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SMCJ64A-M3/9AT Equivalent & Substitute Parts
Part Overview
The SMCJ64A-M3/9AT is a unidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 64V reverse standoff voltage class with a 103V maximum clamping voltage and 14.6A peak pulse current rating. The device is designed for general-purpose transient protection 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 maintain identical or functionally compatible electrical characteristics within the specified parameter tolerances for this product category, ensuring direct circuit board compatibility without design modification.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 64 | V |
| Voltage - Breakdown (Min) | 71.1 | V |
| Voltage - Clamping (Max) @ Ipp | 103 | V |
| Current - Peak Pulse (10/1000µs) | 14.6 | A |
| Power - Peak Pulse | 1500 | W |
| Package / Case | DO-214AB, SMC | — |
| Mounting Type | Surface Mount | — |
| Operating Temperature Range | -55°C to 150°C | TJ |
| Type | Zener | — |
| Unidirectional Channels | 1 | — |
| RoHS Status | ROHS3 Compliant | — |
Substitute Part Grouping Explanation
Substitute parts for the SMCJ64A-M3/9AT are classified into two categories based on electrical and mechanical compatibility:
Direct Equivalents (Same Electrical Rating): Parts maintaining identical voltage standoff (64V), breakdown voltage (71.1V minimum), clamping voltage (103V maximum), and peak pulse current (14.6A) specifications. These parts are pin-compatible and functionally interchangeable in the DO-214AB (SMC) package. Direct equivalents include SMCJ64A-E3/57T (Vishay), SMCJ64A (Meritek), SMCJ64A-13-F (Diodes Incorporated), and SMCJ64A-TP (Micro Commercial Co).
Higher Power Rated Alternatives (Uprated Specifications): Parts with identical voltage parameters but increased peak pulse current and power dissipation ratings. These components provide enhanced transient protection capability while maintaining the same clamping voltage and standoff voltage characteristics. This category includes SMDJ64A (3000W, 29.2A), 5.0SMDJ64A (5000W, 48.6A), and 5.0SMDJ64A-T7 (5000W, 48.6A).
Substitution eligibility is determined by: (1) matching voltage class (64V standoff, 71.1V breakdown minimum, 103V clamping maximum), (2) compatible or superior peak pulse current rating, (3) identical or superior power dissipation capability, (4) DO-214AB (SMC) package compatibility, and (5) surface mount configuration.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Voltage - Reverse Standoff (V) | Voltage - Breakdown Min (V) | Voltage - Clamping Max (V) | Current - Peak Pulse (A) | Power - Peak Pulse (W) | Package | Operating Temp (°C) | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|
| SMCJ64A-M3/9AT | Vishay | 64 | 71.1 | 103 | 14.6 | 1500 | DO-214AB, SMC | -55 to 150 | ROHS3 |
| SMCJ64A-E3/57T | Vishay | 64 | 71.1 | 103 | 14.6 | 1500 | DO-214AB, SMC | -55 to 150 | ROHS3 |
| SMCJ64A | Meritek | 64 | 71.1 | 103 | 14.56 | 1500 | DO-214AB, SMC | -55 to 150 | ROHS3 |
| SMCJ64A-13-F | Diodes Incorporated | 64 | 71.1 | 103 | 14.6 | 1500 | DO-214AB, SMC | -55 to 150 | ROHS3 |
| SMCJ64A-TP | Micro Commercial Co | 64 | 71.1 | 103 | 14.6 | 1500 | DO-214AB, SMC | -55 to 175 | ROHS3 |
| SMDJ64A | Alpha & Omega Semiconductor | 64 | 71.1 | 103 | 29.2 | 3000 | DO-214AB, SMC | -55 to 150 | ROHS3 |
| 5.0SMDJ64A | Taiwan Semiconductor Corporation | 64 | 71.1 | 103 | 48.6 | 5000 | DO-214AB, SMC | -55 to 175 | ROHS3 |
| 5.0SMDJ64A-T7 | Littelfuse Inc. | 64 | 71.1 | 103 | 48.6 | 5000 | DO-214AB, SMC | -65 to 150 | ROHS3 |
Engineering Selection Recommendations
All listed substitute parts maintain active product status and RoHS3 compliance, meeting regulatory requirements for current applications. Direct equivalent parts (SMCJ64A-E3/57T, SMCJ64A from Meritek, SMCJ64A-13-F, and SMCJ64A-TP) provide identical electrical performance and are suitable for one-to-one replacement in existing designs without circuit modification.
Higher power-rated alternatives (SMDJ64A, 5.0SMDJ64A, 5.0SMDJ64A-T7) offer increased transient suppression capability while maintaining voltage compatibility. These uprated devices are appropriate for applications requiring enhanced protection margins or where circuit board thermal management permits higher power dissipation.
Temperature range considerations: SMCJ64A-TP and 5.0SMDJ64A extend the upper operating limit to 175°C, while 5.0SMDJ64A-T7 extends the lower limit to -65°C. Selection should align with application thermal requirements and environmental specifications.
Frequently Asked Questions (FAQ)
Q: Can SMCJ64A-E3/57T directly replace SMCJ64A-M3/9AT?
A: Yes. Both parts share identical voltage ratings (64V standoff, 71.1V breakdown, 103V clamping), peak pulse current (14.6A), power dissipation (1500W), package configuration (DO-214AB, SMC), and operating temperature range (-55°C to 150°C). The parts are functionally equivalent and pin-compatible.
Q: What is the difference between SMCJ64A and SMDJ64A?
A: Both maintain the same voltage class (64V standoff, 103V clamping) and package (DO-214AB, SMC). The SMDJ64A provides higher peak pulse current (29.2A versus 14.6A) and power dissipation (3000W versus 1500W), making it suitable for applications requiring greater transient protection capability.
Q: Can I use 5.0SMDJ64A-T7 in place of SMCJ64A-M3/9AT?
A: Yes, with consideration for application requirements. The 5.0SMDJ64A-T7 maintains identical voltage parameters and package compatibility but provides significantly higher peak pulse current (48.6A) and power dissipation (5000W). This uprated device is suitable for applications where enhanced transient suppression is beneficial. The extended lower temperature limit (-65°C) provides additional environmental flexibility.
Q: Are all substitute parts available in the same packaging?
A: All listed substitute parts use the DO-214AB (SMC) surface mount package, ensuring mechanical and electrical compatibility with the original SMCJ64A-M3/9AT footprint.
Q: Do all substitute parts meet RoHS3 compliance?
A: Yes. All listed substitute parts carry RoHS3 compliance certification, meeting current regulatory requirements for electronic component manufacturing and use.
Q: What determines whether a part is a suitable substitute?
A: Substitution eligibility is based on: (1) identical or compatible voltage ratings (64V standoff minimum, 71.1V breakdown minimum, 103V clamping maximum), (2) equal or superior peak pulse current capability, (3) equal or superior power dissipation rating, (4) identical DO-214AB (SMC) package, (5) surface mount configuration, and (6) active product status with current compliance certifications.
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