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Vishay General Semiconductor - Diodes Division SMCJ15A-M3/57T
- Part No.:
- SMCJ15A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ15A-M3/57T.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,243
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Product details
Overview
SMCJ15A-M3/57T from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 15 V standoff voltage (VWM), 24.4 V clamping voltage (VC) at 61.5 A peak pulse current (IPPM), and 1500 W peak pulse power (10/1000 µs waveform), commonly deployed on DC power rails and I/O lines in industrial motor drives and automotive ECUs.
For engineers reviewing the SMCJ15A-M3/57T datasheet, SMCJ15A-M3/57T pinout, SMCJ15A-M3/57T application, or SMCJ15A-M3/57T equivalent, key selection criteria include its 16.7–18.5 V breakdown voltage range (VBR), 1.0 µA max reverse leakage at VWM, halogen-free RoHS-compliant construction (M3 suffix), and AEC-Q101 qualification readiness via HM3 variant.
Technical Context
The SMCJ15A-M3/57T operates as a silicon avalanche diode with glass-passivated junction, delivering sub-nanosecond response to transients. Its unidirectional polarity-marked by cathode band-enables precise placement on positive-rail protection paths, while low incremental surge resistance ensures minimal voltage overshoot during high-current ESD or load-dump events.
Thermally, it sustains 150 °C maximum junction temperature with 75 °C/W junction-to-ambient thermal resistance (RθJA) on standard 8.0 mm × 8.0 mm copper pads. The device meets MSL Level 1 per J-STD-020 and supports reflow up to 260 °C peak, making it compatible with automated SMT assembly without derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff Voltage) | 15 V - Maximum continuous reverse voltage before clamping begins; sets operating margin above nominal 12 V rail. |
| VBR (Breakdown Voltage) | 16.7–18.5 V at 1.0 mA - Confirmed avalanche onset range; ensures reliable triggering before system damage threshold. |
| VC (Clamping Voltage) | 24.4 V at 61.5 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; stays below 28 V IC absolute max ratings. |
| PPPM (Peak Pulse Power) | 1500 W - Sustains high-energy transients like ISO 7637-2 Pulse 5a (load dump) without failure. |
| IPPM (Peak Pulse Current) | 61.5 A - Withstands 10/1000 µs surges typical of inductive switching in solenoid drivers and relay coils. |
| TJ max | 150 °C - Enables operation in under-hood automotive environments and enclosed industrial enclosures. |
| Leakage (ID) | ≤1.0 µA at 15 V - Negligible standby power loss; avoids battery drain in always-on systems. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant (M3 suffix), matte tin-plated leads solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-side connection point | Connected to protected line (e.g., +12 V rail); clamps to ground when voltage exceeds VBR. |
| Anode (non-banded end) | GND reference terminal | Must be tied directly to low-impedance system ground plane to ensure effective transient shunting. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMC package | Enables compact PCB layout in space-constrained modules such as automotive body control units and IoT sensor nodes. |
| Glass-passivated junction | Ensures stable VBR and long-term reliability across thermal cycling and humidity exposure per JESD22-A101. |
| 1500 W peak pulse rating | Provides single-event immunity to ISO 16750-2 load dump (up to 35 V, 100 ms) when used with series impedance. |
| MSL Level 1 rating | Eliminates pre-bake requirement for reflow assembly, reducing manufacturing cost and cycle time. |
| AEC-Q101-ready construction | M3 suffix shares same die and process as HM3 variants-supports qualification path for automotive applications. |
Applications
| Automotive Power Rail Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 12 V supply inputs in engine control units against ISO 7637-2 Pulse 5a (load dump) and Pulse 1 (inductive kick). IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and upstream fuse, clamping transients before they reach PMICs and microcontrollers. Use Value: Limits voltage to ≤24.4 V during 61.5 A surges, preventing latch-up or gate oxide rupture in downstream 28 V-tolerant ICs. | Use Scenario: Shielding digital input channels of programmable logic controllers from field-wiring induced surges (IEC 61000-4-5, 2 kV). IC Role / Device Role / Timing Role: Front-end transient suppressor on optocoupler input side, absorbing energy before signal conditioning circuitry. Use Value: Maintains <1 µA leakage at 15 V, avoiding false triggering of 24 V DC input thresholds while surviving repeated 1.5 kV surges. |
| Consumer Appliance Motor Drive | Telecom Power Interface |
Use Scenario: Safeguarding H-bridge gate drivers in smart home washing machine inverters from back-EMF spikes during brushless motor commutation. IC Role / Device Role / Timing Role: Localized TVS mounted adjacent to half-bridge MOSFETs, referenced to local ground plane. Use Value: Sub-ns response captures fast-edge transients (<50 ns rise time), limiting VDS overshoot to safe levels for 60 V-rated FETs. | Use Scenario: Protecting 48 V PoE-powered equipment front-ends from lightning-induced surges on Ethernet cable pairs. IC Role / Device Role / Timing Role: Primary-level TVS on DC input stage, coordinated with secondary-side TVS and common-mode chokes. Use Value: 1500 W rating handles partial energy from IEC 61000-4-5 Combination Wave (10/700 µs) without degradation over 1000+ events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A-E3/52T | Lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W), same VWM/VC. | Suitable only for lower-energy transients (e.g., ESD-only); not rated for load dump. | Select when board space is critical and surge threat level is limited to IEC 61000-4-2. |
| SMCJ15CA-M3/57T | Bidirectional version; identical VWM, VBR, VC, and PPPM, but symmetric clamping in both polarities. | Required for AC-coupled or floating signal lines (e.g., RS-485, CAN bus) where polarity reversal occurs. | Choose when protecting bidirectional data lines or ungrounded power domains. |
Compared with SMAJ15A-E3/52T and SMCJ15CA-M3/57T, the SMCJ15A-M3/57T delivers optimal balance of high-energy handling (1500 W), thermal robustness (75 °C/W), and unidirectional precision for 12–24 V DC rail protection-making it preferred for automotive and industrial power interfaces where load dump immunity is mandatory.
