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Vishay General Semiconductor - Diodes Division P4SMA400AHE3_A/H
- Part No.:
- P4SMA400AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA400AHE3_A/H.pdf
- Description:
- TVS DIODE 342VWM 548VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,786
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Product details
Overview
P4SMA400AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 400 W peak pulse power (10/1000 µs), 342 V standoff voltage (VWM), and 548 V clamping voltage (VC) at 0.55 A peak pulse current. It protects MOSFETs and ICs in industrial power supplies against inductive switching transients.
For engineers reviewing the P4SMA400AHE3_A/H datasheet, P4SMA400AHE3_A/H pinout, P4SMA400AHE3_A/H application, or P4SMA400AHE3_A/H equivalent, this device delivers AEC-Q101 qualification, low-profile SMA packaging for automated placement, and verified clamping performance under repetitive surge conditions up to 0.01% duty cycle.
Technical Context
This unidirectional TVS operates with a 342 V maximum reverse standoff voltage and clamps transients to ≤548 V at its rated 0.55 A peak pulse current (10/1000 µs waveform). Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance.
Designed for high-reliability applications, it meets MSL Level 1 per J-STD-020, supports 260 °C lead-free reflow, and maintains operation across -65 °C to +150 °C junction temperature range. The cathode band denotes polarity, and terminals are matte tin-plated for solderability per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 342 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 380 V / 420 V - Verified breakdown occurs within this range at 1 mA test current |
| VC @ IPPM | 548 V - Clamped voltage during 0.55 A 10/1000 µs transient, limiting stress on downstream components |
| PPPM | 400 W - Peak pulse power handling capability under standardized surge waveform |
| IFSM | 40 A - Non-repetitive forward surge rating (8.3 ms half-sine), relevant for fault-current paths |
| TJ max | +150 °C - Maximum junction temperature enabling use in thermally constrained industrial environments |
| RθJA | 120 °C/W - Thermal resistance from junction to ambient, informs heatsinking requirements on standard PCB pads |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with UL 94 V-0 flammability rating and matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to circuit ground or lower-potential node in unidirectional protection configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line; cathode band identifies this end for correct PCB orientation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| Glass passivated junction | Ensures stable VBR tolerance and long-term parameter stability under thermal stress |
| 400 W peak pulse power (10/1000 µs) | Handles common industrial surge events without degradation when mounted on 5.0 mm × 5.0 mm copper pads |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for sensitive ICs |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT assembly processes without moisture sensitivity concerns |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) Signal Line Protection |
|---|---|
Use Scenario: Suppresses load-dump and inductive kickback transients on 24 V DC input rails of programmable logic controllers and motor drives. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp surges above 342 V. Use Value: Limits transient voltage to ≤548 V, preventing damage to upstream rectifiers and downstream DC-DC controllers. |
Use Scenario: Protects LIN bus and sensor analog inputs in BCMs exposed to ISO 7637-2 Pulse 1/2a/5a waveforms. IC Role / Device Role / Timing Role: Standoff-rated TVS on signal lines referenced to battery ground, leveraging AEC-Q101 qualification. Use Value: Maintains signal integrity during 100 V/500 ms load dump events while meeting automotive thermal and lifetime requirements. |
| Telecom AC-DC Adapter Surge Protection | Consumer Appliance Motor Driver Stage Protection |
Use Scenario: Shields secondary-side control ICs in offline SMPS adapters subjected to lightning-induced surges on isolated outputs. IC Role / Device Role / Timing Role: Secondary-side unidirectional TVS across output capacitor to absorb reflected transients. Use Value: Clamps fast-rising spikes before they reach optocoupler feedback or PWM controller, reducing failure rate in field deployments. |
Use Scenario: Guards gate drivers and microcontrollers in washing machine motor inverters against back-EMF from brushed DC motors. IC Role / Device Role / Timing Role: TVS on low-voltage control lines tied to MCU GPIOs, with cathode connected to protected signal. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic from 400 V-level commutation spikes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ400A-E3/5A | Same VWM (342 V), identical SMA package, but rated for 400 W at 10/1000 µs and lacks AEC-Q101 qualification | Targeted at commercial/industrial use only; not validated for automotive temperature cycling or humidity testing | Select when AEC-Q101 is not required and cost optimization is prioritized over automotive qualification |
| 1.5SMC400A | Higher package thermal mass (DO-214AB), 400 W rating, same VWM/VC, but larger footprint and no AEC-Q101 listing | Requires larger PCB area; suited for higher average power dissipation scenarios where board space permits | Choose when improved thermal derating is needed beyond RθJA = 120 °C/W, and layout allows DO-214AB size |
Compared with SMAJ400A-E3/5A and 1.5SMC400A, P4SMA400AHE3_A/H uniquely combines AEC-Q101 qualification, SMA footprint efficiency, and verified 400 W clamping performance-making it the preferred choice for space-constrained automotive and industrial designs requiring certified reliability.
