VLZ27D-GS08 Equivalent & Substitute Zener Diodes Reference

Part Overview

The VLZ27D-GS08 is a Zener diode from Vishay General Semiconductor - Diodes Division, part of the VLZ series, housed in an SOD-80 QuadroMELF package. It provides a nominal Zener voltage of 26.97 V with a maximum power dissipation of 500 mW, suitable for surface mount automotive applications and qualified under AEC-Q101. Its product status is Obsolete, necessitating the selection of alternative models for continued supply, manufacturing continuity, and inventory management.

Key Parameters

Parameter	Value
Manufacturer	Vishay General Semiconductor - Diodes Division
Category	Diodes, Zener
Voltage - Zener (Nom) (Vz)	26.97 V
Power - Max	500 mW
Impedance (Max) (Zzt)	45 Ohms
Current - Reverse Leakage @ Vr	40 µA @ 25 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 Variant
Supplier Device Package	SOD-80 QuadroMELF
Grade	Automotive
Qualification	AEC-Q101
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
MSL	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution between Zener diode models is determined by matching the key electrical and mechanical parameters: Zener voltage, maximum power dissipation, maximum impedance, maximum reverse leakage current, forward voltage at specified test current, operating temperature range, mounting style, package form factor, product compliance status, moisture sensitivity, and qualification grade. Substitute parts are accepted only if all stated parameters are consistent with the original specification as provided.

Parameter Comparison

Parameter	VLZ27D-GS08	TLZ27D-GS08
Manufacturer	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division
Category	Diodes, Zener	Diodes, Zener
Series	VLZ	TLZ
Product Status	Obsolete	Active
Voltage - Zener (Nom) (Vz)	26.97 V	27 V
Power - Max	500 mW	500 mW
Impedance (Max) (Zzt)	45 Ohms	45 Ohms
Current - Reverse Leakage @ Vr	40 µA @ 25 V	40 nA @ 25 V
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 200 mA	1.5 V @ 200 mA
Operating Temperature	-65°C ~ 175°C	-65°C ~ 175°C
Mounting Type	Surface Mount	Surface Mount
Package / Case	SOD-80 Variant	DO-213AC, MINI-MELF, SOD-80
Supplier Device Package	SOD-80 QuadroMELF	SOD-80 MiniMELF
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The VLZ27D-GS08 is classified as Obsolete. The TLZ27D-GS08 is designated as Active, shares the same category, manufacturer, RoHS3 compliance, moisture sensitivity level, and REACH status, and maintains key electrical characteristics. The TLZ27D-GS08 is suitable as a substitute based strictly on the provided electrical, thermal, and compliance parameters.

Frequently Asked Questions (FAQ)

Q1: What criteria are used to select substitutes for the VLZ27D-GS08 Zener diode?
A1: Substitutes must match the Zener voltage, maximum power, maximum impedance, reverse leakage current, forward voltage at specified current, operating temperature, and mounting and package type, as well as maintaining compliance and qualification status.

Q2: Are the SOD-80 QuadroMELF and SOD-80 MiniMELF packages compatible?
A2: The substitute TLZ27D-GS08 uses the SOD-80 MiniMELF package type as specified; compatibility must be based on the explicit package information provided.

Q3: Is there a difference in Zener voltage rating between the VLZ27D-GS08 and its substitute?
A3: The VLZ27D-GS08 specifies a nominal Zener voltage of 26.97 V. The TLZ27D-GS08 specifies 27 V.

Q4: How does reverse leakage compare between models?
A4: The VLZ27D-GS08 lists a reverse leakage of 40 µA @ 25 V. The TLZ27D-GS08 lists 40 nA @ 25 V.

Q5: What compliance standards are held by both parts?
A5: Both parts are ROHS3 Compliant and REACH Unaffected according to the provided data.

Q6: Why is sourcing an alternative necessary for the VLZ27D-GS08?
A6: The VLZ27D-GS08 is Obsolete and no longer in active production, making substitutes necessary for continued design and production use.

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