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Vishay General Semiconductor - Diodes Division 1.5SMC15A-M3/9AT
- Part No.:
- 1.5SMC15A-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC15A-M3/9AT.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,699
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Product details
Overview
1.5SMC15A-M3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients on power and signal lines. It features a 12.8 V stand-off voltage (VWM), 14.3–15.8 V breakdown voltage (VBR) at 1 mA, 21.2 V maximum clamping voltage (VC) at 70.8 A peak pulse current, and 1500 W peak pulse power capability with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the 1.5SMC15A-M3/9AT datasheet, 1.5SMC15A-M3/9AT pinout, 1.5SMC15A-M3/9AT application, or 1.5SMC15A-M3/9AT equivalent, key selection criteria include unidirectional polarity, SMC package thermal performance (RθJA = 75 °C/W), AEC-Q101 qualification eligibility (via HM3 suffix), low leakage (<1.0 μA at VWM), and compliance with UL 497B surge protector classification.
Technical Context
This TVS diode operates as a voltage-clamping protection device that enters avalanche conduction when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and fast response time (<1.0 ns), enabling effective suppression of ESD, lightning-induced surges, and inductive switching transients.
The 1.5SMC15A-M3/9AT is rated for 150 °C maximum junction temperature, supports 200 A non-repetitive forward surge current (8.3 ms half-sine), and exhibits low incremental surge resistance - critical for minimizing let-through energy during transient events in DC power rails and I/O lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 12.8 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown) | 14.3–15.8 V at 1 mA - Tight tolerance ensures predictable turn-on behavior across production lots and temperature range. |
| VC (Clamping) | 21.2 V at 70.8 A (10/1000 μs) - Limits peak voltage seen by downstream circuitry during surge events. |
| PPPM | 1500 W - Peak pulse power handling capacity determines survivability under standardized lightning/surge waveforms. |
| IPPM | 70.8 A - Peak pulse current rating directly correlates with system-level surge immunity (e.g., IEC 61000-4-5 Level 4). |
| TJ max | 150 °C - Enables reliable operation in under-hood automotive and high-ambient industrial environments. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated placement and reflow. |
Pinout & Package
SMC (DO-214AB) package with two terminals: cathode marked by band, anode unmarked. Designed for PCB mounting on 8.0 mm × 8.0 mm copper pads per terminal to meet thermal derating requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased terminal | Connected to protected line; conducts avalanche current when transient exceeds VBR. |
| Anode | Reference/ground terminal | Typically tied to system ground or low-impedance return path to complete clamping loop. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Supports IEC 61000-4-5 4th edition surge testing up to 4 kV open-circuit voltage in 2 Ω source impedance configurations. |
| Glass passivated junction | Ensures long-term stability of VBR and low parameter drift over temperature and lifetime; improves humidity resistance. |
| MSL Level 1 (260 °C peak) | Enables single-reflow assembly without moisture sensitivity concerns; eliminates bake-out requirement prior to SMT. |
| Halogen-free & RoHS-compliant (M3 suffix) | Fulfills environmental compliance for automotive and industrial OEMs requiring full material declaration and green manufacturing. |
| UL 497B recognized (QVGQ2) | Validates suitability as primary surge protection component in telecom and industrial equipment meeting safety agency requirements. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp overshoots above 15 V. Use Value: Limits voltage to ≤21.2 V during 70.8 A surge, preventing damage to LDOs, microcontrollers, and CAN transceivers. |
Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA loops) and digital I/Os of PLC modules from field-wiring induced surges. IC Role / Device Role / Timing Role: Standoff-rated clamping device on signal line with low leakage (<1 μA) to avoid loading precision circuits. Use Value: Maintains signal integrity while absorbing up to 1500 W transient energy without degradation over repeated events. |
| Consumer Power Adapter Input Stage | Telecom Line Card Surge Protection |
|
Use Scenario: Secondary-side DC output protection in wall adapters subjected to conducted EFT/burst noise per IEC 61000-4-4. IC Role / Device Role / Timing Role: Fast-response clamping element placed after rectifier and bulk capacitor to suppress residual spikes. Use Value: Sub-1 ns response ensures clamping initiates before sensitive DC-DC controllers experience overvoltage stress. |
Use Scenario: Primary protection on Ethernet PHY or RS-485 bus lines exposed to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Unidirectional TVS used in conjunction with common-mode chokes and GDTs for multi-stage protection. Use Value: Low clamping voltage (21.2 V) enables coordination with secondary protection devices to achieve <100 V let-through. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15A-E3/52T | Same VWM/VBR/VC specs but SMB (DO-214AA) package; lower PPPM (600 W); RθJA = 85 °C/W. | Lower power handling limits use to sub-300 W surge environments; less suitable for ISO 7637-2 Pulse 5a. | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2/4-4 only. |
| 1.5KE15A | Through-hole DO-201AE package; identical electrical specs but higher RθJA (65 °C/W on infinite heatsink only); no MSL rating. | Requires manual insertion or wave soldering; incompatible with fully automated SMT lines. | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required. |
Compared with SMBJ15A-E3/52T and 1.5KE15A, the 1.5SMC15A-M3/9AT delivers superior surge robustness (1500 W vs. 600 W or 1500 W with inferior thermal management), full SMT process support, and halogen-free compliance - making it optimal for high-reliability automotive and industrial production.
