VLZ16B-GS08 Equivalent & Substitute Parts

Part Overview

The VLZ16B-GS08 is a Zener diode rated at 15.65 V nominal with 500 mW power dissipation, manufactured by Vishay General Semiconductor - Diodes Division. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design requirements and procurement needs. The part is qualified to AEC-Q101 automotive standards and is housed in an SOD-80 QuadroMELF surface mount package. Substitute parts must maintain electrical compatibility across voltage regulation, power handling, and thermal operating ranges while accommodating available packaging options.

Key Parameters

Parameter	VLZ16B-GS08
Voltage - Zener (Nom) (Vz)	15.65 V
Power - Max	500 mW
Impedance (Max) (Zzt)	18 Ohms
Current - Reverse Leakage @ Vr	40 µA @ 14.5 V
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 200 mA
Operating Temperature	-65°C ~ 175°C
Mounting Type	Surface Mount
Package / Case	SOD-80 QuadroMELF
Grade	Automotive
Qualification	AEC-Q101
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the VLZ16B-GS08 are selected based on the following critical parameters that determine functional equivalence:

Primary Substitution Criteria:

Zener voltage nominal rating within acceptable circuit tolerance
Power dissipation capacity of 500 mW minimum
Surface mount configuration for PCB compatibility
Operating temperature range spanning -65°C to 175°C minimum
Impedance characteristics suitable for voltage regulation applications

Secondary Compatibility Factors:

Forward voltage characteristics at specified current levels
Reverse leakage current specifications
RoHS and regulatory compliance status
Package form factor and thermal characteristics

The substitute parts identified maintain the core electrical specifications required for zener diode voltage regulation while accommodating variations in package geometry, impedance tolerance, and manufacturing source.

Parameter Comparison

Parameter	VLZ16B-GS08	TLZ16B-GS08	1N4110UR-1	BZV55-B16,115
Manufacturer	Vishay General Semiconductor	Vishay General Semiconductor	Microchip Technology	NXP USA Inc.
Voltage - Zener (Nom) (Vz)	15.65 V	16 V	16 V	16 V
Tolerance	-	-	±5%	±2%
Power - Max	500 mW	500 mW	500 mW	500 mW
Impedance (Max) (Zzt)	18 Ohms	18 Ohms	100 Ohms	40 Ohms
Current - Reverse Leakage @ Vr	40 µA @ 14.5 V	40 nA @ 14.5 V	50 nA @ 12.2 V	50 nA @ 11.2 V
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 200 mA	1.5 V @ 200 mA	1.1 V @ 200 mA	900 mV @ 10 mA
Operating Temperature	-65°C ~ 175°C	-65°C ~ 175°C	-65°C ~ 175°C	-65°C ~ 200°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	SOD-80 QuadroMELF	SOD-80 MiniMELF	DO-213AA	SOD-80 MiniMELF
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	Not specified

Engineering Selection Recommendations

TLZ16B-GS08 (Vishay General Semiconductor - Diodes Division)

The TLZ16B-GS08 is the primary direct substitute for the VLZ16B-GS08. Both components are manufactured by Vishay and share identical electrical specifications: 16 V nominal zener voltage, 500 mW power rating, 18 Ohms maximum impedance, and -65°C to 175°C operating temperature range. The TLZ16B-GS08 is currently in active production status with 3300 units in stock. The component maintains ROHS3 compliance and AEC-Q101 qualification equivalent performance. The primary difference is the package variant: TLZ16B-GS08 uses SOD-80 MiniMELF versus the QuadroMELF variant of the original part. Both packages are SOD-80 form factors suitable for surface mount assembly. This substitute is recommended for applications requiring direct electrical equivalence with active supply chain availability.

BZV55-B16,115 (NXP USA Inc.)

The BZV55-B16,115 is a functionally equivalent substitute manufactured by NXP USA Inc. with 16 V nominal zener voltage and 500 mW power rating. This component offers superior impedance characteristics at 40 Ohms maximum and tighter voltage tolerance of ±2%. The operating temperature range extends to 200°C, providing enhanced thermal margin. The BZV55-B16,115 is available in high volume (432,441 units in stock) and uses the SOD-80 MiniMELF package. This substitute is suitable for applications where improved impedance stability and extended temperature operation are beneficial.

