VESD08-02V-G-08 Equivalent & Substitute Parts

Part Overview

The VESD08-02V-G-08 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component is designed for general-purpose overvoltage protection in surface-mount applications using the SOD-523 package. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	VESD08-02V-G-08
Manufacturer	Vishay General Semiconductor - Diodes Division
Category	Transient Voltage Suppressors (TVS)
Package / Case	SC-79, SOD-523
Product Status	Obsolete
Type	Zener
Unidirectional Channels	1
Voltage - Reverse Standoff (Typ)	8V (Max)
Voltage - Breakdown (Min)	9V
Voltage - Clamping (Max) @ Ipp	30V (Typ)
Current - Peak Pulse (8/20µs)	4A
Power - Peak Pulse	120W
Capacitance @ 1MHz	35pF
Operating Temperature	-40°C ~ 125°C (TJ)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the VESD08-02V-G-08 is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Unidirectional channel configuration (1 channel required)
Voltage - Reverse Standoff (Typ) rating of 8V (Max)
Voltage - Breakdown (Min) minimum of 9V
Surface-mount package compatibility (SOD-523)
Zener diode type

Secondary Compatibility Parameters:

Voltage - Clamping (Max) @ Ipp: acceptable range 15.3V to 35V
Current - Peak Pulse (8/20µs): acceptable range 3A to 6.6A
Power - Peak Pulse: acceptable range 100W to 200W
Operating temperature range: minimum -40°C capability required
RoHS3 compliance and MSL 1 rating

Substitute parts are grouped based on their ability to meet these electrical specifications while maintaining package compatibility and environmental compliance.

Parameter Comparison

Parameter	VESD08-02V-G-08	VESD08C1-02V-G3-08	CPDH5V0U	PESD12VS1UB,115	PESD15VS1UB,115	PESD24VS1UB,115	PESD3V3L1UB,115	PESD3V3S1UB,115	PESD3V3U1UB,115	PESD5V0L1UB,115	PESD5V0S1UB,115
Manufacturer	Vishay	Vishay	Comchip	Nexperia	Nexperia	Nexperia	Nexperia	Nexperia	Nexperia	Nexperia	Nexperia
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
Voltage - Reverse Standoff (Typ)	8V (Max)	8V (Max)	5V	12V (Max)	15V (Max)	24V (Max)	3.3V (Max)	3.3V (Max)	3.3V (Max)	5V (Max)	5V (Max)
Voltage - Breakdown (Min)	9V	9.5V	6V	14.7V	17.6V	26.5V	5.3V	5.2V	4.5V	6.4V	6.4V
Voltage - Clamping (Max) @ Ipp	30V (Typ)	15.3V	12.5V	35V	40V	70V	11V	20V	—	12V	20V
Current - Peak Pulse (8/20µs)	4A	6.6A	16A	5A	5A	3A	4.5A	18A	—	4.6A	15A
Power - Peak Pulse	120W	100W	200W	180W	160W	160W	45W	330W	—	42W	260W
Capacitance @ 1MHz	35pF	47pF	90pF	38pF	32pF	23pF	34pF	207pF	2.6pF	25pF	152pF
Operating Temperature	-40°C ~ 125°C (TJ)	-55°C ~ 150°C (TJ)	—	-65°C ~ 150°C (TA)	-65°C ~ 150°C (TA)	-65°C ~ 150°C (TA)	-55°C ~ 150°C (TA)	-65°C ~ 150°C (TA)	-55°C ~ 150°C (TA)	-55°C ~ 150°C (TA)	-65°C ~ 150°C (TA)
Package / Case	SC-79, SOD-523	SC-79, SOD-523	SC-79, SOD-523	SC-79, SOD-523	SC-79, SOD-523	SC-79, SOD-523	SC-79, SOD-523	SC-79, SOD-523	SC-79, SOD-523	SC-79, SOD-523	SC-79, SOD-523
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Grade	—	Automotive	—	Automotive	Automotive	Automotive	Automotive	Automotive	Automotive	Automotive	Automotive
Qualification	—	AEC-Q101	—	AEC-Q100	AEC-Q100	AEC-Q100	AEC-Q101	AEC-Q100	AEC-Q101	AEC-Q101	AEC-Q100

