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Vishay General Semiconductor - Diodes Division P4SMA12AHM3_A/I
- Part No.:
- P4SMA12AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA12AHM3_A/I.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,810
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Product details
Overview
P4SMA12AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 12 V breakdown voltage (VBR = 11.4–12.6 V at 1.0 mA), 10.2 V stand-off voltage (VWM), and 16.7 V clamping voltage (VC) at 24.0 A peak pulse current (IPPM). It delivers 400 W peak pulse power (10/1000 µs waveform), supports automotive-grade reliability per AEC-Q101, and protects MOSFETs and sensor signal lines in industrial power supplies.
For engineers reviewing the P4SMA12AHM3_A/I datasheet, P4SMA12AHM3_A/I pinout, P4SMA12AHM3_A/I application, or P4SMA12AHM3_A/I equivalent, this page provides verified electrical parameters, thermal derating behavior, clamping performance under surge conditions, and AEC-Q101 qualification status - all critical for ESD and lightning transient protection design in automotive and industrial control systems.
Technical Context
The P4SMA12AHM3_A/I operates as a unidirectional avalanche-clamping device with glass-passivated junction, enabling sub-nanosecond response to transients. Its 120 °C/W junction-to-ambient thermal resistance (RθJA) and 30 °C/W junction-to-lead (RθJL) define thermal limits under repetitive surge duty cycles.
It complies with UL 497B recognition (QVGQ2) and meets JESD201 Class 2 whisker resistance. The halogen-free, RoHS-compliant HM3 suffix confirms compliance with automotive material requirements and LF peak reflow of 260 °C per J-STD-020 MSL Level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 11.4 V / 12.6 V at 1.0 mA - defines precise avalanche initiation threshold for reliable overvoltage triggering |
| VWM | 10.2 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 16.7 V at 24.0 A - clamped voltage during 400 W 10/1000 µs surge, limiting stress on downstream ICs |
| PPPM | 400 W - peak transient power handling capability under standardized surge waveform |
| IFSM | 40 A - single half-sine surge rating (8.3 ms), supporting inrush and fault-current robustness |
| TJ max | +150 °C - maximum junction temperature, enabling operation in under-hood or high-ambient industrial environments |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 5.0 mm × 5.0 mm copper pad thermal requirement |
Pinout & Package
Package: SMA (DO-214AC), molded epoxy case meeting UL 94 V-0 flammability rating; matte tin-plated leads compliant with J-STD-002 and JESD22-B102 solderability standards. Polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or low-side reference in unidirectional TVS configuration |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 12 V rail or sensor input); conducts during positive transients |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive electronics including engine control units and ADAS sensor interfaces |
| 400 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 Level 4 surges without degradation when mounted per recommended pad layout |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes voltage overshoot during clamping, reducing risk of latch-up in protected CMOS ICs |
| MSL Level 1, 260 °C peak reflow | Enables compatibility with standard lead-free SMT assembly processes without moisture sensitivity concerns |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-supplied ECUs against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp positive surges above 16.7 V. Use Value: Limits voltage excursion to safe levels for 3.3 V/5 V microcontrollers and CAN transceivers downstream. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS connected across differential signal pair or single-ended output to ground. Use Value: Prevents damage to precision op-amps and ADC inputs while maintaining signal integrity up to 1 MHz. |
| Telecom DC Power Input Protection | Consumer Device USB Port Surge Suppression |
Use Scenario: Safeguarding PoE-powered network switches against induced lightning surges on 48 V DC input. IC Role / Device Role / Timing Role: Primary clamping device on DC input rail, coordinated with upstream fuse and filter inductors. Use Value: Absorbs 400 W transient energy without failure, preserving uptime in outdoor telecom infrastructure. |
Use Scenario: Adding secondary-level surge immunity to USB VBUS lines in smart home hubs and docking stations. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBUS and GND to suppress contact ESD (±15 kV air, ±8 kV contact). Use Value: Meets IEC 61000-4-2 Level 4 without degrading USB 2.0 signal rise time or insertion loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A | Higher package thermal mass (SMB/DO-214AA), 600 W PPPM, same VBR range but larger footprint | Better suited for higher-energy surges where board space allows larger package | Select SMBJ12A only if PCB layout permits DO-214AA and surge energy exceeds 400 W |
| 1.5KE12A | Through-hole TO-204AE (DO-41), 1500 W PPPM, identical VBR/VC specs but incompatible mounting | Used in legacy designs or high-reliability power supplies requiring axial-leaded robustness | Choose 1.5KE12A only for through-hole assembly or when mechanical shock resistance is prioritized over SMT automation |
Compared with SMBJ12A and 1.5KE12A, the P4SMA12AHM3_A/I offers optimal balance of AEC-Q101 qualification, compact SMA footprint, and 400 W surge capacity - making it the preferred choice for new automotive and industrial SMT designs where board area and reflow compatibility are constrained.
