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Vishay General Semiconductor - Diodes Division SMP12A-M3/84A
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- Part No.:
- SMP12A-M3/84A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-220AA
- Datasheet:
-
SMP12A-M3/84A.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO220AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,170
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Product details
Overview
SMP12A-M3/84A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in the eSMP® Series, designed for clamping voltage transients on power 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) - protecting MOSFETs and ICs in industrial sensor interfaces.
For engineers reviewing the SMP12A-M3/84A datasheet, SMP12A-M3/84A pinout, SMP12A-M3/84A application, or SMP12A-M3/84A equivalent, key selection criteria include clamping performance at 20.1 A surge, unidirectional polarity with cathode band marking, DO-220AA package compatibility with automated SMT placement, and compliance with JESD201 Class 2 whisker resistance and MSL Level 1 reflow.
Technical Context
This TVS diode operates as a fast-acting shunt protector, triggering when reverse voltage exceeds its 13.3–14.7 V breakdown threshold to divert transient energy away from downstream circuitry. Its low 19.9 V clamping voltage at 20.1 A ensures sensitive 12 V rail components remain within safe operating limits during ESD or inductive switching events.
Constructed in the ultra-low-profile SMP (DO-220AA) package with matte tin-plated leads, it delivers 50 °C/W junction-to-lead thermal resistance and supports reflow up to 260 °C peak. The device is halogen-free, RoHS-compliant, and rated for operation from –55 °C to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - maximum continuous reverse working voltage before clamping begins; defines safe operating range for 12 V systems |
| VBR min/max | 13.3 V / 14.7 V - breakdown occurs within this range at 1 mA test current; ensures reliable turn-on margin above VWM |
| VC @ IPPM | 19.9 V - clamping voltage measured at 20.1 A peak pulse; guarantees downstream ICs see ≤19.9 V during worst-case transients |
| PPPM | 400 W - peak pulse power handling with 10/1000 μs waveform; sufficient for IEC 61000-4-5 Level 3 surges |
| IFSM | 40 A - non-repetitive forward surge rating (10 ms half-sine); supports robustness against power-rail fault currents |
| TJ max | +150 °C - maximum junction temperature; enables use in high-ambient industrial environments without derating |
| RθJL | 50 °C/W - thermal resistance from junction to lead; allows efficient heat transfer to PCB copper pads |
Pinout & Package
Package: SMP (DO-220AA), ultra-low-profile surface-mount case with 1.0 mm typical height, UL 94 V-0 molding compound, and cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal under forward bias | Connected to lower-potential side of protected line; enables unidirectional clamping from cathode to anode |
| Cathode | Current exit terminal under forward bias; marked with band | Connected to higher-potential side (e.g., 12 V rail); reverse-biased during transient to conduct surge current to ground |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables protection against IEC 61000-4-5 combination wave surges up to 1 kV/42 Ω without failure |
| 19.9 V clamping at 20.1 A | Keeps protected 12 V logic or analog circuits below absolute maximum ratings during transient events |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without preconditioning or special handling |
| JESD201 Class 2 whisker resistance | Ensures long-term solder joint reliability in automotive and industrial applications with thermal cycling |
| Halogen-free, RoHS-compliant | Meets environmental compliance requirements for global electronics manufacturing and end-of-life disposal |
Applications
| Industrial Sensor Interface Protection | Automotive Body Control Module (BCM) Power Rail |
|---|---|
Use Scenario: Protecting 12 V supply lines feeding Hall-effect or temperature sensors in factory automation PLCs exposed to relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient spikes induced by inductive load switching on 12 V rails. Use Value: Limits voltage excursion to ≤19.9 V during 20.1 A surges, preventing latch-up or gate oxide damage in connected sensor front-ends. |
Use Scenario: Safeguarding microcontroller power inputs in BCM modules subjected to load-dump and jump-start conditions. IC Role / Device Role / Timing Role: Fast-response shunt suppressor absorbing 400 W pulses to maintain stable 12 V domain operation. Use Value: Withstands 40 A single-half-sine surge and maintains clamping integrity across –40 °C to +125 °C ambient. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Drive Board |
Use Scenario: Guarding RS-485 transceiver power pins against lightning-induced surges on outdoor telecom cabinet backplanes. IC Role / Device Role / Timing Role: Standoff-rated TVS placed between VCC and GND to clamp common-mode transients before they reach communication ICs. Use Value: 12 V VWM aligns with 3.3 V/5 V LDO outputs; 19.9 V VC ensures transceivers remain within ABSMAX even during 10/1000 μs surges. |
Use Scenario: Shielding MCU I/O and gate driver supplies in washing machine motor control boards from brush-commutator noise. IC Role / Device Role / Timing Role: Low-profile TVS mounted adjacent to MOSFET drivers to suppress commutation spikes on 12 V logic rails. Use Value: 1.0 mm height fits tight board spacing; DO-220AA footprint enables high-density layout without sacrificing surge margin. |
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-M3/85A | Identical electrical specs; differs only in packaging - 13" tape-and-reel (10,000 pcs) vs. 7" reel (3,000 pcs) | No functional difference; selected for high-volume production runs requiring larger reels and reduced changeover frequency | Choose SMP12A-M3/84A for prototyping or medium-batch builds; SMP12A-M3/85A for full production ramp with automated pick-and-place feeders |
| SMAJ12A | Same VWM (12 V), but higher VC (20.9 V at 19.1 A), lower PPPM (400 W same), larger SMA (DO-214AC) package (2.3 mm height) | Less suitable for ultra-thin designs; slightly looser clamping margin may impact margin-critical 12 V rail protection | Select SMP12A-M3/84A where board height <1.1 mm is mandatory or where tighter clamping (19.9 V vs. 20.9 V) improves system-level surge immunity |
Compared with SMP12A-M3/85A, the SMP12A-M3/84A offers identical protection performance in a smaller reel format optimized for flexibility; versus SMAJ12A, it delivers lower clamping voltage and 1.3 mm less profile - critical for space-constrained industrial and automotive PCBs.
