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SMCJ15A-M3/57T Equivalent & Substitute Parts
Part Overview
The SMCJ15A-M3/57T is a unidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 15V reverse standoff category and provides transient protection for general-purpose applications. The part is Active status and ROHS3 compliant, making it suitable for modern electronic designs requiring ESD and surge protection.
Substitute parts are necessary when the original manufacturer part becomes unavailable, when alternative packaging formats are required for production efficiency, or when equivalent electrical performance from alternative manufacturers meets design specifications.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 15 | V |
| Voltage - Breakdown (Min) | 16.7 | V |
| Voltage - Clamping (Max) @ Ipp | 24.4 | V |
| Current - Peak Pulse (10/1000µs) | 61.5 | A |
| Power - Peak Pulse | 1500 | W |
| Operating Temperature Range | -55 to 150 | °C |
| Mounting Type | Surface Mount | - |
| Package / Case | DO-214AB, SMC | - |
| Type | Zener | - |
| Unidirectional Channels | 1 | - |
| RoHS Status | ROHS3 Compliant | - |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | - |
Substitute Part Grouping Explanation
Substitution of the SMCJ15A-M3/57T is determined by strict equivalence across the following critical parameters:
- Voltage - Reverse Standoff (Typ): 15V
- Voltage - Breakdown (Min): 16.7V
- Voltage - Clamping (Max) @ Ipp: 24.4V
- Current - Peak Pulse (10/1000µs): 61.5A
- Unidirectional Channels: 1
- Type: Zener
- Mounting Type: Surface Mount
- Package / Case: DO-214AB, SMC
Substitute parts are grouped into two categories:
Category A - Direct Electrical & Mechanical Equivalents (Identical Parameters): Parts that maintain all critical electrical parameters and the same DO-214AB SMC package footprint. These parts differ only in packaging format (Tape & Reel vs. Cut Tape) or manufacturer designation.
Category B - Functional Equivalents with Parameter Variations: Parts that maintain the core 15V reverse standoff voltage and unidirectional channel configuration but may differ in clamping voltage, peak pulse current, power dissipation, or operating temperature range. These require design verification for specific application constraints.
Parameter Comparison
| Part Number | Manufacturer | Voltage - Reverse Standoff (V) | Voltage - Clamping (Max) @ Ipp (V) | Current - Peak Pulse (A) | Power - Peak Pulse (W) | Operating Temp (°C) | Package | Packaging Format |
|---|---|---|---|---|---|---|---|---|
| SMCJ15A-M3/57T | Vishay | 15 | 24.4 | 61.5 | 1500 | -55 to 150 | DO-214AB, SMC | Tape & Reel (TR) |
| SMCJ15A-E3/57T | Vishay | 15 | 24.4 | 61.5 | 1500 | -55 to 150 | DO-214AB, SMC | Cut Tape (CT) |
| 1SMC15A TR13 PBFREE | Central Semiconductor Corp | 15 | 24.4 | 61.5 | 1500 | -65 to 150 | DO-214AB, SMC | Tape & Reel (TR) |
| SMCJ15A | EVVO Semi | 15 | 24.4 | 61.5 | 600 | -65 to 150 | DO-214AC, SMA | Cut Tape (CT) & Digi-Reel® |
| SMCJ15A-13-F | Diodes Incorporated | 15 | 24.4 | 61.5 | 1500 | -55 to 150 | DO-214AB, SMC | Cut Tape (CT) & Digi-Reel® |
| SMCJ15A-TP | Micro Commercial Co | 15 | 24.4 | 61.5 | 1500 | -55 to 175 | DO-214AB, SMC | Tape & Reel (TR) |
| SMCJ15A-TR | STMicroelectronics | 15 | 32.5 | 308 (8/20µs) | 1500 | -55 to 150 | DO-214AB, SMC | Tape & Reel (TR) |
| SMDJ15A | Alpha & Omega Semiconductor Inc. | 15 | 24.4 | 123 | 3000 | -55 to 150 | DO-214AB, SMC | Tape & Reel (TR) |
Engineering Selection Recommendations
Primary Substitutes (Category A - Direct Equivalents):
SMCJ15A-E3/57T, 1SMC15A TR13 PBFREE, SMCJ15A-13-F, and SMCJ15A-TP are direct functional equivalents to the SMCJ15A-M3/57T. All maintain identical electrical parameters (15V reverse standoff, 24.4V clamping, 61.5A peak pulse current, 1500W peak power) and the DO-214AB SMC package footprint. Selection among these parts depends on packaging format availability and manufacturing lead times. All are ROHS3 compliant with MSL 1 rating.