Availability
P4SMA400AHE3_A/H is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, telecom adapters, and consumer appliance motor control systems requiring stable component supply and AEC-Q101 compliance.
Supply support for P4SMA400AHE3_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 supplier of discrete semiconductors, specializing in diodes, rectifiers, and protection devices with emphasis on reliability and application-specific validation.
The P4SMA Series targets high-volume, high-reliability transient suppression in automotive, industrial, and telecom systems-designed to meet stringent surge immunity standards while supporting automated SMT assembly.
FAQ
What is the maximum clamping voltage of P4SMA400AHE3_A/H under standard test conditions?
The P4SMA400AHE3_A/H has a maximum clamping voltage (VC) of 548 V when subjected to its rated peak pulse current of 0.55 A using the 10/1000 µs waveform. This value is measured at TA = 25 °C with the device mounted on 0.2" × 0.2" copper pads per the Vishay P4SMA datasheet revision 09-Jan-2024. The P4SMA400AHE3_A/H maintains this clamping performance across its specified operating temperature range.
Is P4SMA400AHE3_A/H suitable for automotive applications?
Yes, P4SMA400AHE3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation stating AEC-Q101 availability for the P4SMA series with _A and _B revisions. It undergoes stress testing for temperature cycling, high-temperature reverse bias, and mechanical shock-making P4SMA400AHE3_A/H appropriate for under-hood and body electronics where transient immunity and long-term reliability are critical.
What does the "HE3" suffix indicate in P4SMA400AHE3_A/H?
The "HE3" suffix in P4SMA400AHE3_A/H denotes RoHS-compliant construction with AEC-Q101 qualification and matte tin-plated leads compliant with J-STD-002. The "H" indicates 7-inch tape-and-reel packaging (1800 units per reel), while "_A/H" specifies revision A and packaging variant H. This distinguishes P4SMA400AHE3_A/H from commercial-grade E3 or M3 variants and confirms its automotive-grade status.
How does the thermal resistance of P4SMA400AHE3_A/H affect PCB layout?
P4SMA400AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 0.2" × 0.2" copper pads. To maintain safe junction temperatures under repetitive surge conditions, designers must ensure adequate copper area and avoid excessive trace length between P4SMA400AHE3_A/H terminals and ground planes. Derating curves in Figure 2 of the datasheet guide thermal design for elevated ambient temperatures.
Can P4SMA400AHE3_A/H be used in bidirectional configurations?
No, P4SMA400AHE3_A/H is a unidirectional TVS diode, as indicated by the "A" suffix (vs. "CA" for bidirectional variants). Its cathode band marks polarity, and it conducts only in forward bias-clamping positive transients on the cathode side relative to anode. For bidirectional protection, Vishay specifies part numbers ending in "CA", such as P4SMA400CAHE3_A/H; using P4SMA400AHE3_A/H in reverse-biased AC applications would result in unintended conduction and failure.
P4SMA400AHE3_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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 342V
- Voltage - Breakdown (Min):
- 380V
- Voltage - Clamping (Max) @ Ipp:
- 548V
- Current - Peak Pulse (10/1000µs):
- 550mA
- Power - Peak Pulse:
- 300W
- 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)
P4SMA400AHE3_A/H FAQ
1.How can I place an order for P4SMA400AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA400AHE3_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 P4SMA400AHE3_A/H reliable?
The price and inventory of P4SMA400AHE3_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 P4SMA400AHE3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA400AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA400AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA400AHE3_A/H?
P4SMA400AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA400AHE3_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 P4SMA400AHE3_A/H?
For technical support, including P4SMA400AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA400AHE3_A/H requirements.
6.How does Aetrix verify that P4SMA400AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA400AHE3_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 P4SMA400AHE3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA400AHE3_A/H?
All P4SMA400AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA400AHE3_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 P4SMA400AHE3_A/H part is unused and in its original packaging.
Return procedure for P4SMA400AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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