VESD03-02V-G-08 Equivalent & Substitute Parts

Part Overview

The VESD03-02V-G-08 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component is designed for general-purpose transient voltage protection in surface-mount applications using the SOD-523 package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and component procurement.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	3V (Max)
Voltage - Breakdown (Min)	4V
Voltage - Clamping (Max) @ Ipp	12V (Typ)
Current - Peak Pulse (8/20µs)	9A
Power - Peak Pulse	108W
Capacitance @ 1MHz	110pF
Operating Temperature Range	-40°C to 125°C (TJ)
Package / Case	SOD-523
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the VESD03-02V-G-08 is determined by the following critical parameters:

Reverse Standoff Voltage (Vwm): Must remain within the 3V classification to maintain circuit protection thresholds
Clamping Voltage (Vc): Determines maximum transient voltage at peak pulse current; acceptable range depends on circuit tolerance
Peak Pulse Current (Ipp): Defines surge handling capability; higher values provide greater protection margin
Package Compatibility: SOD-523 surface-mount package is mandatory for PCB layout compatibility
Operating Temperature Range: Must support the thermal environment of the application
Product Status & Compliance: Active parts with current manufacturing support are preferred over obsolete components

The three substitute parts listed below meet the SOD-523 package requirement and maintain the 3V to 3.3V reverse standoff voltage classification, ensuring functional compatibility with the original design intent.

Parameter Comparison

Parameter	VESD03-02V-G-08	VESD03C1-02V-G3-08	CPDH5V0U	PESD3V3S1UB,115
Manufacturer	Vishay	Vishay	Comchip Technology	Nexperia USA Inc.
Product Status	Obsolete	Active	Active	Active
Voltage - Reverse Standoff (Typ)	3V (Max)	3V (Max)	5V	3.3V (Max)
Voltage - Breakdown (Min)	4V	4.4V	6V	5.2V
Voltage - Clamping (Max) @ Ipp	12V (Typ)	8.7V	12.5V	20V
Current - Peak Pulse (8/20µs)	9A	11.6A	16A	18A
Power - Peak Pulse	108W	100W	200W	330W
Capacitance @ 1MHz	110pF	112pF	90pF	207pF
Operating Temperature Range	-40°C to 125°C (TJ)	-55°C to 150°C (TJ)	Not specified	-65°C to 150°C (TA)
Package / Case	SOD-523	SOD-523	SOD-523	SOD-523
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Grade / Qualification	Standard	Automotive / AEC-Q101	Standard	Automotive / AEC-Q100

Engineering Selection Recommendations

VESD03C1-02V-G3-08 (Vishay) is the primary direct substitute. This part maintains identical reverse standoff voltage (3V) and breakdown voltage specifications while offering active product status. It provides automotive-grade qualification (AEC-Q101) and an extended operating temperature range (-55°C to 150°C), making it suitable for applications requiring enhanced reliability. Peak pulse current is increased to 11.6A, providing improved transient protection margin.

CPDH5V0U (Comchip Technology) is a higher-voltage alternative with 5V reverse standoff classification. This part is appropriate only for applications where the circuit design permits operation at the elevated 5V threshold. It offers significantly higher peak pulse current (16A) and power dissipation (200W), suitable for high-energy transient environments. Standard-grade qualification limits use to non-automotive applications.

PESD3V3S1UB,115 (Nexperia USA Inc.) maintains the 3.3V reverse standoff voltage classification, closely matching the original 3V specification. This part features the highest peak pulse current (18A) and power dissipation (330W) among the substitutes, providing maximum transient protection capability. Automotive-grade qualification (AEC-Q100) and extended temperature range (-65°C to 150°C) support demanding applications. Elevated capacitance (207pF) may affect high-frequency circuit performance.

Frequently Asked Questions (FAQ)

Q: Can CPDH5V0U be used as a direct replacement for VESD03-02V-G-08?

A: CPDH5V0U operates at a 5V reverse standoff voltage, compared to the original 3V specification. This part is suitable only if the circuit design accommodates the higher voltage threshold. Direct substitution without circuit analysis is not recommended.

Q: What is the difference between VESD03C1-02V-G3-08 and PESD3V3S1UB,115?

A: Both parts maintain voltage specifications compatible with the original design. VESD03C1-02V-G3-08 offers lower clamping voltage (8.7V) and capacitance (112pF), while PESD3V3S1UB,115 provides higher peak pulse current (18A) and power dissipation (330W). Selection depends on whether the application prioritizes lower clamping voltage or higher transient energy absorption.

Q: Are all substitute parts available in the same package?

A: Yes. All substitute parts use the SOD-523 surface-mount package, ensuring PCB layout compatibility with the original design without modification.

Q: Which substitute part is recommended for automotive applications?

A: Both VESD03C1-02V-G3-08 (AEC-Q101) and PESD3V3S1UB,115 (AEC-Q100) carry automotive-grade qualifications. Selection between these parts depends on specific performance requirements regarding clamping voltage, peak pulse current, and operating temperature range.

Q: Does the obsolete status of VESD03-02V-G-08 affect circuit performance?

A: Obsolete status indicates discontinued manufacturing. Functional performance is not affected if the part is already in use. For new designs or reprocurement, selection of an active substitute part ensures long-term component availability and supply chain stability.

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