BZX284 - Low-Power Voltage Regulator Diodes

Overview

The BZX284 series consists of low-power voltage regulator diodes designed for precision voltage regulation in a compact surface-mount package. These diodes are housed in a small ceramic SOD110 SMD package, making them ideal for space-constrained applications. The series offers 37 different voltage options with tight tolerance levels, ensuring reliable performance in various electronic circuits.

These Zener diodes are particularly suitable for applications requiring stable reference voltages or basic voltage regulation in low-power scenarios. The series is divided into two tolerance variants: the BZX284-B with ±2% tolerance and the BZX284-C with ±5% tolerance, both following the E24 normalized values.

Features

• Compact SOD110 ceramic SMD package for space-efficient designs
• Available in 37 standardized voltage options
• Two tolerance variants: ±2% (BZX284-B) and ±5% (BZX284-C)
• Low power dissipation design
• E24 normalized values for easy system design
• Reliable voltage regulation characteristics
• RoHS compliant for environmental safety
• Excellent stability over temperature and time
• Suitable for automated assembly processes

Applications

The BZX284 series finds use in numerous electronic applications where precise voltage references or basic regulation is required:

• Voltage reference circuits in analog systems
• Power supply regulation in portable devices
• Signal conditioning circuits
• Overvoltage protection circuits
• Voltage clamping applications
• Consumer electronics power management
• Industrial control systems
• Automotive electronics (non-critical systems)
• Battery-powered devices
• Sensor interface circuits

Electrical Characteristics

Absolute Maximum Ratings

• Total Power Dissipation: 350 mW
• Junction Temperature Range: -65°C to +150°C
• Storage Temperature Range: -65°C to +150°C
• Operating Temperature Range: -55°C to +125°C

Typical Electrical Parameters

All values are specified at 25°C unless otherwise noted:

• Zener Voltage Range: 2.4V to 75V (37 values available)
• Test Current (IZT): 5 mA (for voltages ≤ 20V), 1 mA (for voltages > 20V)
• Maximum Zener Impedance (ZZT): Typically 10Ω to 900Ω depending on voltage
• Leakage Current (IR): ≤ 0.1 μA at 80% of VZ
• Temperature Coefficient: Varies with voltage (typically ±5 mV/°C)

Package Information

SOD110 Package Dimensions

• Package Type: SOD110 (Ceramic Surface Mount)
• Dimensions: 3.5mm × 1.5mm × 1.1mm (L × W × H)
• Terminal Pitch: 2.5mm
• Terminal Material: Matte Tin-plated
• Package Weight: Approximately 10mg

Marking Information

The package features laser marking for identification:

• First Line: Part Number (e.g., BZX284-B5V1)
• Second Line: Date Code/Lot Number

Recommended PCB Layout

For optimal performance, follow these PCB design guidelines:

• Maintain minimum 0.5mm clearance around the component
• Use 0.3mm minimum pad width for solder joints
• Incorporate thermal relief patterns for improved soldering
• Ensure proper solder mask definition around pads

Reliability and Qualification

The BZX284 series meets stringent quality and reliability standards:

• ESD Rating: Passes 1kV Human Body Model
• Moisture Sensitivity Level (MSL): Level 1 (Unlimited floor life)
• Flammability Rating: UL94 V-0 compliant
• Qualification: AEC-Q101 available for automotive applications

Ordering Information

The BZX284 series follows this part numbering convention:

• BZX284-[Tolerance][Voltage]
• Example: BZX284-B5V1 = ±2% tolerance, 5.1V Zener voltage
• Available in tape and reel packaging for automated assembly
• Standard quantities: 3000 pieces per reel

Environmental Compliance

The BZX284 series meets the following environmental standards:

• RoHS 3 (2015/863/EU) compliant
• Halogen-free according to IEC 61249-2-21
• REACH SVHC compliant