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GSOT05C-E3-18 Equivalent & Substitute Parts
Part Overview
The GSOT05C-E3-18 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates at 5V reverse standoff with a 16V maximum clamping voltage and 30A peak pulse current (8/20µs), designed for general-purpose transient protection applications. The part is active in production status with ROHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when electrical characteristics, package compatibility, and operational parameters align within acceptable tolerances for the intended application.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 5V (Max) | V |
| Voltage - Breakdown (Min) | 6V | V |
| Voltage - Clamping (Max) @ Ipp | 16V | V |
| Current - Peak Pulse (10/1000µs) | 30A (8/20µs) | A |
| Power - Peak Pulse | 480W | W |
| Capacitance @ Frequency | 260pF @ 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 GSOT05C-E3-18 is determined by the following critical parameters:
- Voltage - Reverse Standoff: 5V (Max)
- Voltage - Breakdown (Min): 6V
- Voltage - Clamping (Max) @ Ipp: 16V
- Current - Peak Pulse (10/1000µs): 30A (8/20µs)
- Power - Peak Pulse: 480W
- Package / Case: SOT-23-3
- Mounting Type: Surface Mount
- Operating Temperature Range: -55°C ~ 150°C (TJ)
Substitute parts are grouped into two categories:
Category 1: Direct Vishay Equivalents (Identical Electrical Specifications) Parts GSOT05C-E3-08, GSOT05C-G3-08, GSOT05C-G3-18, GSOT05C-HE3-08, and GSOT05C-HG3-08 share identical electrical characteristics with the main part. Differences exist only in packaging format (Cut Tape vs. Tape & Reel) and grade designation (standard vs. automotive-qualified). These parts maintain the same voltage ratings, current handling, and thermal specifications.
Category 2: Cross-Manufacturer Alternatives (Comparable Electrical Performance) Parts CDSOT23-T05C (Bourns Inc.) and SM05-02HTG (Littelfuse Inc.) provide functional equivalence with minor parameter variations. These alternatives maintain the 5V reverse standoff and SOT-23-3 package but differ in clamping voltage, peak pulse current, or capacitance characteristics.
Parameter Comparison
| Part Number | Manufacturer | Voltage - Reverse Standoff (Typ) | Voltage - Clamping (Max) @ Ipp | Current - Peak Pulse (8/20µs) | Power - Peak Pulse | Capacitance @ 1MHz | Operating Temperature | Package | Channels |
|---|---|---|---|---|---|---|---|---|---|
| GSOT05C-E3-18 | Vishay | 5V (Max) | 16V | 30A | 480W | 260pF | -55°C ~ 150°C | SOT-23-3 | 2 (Unidirectional) |
| GSOT05C-E3-08 | Vishay | 5V (Max) | 16V | 30A | 480W | 260pF | -55°C ~ 150°C | SOT-23-3 | 2 (Unidirectional) |
| GSOT05C-G3-08 | Vishay | 5V (Max) | 16V | 30A | 480W | 260pF | -55°C ~ 150°C | SOT-23-3 | 2 (Unidirectional) |
| GSOT05C-G3-18 | Vishay | 5V (Max) | 16V | 30A | 480W | 260pF | -55°C ~ 150°C | SOT-23-3 | 2 (Unidirectional) |
| GSOT05C-HE3-08 | Vishay | 5V (Max) | 16V | 30A | 480W | 260pF | -55°C ~ 150°C | SOT-23-3 | 2 (Unidirectional) |
| GSOT05C-HG3-08 | Vishay | 5V (Max) | 16V | 30A | 480W | 260pF | -55°C ~ 150°C | SOT-23-3 | 2 (Unidirectional) |
| CDSOT23-T05C | Bourns Inc. | 5V | 14.6V | 42A | 500W | 210pF | -55°C ~ 150°C | SOT-23-3 | 1 (Bidirectional) |
| SM05-02HTG | Littelfuse Inc. | 5V (Max) | 13V | 10A | 400W | 400pF | -40°C ~ 150°C | SOT-23-3 | 2 (Unidirectional) |
Engineering Selection Recommendations
Direct Substitution (Vishay GSOT05C Series)
The Vishay parts GSOT05C-E3-08, GSOT05C-G3-08, GSOT05C-G3-18, GSOT05C-HE3-08, and GSOT05C-HG3-08 are electrically and functionally identical to GSOT05C-E3-18. Selection among these variants depends on packaging requirements and application grade:
- GSOT05C-E3-08 and GSOT05C-G3-08: Standard grade, Cut Tape or Digi-Reel packaging
- GSOT05C-G3-18: Standard grade, Tape & Reel packaging
- GSOT05C-HE3-08 and GSOT05C-HG3-08: Automotive-qualified (AEC-Q101), Tape & Reel packaging
All Vishay variants maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).
Cross-Manufacturer Alternatives
CDSOT23-T05C (Bourns Inc.) provides higher peak pulse current (42A vs. 30A) and power dissipation (500W vs. 480W) with lower clamping voltage (14.6V vs. 16V). This part is bidirectional, whereas GSOT05C-E3-18 is unidirectional. Use this alternative only when application requirements permit bidirectional protection and lower clamping voltage.
SM05-02HTG (Littelfuse Inc.) is automotive-qualified (AEC-Q101) with unidirectional configuration matching GSOT05C-E3-18. However, it exhibits reduced peak pulse current (10A vs. 30A) and power dissipation (400W vs. 480W), with higher capacitance (400pF vs. 260pF) and narrower operating temperature range (-40°C to 150°C vs. -55°C to 150°C). This part is suitable only for applications with lower transient current requirements.
Frequently Asked Questions (FAQ)
Q: Can GSOT05C-E3-08 replace GSOT05C-E3-18 directly?
A: Yes. Both parts are electrically identical with the same voltage ratings (5V reverse standoff, 16V clamping), current handling (30A peak pulse), and thermal specifications (-55°C to 150°C). The difference is packaging format: -08 indicates Cut Tape or Digi-Reel, while -18 indicates Tape & Reel. PCB assembly compatibility depends on your manufacturing equipment.
Q: What is the difference between standard and automotive-qualified variants?
A: GSOT05C-HE3-08 and GSOT05C-HG3-08 carry AEC-Q101 automotive qualification, indicating compliance with automotive reliability standards. Standard variants (GSOT05C-E3-08, GSOT05C-G3-08) lack this certification. Select automotive-qualified parts only if your application requires automotive-grade components.
Q: Why does CDSOT23-T05C have different electrical parameters?
A: CDSOT23-T05C is manufactured by Bourns Inc. using different design topology. It provides higher peak pulse current (42A) and lower clamping voltage (14.6V) but operates as a bidirectional device rather than unidirectional. This alternative is suitable only when application requirements permit these parameter variations.
Q: Is SM05-02HTG suitable as a direct replacement?
A: SM05-02HTG is not a direct replacement due to significantly lower peak pulse current (10A vs. 30A) and power dissipation (400W vs. 480W). Use this part only in applications with reduced transient current requirements. The narrower operating temperature range (-40°C minimum vs. -55°C) may also be limiting for some environments.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All listed substitute parts maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), matching the environmental compliance profile of GSOT05C-E3-18.
Q: What determines whether a part can substitute for GSOT05C-E3-18?
A: Substitution eligibility is determined by matching the following parameters: 5V reverse standoff voltage, 6V minimum breakdown voltage, SOT-23-3 package, surface mount configuration, and operating temperature range of -55°C to 150°C. Peak pulse current, clamping voltage, and power dissipation must meet or exceed application requirements. Channel configuration (unidirectional vs. bidirectional) must align with circuit topology.
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