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Vishay General Semiconductor - Diodes Division SMPC12A-M3/87A
- Part No.:
- SMPC12A-M3/87A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
SMPC12A-M3/87A.pdf
- Description:
- TVS DIODE 12VWM 19.9VC TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:8,539
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Product details
Overview
SMPC12A-M3/87A from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor in the SMPC (TO-277A) package, with 12.0 V stand-off voltage (VWM), 13.3–14.7 V breakdown voltage (VBR), and 1500 W peak pulse power (PPPM). It clamps transients to ≤19.9 V at 75.4 A IPPM and operates from –55 °C to +150 °C, protecting MOSFETs and ICs in automotive and industrial power rails.
For engineers reviewing the SMPC12A-M3/87A datasheet, SMPC12A-M3/87A pinout, SMPC12A-M3/87A application, or SMPC12A-M3/87A equivalent, key selection criteria include unidirectional polarity, 1.25 W steady-state power dissipation, MSL Level 1 reflow compatibility, 1.1 mm profile for space-constrained PCBs, and AEC-Q101 qualification eligibility via HM3 suffix variants.
Technical Context
This device functions as a silicon avalanche diode designed for parallel connection across sensitive nodes to shunt ESD and inductive switching surges. Its low incremental surge resistance and fast response time enable sub-nanosecond clamping onset, while the dual-anode configuration (SMPCxxA series) supports symmetrical thermal distribution when mounted on heatsink-equipped PCBs.
The SMPC12A-M3/87A uses a TO-277A outline with cathode band marking, matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and meets UL 94 V-0 flammability rating. It is halogen-free, RoHS-compliant, and rated for 1500 W peak pulse power under 10/1000 μs waveform per Fig. 3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12.0 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 13.3 V / 14.7 V - guaranteed avalanche conduction threshold at 1 mA test current |
| VC @ IPPM | ≤19.9 V - clamped voltage during 75.4 A 10/1000 μs surge, defining worst-case overvoltage seen by protected circuit |
| PPPM | 1500 W - peak transient power handling capability, critical for IEC 61000-4-5 level 4 compliance |
| PD @ 25 °C | 1.25 W - steady-state power dissipation limit on FR4 PCB with 2 oz copper, guiding thermal layout |
| TJ max | +150 °C - maximum junction temperature, enabling operation in under-hood automotive environments |
| Polarity | Unidirectional - protects against positive-going transients only; requires correct orientation relative to DC bias |
Pinout & Package
Package: SMPC (TO-277A), surface-mount, 3-terminal, 1.1 mm typical height, JEDEC-compliant outline with cathode band marking. Dimensions: 4.80 × 3.70 × 1.10 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 | Primary current entry path during clamping | Connected to protected line; dual-anode structure lowers thermal resistance when both anodes are routed to copper pour |
| Anode 2 | Secondary current entry path during clamping | Electrically tied to Anode 1 internally; provides redundant thermal path and improves surge current sharing |
| Cathode | Clamping reference node | Connected to system ground or lower-potential rail; cathode band denotes this terminal on top surface |
Key Features
| Feature | Design Value |
|---|---|
| Very low profile (1.1 mm) | Enables use in ultra-thin consumer electronics and stacked PCB assemblies without mechanical interference |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow without preconditioning, reducing manufacturing complexity |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), improving protection margin |
| Matte tin-plated leads | Ensures reliable solder wetting and long-term intermetallic stability per J-STD-002 |
| UL 94 V-0 molding compound | Meets flame-retardancy requirements for industrial and automotive enclosures |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Suppressing load-dump transients on 12 V battery-fed ECUs and body control modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and downstream DC/DC converter input. Use Value: Clamps 35 V/100 ms load dump to ≤19.9 V, preventing overvoltage damage to LDOs and microcontrollers. | Use Scenario: Protecting 24 V digital input channels of programmable logic controllers from field-wiring induced surges. IC Role / Device Role / Timing Role: Parallel-connected TVS on each optocoupler input line, referenced to common ground. Use Value: Absorbs 1 kV/500 A ring-wave surges per IEC 61000-4-5, maintaining signal integrity during factory floor EMI events. |
| Consumer Power Adapter Output | MOSFET Gate Driver Protection |
Use Scenario: Safeguarding USB PD and QC adapter secondary-side synchronous rectifiers from flyback spikes. IC Role / Device Role / Timing Role: TVS placed across output capacitor terminals to clamp transformer leakage energy. Use Value: Limits output overvoltage to <20 V during no-load or short-circuit recovery, preserving GaN FET gate oxide integrity. | Use Scenario: Preventing gate-source overvoltage on high-side N-channel MOSFETs driven by bootstrap circuits. IC Role / Device Role / Timing Role: TVS connected between gate and source pins, with cathode to source. Use Value: Clamps negative-going Miller-induced spikes to ≤19.9 V, avoiding gate oxide breakdown during hard switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A-E3/5AT | DO-214AC package, 1.5 mm height, 400 W PPPM, 12.2–13.5 V VBR range | Lower surge rating and taller profile; suitable for cost-sensitive non-automotive designs | Select when board height >1.1 mm is acceptable and 400 W surge immunity suffices |
| SMCJ12AHE3/57T | DO-214AB package, 2.6 mm height, 1500 W PPPM, 13.3–14.7 V VBR, AEC-Q101 qualified | Larger footprint and higher thermal mass; better for sustained surge duty but less space-efficient | Select when AEC-Q101 certification is mandatory and PCB area permits larger outline |
Compared with SMAJ12A-E3/5AT and SMCJ12AHE3/57T, the SMPC12A-M3/87A delivers identical clamping performance in a 45 % lower profile package, enabling next-generation compact power modules where Z-height is constrained below 1.2 mm.
