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Vishay General Semiconductor - Diodes Division P4SMA56AHE3_A/H
- Part No.:
- P4SMA56AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA56AHE3_A/H.pdf
- Description:
- TVS DIODE 47.8VWM 77VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,200
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Product details
Overview
P4SMA56AHE3_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 56 V breakdown voltage (VBR = 53.2–58.8 V at IT = 1.0 mA), 47.8 V stand-off voltage (VWM), 77.0 V maximum clamping voltage (VC) at 5.2 A peak pulse current (IPPM), and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial power supplies.
For engineers reviewing the P4SMA56AHE3_A/H datasheet, P4SMA56AHE3_A/H pinout, P4SMA56AHE3_A/H application, or P4SMA56AHE3_A/H equivalent, this AEC-Q101 qualified TVS offers verified transient suppression performance, RoHS-compliant matte tin terminations, MSL Level 1 moisture sensitivity, and validated thermal resistance (RθJA = 120 °C/W) for high-reliability PCB-level surge protection design.
Technical Context
The P4SMA56AHE3_A/H operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold to divert transient energy to ground. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling fast response (<1 ns) to ESD and inductive switching events.
Rated for continuous operation from –65 °C to +150 °C, it delivers 3.3 W steady-state power dissipation on infinite heatsink at 50 °C ambient and supports 40 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine). The device meets UL 497B recognition (QVGQ2) and is qualified per AEC-Q101 for automotive under-hood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 53.2 V / 58.8 V at IT = 1.0 mA - defines precise clamping onset threshold for overvoltage detection |
| VWM | 47.8 V - maximum continuous reverse working voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 77.0 V at 5.2 A - clamped voltage during 400 W transient, limiting stress on downstream ICs |
| IPPM | 5.2 A with 10/1000 µs waveform - peak surge current capability under standardized lightning/surge test |
| PPPM | 400 W - peak pulse power handling capacity, derated above 25 °C per Fig. 2 |
| RθJA | 120 °C/W - thermal resistance from junction to ambient, critical for layout pad sizing and reliability margining |
| AEC-Q101 | Qualified - validated for automotive-grade temperature cycling, humidity, and mechanical robustness |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to protected line (e.g., VIN or signal trace); conducts during forward surge or bias |
| Cathode | Reverse-biased clamping terminal | Connected to ground or lower-potential rail; avalanches to clamp transients above VBR |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 3 surges (1 kV/2 Ω) without derating in standard layouts |
| Glass passivated junction | Ensures stable VBR over temperature and lifetime, with <0.1 %/°C tempco for predictable clamping |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS modules requiring zero-failure field reliability |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow without pre-baking, reducing manufacturing complexity and cost |
| UL 497B recognized (QVGQ2) | Meets safety agency requirements for telecom and industrial equipment surge protection circuits |
Applications
| Automotive Power Supply Protection | Industrial Sensor Signal Line Clamping |
|---|---|
|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load-dump transients and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp spikes up to ±100 V. Use Value: Limits voltage seen by downstream DC-DC converters and microcontrollers to ≤77.0 V, preventing latch-up or gate oxide damage. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance TVS on 0–5 V or 4–20 mA signal paths to suppress ESD and relay-induced transients. Use Value: Maintains signal integrity with <1 nA leakage at 47.8 V, avoiding offset errors while clamping >1 kV ESD events. |
| Telecom Interface Surge Protection | Consumer Device USB Power Line Protection |
|
Use Scenario: Safeguarding Ethernet PHY power pins (e.g., MDI-X) against lightning-induced surges in outdoor access points. IC Role / Device Role / Timing Role: Primary clamping device on 3.3 V or 5 V bias rails feeding PoE interface ICs. Use Value: Responds in <1 ns to divert 5.2 A surge current, holding rail voltage below 77.0 V to prevent PHY latch-up or reset. |
Use Scenario: Adding secondary overvoltage protection on USB VBUS lines in portable chargers and docking stations. IC Role / Device Role / Timing Role: Standby TVS parallel to primary OVP IC, activated only during abnormal AC adapter faults or hot-plug transients. Use Value: Withstands 40 A IFSM, surviving repeated 12 V overvoltage events without degradation, extending product lifecycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ56A-E3/52 (Vishay) | Higher 600 W PPPM, SMB (DO-214AA) package, 10% larger footprint, same VBR/VC specs | Better suited for higher-energy surges where board space allows larger package | Select when system-level surge testing requires >400 W margin or legacy SMB layout exists |
| 1.5SMC56A (ON Semiconductor) | Same VBR range and PPPM, SMC (DO-214AB) package, 20% larger than SMA, slightly higher RθJA (130 °C/W) | Used in industrial power supplies where SMC's higher IFSM (50 A) adds margin | Choose if existing SMC footprint is fixed or higher surge repetition rate demands enhanced thermal mass |
Compared with P4SMA56AHE3_A/H, SMBJ56A-E3/52 offers greater surge headroom in a larger package, while 1.5SMC56A provides identical electrical protection with increased physical robustness and thermal inertia - both require PCB layout changes and are not pin-compatible replacements.
