VLZ22B-GS08 Equivalent & Substitute Parts

Part Overview

The VLZ22B-GS08 is a Zener Diode rated at 20.64 V with 500 mW power dissipation in a Surface Mount SOD-80 QuadroMELF package, manufactured by Vishay General Semiconductor - Diodes Division. This component is classified as Obsolete, indicating discontinuation from the manufacturer. Locating equivalent or substitute parts is necessary to support ongoing production requirements, maintenance operations, and design continuity for applications currently utilizing this component.

Substiute Parts

VLZ22B-GS08

Vishay General Semiconductor - Diodes DivisionIn Stock: 1163VLZ22B-GS08 Datasheet

Current PartRFQ

TLZ22B-GS08

Vishay General Semiconductor - Diodes DivisionIn Stock: 1759TLZ22B-GS08 Datasheet

DirectRFQ

1N5541BUR-1

Microchip TechnologyIn Stock: 8391N5541BUR-1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the VLZ22B-GS08 are identified based on the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Zener voltage rating within acceptable tolerance of 20.64 V
• Power dissipation capacity of 500 mW or greater
• Surface Mount mounting technology
• Operating temperature range of -65°C to 175°C or broader
• RoHS3 compliance and REACH unaffected status
• Automotive-grade qualification where applicable

Substitute Classification:

The TLZ22B-GS08 represents a direct manufacturer alternative from Vishay General Semiconductor - Diodes Division, offering an active product status with a nominal Zener voltage of 22 V and identical power rating. This part maintains the same thermal operating range and compliance certifications.

The 1N5541BUR-1 from Microchip Technology provides a cross-manufacturer substitute with a 22 V Zener rating and 500 mW power capacity. This part utilizes a DO-213AA package instead of SOD-80, requiring mechanical and layout verification for board-level compatibility.

Parameter Comparison

Engineering Selection Recommendations

TLZ22B-GS08 Selection Criteria:

The TLZ22B-GS08 is the preferred substitute when product continuity within the Vishay General Semiconductor - Diodes Division product line is required. This part maintains Active product status, ensuring long-term availability and supply chain stability. Both the main part and this substitute share identical thermal operating ranges (-65°C to 175°C), power dissipation (500 mW), impedance specifications (30 Ohms maximum), and forward voltage characteristics (1.5 V @ 200 mA). The TLZ22B-GS08 carries ROHS3 compliance and MSL 1 rating, matching the original specification. The nominal Zener voltage difference of 1.36 V (22 V versus 20.64 V) requires circuit-level evaluation to confirm functional compatibility. Both parts utilize SOD-80 package variants (QuadroMELF versus MiniMELF), necessitating physical footprint verification for printed circuit board layout compatibility.

1N5541BUR-1 Selection Criteria:

The 1N5541BUR-1 serves as a cross-manufacturer substitute from Microchip Technology for applications where Vishay-specific sourcing constraints exist. This part maintains the 500 mW power rating and -65°C to 175°C operating temperature range. The 22 V nominal Zener voltage aligns with the TLZ22B-GS08. However, significant parameter differences exist: impedance is specified at 100 Ohms (versus 30 Ohms for the main part), forward voltage is lower at 1.1 V @ 200 mA, and reverse leakage current is substantially lower at 10 nA @ 19.8 V. The DO-213AA package differs from the SOD-80 variants, requiring complete board-level redesign and mechanical validation. The ±5% tolerance specification provides defined voltage accuracy. This substitute is suitable only when circuit design accommodates the impedance and forward voltage parameter variations and when package footprint changes are acceptable.

Frequently Asked Questions (FAQ)

Q: Can the TLZ22B-GS08 be used as a direct replacement for the VLZ22B-GS08 without circuit modification?

A: The TLZ22B-GS08 shares identical power dissipation, impedance, forward voltage, and operating temperature specifications with the VLZ22B-GS08. The nominal Zener voltage difference of 1.36 V (22 V versus 20.64 V) requires circuit-level analysis to confirm functional compatibility. Physical footprint compatibility between SOD-80 QuadroMELF and SOD-80 MiniMELF packages must be verified for the specific printed circuit board layout.

Q: What are the key differences between the TLZ22B-GS08 and 1N5541BUR-1 substitutes?

A: Both parts share 500 mW power rating and 22 V nominal Zener voltage. The TLZ22B-GS08 maintains 30 Ohms impedance and 1.5 V forward voltage, matching the original part specifications. The 1N5541BUR-1 specifies 100 Ohms impedance and 1.1 V forward voltage, representing significant electrical parameter variations. Package differences (SOD-80 MiniMELF versus DO-213AA) require mechanical redesign for the 1N5541BUR-1 implementation.

Q: Is the reverse leakage current difference between substitutes significant?

A: The main part specifies 40 µA reverse leakage at 19.6 V. The TLZ22B-GS08 specifies 40 nA at 19.6 V, and the 1N5541BUR-1 specifies 10 nA at 19.8 V. These differences reflect manufacturing process variations between manufacturers and product generations. Circuit-level evaluation is required to determine if leakage current specifications impact application performance.

Q: What compliance certifications apply to each substitute part?

A: The VLZ22B-GS08 and TLZ22B-GS08 both carry ROHS3 compliance, MSL 1 rating, and REACH unaffected status. The 1N5541BUR-1 compliance specifications are not provided in the available technical data. Compliance verification with the 1N5541BUR-1 manufacturer is required for applications with specific regulatory requirements.

Q: Are package footprints interchangeable between the three parts?

A: No. The VLZ22B-GS08 uses SOD-80 QuadroMELF packaging, the TLZ22B-GS08 uses SOD-80 MiniMELF packaging, and the 1N5541BUR-1 uses DO-213AA packaging. While both Vishay parts utilize SOD-80 variants, physical dimensions and land pattern differences between QuadroMELF and MiniMELF require footprint verification. The 1N5541BUR-1 DO-213AA package requires complete board redesign.

Q: Which substitute part is recommended for automotive applications?

A: The VLZ22B-GS08 carries automotive-grade qualification with AEC-Q101 certification. The TLZ22B-GS08 maintains the same thermal operating range and compliance profile as the original part. Automotive qualification status for the 1N5541BUR-1 is not specified in the available technical data. For automotive applications, the TLZ22B-GS08 is the preferred substitute.