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Vishay General Semiconductor - Diodes Division SMP12-M3/84A
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- Part No.:
- SMP12-M3/84A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-220AA
- Datasheet:
-
SMP12-M3/84A.pdf
- Description:
- TVS DIODE 12VWM 22VC DO220AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,932
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Product details
Overview
SMP12-M3/84A from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor (TVS) diode designed for clamping inductive switching surges and lightning-induced transients on power rails and signal lines. It features a 12 V stand-off voltage (VWM), 13.3–14.7 V breakdown voltage (VBR), 400 W peak pulse power (10/1000 μs), 20.1 A peak pulse current (IPPM), and 19.9 V maximum clamping voltage (VC) at IPPM - used to protect MOSFET gates, microcontroller I/O, and sensor interfaces in industrial motor drives.
For engineers reviewing the SMP12-M3/84A datasheet, SMP12-M3/84A pinout, SMP12-M3/84A application, or SMP12-M3/84A equivalent, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, thermal resistance (RθJA = 250 °C/W), unidirectional polarity, DO-220AA package footprint compatibility, and MSL Level 1 reflow capability up to 260 °C.
Technical Context
This TVS diode operates as a voltage-clamping protection device in parallel with sensitive circuit nodes. Its silicon avalanche structure delivers sub-nanosecond response time and low incremental surge resistance, enabling effective suppression of fast-rising transients such as ESD (per IEC 61000-4-2) and inductive kickback (per ISO 7637-2 Pulse 1/2a).
The SMP12-M3/84A is rated for continuous operation from –55 °C to +150 °C junction temperature, with thermal resistance from junction-to-lead (RθJL = 50 °C/W) supporting localized heat dissipation during repetitive surge events. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards, and the M3 suffix confirms halogen-free, RoHS-compliant, commercial-grade construction per JESD 201 Class 1A whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - maximum reverse working voltage before clamping begins; sets upper limit for normal operating rail voltage |
| VBR (min/max) | 13.3 V / 14.7 V - breakdown threshold range at 1 mA test current; defines onset of avalanche conduction |
| VC @ IPPM | 19.9 V - clamped voltage at 20.1 A peak pulse; must remain below protected device's absolute max rating |
| PPPM | 400 W - peak pulse power handling with 10/1000 μs waveform; determines survivability against standardized surge tests |
| IFSM | 40 A - non-repetitive forward surge current rating (10 ms half-sine); supports short-circuit fault tolerance |
| TJ max. | +150 °C - maximum junction temperature; constrains PCB copper pad area and ambient thermal design |
| RθJA | 250 °C/W - junction-to-ambient thermal resistance; requires ≥5.0 mm × 5.0 mm copper pads per terminal for rated performance |
Pinout & Package
Package: DO-220AA (SMP) - ultra-low-profile surface-mount package with 1.0 mm typical height, cathode band marking, and 0.105" × 0.086" (2.67 mm × 2.18 mm) body dimensions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction or clamping | Connected to lower-potential node (e.g., GND or return path); enables unidirectional clamping from cathode to anode |
| Cathode | Current exit point during reverse-biased clamping | Connected to protected line (e.g., 12 V rail or signal trace); clamps voltage when exceeds VWM by ~10–20 % |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables compliance with IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge immunity without derating |
| 19.9 V clamping at 20.1 A | Provides ≥2.1 V margin below typical 22 V absolute max rating of 12 V logic-level MOSFETs |
| DO-220AA package with 1.0 mm height | Supports high-density PCB layouts and automated pick-and-place with minimal Z-axis clearance |
| MSL Level 1, 260 °C peak reflow | Eliminates moisture sensitivity concerns and allows single-pass lead-free assembly without baking |
| M3 suffix: halogen-free & RoHS compliant | Meets JEDEC JS709A halogen-free definition and EU Directive 2011/65/EU requirements |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and low-side MOSFETs against inductive kickback from relay coils and solenoid loads. IC Role / Device Role / Timing Role: Unidirectional TVS placed between MOSFET source and gate driver output to clamp negative-going transients. Use Value: Limits gate-source voltage to ≤19.9 V, preventing oxide breakdown in 20 V-rated logic-level MOSFETs during 40 A coil de-energization. |
Use Scenario: Surge suppression on LIN bus lines and sensor supply rails exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between 12 V supply and ground to absorb ISO 7637-2 Pulse 5a energy. Use Value: Clamps 12 V rail to 19.9 V during 400 W transients, maintaining regulator input within safe operating area. |
| Consumer Power Adapters | Industrial PLC I/O Modules |
|
Use Scenario: Input-stage protection for AC-DC flyback controllers against lightning-induced surges on primary-side DC bus. IC Role / Device Role / Timing Role: Primary-side TVS across bulk capacitor to shunt overvoltage before reaching controller IC. Use Value: Withstands 400 W pulses while holding clamped voltage below 22 V, preserving 24 V-rated controller UVLO thresholds. |
Use Scenario: Signal line protection for analog inputs (e.g., 4–20 mA loops) against ESD and field-wiring faults. IC Role / Device Role / Timing Role: Series TVS on input path to limit transient energy entering precision amplifier front-end. Use Value: Sub-nanosecond response ensures clamping before 15 kV ESD pulse couples into op-amp input stage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMP12A-M3/84A | Same electrical specs and DO-220AA package; differs only in marking code (BE vs. no code) and minor process revision | No functional difference; SMP12A-M3/84A is the base family part number; SMP12-M3/84A is identical per Vishay documentation | Select SMP12A-M3/84A if full family naming consistency is required for BOM standardization |
| SMBJ12A | DO-214AA package (larger footprint, 2.3 mm height), same 12 V VWM, but higher VC = 19.9 V and lower RθJA = 19°C/W | Better thermal performance but incompatible PCB layout; requires redesign of pad geometry and stencil | Choose SMBJ12A only when higher surge repetition rate demands lower thermal resistance and board space permits larger package |
Compared with SMP12A-M3/84A, the SMP12-M3/84A is functionally identical and interchangeable; compared with SMBJ12A, it offers 40 % smaller board area and 1.0 mm profile at the cost of higher thermal resistance - making it optimal for space-constrained consumer and portable industrial designs where single-event surge protection suffices.