Availability
SMP12A-M3/84A is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, telecom line card protection, and consumer appliance motor drive boards requiring stable component supply and guaranteed long-term sourcing.
Supply support for SMP12A-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, efficiency, and application-specific performance.
The eSMP® Series, including SMP12A-M3/84A, was engineered for high-density, low-profile transient protection in automotive, industrial, and communications equipment where board space and thermal performance are critical constraints.
FAQ
What is the clamping voltage of the SMP12A-M3/84A at its rated peak pulse current?
The SMP12A-M3/84A has a maximum clamping voltage (VC) of 19.9 V when subjected to its rated peak pulse current (IPPM) of 20.1 A using a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 standards and ensures downstream 12 V components remain within safe operating limits during surge events. The SMP12A-M3/84A achieves this with low incremental surge resistance and fast response time.
Is the SMP12A-M3/84A suitable for lead-free reflow soldering processes?
Yes, the SMP12A-M3/84A meets MSL Level 1 per J-STD-020 and supports peak reflow temperatures up to 260 °C, making it fully compatible with standard lead-free soldering profiles. Its matte tin-plated terminals comply with J-STD-002 and JESD22-B102 solderability requirements, and the device passes JESD201 Class 2 whisker testing - ensuring long-term interconnect reliability in production assemblies.
How does the SMP12A-M3/84A differ from the SMP12A-M3/85A?
The SMP12A-M3/84A and SMP12A-M3/85A share identical electrical specifications, thermal characteristics, and mechanical dimensions. Their sole difference is packaging: SMP12A-M3/84A ships in 7" diameter tape-and-reel format (3,000 units per reel), while SMP12A-M3/85A uses 13" reels (10,000 units). Both are halogen-free, RoHS-compliant, and qualified to the same reliability standards.
What is the operating temperature range for the SMP12A-M3/84A?
The SMP12A-M3/84A is rated for an operating junction and storage temperature range of –55 °C to +150 °C. This wide range supports deployment in harsh environments such as under-hood automotive systems, industrial motor drives, and outdoor telecom infrastructure. Derating curves in the datasheet confirm sustained 400 W pulse capability down to –40 °C ambient.
Can the SMP12A-M3/84A be used in bidirectional transient protection applications?
No - the SMP12A-M3/84A is a unidirectional TVS diode, intended for clamping transients on DC power rails or biased signal lines where polarity is fixed. Its cathode band marking indicates polarity, and it conducts only when reverse-biased beyond VBR. For bidirectional protection (e.g., AC lines or USB data lines), a dedicated bidirectional part such as SMBJ12CA would be required instead of the SMP12A-M3/84A.
SMP12A-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:
- 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):
- 20.1A
- 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)
SMP12A-M3/84A FAQ
1.How can I place an order for SMP12A-M3/84A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMP12A-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 SMP12A-M3/84A reliable?
The price and inventory of SMP12A-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 SMP12A-M3/84A is usually 5 days.
3.What payment methods are accepted for SMP12A-M3/84A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMP12A-M3/84A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMP12A-M3/84A?
SMP12A-M3/84A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMP12A-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 SMP12A-M3/84A?
For technical support, including SMP12A-M3/84A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMP12A-M3/84A requirements.
6.How does Aetrix verify that SMP12A-M3/84A is sourced from the original manufacturer or authorized distributors?
All SMP12A-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 SMP12A-M3/84A meets industry standards.
7.What is the process for return or replacement of SMP12A-M3/84A?
All SMP12A-M3/84A units undergo pre-shipment inspection (PSI). If there is an issue with SMP12A-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 SMP12A-M3/84A part is unused and in its original packaging.
Return procedure for SMP12A-M3/84A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMP12A-M3/84A Tags
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