Secondary Substitutes (Category B - Functional Equivalents with Variations):
SMCJ15A (EVVO Semi) maintains electrical equivalence but differs in package designation (DO-214AC SMA vs. DO-214AB SMC) and reduced peak power rating (600W vs. 1500W). This part is suitable only for applications where the lower power dissipation rating does not exceed design requirements.
SMCJ15A-TR (STMicroelectronics) maintains the 15V reverse standoff voltage and 1500W peak power but exhibits higher clamping voltage (32.5V vs. 24.4V) and significantly higher peak pulse current (308A at 8/20µs vs. 61.5A at 10/1000µs). This part is not interchangeable without circuit redesign verification.
SMDJ15A (Alpha & Omega Semiconductor Inc.) maintains electrical equivalence in voltage parameters but provides higher peak pulse current (123A vs. 61.5A) and peak power dissipation (3000W vs. 1500W). This part is suitable as a substitute where higher transient current handling is beneficial or required.
Frequently Asked Questions (FAQ)
Q: Can SMCJ15A-E3/57T replace SMCJ15A-M3/57T directly?
A: Yes. Both parts are manufactured by Vishay and maintain identical electrical specifications (15V reverse standoff, 24.4V clamping, 61.5A peak pulse current, 1500W peak power) and the same DO-214AB SMC package. The difference is packaging format: SMCJ15A-E3/57T is supplied in Cut Tape format while SMCJ15A-M3/57T is supplied in Tape & Reel format. PCB footprint and electrical performance are identical.
Q: What is the difference between DO-214AB and DO-214AC packages?
A: DO-214AB (SMC) and DO-214AC (SMA) are distinct surface mount package outlines with different physical dimensions and land patterns. Parts specified for DO-214AB cannot be substituted with DO-214AC variants without PCB redesign. The SMCJ15A from EVVO Semi uses DO-214AC and is not a direct substitute for the DO-214AB specified SMCJ15A-M3/57T.
Q: Is SMCJ15A-TR from STMicroelectronics a suitable substitute?
A: SMCJ15A-TR maintains the 15V reverse standoff voltage and DO-214AB SMC package but differs significantly in clamping voltage (32.5V vs. 24.4V) and peak pulse current specification (308A at 8/20µs vs. 61.5A at 10/1000µs). This part is not a direct substitute and requires circuit analysis to confirm compatibility with the original design intent.
Q: Can SMDJ15A replace SMCJ15A-M3/57T?
A: SMDJ15A maintains the 15V reverse standoff voltage, 24.4V clamping voltage, and DO-214AB SMC package but provides higher peak pulse current (123A vs. 61.5A) and peak power dissipation (3000W vs. 1500W). This part is electrically compatible and offers enhanced transient protection capability. Substitution is valid for applications where the higher performance does not create thermal or circuit interaction issues.
Q: Are all substitute parts ROHS3 compliant?
A: All listed substitute parts are ROHS3 compliant. All carry MSL 1 (Unlimited) moisture sensitivity rating, indicating no special moisture control requirements during storage or handling.
Q: What is the temperature range difference between substitutes?
A: Most substitutes operate across -55°C to 150°C. The 1SMC15A TR13 PBFREE and SMCJ15A (EVVO Semi) extend the lower operating limit to -65°C. SMCJ15A-TP extends the upper limit to 175°C. These differences are significant only for applications operating at temperature extremes beyond the original -55°C to 150°C specification.
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