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Vishay General Semiconductor - Diodes Division SMPC12A-M3/86A
- Part No.:
- SMPC12A-M3/86A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
SMPC12A-M3/86A.pdf
- Description:
- TVS DIODE 12VWM 19.9VC TO277A
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMPC12A-M3/86A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in the SMPC (TO-277A) package, designed for clamping inductive-switching transients on DC power rails and signal lines. It features a 12.0 V stand-off voltage (VWM), 13.3–14.7 V breakdown voltage (VBR), 19.9 V maximum clamping voltage (VC) at 75.4 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform.
For engineers reviewing the SMPC12A-M3/86A datasheet, SMPC12A-M3/86A pinout, SMPC12A-M3/86A application, or SMPC12A-M3/86A equivalent, key selection criteria include clamping performance under 10/1000 μs surge, thermal resistance (RθJA ≤ 100 °C/W), AEC-Q101 qualification status, MSL level 1 compliance, and compatibility with automated SMT placement on FR4 PCBs with 2 oz copper.
Technical Context
This TVS diode operates in avalanche mode to limit transient overvoltages by shunting surge current away from protected circuitry. Its unidirectional polarity requires cathode connection to the higher-potential rail (e.g., VCC), with the band-marked terminal denoting cathode. Clamping begins at VBR and sustains up to 19.9 V while conducting 75.4 A, delivering predictable protection without latch-up or degradation under specified non-repetitive pulses.
Thermal design relies on junction-to-ambient dissipation (PD = 1.25 W at TA = 25 °C) and low-profile mounting (1.1 mm typical height) compatible with JEDEC TO-277A footprint. The device meets J-STD-020 MSL level 1 and JESD 201 class 2 whisker testing, supporting high-reliability industrial and automotive applications where board space and surge robustness are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12.0 V - Maximum continuous reverse working voltage before significant leakage; defines safe operating DC bias level. |
| VBR (min/max) | 13.3 V / 14.7 V - Breakdown onset range at 1.0 mA test current; ensures reliable turn-on above VWM with margin. |
| VC @ IPPM | 19.9 V at 75.4 A - Clamped voltage during 10/1000 μs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 1500 W - Peak pulse power handling capability; validates robustness against IEC 61000-4-5 Level 4 surges. |
| RθJA | ≤ 100 °C/W - Thermal resistance junction-to-ambient on standard FR4; enables thermal budget calculation for sustained operation. |
| Polarity | Unidirectional - Requires correct orientation (cathode to positive rail); prevents conduction during normal forward bias. |
| MSL Level | Level 1 per J-STD-020 - Supports unlimited floor life and reflow up to 260 °C peak; eliminates bake requirements pre-assembly. |
Pinout & Package
Package: SMPC (TO-277A), surface-mount, 3-terminal configuration with cathode band marking. Dimensions: 4.80 × 3.70 × 1.10 mm (L × W × H), 2.20 mm pad pitch, matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 | Primary anode connection | Electrically tied internally to Anode 2; forms one side of the PN junction; connects to protected line's low-potential side (e.g., GND or return path). |
| Anode 2 | Secondary anode connection | Internally shorted to Anode 1; provides redundant solder joint for mechanical stability and current sharing in high-surge applications. |
| Cathode (band-marked) | Clamping output node | Connects to protected line's high-potential side (e.g., VCC, signal rail); conducts surge current to anode when transient exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Very low profile (1.1 mm height) | Enables use in ultra-thin consumer and automotive modules where Z-axis clearance is constrained below 1.2 mm. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), improving clamping fidelity for sensitive logic inputs. |
| Excellent clamping capability (VC = 19.9 V @ 75.4 A) | Provides tight voltage limiting margin relative to 12 V system rails, protecting 13.3 V-rated components without derating headroom. |
| AEC-Q101 qualified option available | While SMPC12A-M3/86A is industrial grade, the HM3 suffix variant (e.g., SMPC12AHM3) supports automotive ECUs requiring qualification per AEC-Q101 Rev D. |
| Halogen-free, RoHS-compliant | Meets global environmental compliance mandates including EU RoHS Directive 2011/65/EU and JEDEC JS709E. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs in body control modules against load-dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between VBAT and GND, turning on within nanoseconds to clamp spikes above 13.3 V. Use Value: Limits transient voltage to ≤19.9 V during 75.4 A surges, preventing MCU brown-out or latch-up while maintaining <1.0 μA leakage at 12 V. | Use Scenario: Safeguarding analog front-end inputs of temperature/pressure sensors connected to PLC I/O cards exposed to relay coil flyback. IC Role / Device Role / Timing Role: Signal-line TVS mounted directly at connector entry point, shunting ESD and switching noise to ground before reaching op-amp input stage. Use Value: Delivers 1500 W peak pulse handling with 19.9 V clamping, preserving sensor accuracy and avoiding ADC saturation during 1 kV/500 A transients. |
| Telecom DC Power Input Protection | Consumer USB-C Power Delivery Line Protection |
