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P4SMA33A-M3/61 Equivalent & Substitute Parts
Part Overview
The P4SMA33A-M3/61 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 28.2V reverse standoff voltage range with a 45.7V maximum clamping voltage and 8.8A peak pulse current rating. The part is Active status and RoHS3 compliant, designed for general purpose transient voltage suppression applications. Equivalent and substitute parts are identified based on matching electrical characteristics, package compatibility, and operational parameters.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Voltage - Reverse Standoff (Typ) | 28.2V |
| Voltage - Breakdown (Min) | 31.4V |
| Voltage - Clamping (Max) @ Ipp | 45.7V |
| Current - Peak Pulse (10/1000µs) | 8.8A |
| Power - Peak Pulse | 400W |
| Package / Case | DO-214AC, SMA |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -65°C ~ 150°C (TJ) |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the P4SMA33A-M3/61 are grouped based on the following substitution criteria:
Group 1 - Direct Electrical & Packaging Equivalents: Parts maintaining identical reverse standoff voltage (28.2V), clamping voltage (45.7V), and DO-214AC/SMA package compatibility. Peak pulse current may vary within acceptable operational limits (8.8A to 9A).
Group 2 - Voltage Variant: Parts with different reverse standoff voltage (33V) and clamping voltage (53.3V) specifications, representing a higher voltage rating alternative within the same package family.
The following parameters determine substitution eligibility:
- Reverse Standoff Voltage: 28.2V (primary criterion)
- Clamping Voltage: 45.7V (primary criterion)
- Package: DO-214AC/SMA (mandatory)
- Mounting Type: Surface Mount (mandatory)
- Peak Pulse Current: 8.8A minimum acceptable
Parameter Comparison
| Part Number | Manufacturer | Reverse Standoff (V) | Breakdown Min (V) | Clamping Max (V) | Peak Pulse Current (A) | Power - Peak Pulse (W) | Package | Operating Temp (°C) | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|
| P4SMA33A-M3/61 | Vishay | 28.2 | 31.4 | 45.7 | 8.8 | 400 | DO-214AC (SMA) | -65 ~ 150 | ROHS3 |
| P4SMA33A-E3/61 | Vishay | 28.2 | 31.4 | 45.7 | 8.8 | 400 | DO-214AC (SMA) | -65 ~ 150 | ROHS3 |
| P4SMA33A | Eaton | 28.2 | 31.4 | 45.7 | 9.0 | 400 | DO-214AC (SMA) | -55 ~ 150 | RoHS |
| P4SMA33AH | Taiwan Semiconductor | 28.2 | 31.4 | 45.7 | 9.0 | 400 | DO-214AC (SMA) | -55 ~ 150 | ROHS3 |
| SMAJ33A | MDD | 33.0 | 36.7 | 53.3 | 7.5 | 400 | DO-214AC (SMA) | -50 ~ 150 | ROHS3 |
Engineering Selection Recommendations
Direct Substitutes (Preferred): P4SMA33A-E3/61, P4SMA33A, and P4SMA33AH maintain the critical electrical parameters of 28.2V reverse standoff and 45.7V clamping voltage. These parts are functionally equivalent for applications requiring the original P4SMA33A-M3/61 specifications.
P4SMA33A-E3/61 is a Vishay part with identical specifications and ROHS3 compliance, differing only in packaging configuration (Tape & Reel variant).
P4SMA33A (Eaton) and P4SMA33AH (Taiwan Semiconductor) provide equivalent electrical performance with minor variations in peak pulse current (9.0A versus 8.8A) and operating temperature range. P4SMA33AH includes AEC-Q101 automotive qualification and is ROHS3 compliant.
Voltage Variant: SMAJ33A represents a higher voltage alternative with 33V reverse standoff and 53.3V clamping voltage. This part is suitable only for applications requiring higher voltage suppression levels and is not a direct substitute for the original specification.
Frequently Asked Questions (FAQ)
Q: Can P4SMA33A-E3/61 be used as a direct replacement for P4SMA33A-M3/61?
A: Yes. Both parts are manufactured by Vishay with identical electrical specifications (28.2V reverse standoff, 45.7V clamping voltage, 8.8A peak pulse current) and DO-214AC/SMA packaging. The difference is in packaging configuration (Tape & Reel variant designation).
Q: What is the difference between P4SMA33A (Eaton) and P4SMA33AH (Taiwan Semiconductor)?
A: Both maintain the core electrical specifications of 28.2V reverse standoff and 45.7V clamping voltage with 9.0A peak pulse current. P4SMA33AH includes AEC-Q101 automotive qualification and operates over -55°C to 150°C. P4SMA33A (Eaton) operates over -55°C to 150°C with standard RoHS compliance. Selection depends on application requirements and qualification needs.
Q: Is SMAJ33A a suitable substitute?
A: SMAJ33A is not a direct substitute. It operates at a higher voltage level (33V reverse standoff, 53.3V clamping) and lower peak pulse current (7.5A). Use SMAJ33A only when higher voltage suppression is required by the application circuit.
Q: Are all substitute parts available in the same package?
A: All listed parts use DO-214AC/SMA surface mount packaging, ensuring mechanical and footprint compatibility. Verify specific packaging variants (Tape & Reel, Cut Tape, Digi-Reel) with your supplier for procurement requirements.
Q: What compliance certifications apply to these parts?
A: P4SMA33A-M3/61, P4SMA33A-E3/61, and P4SMA33AH are ROHS3 compliant. P4SMA33A (Eaton) is RoHS compliant. All parts are REACH unaffected and classified as EAR99 for export control purposes.
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