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T3V3S5-7 Transient Voltage Suppressor Equivalent & Substitute Parts
Part Overview
The T3V3S5-7 is a unidirectional Zener-type transient voltage suppressor (TVS) diode manufactured by Diodes Incorporated in SOD-523 surface mount package. This component is rated for 3.3V reverse standoff voltage with 16V maximum clamping voltage at peak pulse current of 16A (8/20µs), delivering 220W peak pulse power for general-purpose surge protection applications.
The T3V3S5-7 carries an obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this component.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Manufacturer Part Number | T3V3S5-7 | — |
| Manufacturer | Diodes Incorporated | — |
| Category | Transient Voltage Suppressors (TVS) | — |
| Type | Zener, Unidirectional | — |
| Package / Case | SC-79, SOD-523 | — |
| Voltage - Reverse Standoff (Typ) | 3.3 | V |
| Voltage - Breakdown (Min) | 5 | V |
| Voltage - Clamping (Max) @ Ipp | 16 | V |
| Current - Peak Pulse (8/20µs) | 16 | A |
| Power - Peak Pulse | 220 | W |
| Capacitance @ 1MHz | 85 | pF |
| Operating Temperature Range | -65 to 150 | °C (TJ) |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution eligibility for the T3V3S5-7 is determined by the following critical parameters:
Primary Matching Criteria:
- Reverse standoff voltage: 3.3V nominal
- Package type: SOD-523 surface mount
- Unidirectional Zener configuration
- RoHS3 compliance and MSL Level 1
Secondary Compatibility Parameters:
- Voltage breakdown minimum: 5V or higher
- Clamping voltage: 16V or lower (to maintain protection threshold)
- Peak pulse current: 16A or higher (to handle specified surge levels)
- Peak pulse power: 200W or higher
Substitute parts are grouped into two categories based on electrical performance alignment:
Category A - Full Performance Equivalents: Parts matching or exceeding all electrical parameters of the T3V3S5-7, including clamping voltage ≤16V and peak pulse current ≥16A.
Category B - Reduced Performance Alternatives: Parts with lower peak pulse current (5A) or higher clamping voltage (>16V), suitable only for applications with reduced surge requirements or where clamping voltage tolerance permits.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Product Status | Voltage - Reverse Standoff (Typ) | Voltage - Breakdown (Min) | Voltage - Clamping (Max) @ Ipp | Current - Peak Pulse (8/20µs) | Power - Peak Pulse | Capacitance @ 1MHz | Operating Temperature | Package |
|---|---|---|---|---|---|---|---|---|---|---|
| T3V3S5-7 | Diodes Incorporated | Obsolete | 3.3V | 5V | 16V | 16A | 220W | 85pF | -65 to 150°C | SOD-523 |
| T3V3S5A-7 | Diodes Incorporated | Active | 3.3V | 5V | 13.7V | 16A | 220W | 125pF | -65 to 150°C | SOD-523 |
| CPDH3V3UP | Comchip Technology | Active | 3.3V (Max) | — | 8V | 5A | 40W | 12pF | -55 to 125°C | SOD-523 |
| CPDH3V3UP-HF | Comchip Technology | Active | 3.3V | — | 8V | 5A | 40W | 12pF | -55 to 125°C | SOD-523 |
| CPDH5V0U | Comchip Technology | Active | 5V | 6V | 12.5V | 16A | 200W | 90pF | — | SOD-523 |
| ESD5Z3.3T1G | onsemi | Active | 3.3V (Max) | 5V | 14.1V | 11.2A | 158W | 105pF | -55 to 150°C | SOD-523 |
| ESD7351XV2T1G | onsemi | Active | 3.3V (Max) | 5V | — | — | — | 0.43pF | -55 to 150°C | SOD-523 |
| ESD8351XV2T1G | onsemi | Active | 3.3V (Max) | 5.5V | 11.2V | 5A | — | 0.4pF | -55 to 125°C | SOD-523 |
| PESD3V3L1UB,115 | Nexperia USA Inc. | Active | 3.3V (Max) | 5.3V | 11V | 4.5A | 45W | 34pF | -55 to 150°C | SOD-523 |
| PESD3V3S1UB,115 | Nexperia USA Inc. | Active | 3.3V (Max) | 5.2V | 20V | 18A | 330W | 207pF | -65 to 150°C | SOD-523 |
| PESD3V3U1UB,115 | Nexperia USA Inc. | Active | 3.3V (Max) | 4.5V | — | — | — | 2.6pF | -55 to 150°C | SOD-523 |
Engineering Selection Recommendations
Recommended Primary Substitute: T3V3S5A-7 (Diodes Incorporated)
The T3V3S5A-7 is the manufacturer-recommended direct replacement. It maintains identical reverse standoff voltage (3.3V), breakdown voltage (5V minimum), peak pulse current (16A), and peak pulse power (220W) as the obsolete T3V3S5-7. The clamping voltage is reduced from 16V to 13.7V, providing improved protection margin. Both parts are ROHS3 compliant with MSL Level 1 rating and operate across -65°C to 150°C. This part is currently in active production status with 684 units in stock.
