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P6SMB75A-E3/5B Equivalent & Substitute Parts
Part Overview
The P6SMB75A-E3/5B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 64.1V reverse standoff range with a 103V maximum clamping voltage and 5.8A peak pulse current rating. The device is designed for general purpose transient voltage suppression applications and is currently in active production status with RoHS3 compliance and unlimited moisture sensitivity level (MSL 1).
Equivalent and substitute parts are identified when they share compatible electrical characteristics within the allowed parameter tolerances for TVS diodes in the DO-214AA (SMB) package category, maintaining functional interchangeability in circuit protection applications.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 64.1 | V |
| Voltage - Breakdown (Min) | 71.3 | V |
| Voltage - Clamping (Max) @ Ipp | 103 | V |
| Current - Peak Pulse (10/1000µs) | 5.8 | A |
| Power - Peak Pulse | 600 | W |
| Operating Temperature Range | -65°C to 150°C | TJ |
| Package / Case | DO-214AA, SMB | — |
| Type | Zener | — |
| Unidirectional Channels | 1 | — |
Substitute Part Grouping Explanation
Substitution eligibility for TVS diodes is determined by alignment across three critical parameter categories:
Voltage Parameters: Reverse standoff voltage (Typ), breakdown voltage (Min), and clamping voltage (Max) must fall within acceptable tolerance bands. Parts with identical or near-identical voltage ratings ensure equivalent transient suppression performance.
Current & Power Ratings: Peak pulse current (10/1000µs) and peak pulse power must meet or exceed the original specification to maintain adequate surge handling capacity.
Package & Mounting: All substitute parts must use the DO-214AA (SMB) surface mount package to ensure mechanical and electrical compatibility with existing PCB layouts.
Compliance & Temperature Range: RoHS status and operating temperature range determine suitability for specific regulatory and environmental requirements.
The substitute parts identified below are grouped into two categories: direct electrical equivalents (matching voltage and current parameters) and manufacturer-recommended alternatives (meeting functional requirements with minor parameter variations).
Parameter Comparison
| Part Number | Manufacturer | Voltage - Reverse Standoff (Typ) | Voltage - Breakdown (Min) | Voltage - Clamping (Max) @ Ipp | Current - Peak Pulse (10/1000µs) | Power - Peak Pulse | Operating Temperature | Package | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|
| P6SMB75A-E3/5B | Vishay General Semiconductor - Diodes Division | 64.1V | 71.3V | 103V | 5.8A | 600W | -65°C to 150°C | DO-214AA (SMB) | ROHS3 Compliant |
| SZP6SMB75AT3G | Littelfuse Inc. | 64.1V | 71.3V | 103V | 5.8A | 600W | -65°C to 150°C | DO-214AA (SMB) | ROHS3 Compliant |
| SMBJ64A | Meritek | 64V | 71.1V | 103V | 5.83A | 600W | -55°C to 150°C | DO-214AA (SMB) | ROHS3 Compliant |
| SM6T75AY | STMicroelectronics | 64.1V | 71.3V | 134V | 30A (8/20µs) | 600W | -55°C to 150°C | DO-214AA (SMB) | ROHS3 Compliant |
Engineering Selection Recommendations
Direct Electrical Equivalent: The SZP6SMB75AT3G (Littelfuse Inc.) provides identical electrical performance to the P6SMB75A-E3/5B across all critical parameters: 64.1V reverse standoff, 71.3V breakdown, 103V clamping, and 5.8A peak pulse current. Both devices maintain the same operating temperature range (-65°C to 150°C) and RoHS3 compliance status. This part is qualified to AEC-Q101 automotive standards, providing additional qualification assurance.
Functional Equivalent with Enhanced Performance: The SMBJ64A (Meritek) maintains voltage compatibility (64V standoff, 71.1V breakdown, 103V clamping) with marginally higher peak pulse current (5.83A). Operating temperature range is -55°C to 150°C, which is acceptable for most general purpose applications. RoHS3 compliance is maintained.
Higher Performance Alternative: The SM6T75AY (STMicroelectronics) shares the same voltage standoff and breakdown parameters (64.1V and 71.3V) but features elevated clamping voltage (134V) and significantly higher peak pulse current (30A at 8/20µs pulse width). This device is manufacturer-recommended and carries AEC-Q101 automotive qualification. Selection of this part is appropriate when enhanced transient suppression capability is required, though it introduces higher clamping voltage that must be verified against circuit requirements.
Not Recommended: The P6SMB75A (Eaton - Electronics Division) listed in the substitute data exhibits substantially different electrical characteristics (6.4V reverse standoff, 11.3V clamping, 54A peak pulse current) and is not functionally equivalent to the P6SMB75A-E3/5B despite the similar part number designation. This represents a different voltage class and is unsuitable as a direct substitute.
Frequently Asked Questions (FAQ)
Q: Can the SZP6SMB75AT3G be used as a direct replacement for the P6SMB75A-E3/5B?
A: Yes. The SZP6SMB75AT3G provides identical electrical specifications across all critical parameters: 64.1V reverse standoff voltage, 71.3V breakdown voltage, 103V clamping voltage, and 5.8A peak pulse current. Both devices operate across -65°C to 150°C and maintain RoHS3 compliance. The SZP6SMB75AT3G is packaged in DO-214AA (SMB) format and is suitable for direct PCB substitution.
Q: What is the difference between the SMBJ64A and the P6SMB75A-E3/5B?
A: The SMBJ64A maintains voltage compatibility with minimal deviation (64V vs. 64.1V standoff, 71.1V vs. 71.3V breakdown, identical 103V clamping). Peak pulse current is marginally higher (5.83A vs. 5.8A). The operating temperature range is -55°C to 150°C compared to -65°C to 150°C. Both use DO-214AA (SMB) packaging and are RoHS3 compliant. The SMBJ64A is suitable for applications where the lower temperature minimum (-55°C) is acceptable.
Q: Why is the SM6T75AY listed as a manufacturer-recommended alternative?
A: The SM6T75AY shares identical voltage standoff and breakdown parameters (64.1V and 71.3V) but provides enhanced transient suppression with higher clamping voltage (134V) and significantly greater peak pulse current (30A). This device is recommended when circuit protection requirements exceed the baseline 5.8A specification. The elevated clamping voltage must be verified against downstream component voltage ratings before selection.
Q: Can the P6SMB75A from Eaton be used as a substitute?
A: No. Despite the similar part number designation, the Eaton P6SMB75A operates in a different voltage class (6.4V standoff, 11.3V clamping, 54A peak pulse) and is not functionally equivalent to the Vishay P6SMB75A-E3/5B. These are distinct products serving different circuit protection requirements.
Q: Are all substitute parts available in the same package format?
A: Yes. All identified substitute parts use the DO-214AA (SMB) surface mount package, ensuring mechanical and electrical compatibility with existing PCB layouts designed for the P6SMB75A-E3/5B.
Q: What compliance certifications should I verify before selecting a substitute?
A: All identified substitute parts maintain RoHS3 compliance and unlimited moisture sensitivity level (MSL 1). The SZP6SMB75AT3G and SM6T75AY carry AEC-Q101 automotive qualification, providing additional assurance for applications requiring automotive-grade components. Verify compliance requirements against your specific application standards before final selection.
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