GSOT08C-E3-18 Equivalent & Substitute Parts

Part Overview

The GSOT08C-E3-18 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component is rated for 8V reverse standoff voltage with a 19.2V maximum clamping voltage and 18A peak pulse current (8/20µs). The device is housed in a SOT-23-3 surface mount package and is classified as Active product status. Alternative equivalent parts may be required due to inventory constraints, supply chain considerations, or specific application requirements where substitute electrical characteristics remain within acceptable operating parameters.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	8V (Max)	V
Voltage - Breakdown (Min)	9V	V
Voltage - Clamping (Max) @ Ipp	19.2V	V
Current - Peak Pulse (10/1000µs)	18A	A
Power - Peak Pulse	345W	W
Capacitance @ Frequency	160pF @ 1MHz	pF
Operating Temperature Range	-55°C to 150°C	°C
Package / Case	SOT-23-3	—
Type	Zener	—
Channels	2 (Unidirectional)	—

Substitute Part Grouping Explanation

Substitution eligibility for the GSOT08C-E3-18 is determined by the following critical parameters:

Voltage Rating Compatibility: Reverse standoff voltage of 8V and breakdown voltage minimum of 9V
Clamping Voltage: Maximum clamping voltage at 19.2V or lower
Peak Pulse Current: Minimum 18A rating at 8/20µs pulse width
Package Compatibility: SOT-23-3 surface mount package
Temperature Range: Operating range of -55°C to 150°C
Compliance: RoHS3 compliance and REACH unaffected status

The substitute parts listed below meet these electrical and mechanical requirements within the specified tolerances for general purpose TVS diode applications.

Parameter Comparison

Parameter	GSOT08C-E3-18 (Main)	GSOT08C-E3-08 (Substitute)	CDSOT23-T08C (Substitute)
Manufacturer	Vishay General Semiconductor	Vishay General Semiconductor	Bourns Inc.
Voltage - Reverse Standoff (Typ)	8V (Max)	8V (Max)	8V
Voltage - Breakdown (Min)	9V	9V	8.5V
Voltage - Clamping (Max) @ Ipp	19.2V	19.2V	16.9V
Current - Peak Pulse (8/20µs)	18A	18A	34A
Power - Peak Pulse	345W	345W	500W
Capacitance @ 1MHz	160pF	160pF	150pF
Operating Temperature	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C
Package / Case	SOT-23-3	SOT-23-3	SOT-23-3
Type	Zener (Unidirectional, 2 Ch)	Zener (Unidirectional, 2 Ch)	Zener (Bidirectional, 1 Ch)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active

Engineering Selection Recommendations

GSOT08C-E3-08 (Vishay): This direct Vishay substitute maintains identical electrical specifications to the main part number, including voltage ratings, peak pulse current, and power dissipation. Both parts share the same base product number (GSOT08) and unidirectional channel configuration. This substitute is recommended where Vishay product continuity is preferred. Inventory availability is significantly higher (31,096 pcs vs. 793 pcs).

CDSOT23-T08C (Bourns): This Bourns TVS diode operates within the same voltage standoff range (8V) and maintains compatibility with the SOT-23-3 package footprint. The clamping voltage is lower (16.9V vs. 19.2V), and peak pulse current capability is higher (34A vs. 18A). This part features bidirectional protection (1 channel) compared to the unidirectional design of the main part. All three components maintain identical operating temperature ranges and RoHS3 compliance. Selection of this substitute requires verification that the lower clamping voltage and bidirectional topology are acceptable for the target application.

Frequently Asked Questions (FAQ)

Q: Can GSOT08C-E3-08 be used as a direct replacement for GSOT08C-E3-18?

A: Yes. Both parts are manufactured by Vishay and share identical electrical specifications across all critical parameters: 8V reverse standoff voltage, 9V minimum breakdown voltage, 19.2V maximum clamping voltage, 18A peak pulse current, and 345W peak pulse power. Both use the SOT-23-3 package and maintain the same unidirectional, 2-channel configuration. The primary difference is packaging designation (E3-08 vs. E3-18), which does not affect electrical performance.

Q: What are the key differences between GSOT08C-E3-18 and CDSOT23-T08C?

A: The CDSOT23-T08C (Bourns) differs in three aspects: (1) Clamping voltage is lower at 16.9V compared to 19.2V; (2) Peak pulse current is higher at 34A compared to 18A; (3) Channel configuration is bidirectional (1 channel) versus unidirectional (2 channels). The reverse standoff voltage (8V) and operating temperature range (-55°C to 150°C) remain compatible. All three components are RoHS3 compliant and housed in SOT-23-3 packages.

Q: Are all three parts pin-compatible in SOT-23-3 packages?

A: All three parts use the SOT-23-3 surface mount package with identical physical dimensions and pin spacing. However, the unidirectional versus bidirectional topology differences between Vishay and Bourns designs may affect circuit behavior. Verify that the specific pin configuration and protection polarity match your application requirements before substitution.

Q: What compliance certifications apply to these TVS diodes?

A: All three parts (GSOT08C-E3-18, GSOT08C-E3-08, and CDSOT23-T08C) are RoHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Moisture sensitivity level is 1 (Unlimited) for all parts. These certifications ensure suitability for commercial and industrial applications without additional environmental restrictions.

Q: Which substitute should be selected for general purpose TVS applications?

A: GSOT08C-E3-08 is the primary substitute, as it maintains complete electrical and functional equivalence to the main part. CDSOT23-T08C is an alternative where higher peak pulse current capability (34A) and lower clamping voltage (16.9V) are beneficial, provided the bidirectional topology is compatible with your circuit design.

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