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1SMB5919BT3G

Zener diode, 5.6V, 500mW, ±5%, SMB (DO-214AA), IZT 28.2mA

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Manufacturer Part：

1SMB5919BT3G

Package：

SMB (DO-214AA) 5.6 x 3.6 x 2.2 mm

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Description

Product Overview

The onsemi 1SMB5919BT3G is a 500 mW Zener voltage regulator diode in an SMB (DO-214AA) surface-mount package. It provides a nominal Zener voltage of 5.6 V with ±5% tolerance, suitable for voltage regulation and protection in a variety of electronic applications.

Key Specifications

Zener Voltage (VZ) 5.6 V (Nominal)
Tolerance ±5%
Power Dissipation (Max) 500 mW
Test Current (IZT) 28.2 mA
Zener Impedance (ZZT) 7 Ω (Typ)
Reverse Leakage Current 0.1 µA @ 2 V
Forward Voltage (VF) 1.1 V @ 200 mA
Operating Temperature -55°C to +150°C (TJ)
Package SMB (DO-214AA)

Features

  • 500 mW steady-state power dissipation in compact SMB package
  • Nominal 5.6 V Zener voltage with ±5% tolerance
  • Low Zener impedance of 7 Ω typical for stable regulation
  • Wide operating temperature range from -55°C to +150°C
  • Pb-Free and RoHS compliant
  • Ideal for 5V logic level protection and regulation

Applications

  • 5V logic level voltage regulation and protection
  • Reference voltage generation for ADC/DAC circuits
  • Overvoltage protection for microcontroller I/O
  • Power supply clamping circuits
  • Automotive and industrial control systems

The onsemi 1SMB5919BT3G is a 5.6 V Zener voltage regulator diode from the 1SMB59xxB series, housed in an SMB surface-mount package. Designed for voltage regulation and transient suppression, it offers 500 mW power dissipation with ±5% tolerance. The 5.6 V nominal Zener voltage makes it particularly suitable for 5V logic level protection, as it clamps slightly above the standard 5V supply rail. The low Zener impedance of 7 Ω ensures minimal voltage variation under load changes. The device is Pb-Free and RoHS compliant, operating over the full -55°C to +150°C temperature range.

The 1SMB5919BT3G operates in reverse breakdown mode. When the reverse voltage across the diode reaches the Zener breakdown voltage (5.6 V nominal), the PN junction enters avalanche breakdown, conducting current while maintaining a nearly constant voltage. The Zener impedance of 7 Ω represents the slope resistance in this region — lower impedance means better regulation. At a test current of 28.2 mA, the voltage is held within ±5% of the nominal value. In forward bias, the diode conducts at approximately 1.1 V (like a standard silicon diode). Power dissipation is limited to 500 mW at 25°C, with linear derating above this temperature.

Pin Name Type Function
1 Cathode Terminal Marked by band — connect to higher voltage for Zener regulation
2 Anode Terminal Connect to lower voltage or ground for Zener regulation
  • 5V logic supply rail overvoltage protection in digital circuits
  • Reference voltage generation for ADC and DAC systems
  • Microcontroller I/O pin clamping against ESD and transients
  • Power supply output voltage stabilization
  • Automotive ECU input protection circuits
Manufacturer Part Number Package Notes
Vishay SMBJ5V6A SMB TVS variant, 5.6V standoff
Nexperia BZG03C5V6 SMB Equivalent Zener, 1.3W
onsemi 1SMB5919AT3G SMB ±5% tolerance variant
ROHM SMBZ5V6 SMB Equivalent 5.6V Zener
onsemi 1N5242BRLG DO-35 Through-hole 5.6V Zener, 500mW
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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China

 

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Contact Information

Email: info@ic-vendor.com

Tel / WhatsApp: +86 13760382860

Service & Packaging

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

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2. Genuine Product Guarantee & Full-process Quality Inspection

All products are sourced from official authorized channels and are 100% original genuine parts. Every batch of goods undergoes strict full-process quality inspection before delivery, with complete batch records and traceability documents provided. Our products comply with AEC-Q standards for automotive electronics and high-reliability specifications for medical devices. We eliminate counterfeits, refurbished parts and defective products from the source to secure your project production.

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Contact Information

For service consultation or packaging customization, please feel free to contact us:
Email: info@ic-vendor.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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