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Vishay General Semiconductor - Diodes Division P4SMA12AHE3_A/H
- Part No.:
- P4SMA12AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA12AHE3_A/H.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,935
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Product details
Overview
P4SMA12AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 12 V breakdown voltage (VBR = 11.4–12.6 V at IT = 1.0 mA), 10.2 V maximum standoff voltage (VWM), and 16.7 V clamping voltage (VC) at 24.0 A peak pulse current (IPPM), delivering 400 W peak pulse power with 10/1000 µs waveform - ideal for protecting automotive sensor interfaces and industrial I/O circuits.
For engineers reviewing the P4SMA12AHE3_A/H datasheet, P4SMA12AHE3_A/H pinout, P4SMA12AHE3_A/H application, or P4SMA12AHE3_A/H equivalent, key selection criteria include its AEC-Q101 qualification, low incremental surge resistance, 150 °C max junction temperature, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads - critical for high-reliability automotive and industrial designs requiring robust ESD and lightning surge immunity.
Technical Context
The P4SMA12AHE3_A/H operates as a unidirectional clamping device with cathode-band polarity marking, leveraging glass-passivated silicon junction technology for fast response (<1 ns) and stable breakdown characteristics. Its thermal resistance (RθJA = 120 °C/W) and RθJL = 30 °C/W support operation up to 150 °C junction temperature under transient stress.
It meets J-STD-020 MSL Level 1 (peak reflow ≤ 260 °C), complies with RoHS and halogen-free requirements, and is rated for 40 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine) - enabling use in DC power rail protection where repetitive surge events are infrequent but energy levels are high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 11.4 V / 12.6 V at 1.0 mA test current - defines precise clamping onset threshold for overvoltage detection |
| VWM | 10.2 V maximum - ensures reliable blocking of normal operating voltage without leakage conduction |
| VC @ IPPM | 16.7 V at 24.0 A - limits downstream IC voltage exposure during 10/1000 µs transients |
| PPPM | 400 W peak pulse power - sustains high-energy surges (e.g., ISO 7637-2 Pulse 1/2a/5a) without failure |
| IPPM | 24.0 A peak pulse current - supports protection of 12 V automotive systems against load dump and inductive switching |
| TJ max | +150 °C - enables deployment in under-hood and industrial environments with elevated ambient temperatures |
| Package | SMA (DO-214AC) - industry-standard SMT footprint compatible with JEDEC MS-013, optimized for automated assembly |
Pinout & Package
SMA (DO-214AC) surface-mount package with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; cathode identified by band marking; no polarity marking on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal (unidirectional) | Connected to protected line side; reverse-biased during normal operation |
| Cathode | Current exit terminal (unidirectional) | Connected to ground or low-impedance return path; conducts during overvoltage clamp event |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| 400 W peak pulse power (10/1000 µs) | Clamps high-energy transients such as ISO 16750-2 load dump without degradation |
| Glass passivated chip junction | Ensures long-term stability and low parameter drift across temperature and humidity stress |
| MSL Level 1 moisture sensitivity | Enables direct placement without baking, reducing manufacturing cost and cycle time |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD, relay bounce) |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting LIN bus and analog sensor outputs (e.g., pressure, temperature) in engine control modules from load dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between sensor output and microcontroller input. Use Value: Limits transient voltage to ≤16.7 V, preventing latch-up or damage to 3.3 V/5 V ADC inputs while maintaining signal integrity. |
Use Scenario: Safeguarding 24 V PLC digital input channels against field wiring surges and ground loop transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input front-end before optocoupler or Schmitt trigger. Use Value: Absorbs up to 400 W pulses without derating, enabling compliance with IEC 61000-4-5 Level 3 (2 kV/12 Ω) immunity testing. |
| Consumer Power Adapter Input | Telecom Line Card Surge Protection |
Use Scenario: Secondary-side transient suppression on 12 V DC output rails of wall adapters exposed to mains-coupled noise. IC Role / Device Role / Timing Role: Fast-response clamping diode parallel to output capacitor. Use Value: Responds in <1 ns to suppress ringing and overshoot from switching regulator instability or cable disconnect events. |
Use Scenario: Front-end protection for Ethernet PHY power pins and auxiliary bias supplies in network switches. IC Role / Device Role / Timing Role: Standoff-rated TVS on +3.3 V/+12 V supply rails feeding communication ICs. Use Value: Maintains 10.2 V VWM margin above nominal rail, ensuring zero leakage at full operating temperature range (−40 °C to +85 °C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A-E3/52 | Higher package thermal resistance (RθJA = 140 °C/W), same VBR range but SMB package (DO-214AA), 600 W PPPM | Preferred for higher-power board-level protection where PCB space allows larger footprint | Select when higher pulse energy handling is required and layout permits SMB size |
| 1.5KE12A | Through-hole DO-201 package, 1500 W PPPM, higher VC (20.1 V), not AEC-Q101 qualified | Suitable for prototyping or legacy through-hole designs; lacks automotive qualification | Choose only for non-automotive, cost-sensitive, or through-hole assembly scenarios |
Compared with SMBJ12A-E3/52 and 1.5KE12A, the P4SMA12AHE3_A/H offers optimal balance of AEC-Q101 compliance, compact SMA footprint, and precise 16.7 V clamping - making it the preferred choice for space-constrained, high-reliability automotive and industrial SMT designs where qualification and repeatability are mandatory.