Alternative Equivalent: PESD3V3S1UB,115 (Nexperia USA Inc.)
The PESD3V3S1UB,115 exceeds the electrical performance of the T3V3S5-7 with 18A peak pulse current and 330W peak pulse power, while maintaining 3.3V reverse standoff voltage and 5.2V minimum breakdown voltage. The 20V clamping voltage is higher than the original part, requiring verification that the application tolerates this threshold. This part carries automotive-grade qualification (AEC-Q100) and operates across -65°C to 150°C. It is ROHS3 compliant with MSL Level 1.
Alternative Equivalent: ESD5Z3.3T1G (onsemi)
The ESD5Z3.3T1G provides close electrical alignment with 3.3V reverse standoff voltage, 5V minimum breakdown voltage, and 14.1V clamping voltage. Peak pulse current is 11.2A with 158W peak pulse power, representing a reduction from the original 16A/220W specification. This part is suitable for applications where the reduced surge capacity is acceptable. Operating temperature range extends to -55°C to 150°C. ROHS3 compliant with MSL Level 1.
Reduced Performance Alternatives:
The CPDH3V3UP, CPDH3V3UP-HF, ESD8351XV2T1G, and PESD3V3L1UB,115 are suitable only for applications with lower surge requirements. These parts are rated for 5A peak pulse current (versus 16A in the original), limiting their use to lower-energy transient events. Selection of these parts requires confirmation that application surge levels do not exceed their rated capacity.
The CPDH5V0U carries a 5V reverse standoff voltage, making it unsuitable for 3.3V protection circuits without circuit redesign.
Frequently Asked Questions (FAQ)
Q: Can the T3V3S5A-7 be used as a direct drop-in replacement for the T3V3S5-7?
A: Yes. The T3V3S5A-7 is the manufacturer-recommended equivalent with identical package (SOD-523), reverse standoff voltage (3.3V), breakdown voltage (5V minimum), and peak pulse current (16A). The reduced clamping voltage (13.7V versus 16V) provides enhanced protection. Both parts are ROHS3 compliant with MSL Level 1 and operate across -65°C to 150°C.
Q: What is the significance of clamping voltage in TVS diode selection?
A: Clamping voltage determines the maximum voltage the TVS diode allows across the protected circuit during a transient event. Lower clamping voltage provides better protection but requires verification that the protected component can tolerate this voltage. The T3V3S5-7 specifies 16V maximum clamping; substitutes with lower clamping voltage (such as T3V3S5A-7 at 13.7V) offer improved protection margins.
Q: Are parts with reduced peak pulse current (5A) suitable replacements?
A: Parts such as CPDH3V3UP, CPDH3V3UP-HF, ESD8351XV2T1G, and PESD3V3L1UB,115 rated for 5A peak pulse current can only substitute the T3V3S5-7 if the application surge levels do not exceed 5A. The original part is rated for 16A; using a 5A-rated part in a higher-energy environment will result in component failure. Application surge profile analysis is required before selecting these alternatives.
Q: What does MSL Level 1 mean for component handling?
A: MSL (Moisture Sensitivity Level) 1 indicates unlimited shelf life without moisture-control packaging requirements. All listed substitute parts carry MSL Level 1, eliminating special storage or handling procedures compared to higher MSL ratings.
Q: Can PESD3V3S1UB,115 be used despite its 20V clamping voltage?
A: The PESD3V3S1UB,115 exceeds the original part's electrical performance with 18A peak pulse current and 330W peak pulse power. However, the 20V clamping voltage is 4V higher than the T3V3S5-7 specification. This part is suitable only if the protected circuit can tolerate 20V transient voltage without damage. Automotive-grade qualification (AEC-Q100) and extended temperature range (-65°C to 150°C) make this part suitable for demanding applications where the higher clamping voltage is acceptable.
Q: Why do some substitute parts show missing electrical parameters?
A: Parts such as ESD7351XV2T1G and PESD3V3U1UB,115 are optimized for specific applications (RF antenna and general purpose, respectively) where certain parameters are not specified by the manufacturer. ESD7351XV2T1G shows extremely low capacitance (0.43pF), indicating RF-specific design. These parts should not be selected as general-purpose replacements without confirming application compatibility.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All listed substitute parts carry ROHS3 compliance status, meeting environmental and regulatory requirements equivalent to the obsolete T3V3S5-7.
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