VLZ22D-GS08 Equivalent & Substitute Parts

Part Overview

The VLZ22D-GS08 is a Zener Diode rated at 22.08 V with 500 mW power dissipation in a SOD-80 QuadroMELF surface mount package, manufactured by Vishay General Semiconductor - Diodes Division. This component is classified as Obsolete, which necessitates identification of equivalent substitute parts for ongoing design support and procurement continuity. The part carries AEC-Q101 automotive qualification and ROHS3 compliance.

Key Parameters

Parameter	Value
Voltage - Zener (Nom) (Vz)	22.08 V
Power - Max	500 mW
Impedance (Max) (Zzt)	30 Ohms
Current - Reverse Leakage @ Vr	40 µA @ 20.4 V
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 200 mA
Operating Temperature Range	-65°C ~ 175°C
Package / Case	SOD-80 QuadroMELF
Mounting Type	Surface Mount
Grade	Automotive
Qualification	AEC-Q101
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the VLZ22D-GS08 are selected based on the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

Zener voltage within the operating range of 22 V nominal (VLZ22D-GS08 specifies 22.08 V)
Power dissipation rating of 500 mW
Operating temperature range of -65°C to 175°C
Forward voltage and reverse leakage characteristics suitable for the application

Mechanical Compatibility Criteria:

Surface mount package configuration
SOD-80 or equivalent package footprint compatibility

Compliance Requirements:

ROHS3 compliance
Automotive-grade qualification where applicable

Two substitute parts meet these criteria: the TLZ22D-GS08 (Vishay, Active status) and the 1N5541BUR-1 (Microchip Technology, Active status). Both maintain the 22 V zener voltage, 500 mW power rating, and surface mount configuration required for direct substitution.

Parameter Comparison

Parameter	VLZ22D-GS08 (Main)	TLZ22D-GS08 (Substitute)	1N5541BUR-1 (Substitute)
Manufacturer	Vishay General Semiconductor	Vishay General Semiconductor	Microchip Technology
Product Status	Obsolete	Active	Active
Voltage - Zener (Nom) (Vz)	22.08 V	22 V	22 V
Tolerance	-	-	±5%
Power - Max	500 mW	500 mW	500 mW
Impedance (Max) (Zzt)	30 Ohms	30 Ohms	100 Ohms
Current - Reverse Leakage @ Vr	40 µA @ 20.4 V	40 nA @ 20.4 V	10 nA @ 19.8 V
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 200 mA	1.5 V @ 200 mA	1.1 V @ 200 mA
Operating Temperature	-65°C ~ 175°C	-65°C ~ 175°C	-65°C ~ 175°C (TJ)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	SOD-80 QuadroMELF	SOD-80 MiniMELF (DO-213AC)	DO-213AA
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not specified
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Not specified

Engineering Selection Recommendations

TLZ22D-GS08 (Vishay General Semiconductor - Diodes Division):

The TLZ22D-GS08 is the primary substitute for the VLZ22D-GS08. Both parts are manufactured by Vishay and share identical electrical specifications: 22 V nominal zener voltage, 500 mW power rating, 30 Ohms maximum impedance, and -65°C to 175°C operating temperature range. The TLZ22D-GS08 is currently in Active production status with significantly higher inventory availability (17,800 pieces). The package differs from QuadroMELF to MiniMELF (SOD-80 variant), which maintains SOD-80 footprint compatibility. Both parts are ROHS3 compliant with MSL 1 rating. The TLZ22D-GS08 exhibits superior reverse leakage characteristics (40 nA versus 40 µA), representing an improvement in performance. This part is the recommended substitute for direct replacement applications.

1N5541BUR-1 (Microchip Technology):

The 1N5541BUR-1 provides an alternative substitute with identical 22 V zener voltage, 500 mW power rating, and -65°C to 175°C operating temperature range. This part is manufactured by Microchip Technology and maintains Active production status. The package configuration is DO-213AA, which differs from the SOD-80 variants of the primary part and TLZ22D-GS08 substitute. The 1N5541BUR-1 includes ±5% voltage tolerance specification and exhibits lower forward voltage (1.1 V versus 1.5 V at 200 mA) and superior reverse leakage (10 nA). However, the impedance specification is higher at 100 Ohms maximum. This part is suitable for applications where package footprint compatibility with DO-213AA is acceptable and where the improved forward voltage characteristic is beneficial.

Frequently Asked Questions (FAQ)

Q: Can the TLZ22D-GS08 be used as a direct replacement for the VLZ22D-GS08?

A: The TLZ22D-GS08 is electrically compatible with the VLZ22D-GS08 for the specified zener voltage (22 V), power rating (500 mW), impedance (30 Ohms), and operating temperature range (-65°C to 175°C). Both parts use SOD-80 package variants (QuadroMELF versus MiniMELF), which maintain compatible footprints. The TLZ22D-GS08 is the recommended substitute due to identical electrical specifications and active production status.

Q: What is the difference between the SOD-80 QuadroMELF and SOD-80 MiniMELF packages?

A: Both are SOD-80 package variants used for surface mount zener diodes. The QuadroMELF and MiniMELF designations refer to different physical configurations within the SOD-80 standard. The TLZ22D-GS08 uses the MiniMELF variant (also designated DO-213AC), which maintains SOD-80 footprint compatibility with the original VLZ22D-GS08 QuadroMELF package.

Q: Why does the 1N5541BUR-1 have a higher impedance specification (100 Ohms versus 30 Ohms)?

A: Impedance (Zzt) is a parameter that varies by manufacturer design and manufacturing process. The 1N5541BUR-1 specification of 100 Ohms maximum is within acceptable ranges for 22 V zener diodes and does not preclude its use as a substitute. However, applications sensitive to impedance characteristics should verify compatibility with circuit requirements.

Q: What is the significance of the reverse leakage current difference between these parts?

A: The VLZ22D-GS08 specifies 40 µA reverse leakage at 20.4 V, while the TLZ22D-GS08 specifies 40 nA and the 1N5541BUR-1 specifies 10 nA at similar voltages. Lower reverse leakage indicates superior performance and reduced standby current consumption. Both substitute parts exhibit significantly lower leakage than the original part, representing an improvement in circuit performance.

Q: Are there package footprint compatibility concerns when substituting with the 1N5541BUR-1?

A: The 1N5541BUR-1 uses a DO-213AA package, which differs from the SOD-80 packages of the VLZ22D-GS08 and TLZ22D-GS08. DO-213AA and SOD-80 are distinct package standards with different physical dimensions and land patterns. PCB layout modifications are required for the 1N5541BUR-1 substitution. The TLZ22D-GS08 is preferred when package footprint compatibility is a requirement.

Q: What compliance certifications apply to these substitute parts?

A: The VLZ22D-GS08 and TLZ22D-GS08 are both ROHS3 compliant with AEC-Q101 automotive qualification. The 1N5541BUR-1 maintains REACH compliance but does not specify AEC-Q101 qualification or explicit ROHS3 status in the provided data. Applications requiring automotive-grade qualification should prioritize the TLZ22D-GS08.

Q: What is the inventory status of these parts?

A: The VLZ22D-GS08 (Obsolete) has 681 pieces in stock. The TLZ22D-GS08 (Active) has 17,800 pieces available, providing superior long-term procurement availability. The 1N5541BUR-1 (Active) has 805 pieces in stock. For ongoing production requirements, the TLZ22D-GS08 is the preferred choice due to higher inventory levels and active production status.

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