GSOT03C-E3-18 Equivalent & Substitute Parts

Part Overview

The GSOT03C-E3-18 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component is rated for 3.3V reverse standoff voltage with a 12.3V maximum clamping voltage and 30A peak pulse current (8/20µs). The device is housed in a SOT-23-3 surface mount package and is classified as Active product status. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across packaging and qualification variants.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	3.3V (Max)	V
Voltage - Breakdown (Min)	4V	V
Voltage - Clamping (Max) @ Ipp	12.3V	V
Current - Peak Pulse (10/1000µs)	30A (8/20µs)	A
Power - Peak Pulse	369W	W
Capacitance @ Frequency	420pF @ 1MHz	pF
Operating Temperature	-55°C ~ 150°C (TJ)	°C
Package / Case	TO-236-3, SC-59, SOT-23-3	-
Type	Zener	-
Unidirectional Channels	2	-

Substitute Part Grouping Explanation

Substitution eligibility for the GSOT03C-E3-18 is determined by the following criteria:

Electrical Parameters (Must Match):

Voltage - Reverse Standoff (Typ): 3.3V (Max)
Voltage - Breakdown (Min): 4V
Voltage - Clamping (Max) @ Ipp: 12.3V
Current - Peak Pulse (10/1000µs): 30A (8/20µs)
Power - Peak Pulse: 369W
Capacitance @ Frequency: 420pF @ 1MHz
Operating Temperature: -55°C ~ 150°C (TJ)

Mechanical Parameters (Must Match):

Package / Case: SOT-23-3
Mounting Type: Surface Mount
Type: Zener
Unidirectional Channels: 2

Allowed Variations:

Packaging format (Cut Tape, Tape & Reel, Digi-Reel)
Qualification grade (standard or automotive AEC-Q101)
Supplier device package designation

Substitute parts maintain identical electrical and mechanical specifications while differing only in packaging configuration or automotive qualification status.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Clamping (Max)	Current - Peak Pulse	Power - Peak Pulse	Capacitance @ 1MHz	Operating Temperature	Package	Packaging Format	Qualification	Inventory (Pcs)
GSOT03C-E3-18	Vishay	3.3V (Max)	12.3V	30A (8/20µs)	369W	420pF	-55°C ~ 150°C	SOT-23-3	Digi-Reel	Standard	998
GSOT03C-E3-08	Vishay	3.3V (Max)	12.3V	30A (8/20µs)	369W	420pF	-55°C ~ 150°C	SOT-23-3	Cut Tape & Digi-Reel	Standard	117916
GSOT03C-G3-08	Vishay	3.3V (Max)	12.3V	30A (8/20µs)	369W	420pF	-55°C ~ 150°C	SOT-23-3	Tape & Reel	Standard	2072
GSOT03C-G3-18	Vishay	3.3V (Max)	12.3V	30A (8/20µs)	369W	420pF	-55°C ~ 150°C	SOT-23-3	Tape & Reel	Standard	10963
GSOT03C-HE3-08	Vishay	3.3V (Max)	12.3V	30A (8/20µs)	369W	420pF	-55°C ~ 150°C	SOT-23-3	Tape & Reel	AEC-Q101	16144
GSOT03C-HG3-08	Vishay	3.3V (Max)	12.3V	30A (8/20µs)	369W	420pF	-55°C ~ 150°C	SOT-23-3	Tape & Reel	AEC-Q101	43254
CDSOT23-T03C	Bourns Inc.	3.3V	10.9V	43A (8/20µs)	500W	300pF	-55°C ~ 150°C	SOT-23-3	Tape & Reel	Standard	9164

Engineering Selection Recommendations

Vishay GSOT03C Series (Direct Substitutes): The GSOT03C-E3-08, GSOT03C-G3-08, GSOT03C-G3-18, GSOT03C-HE3-08, and GSOT03C-HG3-08 are direct electrical and mechanical equivalents to the GSOT03C-E3-18. All maintain identical voltage ratings, current handling, and thermal specifications. Selection among these variants is determined by packaging requirements and supply chain availability. Standard-grade variants (E3, G3 series) are suitable for general-purpose applications. Automotive-qualified variants (HE3, HG3 series) with AEC-Q101 certification are required for automotive applications and provide enhanced reliability documentation.

Bourns CDSOT23-T03C (Limited Compatibility): The CDSOT23-T03C from Bourns Inc. shares the same SOT-23-3 package and operating temperature range. However, this part exhibits different electrical characteristics: lower clamping voltage (10.9V vs. 12.3V), higher peak pulse current (43A vs. 30A), higher power dissipation (500W vs. 369W), and lower capacitance (300pF vs. 420pF). The CDSOT23-T03C is a bidirectional device with a single channel, whereas the GSOT03C-E3-18 is unidirectional with two channels. This part is not a direct substitute and should only be selected when its specific electrical characteristics are compatible with the application requirements.

Frequently Asked Questions (FAQ)

Q: Can I substitute GSOT03C-E3-08 for GSOT03C-E3-18? A: Yes. Both parts are electrically and mechanically identical. The difference is packaging format: GSOT03C-E3-08 is supplied in Cut Tape and Digi-Reel format, while GSOT03C-E3-18 is supplied in Digi-Reel format. Selection depends on your assembly process requirements.

Q: What is the difference between standard and automotive-qualified variants? A: Automotive-qualified variants (GSOT03C-HE3-08, GSOT03C-HG3-08) carry AEC-Q101 certification and are intended for automotive applications. Standard variants (GSOT03C-E3-08, GSOT03C-G3-08, GSOT03C-G3-18) are suitable for general-purpose applications. Electrical and mechanical specifications are identical; qualification status differs.

Q: Is CDSOT23-T03C a suitable replacement? A: The CDSOT23-T03C is not a direct substitute. While it shares the same package and temperature range, it has different electrical characteristics including lower clamping voltage, higher peak current, and different channel configuration (bidirectional vs. unidirectional). Use only if your application requirements specifically match the CDSOT23-T03C electrical specifications.

Q: What packaging formats are available? A: Vishay GSOT03C variants are available in Cut Tape (CT), Digi-Reel, and Tape & Reel (TR) formats. Bourns CDSOT23-T03C is supplied in Tape & Reel format. Packaging selection is based on assembly equipment compatibility and volume requirements.

Q: Are all parts RoHS3 compliant? A: Yes. All listed parts are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited) and REACH Unaffected status.

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