GSOT24C-E3-18 Equivalent & Substitute Parts

Part Overview

The GSOT24C-E3-18 is a 24V Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This unidirectional zener diode is designed for general-purpose transient voltage suppression applications, featuring a 47V maximum clamping voltage and 5A peak pulse current rating in a surface-mount SOT-23-3 package. The part is currently active and in production, with 1104 units in stock. Equivalent and substitute parts are identified when electrical parameters and mechanical compatibility remain within acceptable tolerances for the application.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	24V (Max)
Voltage - Breakdown (Min)	27V
Voltage - Clamping (Max) @ Ipp	47V
Current - Peak Pulse (10/1000µs)	5A (8/20µs)
Power - Peak Pulse	235W
Capacitance @ Frequency	65pF @ 1MHz
Operating Temperature	-55°C ~ 150°C (TJ)
Package / Case	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the GSOT24C-E3-18 are classified based on strict electrical and mechanical compatibility criteria:

Group 1: Direct Electrical Equivalents (Vishay GSOT24C Series) Parts GSOT24C-E3-08, GSOT24C-G3-08, and GSOT24C-HE3-08 are direct electrical equivalents with identical electrical specifications. These parts differ only in packaging format (Cut Tape vs. Tape & Reel) and do not affect circuit performance. The GSOT24C-HE3-08 variant includes automotive-grade qualification (AEC-Q101).

Group 2: Automotive-Grade Equivalent (Vishay GSOT24C-HE3-18) The GSOT24C-HE3-18 maintains identical electrical parameters to the main part but is qualified to AEC-Q101 automotive standards. Packaging differs (Cut Tape vs. Tape & Reel) with significantly higher inventory availability (76,415 units).

Group 3: Cross-Manufacturer Substitute (Littelfuse SM24-02HTG) The SM24-02HTG from Littelfuse is a manufacturer-recommended substitute with equivalent reverse standoff voltage (24V) and peak pulse current (5A). The clamping voltage differs at 42V maximum versus 47V for the Vishay part. This part is automotive-qualified (AEC-Q101) with higher power dissipation capability (400W vs. 235W) and operates across -40°C to 150°C.

Substitution Criteria:

Reverse standoff voltage: 24V (Max)
Peak pulse current: 5A (8/20µs)
Package compatibility: SOT-23-3 surface mount
Clamping voltage tolerance: 42V–47V range
RoHS3 compliance required
Operating temperature range: minimum -40°C to 150°C

Parameter Comparison

Parameter	GSOT24C-E3-18	GSOT24C-E3-08	GSOT24C-G3-08	GSOT24C-HE3-08	GSOT24C-HE3-18	SM24-02HTG
Manufacturer	Vishay	Vishay	Vishay	Vishay	Vishay	Littelfuse
Voltage - Reverse Standoff (Typ)	24V	24V	24V	24V	24V	24V
Voltage - Breakdown (Min)	27V	27V	27V	27V	27V	—
Voltage - Clamping (Max) @ Ipp	47V	47V	47V	47V	47V	42V
Current - Peak Pulse (10/1000µs)	5A	5A	5A	5A	5A	5A
Power - Peak Pulse	235W	235W	235W	235W	235W	400W
Capacitance @ Frequency	65pF @ 1MHz	65pF @ 1MHz	65pF @ 1MHz	65pF @ 1MHz	65pF @ 1MHz	65pF @ 1MHz
Operating Temperature	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-40°C ~ 150°C
Package / Case	SOT-23-3	SOT-23-3	SOT-23-3	SOT-23-3	SOT-23-3	SOT-23-3
Packaging Format	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)	Tape & Reel (TR)	Cut Tape (CT)	Tape & Reel (TR)
Automotive Grade	—	—	—	AEC-Q101	AEC-Q101	AEC-Q101
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Inventory (Pcs)	1,104	2,208	1,689	1,900	76,415	32,100

Engineering Selection Recommendations

For General-Purpose Applications (Non-Automotive): The GSOT24C-E3-08 and GSOT24C-G3-08 are direct electrical equivalents to the GSOT24C-E3-18. Selection between these parts depends on packaging requirements: Cut Tape format for lower-volume assembly or Tape & Reel for automated pick-and-place operations. All three maintain identical electrical performance and RoHS3 compliance.

For Automotive Applications: The GSOT24C-HE3-08 and GSOT24C-HE3-18 are qualified to AEC-Q101 automotive standards and are suitable for automotive-grade circuit protection. The GSOT24C-HE3-18 offers significantly higher inventory availability (76,415 units) compared to the GSOT24C-HE3-08 (1,900 units), making it preferable for high-volume production.

For Cross-Manufacturer Substitution: The Littelfuse SM24-02HTG is a manufacturer-recommended alternative with equivalent standoff and peak pulse specifications. The 42V clamping voltage is 5V lower than the Vishay 47V specification, which may be acceptable depending on circuit margin requirements. This part offers higher power dissipation (400W vs. 235W) and is AEC-Q101 qualified. The operating temperature range is -40°C to 150°C, which is narrower at the low end compared to the Vishay -55°C specification.

Compliance Considerations: All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility across applications.

Frequently Asked Questions (FAQ)

Q: Can GSOT24C-E3-08 be used as a direct replacement for GSOT24C-E3-18? A: Yes. Both parts are electrically identical with 24V reverse standoff voltage, 47V clamping voltage, and 5A peak pulse current. The difference is packaging format: GSOT24C-E3-08 is supplied in Cut Tape and Digi-Reel formats, while GSOT24C-E3-18 is Tape & Reel. Circuit performance is unaffected.

Q: What is the difference between standard and automotive-grade variants? A: Automotive-grade variants (GSOT24C-HE3-08 and GSOT24C-HE3-18) are qualified to AEC-Q101 standards, ensuring compliance with automotive reliability and qualification requirements. Electrical specifications remain identical to non-automotive versions. Use automotive-grade parts for automotive applications.

Q: Is the Littelfuse SM24-02HTG a suitable substitute? A: The SM24-02HTG is a manufacturer-recommended substitute with equivalent 24V standoff voltage and 5A peak pulse current. The clamping voltage is 42V versus 47V for Vishay parts. This 5V difference may be acceptable depending on circuit protection margin requirements. The part is AEC-Q101 qualified and offers higher power dissipation (400W). Operating temperature range is -40°C to 150°C, which is narrower at the low end than the Vishay -55°C specification.

Q: Does packaging format affect electrical performance? A: No. Packaging format (Cut Tape, Digi-Reel, or Tape & Reel) affects only handling and assembly processes. Electrical specifications and circuit performance are identical across all packaging variants of the same part number base.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility.

Q: What inventory considerations should guide part selection? A: The GSOT24C-HE3-18 offers the highest inventory availability at 76,415 units, followed by SM24-02HTG at 32,100 units. For high-volume production, these parts provide better supply assurance. The GSOT24C-E3-18 has lower inventory (1,104 units), making it suitable for lower-volume applications or when specific packaging is required.

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