Availability
P4SMA12AHM3_A/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power inputs, and consumer USB protection requiring stable component supply, halogen-free compliance, and AEC-Q101 validation.
Supply support for P4SMA12AHM3_A/I 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 protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series is designed for robust transient suppression in automotive, industrial, and telecom systems - delivering consistent clamping performance, AEC-Q101 qualification, and surface-mount scalability across 6.8 V to 540 V standoff voltages.
FAQ
What is the clamping voltage of the P4SMA12AHM3_A/I under a 10/1000 µs surge?
The P4SMA12AHM3_A/I clamps to a maximum of 16.7 V at 24.0 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet (Doc. #88367) and reflects worst-case VC at rated surge level - critical for ensuring protected ICs remain within absolute maximum ratings during transient events.
Is the P4SMA12AHM3_A/I qualified for automotive applications?
Yes, the P4SMA12AHM3_A/I carries the HM3 suffix, confirming it is halogen-free, RoHS-compliant, and AEC-Q101 qualified. This certification covers stress tests including temperature cycling, high-temperature operating life, and ESD - validating its suitability for under-hood and chassis-mounted automotive modules per ISO/TS 16949 requirements.
What is the maximum operating junction temperature for the P4SMA12AHM3_A/I?
The P4SMA12AHM3_A/I has a maximum junction temperature (TJ) of +150 °C, as specified in the "Maximum Ratings" table of the Vishay datasheet. This rating enables reliable operation in high-ambient environments such as engine compartments or enclosed industrial enclosures, provided thermal design adheres to the 0.2" × 0.2" copper pad recommendation.
How does the P4SMA12AHM3_A/I differ from the P4SMA12A-E3 variant?
The P4SMA12AHM3_A/I differs from P4SMA12A-E3 in three key aspects: (1) HM3 denotes halogen-free and AEC-Q101 qualification, whereas E3 is commercial-grade only; (2) the "_A/I" suffix indicates 7500-unit tape-and-reel packaging on 13" reels; (3) HM3 devices undergo additional automotive process controls and lot traceability not required for E3.
What is the thermal resistance from junction to ambient for the P4SMA12AHM3_A/I?
The P4SMA12AHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on the minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value governs steady-state power dissipation limits and must be used with derating curves (Figure 2) to determine safe operating area at elevated ambient temperatures.
P4SMA12AHM3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- P4SMA, 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):
- 24A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA12AHM3_A/I FAQ
1.How can I place an order for P4SMA12AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA12AHM3_A/I 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 P4SMA12AHM3_A/I reliable?
The price and inventory of P4SMA12AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA12AHM3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA12AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA12AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA12AHM3_A/I?
P4SMA12AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA12AHM3_A/I 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 P4SMA12AHM3_A/I?
For technical support, including P4SMA12AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA12AHM3_A/I requirements.
6.How does Aetrix verify that P4SMA12AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA12AHM3_A/I 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 P4SMA12AHM3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA12AHM3_A/I?
All P4SMA12AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA12AHM3_A/I, 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 P4SMA12AHM3_A/I part is unused and in its original packaging.
Return procedure for P4SMA12AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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