BZX84C39Q-13-F

Overview
The Diodes Inc. BZX84C39Q-13-F is a part of the BZX84 series of Zener diodes, designed for use in voltage regulation applications. It is specifically engineered to maintain a stable voltage across its terminals, making it suitable for protecting sensitive components and providing a precise reference voltage in circuits. The BZX84C39Q-13-F is widely used in power supplies, voltage clamping, and other scenarios where voltage regulation is essential.

Key Features

* Zener Diode Functionality: Provides precise voltage regulation and transient voltage protection
* Low Reverse Leakage Current: Ensures minimal current leakage in the reverse bias region, improving efficiency and reducing power consumption
* Small Package Size: Available in a small surface-mount package, making it ideal for space-constrained applications
* Reliable and Robust: Offers long-term stability, ensuring reliable performance in various environmental conditions
* High Breakdown Voltage: Provides robust protection for circuits by regulating voltage up to a high value, preventing over-voltage damage to other components

Specifications

* Zener Voltage (Vz): 39 V at 5 mA
* Nominal Zener Impedance (Zz): 30 Ω at 5 mA
* Maximum Zener Impedance (Zz max): 50 Ω at 1 mA
* Reverse Current (Ir): 0.25 µA at Vz = 39 V
* Peak Reverse Voltage (Vrrm): 39 V
* Maximum Power Dissipation (Pd): 500 mW
* Forward Voltage (Vf): Typically 1.0 V at If = 10 mA
* Operating Temperature Range: -65°C to +150°C, ensuring it can operate in a wide range of environmental conditions
* Package Type: SOD-123, a compact surface-mount package that allows for efficient use of PCB space
* Polarity: Standard polarity for Zener diodes, where the cathode is marked with a band
* Regulation Current: The Zener diode operates efficiently at 5 mA, with a maximum working current of up to 20 mA
* Storage Temperature: -65°C to +150°C, ensuring reliability under harsh storage conditions

Applications

* Voltage Regulation: The BZX84C39Q-13-F is often used in low-power voltage regulation circuits, ensuring that the voltage remains stable at the required level despite fluctuations in the input voltage.
* Power Supply Protection: Protects sensitive components by clamping high voltage spikes that might otherwise cause damage to downstream circuits.
* Signal Clamping: The diode can be used to clamp voltage to a specific level, preventing over-voltage conditions in signal paths.
* Transient Voltage Suppression: This Zener diode is ideal for applications where protection against short-duration voltage spikes is required, providing transient voltage suppression to safeguard other components.
* Reference Voltage Source: The diode can be used as a reference voltage in low-voltage applications where precision is essential.

Electrical Characteristics

* Zener Voltage: The breakdown voltage is highly stable and accurate, with a nominal value of 39 V at a test current of 5 mA, making it suitable for precision voltage regulation.
* Reverse Leakage Current (Ir): The BZX84C39Q-13-F exhibits low reverse leakage current, typically 0.25 µA at 39 V, which is critical for minimizing power loss in low-power applications.
* Forward Voltage (Vf): At a forward current of 10 mA, the forward voltage is approximately 1.0 V, which is common for Zener diodes in small signal applications.
* Temperature Stability: The Zener voltage of the diode remains stable over the full operating temperature range of -65°C to +150°C, ensuring reliable performance in extreme environmental conditions.

Thermal and Power Considerations

* Thermal Resistance (Junction to Ambient): The diode has a relatively low thermal resistance, ensuring effective heat dissipation during operation.
* Power Dissipation: With a maximum power dissipation of 500 mW, the BZX84C39Q-13-F is suitable for applications where heat management is important. Its compact SOD-123 package ensures minimal thermal build-up.
* Operating Temperature Range: The diode’s operating temperature range of -65°C to +150°C ensures it remains functional under a wide array of environmental conditions, making it suitable for automotive, industrial, and consumer electronics.
* Storage Temperature Range: With a storage temperature range from -65°C to +150°C, the diode can be safely stored under extreme temperature conditions without degradation of its performance.

Mechanical and Packaging Details

* Package Type: SOD-123, a small, surface-mount package ideal for high-density PCB designs
* Package Size: Small footprint, which is typically 2.6 mm x 1.3 mm for SOD-123, making it suitable for space-constrained applications
* Marking: The part is clearly marked with the BZX84 logo and a three-digit code for traceability
* RoHS Compliant: The diode meets the requirements of the RoHS directive, ensuring it is free from hazardous materials, such as lead and mercury

Reliability and Long-Term Performance

* High Surge Withstand Capability: The BZX84C39Q-13-F is designed to withstand high surge currents and is capable of handling transient spikes in the voltage with minimal degradation in performance.
* Long-Term Stability: This Zener diode is engineered for long-term stability, offering reliable operation over extended periods of use, even under extreme thermal and electrical stresses.
* Low Failure Rate: The BZX84C39Q-13-F exhibits a very low failure rate, which contributes to its suitability in applications requiring high reliability.

Summary
The Diodes Inc. BZX84C39Q-13-F is a reliable and efficient Zener diode offering precise voltage regulation, low reverse leakage current, and high surge withstand capability. With a nominal Zener voltage of 39 V, low power dissipation, and a compact SOD-123 package, it is ideal for voltage clamping, transient voltage suppression, and power supply protection in a wide range of electronic applications. Its robustness, wide operating temperature range, and long-term stability make it a preferred choice in automotive, industrial, and consumer electronics.