Overview
The BZX84C18 is a surface mount Zener diode produced by Fairchild Semiconductor, now part of onsemi. This component is designed for use in electronic circuits requiring voltage regulation and transient protection. The BZX84C18 is part of the BZX84 series, which offers a range of voltage ratings, making it versatile for various applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Maximum Power Dissipation | 350 | mW |
| Repetitive Peak Forward Current (IFRM) | 250 | mA |
| Repetitive Peak Working Current (IZRM) | 250 | mA |
| Junction-to-Ambient Thermal Resistance (RθJA) | 465 | °C/W |
| Storage Temperature Range (TSTG) | -55 to +150 | °C |
| Operating Junction Temperature (TJ) | -55 to +150 | °C |
| Zener Voltage (VZ) at IZ = 5.0 mA | 16.8 - 19.1 | V |
| Dynamic Impedance (ZZ) at IZ = 5.0 mA | 45 | Ω |
Key Features
- Surface mount package (SOT-23) for compact design and ease of mounting.
- High power dissipation capability of up to 350 mW.
- Low dynamic impedance, making it suitable for voltage regulation applications.
- Wide operating temperature range from -55°C to +150°C.
- Low forward voltage drop of 0.9 V maximum at IF = 10 mA.
Applications
The BZX84C18 Zener diode is suitable for various electronic circuits requiring voltage regulation, transient protection, and noise reduction. Common applications include:
- Voltage regulation in power supplies and DC-DC converters.
- Overvoltage protection in electronic devices.
- Noise reduction and filtering in signal processing circuits.
- Clamping circuits to protect against voltage spikes.
Q & A
- What is the maximum power dissipation of the BZX84C18?
The maximum power dissipation of the BZX84C18 is 350 mW. - What is the repetitive peak forward current rating for the BZX84C18?
The repetitive peak forward current rating is 250 mA. - What is the junction-to-ambient thermal resistance of the BZX84C18?
The junction-to-ambient thermal resistance (RθJA) is 465 °C/W. - What is the operating junction temperature range for the BZX84C18?
The operating junction temperature range is -55°C to +150°C. - What is the Zener voltage range for the BZX84C18 at IZ = 5.0 mA?
The Zener voltage range at IZ = 5.0 mA is 16.8 V to 19.1 V. - What is the dynamic impedance of the BZX84C18 at IZ = 5.0 mA?
The dynamic impedance at IZ = 5.0 mA is 45 Ω. - What package type does the BZX84C18 come in?
The BZX84C18 comes in a surface mount SOT-23 package. - What are common applications for the BZX84C18?
Common applications include voltage regulation, overvoltage protection, noise reduction, and clamping circuits. - What is the forward voltage drop of the BZX84C18 at IF = 10 mA?
The forward voltage drop is 0.9 V maximum at IF = 10 mA. - Where can I find detailed specifications for the BZX84C18?
Detailed specifications can be found in the datasheet available from sources like Mouser Electronics, Digi-Key, and the onsemi website.
