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Vishay General Semiconductor - Diodes Division 1.5SMC12A-M3/9AT
- Part No.:
- 1.5SMC12A-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC12A-M3/9AT.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,903
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Product details
Overview
1.5SMC12A-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 12 V breakdown voltage (VBR = 11.4–12.6 V at IT = 1.0 mA), 16.7 V maximum clamping voltage (VC) at 89.8 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 μs waveform.
For engineers reviewing the 1.5SMC12A-M3/9AT datasheet, 1.5SMC12A-M3/9AT pinout, 1.5SMC12A-M3/9AT application, or 1.5SMC12A-M3/9AT equivalent, this device serves as a robust overvoltage protection component for automotive ECUs, industrial sensor interfaces, and DC power rails where fast response (<1 ns), low clamping ratio (1.39), and AEC-Q101-compliant halogen-free construction are required.
Technical Context
The 1.5SMC12A-M3/9AT operates as a unidirectional avalanche diode with cathode-band polarity marking, leveraging glass-passivated junction technology for stable breakdown and low incremental surge resistance. Its thermal design supports 150 °C max junction temperature and 75 °C/W junction-to-ambient thermal resistance when mounted on 8.0 mm × 8.0 mm copper pads.
It delivers 1500 W peak pulse power under standardized 10/1000 μs waveform conditions at 0.01% duty cycle, with 10.2 V stand-off voltage (VWM) and ≤5.0 μA reverse leakage at VWM. The device meets J-STD-020 MSL Level 1 and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 11.4 V / 12.6 V at 1.0 mA test current - defines precise avalanche initiation threshold for reliable overvoltage triggering |
| VWM | 10.2 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 16.7 V at 89.8 A - clamped voltage during 1500 W transient, limiting downstream stress to safe levels |
| PPPM | 1500 W - peak pulse power handling capability per 10/1000 μs waveform, enabling lightning and ESD surge suppression |
| IFSM | 200 A - non-repetitive forward surge current rating (8.3 ms half-sine), supporting inrush and fault-current events |
| TJ max | +150 °C - maximum junction temperature, allowing operation in under-hood automotive and industrial environments |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 0.320" body length and matte tin-plated leads |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, unidirectional configuration with cathode band marking. Body dimensions: 7.11 mm × 6.22 mm × 2.62 mm (L × W × H); terminal pitch: 3.20 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; conducts during forward surge or bias conditions |
| Cathode | Avalanche clamping terminal | Marked with band; connected to higher-potential side; initiates breakdown when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12 V systems without derating |
| Clamping ratio (VC/VBR) | 1.39 - low ratio ensures minimal overvoltage exposure to downstream ICs during transient events |
| Halogen-free & RoHS-compliant (M3 suffix) | Meets automotive and industrial environmental compliance mandates without compromising surge performance |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without pre-baking or special handling |
| AEC-Q101 qualified option available | Base P/NHM3_X variant enables direct use in automotive powertrain and body electronics |
Applications
| Automotive Power Supply Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs in engine control units against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient energy before it reaches LDO regulators and MCU VCC pins. Use Value: Limits clamped voltage to 16.7 V during 89.8 A surges, preventing brownout or latch-up in 5 V/3.3 V logic domains. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA transmitters) from field-induced surges in factory automation PLC modules. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) shunt clamp placed across signal and return paths near connector entry. Use Value: Maintains signal integrity by suppressing transients within 10/1000 μs window while adding only ≤10 pF capacitance at 0 V bias. |
| DC-DC Converter Input Protection | Telecom Line Card Surge Protection |
|
Use Scenario: Shielding buck converter input stages from inductive switching spikes and hot-swap transients in telecom power shelves. IC Role / Device Role / Timing Role: Primary overvoltage clamp on high-side input rail, coordinated with upstream fuse and common-mode chokes. Use Value: Absorbs up to 1500 W peak energy without degradation, sustaining 6.5 W steady-state dissipation at 50 °C ambient. |
Use Scenario: Front-end protection for Ethernet PHY power supplies and auxiliary bias rails in network switches exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Standoff-rated (10.2 V) unidirectional suppressor placed between PoE injector output and isolated DC-DC stage. Use Value: Meets GR-1089-CORE Level 3 surge immunity with verified 16.7 V clamping ceiling and <5 μA leakage at nominal rail voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A | Lower peak power (600 W), smaller SMB package (DO-214AA), same VBR range but higher VC (20.1 V) | Preferred for space-constrained consumer PCBs; insufficient for automotive load dump per ISO 16750-2 | Select when board area is critical and surge energy is limited to ≤600 W |
| 1.5KE12A | Through-hole TO-204AE (DO-41) package, identical electrical specs but no MSL 1 or AEC-Q101 qualification | Suitable for prototyping or legacy through-hole designs; not recommended for automated SMT production | Choose only for hand-soldered evaluation or cost-sensitive non-automated assemblies |
Compared with SMBJ12A and 1.5KE12A, the 1.5SMC12A-M3/9AT provides superior surge handling (1500 W vs. 600 W/1500 W), SMT compatibility, and halogen-free compliance-making it optimal for volume automotive and industrial production where reliability, manufacturability, and regulatory alignment are mandatory.