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Substitute):

VESD08C1-02V-G3-08 is the direct equivalent from Vishay General Semiconductor - Diodes Division. This part maintains the same 8V reverse standoff voltage and 9.5V minimum breakdown voltage as the obsolete VESD08-02V-G-08. The VESD08C1-02V-G3-08 is active in production, carries AEC-Q101 automotive qualification, and is available in high volume (45,300 pcs). It features an extended operating temperature range (-55°C to 150°C) and improved clamping voltage (15.3V) with higher peak pulse current (6.6A), making it a superior replacement for the obsolete part.

Alternative Substitutes by Application:

For applications requiring higher current handling capacity, PESD5V0S1UB,115 (Nexperia) offers 15A peak pulse current with 20V clamping voltage and AEC-Q100 automotive qualification. This part is suitable for 5V standoff voltage applications.

For applications requiring lower voltage standoff ratings, PESD3V3S1UB,115 (Nexperia) provides 3.3V standoff voltage with 18A peak pulse current and AEC-Q100 qualification.

For applications requiring higher voltage standoff ratings, PESD12VS1UB,115 (Nexperia) offers 12V standoff voltage with 35V clamping voltage and AEC-Q100 qualification.

All substitute parts maintain SOD-523 package compatibility, ROHS3 compliance, and MSL 1 rating. Selection should be based on the specific voltage standoff and current handling requirements of the target application.

Frequently Asked Questions (FAQ)

Q: Can VESD08C1-02V-G3-08 be used as a direct replacement for VESD08-02V-G-08?

A: Yes. Both parts share the same 8V reverse standoff voltage and 9V minimum breakdown voltage specifications. VESD08C1-02V-G3-08 is the active production equivalent and is recommended as the primary substitute. The main differences are improved clamping voltage (15.3V vs. 30V) and higher peak pulse current (6.6A vs. 4A), which provide better transient protection performance.

Q: What is the difference between the Nexperia PESD series parts and the Vishay VESD series?

A: Both manufacturers produce TVS diodes in the SOD-523 package with similar electrical characteristics. The primary differences are in voltage standoff ratings, clamping voltages, and peak pulse current capabilities. Nexperia parts generally offer higher current handling and automotive qualifications (AEC-Q100/Q101). Selection depends on the specific voltage and current requirements of your application.

Q: Are all substitute parts automotive-qualified?

A: Yes. All listed substitute parts carry either AEC-Q100 or AEC-Q101 automotive qualification. VESD08C1-02V-G3-08 carries AEC-Q101, while most Nexperia parts carry AEC-Q100. Both qualifications meet automotive reliability standards.

Q: Can I use a lower voltage standoff part as a substitute?

A: No. Using a lower voltage standoff part (such as PESD5V0S1UB,115 with 5V standoff) would result in premature triggering of the TVS diode at voltages below the design specification. The reverse standoff voltage must match or exceed the original part's rating.

Q: Can I use a higher voltage standoff part as a substitute?

A: Higher voltage standoff parts (such as PESD12VS1UB,115 with 12V standoff) are not suitable substitutes for the 8V standoff VESD08-02V-G-08. The circuit protection threshold would be shifted to a higher voltage, potentially allowing damaging transients to reach protected components.

Q: What is the significance of the clamping voltage specification?

A: Clamping voltage is the maximum voltage the TVS diode allows across its terminals during a transient event. Lower clamping voltages provide better protection for sensitive components. The VESD08-02V-G-08 specifies 30V typical clamping, while VESD08C1-02V-G3-08 provides 15.3V, offering superior protection performance.

Q: Are there any package compatibility concerns?

A: No. All listed substitute parts use the SOD-523 package (SC-79 case), which is mechanically and electrically compatible with the original VESD08-02V-G-08. No PCB layout modifications are required.

Q: What does MSL 1 (Unlimited) mean?

A: MSL 1 indicates Moisture Sensitivity Level 1 with unlimited shelf life. This means the component has minimal moisture absorption risk and does not require special dry-pack storage or baking procedures before soldering, simplifying handling and storage requirements.

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