Availability
SMPC12A-M3/87A is available at Aetrix Electronics and suitable for automotive power rail protection, industrial PLC input protection, consumer power adapter output clamping, and MOSFET gate driver protection requiring stable component supply and consistent MSL Level 1 reflow compatibility.
Supply support for SMPC12A-M3/87A 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, and transient protection devices with emphasis on reliability and automotive-grade qualification.
The SMPC series was developed for high-power-density surface-mount TVS applications demanding low-profile packaging, robust surge handling, and compatibility with automated SMT assembly lines in automotive and industrial markets.
FAQ
What is the exact breakdown voltage range for SMPC12A-M3/87A?
The SMPC12A-M3/87A has a guaranteed breakdown voltage (VBR) range of 13.3 V to 14.7 V at 1 mA test current, measured per ANSI/IEEE C62.35 standards. This range ensures consistent avalanche initiation across production lots and defines the minimum voltage at which the device begins clamping. The SMPC12A-M3/87A maintains this specification under all operating conditions within its rated temperature range.
Is SMPC12A-M3/87A AEC-Q101 qualified?
No, SMPC12A-M3/87A is not AEC-Q101 qualified. Only SMPCxxAN variants with HM3 suffix (e.g., SMPC22ANHM3) carry AEC-Q101 qualification. The SMPC12A-M3/87A is industrial-grade, halogen-free, and RoHS-compliant, but lacks automotive qualification documentation. For automotive applications requiring AEC-Q101, consider SMPC22ANHM3 or higher-voltage AN-series equivalents.
What does the /87A package code indicate for SMPC12A-M3/87A?
For SMPC12A-M3/87A, the /87A suffix specifies 13-inch diameter plastic tape-and-reel packaging containing 6500 units per reel. This differs from /86A (7-inch reel, 1500 units). Both /86A and /87A are mechanically identical and electrically interchangeable - the suffix solely denotes packaging format and quantity, not device performance or qualification level. The SMPC12A-M3/87A remains fully compatible with standard SMT pick-and-place equipment.
Can SMPC12A-M3/87A be used in bidirectional configurations?
No, SMPC12A-M3/87A is strictly unidirectional and must be oriented with cathode toward the higher potential side of the protected circuit. Bidirectional protection requires either two SMPC12A-M3/87A devices in series opposition or a dedicated bidirectional TVS such as SMPC12CA. Using SMPC12A-M3/87A in reverse polarity will result in forward conduction and failure. The SMPC12A-M3/87A datasheet explicitly states "Unidirection" under FEATURES.
What is the thermal resistance from junction to ambient for SMPC12A-M3/87A?
The SMPC12A-M3/87A has a typical junction-to-ambient thermal resistance (RθJA) of 85 °C/W and a maximum of 100 °C/W when mounted on a standard FR4 PCB with 2 oz copper and the recommended pad layout. This value assumes convection cooling only and is critical for calculating maximum allowable power dissipation at elevated ambient temperatures. The SMPC12A-M3/87A thermal performance is optimized for low-profile layouts where heatsinking is limited.
SMPC12A-M3/87A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- TO-277, 3-PowerDFN
- Series:
- TransZorb®, eSMP®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- 75.4A
- 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:
- TO-277A (SMPC)
SMPC12A-M3/87A FAQ
1.How can I place an order for SMPC12A-M3/87A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMPC12A-M3/87A 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 SMPC12A-M3/87A reliable?
The price and inventory of SMPC12A-M3/87A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMPC12A-M3/87A is usually 5 days.
3.What payment methods are accepted for SMPC12A-M3/87A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMPC12A-M3/87A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMPC12A-M3/87A?
SMPC12A-M3/87A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMPC12A-M3/87A 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 SMPC12A-M3/87A?
For technical support, including SMPC12A-M3/87A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMPC12A-M3/87A requirements.
6.How does Aetrix verify that SMPC12A-M3/87A is sourced from the original manufacturer or authorized distributors?
All SMPC12A-M3/87A 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 SMPC12A-M3/87A meets industry standards.
7.What is the process for return or replacement of SMPC12A-M3/87A?
All SMPC12A-M3/87A units undergo pre-shipment inspection (PSI). If there is an issue with SMPC12A-M3/87A, 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 SMPC12A-M3/87A part is unused and in its original packaging.
Return procedure for SMPC12A-M3/87A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMPC12A-M3/87A Tags
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