB layout optimization while maintaining the same electrical performance characteristics across different form factors.
MM3Z15VB Key Technical Attributes
Voltage Zener: 15V
Power Max: 200mW
Tolerance: ±2%
MM3Z15VB Packing Size
The MM3Z15VB is provided in a compact SOD-323F (also referenced as SC-90, SOD-323F) surface-mount package made for high-density boards. Each unit is packed in bulk with a total quantity of 6400 pieces, optimized for industrial-scale application and efficient handling. The SOD-323F case is designed with precise pin configuration to support streamlined automated mounting, and ensures robust thermal dissipation within the defined power range.
MM3Z15VB Application
This Zener diode is ideal for voltage regulation, over-voltage protection, and reference voltage generation in low-power circuits. Its compact size and surface-mount configuration suit it perfectly for modern electronics, with typical uses in power management modules, communications hardware, consumer electronics, and instrumentation.
MM3Z15VB Features
The MM3Z15VB offers a nominal 15V Zener voltage with a tight tolerance of ±2%, guaranteeing stable performance across operating conditions. Each device is rated with a 0.2W (200mW) maximum power dissipation, making it appropriate for low-power applications. The diode has a forward voltage (Vf) of no more than 1V at a current of 10mA, and maintains reverse leakage current under 45nA at 10.5V, ensuring energy efficiency and minimal self-heating. It has a maximum Zener impedance of 28 Ohms, supporting stable voltage regulation. The surface mount configuration and the SOD-323F packaging facilitate high-speed automated assembly and save valuable PCB space. The component boasts a wide operating temperature range from -65°C to +150°C, accommodating harsh environments and high-reliability requirements in industrial and automotive settings.
MM3Z15VB Quality and Safety Features
Manufactured by Fairchild (onsemi), the MM3Z15VB Zener diode meets strict quality assurance standards and is engineered for long service life. Its wide operating temperature range and enhanced power handling help in maintaining circuit safety over fluctuating load and ambient conditions. Electrostatic and thermal stability are key design elements, providing consistent operation and protecting sensitive circuitry.
MM3Z15VB Compatibility
With its surface-mount SOD-323F package and standardized electrical parameters, the MM3Z15VB integrates seamlessly into a wide range of PCB layouts and electronic system designs. It is compatible with automated pick-and-place processes and can replace other industry-standard 15V Zener diodes with the same package size, supporting easy design upgrades and maintenance.
MM3Z15VB Datasheet PDF
Our website features the most comprehensive and up-to-date datasheet for the MM3Z15VB Zener diode. We highly recommend customers download the datasheet on the current page to access authoritative technical and application details, ensuring best practices in integration and usage.
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