Availability
SMCJ15A-M3/57T is available at Aetrix Electronics and suitable for automotive ECU designs, industrial PLC I/O modules, and telecom power interface circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMCJ15A-M3/57T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series is engineered for high-power transient suppression in harsh environments-targeting automotive, industrial, and telecom systems where sustained surge immunity and AEC-Q101 qualification readiness are essential.
FAQ
What is the clamping voltage of the SMCJ15A-M3/57T under a 10/1000 µs surge?
The SMCJ15A-M3/57T clamps to a maximum of 24.4 V when subjected to its rated 61.5 A peak pulse current (IPPM) using the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet revision 09-Jan-2024, ensuring predictable overvoltage limiting for downstream 28 V-tolerant ICs in the SMCJ15A-M3/57T protection path.
Is the SMCJ15A-M3/57T suitable for automotive applications?
Yes-the SMCJ15A-M3/57T uses the same die and process as AEC-Q101-qualified HM3 variants (e.g., SMCJ15A-HM3/57T). While the M3 suffix itself denotes halogen-free RoHS compliance-not formal AEC-Q101 certification-it is explicitly designated by Vishay as "AEC-Q101 qualified available" with base P/NHM3_X ordering codes, making the SMCJ15A-M3/57T a production-ready precursor for automotive qualification programs.
How does the SMCJ15A-M3/57T differ from the bidirectional SMCJ15CA-M3/57T?
The SMCJ15A-M3/57T is unidirectional with cathode marking and clamps only on reverse-biased surges, whereas the SMCJ15CA-M3/57T is bidirectional-clamping identically in both polarities with no polarity marking. Both share identical VWM (15 V), VC (24.4 V), and PPPM (1500 W), but the SMCJ15A-M3/57T is selected for DC power rail protection, while SMCJ15CA-M3/57T suits AC or floating signal lines like CAN or RS-485 where polarity reversal occurs.
What is the thermal resistance of the SMCJ15A-M3/57T, and how does it affect layout?
The SMCJ15A-M3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. To maintain TJ ≤150 °C under 6.5 W steady-state dissipation, designers must ensure adequate copper area and avoid thermal bottlenecks-especially critical in sealed enclosures. The SMCJ15A-M3/57T's low RθJA enables reliable operation without heatsinks in most industrial and automotive applications.
Does the SMCJ15A-M3/57T meet moisture sensitivity requirements for lead-free reflow?
Yes-the SMCJ15A-M3/57T is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and withstands peak reflow temperatures up to 260 °C without preconditioning or baking. This eliminates moisture-related popcorning risk during lead-free assembly and simplifies logistics for high-volume SMT lines handling the SMCJ15A-M3/57T.
SMCJ15A-M3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 61.5A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ15A-M3/57T FAQ
1.How can I place an order for SMCJ15A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ15A-M3/57T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMCJ15A-M3/57T reliable?
The price and inventory of SMCJ15A-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ15A-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ15A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ15A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ15A-M3/57T?
SMCJ15A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ15A-M3/57T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMCJ15A-M3/57T?
For technical support, including SMCJ15A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ15A-M3/57T requirements.
6.How does Aetrix verify that SMCJ15A-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ15A-M3/57T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMCJ15A-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ15A-M3/57T?
All SMCJ15A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ15A-M3/57T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMCJ15A-M3/57T part is unused and in its original packaging.
Return procedure for SMCJ15A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ15A-M3/57T Tags
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