Availability
SMP12-M3/84A is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and consumer power adapters requiring stable component supply, consistent M3-grade material compliance, and DO-220AA footprint continuity.
Supply support for SMP12-M3/84A 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, power efficiency, and application-specific optimization.
The SMP series was engineered for high-density, low-profile transient protection in space-constrained applications - targeting consumer electronics, industrial controls, and automotive subsystems where mechanical height and PCB real estate are critical constraints.
FAQ
What is the clamping voltage of the SMP12-M3/84A under peak surge conditions?
The SMP12-M3/84A has a maximum clamping voltage (VC) of 19.9 V at its rated peak pulse current (IPPM) of 20.1 A with a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and represents the upper voltage limit imposed on the protected circuit during worst-case transient events. The SMP12-M3/84A maintains this clamping performance across its specified operating temperature range and is validated using the recommended 5.0 mm × 5.0 mm copper pad layout.
Is the SMP12-M3/84A compatible with lead-free reflow soldering processes?
Yes, the SMP12-M3/84A is qualified for lead-free reflow soldering with a maximum peak temperature of 260 °C and meets MSL Level 1 per J-STD-020. Its matte tin-plated terminals comply with J-STD-002 and JESD 22-B102 solderability standards, and the M3 suffix confirms qualification per JESD 201 Class 1A whisker testing - ensuring robust intermetallic formation and long-term joint reliability in production assembly.
How does the SMP12-M3/84A differ from the SMP12A-M3/84A?
The SMP12-M3/84A and SMP12A-M3/84A are electrically and mechanically identical per Vishay's documentation (Document Number 88481). Both share the same VWM (12 V), VBR (13.3–14.7 V), VC (19.9 V), package (DO-220AA), and M3 material specifications. The "A" suffix in SMP12A-M3/84A reflects the full family designation; SMP12-M3/84A is a valid orderable variant with identical performance and form factor.
What is the minimum recommended PCB pad layout for the SMP12-M3/84A?
Vishay specifies a minimum pad layout of 0.2" × 0.2" (5.0 mm × 5.0 mm) copper areas attached to each terminal for rated thermal and surge performance. This layout achieves the published RθJA of 250 °C/W and supports full 400 W peak pulse power dissipation. Deviating from this pad size reduces surge current handling and increases junction temperature - potentially triggering premature failure during repetitive transients.
Can the SMP12-M3/84A be used for bidirectional transient protection?
No, the SMP12-M3/84A is a unidirectional TVS diode, as confirmed by its polarity marking (cathode band) and electrical specifications - including separate VBR and VWM ratings only for reverse bias. For bidirectional protection, a dedicated bidirectional device such as the SMBJ12CA or SMAJ12CA must be selected; substituting SMP12-M3/84A would leave positive-going transients unprotected.
SMP12-M3/84A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-220AA
- Series:
- TransZorb®, eSMP®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 22V
- Current - Peak Pulse (10/1000µs):
- 18.2A
- Power - Peak Pulse:
- 400W
- 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-220AA (SMP)
SMP12-M3/84A FAQ
1.How can I place an order for SMP12-M3/84A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMP12-M3/84A 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 SMP12-M3/84A reliable?
The price and inventory of SMP12-M3/84A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMP12-M3/84A is usually 5 days.
3.What payment methods are accepted for SMP12-M3/84A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMP12-M3/84A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMP12-M3/84A?
SMP12-M3/84A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMP12-M3/84A 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 SMP12-M3/84A?
For technical support, including SMP12-M3/84A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMP12-M3/84A requirements.
6.How does Aetrix verify that SMP12-M3/84A is sourced from the original manufacturer or authorized distributors?
All SMP12-M3/84A 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 SMP12-M3/84A meets industry standards.
7.What is the process for return or replacement of SMP12-M3/84A?
All SMP12-M3/84A units undergo pre-shipment inspection (PSI). If there is an issue with SMP12-M3/84A, 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 SMP12-M3/84A part is unused and in its original packaging.
Return procedure for SMP12-M3/84A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMP12-M3/84A Tags
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