1N5355BRLG: Premium 18V Zener Diode for Superior Voltage Regulation

The 1N5355BRLG from Onsemi represents the gold standard in Zener diode technology, offering engineers an exceptional solution for precision voltage regulation. This comprehensive guide explores why this 18V diode stands out in the competitive semiconductor market.

In-Depth Technical Specifications

Voltage Characteristics

With its 18V nominal Zener voltage and tight 5% tolerance, the 1N5355BRLG delivers unparalleled voltage stability. The diode maintains consistent regulation across:

• Temperature fluctuations (-65 C to +200 C)
• Current variations (tested up to 1A forward current)
• Extended operational periods

Power Management

The component's 5W power dissipation capability makes it ideal for demanding applications. Key thermal features include:

• Low thermal resistance of 20 C/W
• Axial lead package for optimal heat dissipation
• Stable performance at maximum power ratings

Advanced Performance Features

Precision Engineering

The diode's 2.5 maximum impedance ensures minimal voltage fluctuations during operation. Additional precision characteristics:

• Reverse leakage current limited to 500nA @ 13.7V
• Sharp breakdown characteristics
• Excellent voltage-temperature coefficient

Robust Construction

Built for reliability in harsh environments:

• Military-grade silicon construction
• Hermetically sealed glass package
• Axial lead design for vibration resistance

Industry-Leading Applications

Power Supply Solutions

Ideal for:

• Voltage reference circuits
• Linear regulator designs
• Switching power supply protection

Protection Circuits

Critical for:

• Transient voltage suppression
• ESD protection networks
• Overvoltage crowbar circuits

Industrial Systems

Proven performance in:

• Motor control circuits
• PLC input protection
• Automotive electronics

Competitive Advantages

Superior to Standard Diodes

The 1N5355BRLG outperforms generic Zener diodes with:

• 50% better power handling than typical 3W devices
• Tighter voltage tolerance ( 5% vs standard 10%)
• Lower impedance for improved regulation

Design Flexibility

Engineers benefit from:

• Through-hole mounting for prototyping ease
• Standard T-18 package compatibility
• Simple parallel configurations for higher power

Technical Comparison Table

Parameter	1N5355BRLG	Standard 18V Zener
Power Rating	5W	3W
Tolerance	5%	10%
Zzt	2.5	5
Temperature Range	-65 C to +200 C	-55 C to +150 C

Implementation Guidelines

Circuit Design Tips

For optimal performance:

• Maintain minimum 10mA bias current
• Use proper heat sinking above 2W dissipation
• Implement current limiting resistors

Reliability Considerations

Maximize service life by:

• Avoiding reverse bias near maximum ratings
• Preventing mechanical stress on leads
• Proper PCB spacing for heat dissipation

Why Choose Onsemi's 1N5355BRLG?

Onsemi's reputation for quality ensures:

• Rigorous manufacturing standards
• 100% electrical testing
• Industry-leading reliability data
• Global supply chain support

Purchasing Information

Available through authorized distributors with:

• Bulk packaging options
• Custom quantity requests
• Technical support resources

For engineers requiring precise voltage regulation in demanding environments, the 1N5355BRLG represents the optimal combination of performance, reliability, and value in Zener diode technology.