Availability
P4SMA56AHE3_A/H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom infrastructure requiring stable component supply, AEC-Q101 compliance, and consistent TVS performance across production batches.
Supply support for P4SMA56AHE3_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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on reliability, precision, and application-specific validation.
The P4SMA Series targets cost-sensitive, high-volume surge protection needs in automotive, industrial, and consumer systems - delivering AEC-Q101 qualified TVS performance in compact SMA packages without sacrificing clamping accuracy or thermal stability.
FAQ
What is the maximum clamping voltage of the P4SMA56AHE3_A/H under a 10/1000 µs surge?
The P4SMA56AHE3_A/H has a maximum clamping voltage (VC) of 77.0 V at 5.2 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet (Doc. #88367, Rev. 09-Jan-2024) and defines the upper voltage limit imposed on protected circuitry during standardized surge events. The P4SMA56AHE3_A/H maintains this clamping performance across its full operating temperature range (–65 °C to +150 °C).
Is the P4SMA56AHE3_A/H suitable for automotive applications?
Yes, the P4SMA56AHE3_A/H is AEC-Q101 qualified and explicitly designated for automotive use via its "HE3" suffix and "_A/H" revision code. It undergoes stress testing for temperature cycling, humidity, mechanical shock, and high-temperature operating life per AEC-Q101 requirements. The P4SMA56AHE3_A/H is commonly deployed in engine control units, body electronics, and infotainment power rails where transient immunity and long-term reliability are mandatory.
What does the "HE3" suffix indicate in P4SMA56AHE3_A/H?
The "HE3" suffix in P4SMA56AHE3_A/H denotes RoHS-compliant construction with AEC-Q101 qualification and matte tin-plated terminations meeting J-STD-002 solderability standards. Per Vishay's ordering information (Doc. #88367, page 3), "HE3" identifies the commercial-grade, automotive-qualified variant with MSL Level 1 rating and UL 497B recognition - distinguishing it from non-automotive "E3" or halogen-free "HM3" versions.
How does the P4SMA56AHE3_A/H compare to bidirectional TVS diodes like P4SMA56CA?
The P4SMA56AHE3_A/H is unidirectional and intended for DC-biased lines where polarity is fixed (e.g., VCC-to-ground protection), offering tighter VBR tolerance and lower leakage than bidirectional variants. In contrast, P4SMA56CA protects AC or floating signals but exhibits higher reverse leakage and symmetric clamping. The P4SMA56AHE3_A/H cannot substitute for P4SMA56CA in AC-coupled applications without circuit redesign due to polarity dependence and asymmetric conduction behavior.
What is the thermal resistance (RθJA) of the P4SMA56AHE3_A/H, and how does it affect PCB layout?
The P4SMA56AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended copper pads (0.2" × 0.2", 5.0 mm × 5.0 mm per terminal). This value directly impacts safe power dissipation: at 25 °C ambient, the device can sustain ~3.3 W continuously only with adequate copper area. Reducing pad size increases RθJA, risking thermal runaway during repetitive surges - so the P4SMA56AHE3_A/H must be laid out per Vishay's specified mounting pad dimensions to meet its rated specifications.
P4SMA56AHE3_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):
- 47.8V
- Voltage - Breakdown (Min):
- 53.2V
- Voltage - Clamping (Max) @ Ipp:
- 77V
- Current - Peak Pulse (10/1000µs):
- 5.2A
- 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)
P4SMA56AHE3_A/H FAQ
1.How can I place an order for P4SMA56AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA56AHE3_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 P4SMA56AHE3_A/H reliable?
The price and inventory of P4SMA56AHE3_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 P4SMA56AHE3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA56AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA56AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA56AHE3_A/H?
P4SMA56AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA56AHE3_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 P4SMA56AHE3_A/H?
For technical support, including P4SMA56AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA56AHE3_A/H requirements.
6.How does Aetrix verify that P4SMA56AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA56AHE3_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 P4SMA56AHE3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA56AHE3_A/H?
All P4SMA56AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA56AHE3_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 P4SMA56AHE3_A/H part is unused and in its original packaging.
Return procedure for P4SMA56AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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