Availability
1.5SMC12A-M3/9AT is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and telecom power supply hardening requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5SMC12A-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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for demanding industrial and automotive applications.
The 1.5SMC Series was engineered specifically for surface-mount transient suppression in harsh environments, emphasizing high-power surge handling, AEC-Q101 qualification readiness, and compatibility with automated manufacturing processes.
FAQ
What is the clamping voltage of the 1.5SMC12A-M3/9AT under maximum rated surge current?
The 1.5SMC12A-M3/9AT exhibits a maximum clamping voltage (VC) of 16.7 V when subjected to its rated peak pulse current of 89.8 A using the standard 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88303 and ensures downstream circuitry remains within safe overvoltage limits during transient events. The 1.5SMC12A-M3/9AT maintains this clamping performance across its specified operating temperature range.
Is the 1.5SMC12A-M3/9AT suitable for automotive applications?
Yes-the 1.5SMC12A-M3/9AT carries the M3 suffix indicating halogen-free, RoHS-compliant construction and is part of the AEC-Q101-qualified 1.5SMC family. While the base 1.5SMC12A-M3/9AT itself is commercial-grade, its HM3 variant (e.g., 1.5SMC12AHM3_A/I) is fully AEC-Q101 certified for automotive use. Engineers deploying the 1.5SMC12A-M3/9AT in automotive contexts should verify qualification status per ordering code and consult Vishay's automotive datasheet supplements.
What is the standoff voltage (VWM) of the 1.5SMC12A-M3/9AT, and how does it relate to system operating voltage?
The 1.5SMC12A-M3/9AT has a maximum working peak reverse voltage (VWM) of 10.2 V, meaning it can be continuously applied across circuits operating up to this DC or RMS voltage without significant leakage. For a nominal 12 V automotive system, this allows margin above typical battery voltages (13.5–14.4 V) while ensuring reliable clamping onset just above normal operation. The 1.5SMC12A-M3/9AT avoids false triggering while remaining responsive to overvoltage faults.
Does the 1.5SMC12A-M3/9AT have polarity markings, and how is it oriented on the PCB?
Yes-the 1.5SMC12A-M3/9AT is unidirectional and features a visible cathode band on one end of the SMC (DO-214AB) package. During PCB layout, the banded end must connect to the higher-potential node (e.g., VIN rail), while the unbanded (anode) end connects to ground or lower-potential return. Reversing orientation disables avalanche clamping and risks catastrophic failure under reverse surge conditions. The 1.5SMC12A-M3/9AT pinout is strictly anode–cathode with no alternate configurations.
What thermal considerations apply when using the 1.5SMC12A-M3/9AT in high-temperature environments?
The 1.5SMC12A-M3/9AT has a maximum junction temperature (TJ) of +150 °C and a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads. At elevated ambient temperatures (>85 °C), derating curves in Figure 2 of document 88303 require reducing peak pulse power linearly. For sustained operation near TJ max, ensure adequate copper pour and avoid adjacent heat sources. The 1.5SMC12A-M3/9AT thermal performance is validated per JEDEC standards.
1.5SMC12A-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):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 89.8A
- 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)
1.5SMC12A-M3/9AT FAQ
1.How can I place an order for 1.5SMC12A-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC12A-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 1.5SMC12A-M3/9AT reliable?
The price and inventory of 1.5SMC12A-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 1.5SMC12A-M3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC12A-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC12A-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC12A-M3/9AT?
1.5SMC12A-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC12A-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 1.5SMC12A-M3/9AT?
For technical support, including 1.5SMC12A-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC12A-M3/9AT requirements.
6.How does Aetrix verify that 1.5SMC12A-M3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC12A-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 1.5SMC12A-M3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC12A-M3/9AT?
All 1.5SMC12A-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC12A-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 1.5SMC12A-M3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC12A-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC12A-M3/9AT Tags
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