Use Scenario: Securing 12 V auxiliary power inputs on PoE-powered network switches against Ethernet cable-induced surges and hot-swap transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC input rail upstream of DC-DC converter, absorbing energy before it reaches primary-side FETs. Use Value: Withstands 10/1000 μs surges up to 1500 W and maintains RθJA ≤ 100 °C/W on 2 oz FR4, enabling reliable operation in enclosed telecom enclosures. | Use Scenario: Protecting VBUS lines in USB-C PD sink designs against reverse-voltage faults and adapter surge events during plug insertion. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBUS and GND, rated for 12 V nominal operation with 19.9 V clamping to avoid violating USB PD 3.0 voltage tolerance limits. Use Value: Provides 1.25 W steady-state dissipation and MSL level 1 reflow compatibility, supporting high-volume SMT assembly without post-bake steps. |
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-E3/5A (Vishay) | DO-214AC (SMA) package; 12 V VWM; 19.9 V VC @ 75.4 A; same PPPM but higher RθJA (150 °C/W). | Larger footprint (4.5 × 2.7 mm vs. 4.8 × 3.7 mm) and taller profile (2.3 mm); less suitable for ultra-low-height designs. | Select SMAJ12A-E3/5A only if legacy SMA layout exists or thermal constraints allow higher RθJA. |
| 1.5KE12A (ON Semiconductor) | DO-201AD axial package; 12 V VWM; 20.1 V VC @ 75.0 A; 1500 W PPPM; not SMT-compatible. | Requires through-hole assembly and manual rework; incompatible with automated SMT lines and dense PCB layouts. | Choose 1.5KE12A only for prototyping, repair, or non-SMT applications where board real estate is unconstrained. |
Compared with SMAJ12A-E3/5A and 1.5KE12A, SMPC12A-M3/86A offers superior board-level integration via its low-profile SMPC package, lower thermal resistance, and native compatibility with high-speed pick-and-place equipment-critical for volume production of compact electronics.
Availability
SMPC12A-M3/86A is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface protection, and telecom DC power input protection requiring stable component supply, consistent MSL level 1 handling, and halogen-free RoHS compliance.
Supply support for SMPC12A-M3/86A 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 SMPC series targets high-density, high-reliability transient suppression in space-constrained environments, with design focus on low-profile SMT integration, automotive-grade variants, and robust surge handling for industrial and transportation systems.
FAQ
What is the maximum clamping voltage of SMPC12A-M3/86A under a 10/1000 μs surge?
The SMPC12A-M3/86A has a maximum clamping voltage (VC) of 19.9 V when subjected to its rated peak pulse current of 75.4 A with a 10/1000 μs waveform. This value is measured across the cathode and anode terminals during standardized surge testing and defines the upper voltage limit imposed on protected circuitry during transient events.
Is SMPC12A-M3/86A qualified to AEC-Q101?
No, SMPC12A-M3/86A is an industrial-grade part with M3 suffix. AEC-Q101 qualification applies only to variants with HM3 suffix (e.g., SMPC12AHM3), which are explicitly listed in the Vishay datasheet as qualified for automotive applications per AEC-Q101 Rev D.
What does the /86A package code indicate for SMPC12A-M3/86A?
The /86A suffix denotes the tape-and-reel packaging format: 7-inch diameter plastic tape and reel, with a base quantity of 1500 units per reel. This format is optimized for high-speed SMT placement equipment and is distinct from the /87A variant (13-inch reel, 6500 units).
Can SMPC12A-M3/86A be used in bidirectional configurations?
No, SMPC12A-M3/86A is strictly unidirectional. Its internal structure supports conduction only from cathode to anode. For bidirectional transient suppression, Vishay offers separate SMPCxxCA parts (e.g., SMPC12CA), which are explicitly designed with symmetrical breakdown characteristics.
What is the thermal resistance junction-to-ambient (RθJA) for SMPC12A-M3/86A?
The SMPC12A-M3/86A has a maximum RθJA of 100 °C/W when mounted on a standard FR4 PCB with 2 oz copper and the recommended footprint per the Vishay datasheet (Document Number: 89116). This value assumes natural convection cooling and is critical for calculating junction temperature rise under steady-state power dissipation.
SMPC12A-M3/86A 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-M3/86A FAQ
1.How can I place an order for SMPC12A-M3/86A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMPC12A-M3/86A 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-M3/86A reliable?
The price and inventory of SMPC12A-M3/86A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMPC12A-M3/86A is usually 5 days.
3.What payment methods are accepted for SMPC12A-M3/86A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMPC12A-M3/86A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMPC12A-M3/86A?
SMPC12A-M3/86A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMPC12A-M3/86A 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-M3/86A?
For technical support, including SMPC12A-M3/86A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMPC12A-M3/86A requirements.
6.How does Aetrix verify that SMPC12A-M3/86A is sourced from the original manufacturer or authorized distributors?
All SMPC12A-M3/86A 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-M3/86A meets industry standards.
7.What is the process for return or replacement of SMPC12A-M3/86A?
All SMPC12A-M3/86A units undergo pre-shipment inspection (PSI). If there is an issue with SMPC12A-M3/86A, 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-M3/86A part is unused and in its original packaging.
Return procedure for SMPC12A-M3/86A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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