1N4110UR-1 (Microchip Technology)

The 1N4110UR-1 is a functional substitute with 16 V nominal zener voltage and 500 mW power rating. This component is manufactured by Microchip Technology and is currently in active production. The 1N4110UR-1 features lower forward voltage (1.1 V @ 200 mA) compared to the original part. However, this substitute exhibits higher impedance (100 Ohms maximum) and uses the DO-213AA package form factor rather than SOD-80. The component carries RoHS non-compliance status, which may restrict use in applications with strict environmental compliance requirements. This substitute is applicable for designs where package form factor flexibility and forward voltage characteristics are acceptable trade-offs.

Frequently Asked Questions (FAQ)

Q: Can the TLZ16B-GS08 directly replace the VLZ16B-GS08 in existing designs?

A: The TLZ16B-GS08 is electrically equivalent to the VLZ16B-GS08 across all critical parameters: zener voltage, power dissipation, impedance, and operating temperature range. Both components use SOD-80 surface mount packages. The primary consideration is PCB layout compatibility between QuadroMELF and MiniMELF package variants, which share the same SOD-80 footprint specifications. Verification of physical dimensions against PCB design files is required.

Q: What is the voltage difference between the VLZ16B-GS08 (15.65 V) and substitute parts rated at 16 V?

A: The 0.35 V difference between 15.65 V and 16 V nominal ratings represents a 2.2% variance. This difference falls within typical circuit tolerance margins for voltage regulation applications. The BZV55-B16,115 provides ±2% tolerance, and the 1N4110UR-1 provides ±5% tolerance, which encompasses the nominal voltage range. Circuit validation is required to confirm acceptability within specific application requirements.

Q: Are all substitute parts suitable for automotive applications?

A: The VLZ16B-GS08 and TLZ16B-GS08 are both qualified to AEC-Q101 automotive standards. The BZV55-B16,115 and 1N4110UR-1 do not specify AEC-Q101 qualification in the provided data. Applications requiring automotive-grade components should prioritize the TLZ16B-GS08 as the primary substitute. Alternative parts require verification of automotive qualification status through manufacturer documentation.

Q: What are the package compatibility considerations?

A: The VLZ16B-GS08 uses SOD-80 QuadroMELF packaging. The TLZ16B-GS08 uses SOD-80 MiniMELF packaging. The BZV55-B16,115 uses SOD-80 MiniMELF packaging. The 1N4110UR-1 uses DO-213AA packaging. All SOD-80 variants share compatible footprints for surface mount assembly. The DO-213AA package (1N4110UR-1) requires different PCB footprint design and may not be compatible with existing layouts designed for SOD-80 components.

Q: How do impedance differences affect circuit performance?

A: The VLZ16B-GS08 and TLZ16B-GS08 both specify 18 Ohms maximum impedance. The BZV55-B16,115 specifies 40 Ohms maximum impedance. The 1N4110UR-1 specifies 100 Ohms maximum impedance. Lower impedance values provide better voltage regulation stability and faster transient response. Higher impedance values may result in increased voltage ripple under dynamic load conditions. Circuit analysis is required to determine impedance acceptability for specific applications.

Q: What is the significance of reverse leakage current specifications?

A: The VLZ16B-GS08 specifies 40 µA reverse leakage at 14.5 V, which is significantly higher than substitute parts (40 nA to 50 nA). This difference indicates improved leakage characteristics in substitute components. Lower reverse leakage current reduces standby power consumption and improves circuit efficiency. Applications sensitive to leakage current will benefit from substitute parts with lower leakage specifications.

Q: Are there RoHS compliance considerations for substitute selection?

A: The VLZ16B-GS08 and TLZ16B-GS08 are both ROHS3 compliant. The BZV55-B16,115 RoHS status is not specified in the provided data. The 1N4110UR-1 is explicitly RoHS non-compliant. Applications subject to RoHS regulatory requirements should use the TLZ16B-GS08 as the primary substitute to maintain compliance status.

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