Availability
P4SMA12AHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, consumer power adapter outputs, and telecom line card protection requiring stable component supply and long-term lifecycle assurance.
Supply support for P4SMA12AHE3_A/H 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 MOSFETs with emphasis on reliability, efficiency, and application-specific performance.
The P4SMA Series is engineered for robust transient suppression in automotive, industrial, and consumer electronics - delivering AEC-Q101-qualified, surface-mount TVS diodes with tightly controlled breakdown and clamping parameters.
FAQ
What is the clamping voltage of P4SMA12AHE3_A/H at its rated peak pulse current?
The P4SMA12AHE3_A/H has a maximum clamping voltage (VC) of 16.7 V at 24.0 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per standard test methods and ensures predictable overvoltage limiting for downstream components. The P4SMA12AHE3_A/H maintains this clamping performance across its specified operating temperature range and is validated for AEC-Q101 compliance.
Is P4SMA12AHE3_A/H suitable for automotive applications?
Yes, P4SMA12AHE3_A/H is AEC-Q101 qualified and explicitly designated for automotive use via its "HE3" suffix and revision code "_A/H". It meets stringent reliability requirements for under-hood and cabin electronics, including thermal cycling, humidity resistance, and surge immunity. The P4SMA12AHE3_A/H is commonly deployed in engine control units, body control modules, and ADAS sensor interfaces where certified transient protection is mandatory.
What does the "HE3" and "_A/H" suffix in P4SMA12AHE3_A/H indicate?
The "HE3" suffix denotes RoHS-compliant and AEC-Q101-qualified construction, while "_A/H" specifies the revision level ("A") and packaging format ("H" = 7-inch tape-and-reel, 1800 units per reel). This ordering code ensures traceability to Vishay's qualified automotive-grade production lot. The P4SMA12AHE3_A/H is distinct from commercial-grade variants (e.g., P4SMA12AE3) due to extended reliability testing and tighter parametric screening.
How does P4SMA12AHE3_A/H compare to bidirectional TVS diodes like P4SMA12CA?
The P4SMA12AHE3_A/H is unidirectional and intended for DC line protection with defined polarity (cathode band), whereas P4SMA12CA is bidirectional and used for AC or floating signal lines. The P4SMA12AHE3_A/H offers lower leakage at VWM (1.0 µA vs. 5.0 µA for P4SMA12CA) and is optimized for asymmetric voltage rails. Its AEC-Q101 qualification also differs from the commercial-grade P4SMA12CA variant.
What is the maximum operating temperature for P4SMA12AHE3_A/H?
The P4SMA12AHE3_A/H has a maximum junction temperature (TJ) of +150 °C and an operating junction/storage temperature range of −65 °C to +150 °C. Its thermal resistance values (RθJA = 120 °C/W, RθJL = 30 °C/W) are characterized on standard 0.2" × 0.2" copper pads. Derating applies above 25 °C ambient, and the P4SMA12AHE3_A/H remains fully functional within automotive under-hood thermal profiles.
P4SMA12AHE3_A/H 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA12AHE3_A/H FAQ
1.How can I place an order for P4SMA12AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA12AHE3_A/H 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 P4SMA12AHE3_A/H reliable?
The price and inventory of P4SMA12AHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA12AHE3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA12AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA12AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA12AHE3_A/H?
P4SMA12AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA12AHE3_A/H 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 P4SMA12AHE3_A/H?
For technical support, including P4SMA12AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA12AHE3_A/H requirements.
6.How does Aetrix verify that P4SMA12AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA12AHE3_A/H 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 P4SMA12AHE3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA12AHE3_A/H?
All P4SMA12AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA12AHE3_A/H, 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 P4SMA12AHE3_A/H part is unused and in its original packaging.
Return procedure for P4SMA12AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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