Availability
1.5SMC15A-M3/9AT is available at Aetrix Electronics and suitable for automotive ECU power rail protection, industrial PLC I/O conditioning, and telecom line card surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5SMC15A-M3/9AT 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The 1.5SMC Series was developed to deliver high-power, surface-mount transient protection for demanding automotive, industrial, and telecom applications - balancing clamping performance, thermal robustness, and manufacturability in standard SMC packaging.
FAQ
What is the maximum clamping voltage of the 1.5SMC15A-M3/9AT under a 10/1000 μs surge?
The 1.5SMC15A-M3/9AT has a maximum clamping voltage (VC) of 21.2 V when subjected to a 10/1000 μs waveform at its rated peak pulse current of 70.8 A. This value is measured per Figure 1 in Vishay document 88303 and defines the upper voltage limit imposed on protected circuitry during standardized surge events. The 1.5SMC15A-M3/9AT maintains this clamping performance across its specified operating temperature range (-65 °C to +150 °C).
Is the 1.5SMC15A-M3/9AT AEC-Q101 qualified?
The 1.5SMC15A-M3/9AT itself is not AEC-Q101 qualified; however, the 1.5SMC15AHM3_A/9AT variant (with HM3 suffix and revision code "A") is explicitly listed as AEC-Q101 qualified in the Vishay datasheet. The M3 suffix indicates halogen-free and RoHS compliance, but automotive qualification requires the additional HM3_A designation. Engineers selecting for automotive applications must verify ordering code suffixes carefully to ensure compliance.
What is the thermal resistance of the 1.5SMC15A-M3/9AT, and how does it affect layout?
The 1.5SMC15A-M3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the minimum recommended pad layout - specifically 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This value assumes no internal layer copper; adding thermal vias and inner-layer planes reduces RθJA. Layout must follow Vishay's recommended pad dimensions to ensure the 1.5SMC15A-M3/9AT sustains its 1500 W pulse rating without thermal runaway.
How does the 1.5SMC15A-M3/9AT differ from bidirectional variants like 1.5SMC15CA?
The 1.5SMC15A-M3/9AT is unidirectional and features a cathode band for polarity identification, while 1.5SMC15CA is bidirectional with no polarity marking and symmetrical clamping in both directions. Electrically, the 1.5SMC15A-M3/9AT has VWM = 12.8 V and VBR = 14.3–15.8 V, whereas 1.5SMC15CA specifies VWM = 12.8 V and VBR = 14.3–15.8 V in each direction. Use the 1.5SMC15A-M3/9AT for DC power rail protection and 1.5SMC15CA for AC-coupled or floating signal lines.
What is the leakage current specification for the 1.5SMC15A-M3/9AT at its stand-off voltage?
The 1.5SMC15A-M3/9AT exhibits a maximum reverse leakage current (ID) of 1.0 μA at its stand-off voltage (VWM = 12.8 V) and TA = 25 °C. This low leakage ensures minimal power loss and avoids interference with high-impedance sensing circuits or battery-powered systems. Leakage remains below 10 μA up to 150 °C junction temperature, as confirmed by Vishay's thermal derating curves in document 88303.
1.5SMC15A-M3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 70.8A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC15A-M3/9AT FAQ
1.How can I place an order for 1.5SMC15A-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC15A-M3/9AT 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 1.5SMC15A-M3/9AT reliable?
The price and inventory of 1.5SMC15A-M3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC15A-M3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC15A-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC15A-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC15A-M3/9AT?
1.5SMC15A-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC15A-M3/9AT 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 1.5SMC15A-M3/9AT?
For technical support, including 1.5SMC15A-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC15A-M3/9AT requirements.
6.How does Aetrix verify that 1.5SMC15A-M3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC15A-M3/9AT 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 1.5SMC15A-M3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC15A-M3/9AT?
All 1.5SMC15A-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC15A-M3/9AT, 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 1.5SMC15A-M3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC15A-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC15A-M3/9AT Tags
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