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Vishay General Semiconductor - Diodes Division P4SMA400AHE3_A/I
- Part No.:
- P4SMA400AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA400AHE3_A/I.pdf
- Description:
- TVS DIODE 342VWM 548VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,335
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Product details
Overview
P4SMA400AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It features a 400 V standoff voltage (VWM), 420 V minimum breakdown voltage (VBR), 548 V maximum clamping voltage (VC) at 0.55 A peak pulse current (IPPM), and 400 W peak pulse power rating with 10/1000 µs waveform - suitable for protecting MOSFETs, IGBTs, and sensor interfaces in industrial motor drives and telecom power supplies.
For engineers reviewing the P4SMA400AHE3_A/I datasheet, P4SMA400AHE3_A/I pinout, P4SMA400AHE3_A/I application, or P4SMA400AHE3_A/I equivalent, key selection criteria include clamping performance under 400 W surges, AEC-Q101 qualification status, SMA (DO-214AC) package thermal resistance (RθJA = 120 °C/W), and unidirectional polarity with cathode band marking.
Technical Context
This device operates as a clamping-type TVS diode, entering avalanche conduction when reverse voltage exceeds its 420 V minimum breakdown threshold (VBR), limiting transient energy to ≤548 V at rated IPPM. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1.0 ns), critical for suppressing ESD and inductive switching spikes.
Rated for 150 °C maximum junction temperature and compliant with J-STD-020 MSL Level 1 (peak reflow 260 °C), the P4SMA400AHE3_A/I supports automated SMT assembly on standard PCB pads (0.2" × 0.2" copper). Its 3.3 W steady-state power dissipation (PD) and 40 A non-repetitive forward surge rating (IFSM) enable robust operation in DC bus protection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 400 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working range. |
| VBR (Breakdown Voltage) | 380–420 V at 1.0 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 548 V at IPPM = 0.55 A - Peak voltage seen by protected circuit during 10/1000 µs surge; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 400 W - Energy-handling capacity per 10/1000 µs waveform; sufficient for IEC 61000-4-5 Level 4 surges. |
| ID (Reverse Leakage) | ≤1.0 µA at VWM - Minimal standby power loss and signal integrity impact in high-impedance sensing paths. |
| TJ max. | 150 °C - Enables reliable operation in enclosed industrial enclosures or near heat-generating power stages. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to lower-potential side of protected line; defines directionality of clamping action. |
| Cathode | Avalanche conduction terminal / Surge return path | Marked with band; connected to higher-potential rail (e.g., VBUS); carries full surge current during clamping. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables protection against severe lightning-induced surges per IEC 61000-4-5 without derating above 91 V. |
| Glass passivated chip junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive powertrain and body electronics where field reliability is mission-critical. |
| MSL Level 1 (260 °C peak reflow) | Supports single-pass lead-free reflow without popcorn cracking or delamination. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns response), improving protection margin. |
Applications
| Industrial Motor Drives | Telecom DC Power Supplies |
|---|---|
Use Scenario: Protection of IGBT gate drivers and DC bus monitoring circuits against inductive kickback from contactor switching and regenerative braking. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed across DC link or gate resistor network to limit transient overvoltage. Use Value: Clamps 400 V surges to ≤548 V within nanoseconds, preventing gate oxide rupture and ensuring >100,000-cycle reliability under repeated switching stress. |
Use Scenario: Input-stage surge suppression on -48 V telecom rectifier outputs exposed to lightning-induced common-mode transients. IC Role / Device Role / Timing Role: Primary-level TVS mounted between output rail and chassis ground to shunt surge energy before it reaches DC/DC converters. Use Value: Withstands 400 W pulses while maintaining <1.0 µA leakage at 400 V, preserving efficiency and enabling compliance with GR-1089-CORE Level 4 requirements. |
| Automotive Body Control Modules | Industrial Sensor Signal Conditioning |
Use Scenario: Protection of LIN bus transceivers and power window motor drivers against load dump and jump-start transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS on battery-supplied VCC rails to clamp positive-going surges up to 120 V peak. Use Value: AEC-Q101 qualification guarantees operation across -40 °C to +125 °C ambient, with validated performance through 1000-hour HTRB and 1000-cycle temperature cycling. |
Use Scenario: Shielding analog front-ends of pressure/temperature sensors in factory automation PLCs from ESD and relay coil flyback. IC Role / Device Role / Timing Role: Low-leakage (≤1.0 µA) TVS placed at sensor input connector to prevent latch-up in precision op-amps and ADCs. Use Value: 548 V clamping voltage preserves signal integrity during 8 kV contact ESD events, while SMA package allows dense layout near I/O connectors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ400A | Same VWM (400 V) and VC (548 V), but SMB package (DO-214AA); 10% larger footprint and 15% higher RθJA (138 °C/W). | Less suitable for space-constrained layouts; requires pad redesign and thermal reassessment for same power handling. | Select only if existing board uses SMB footprint or requires higher IFSM (100 A vs. 40 A). |
| 1.5KE400A | Through-hole DO-201 package; identical electrical specs but 3× higher RθJA (350 °C/W); no AEC-Q101 qualification. | Not viable for SMT production or automotive use; limited to prototyping or low-volume legacy repairs. | Choose only for manual assembly or when AEC-Q101 is not required and board lacks SMT capability. |
Compared with SMBJ400A and 1.5KE400A, the P4SMA400AHE3_A/I delivers identical clamping performance in a smaller, AEC-Q101-qualified SMA package optimized for automated manufacturing and thermally constrained environments - making it the preferred choice for new industrial and automotive designs requiring surface-mount reliability.
Availability
P4SMA400AHE3_A/I is available at Aetrix Electronics and suitable for industrial motor drives, telecom DC power supplies, automotive body control modules, and industrial sensor signal conditioning requiring stable component supply, AEC-Q101 validation, and consistent surge immunity performance across production batches.
Supply support for P4SMA400AHE3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, power efficiency, and automotive-grade qualification.
The P4SMA Series belongs to Vishay's TRANSZORB® TVS portfolio, engineered specifically for high-energy transient suppression in harsh environments - targeting industrial automation, automotive electronics, and telecom infrastructure where failure resilience is non-negotiable.
FAQ
What is the clamping voltage of the P4SMA400AHE3_A/I under maximum rated surge conditions?
The P4SMA400AHE3_A/I exhibits a maximum clamping voltage (VC) of 548 V when subjected to its rated peak pulse current (IPPM) of 0.55 A using the standard 10/1000 µs waveform. This value is measured at the device terminals under defined test conditions and represents the upper voltage limit imposed on the protected circuit during a worst-case surge event. The P4SMA400AHE3_A/I maintains this clamping performance consistently across its qualified temperature range (-65 °C to +150 °C).
Is the P4SMA400AHE3_A/I suitable for automotive applications?
Yes, the P4SMA400AHE3_A/I is AEC-Q101 qualified, as confirmed by its HE3 suffix and documentation in Vishay's P4SMA series datasheet (Rev. 09-Jan-2024). It has undergone stress testing including high-temperature reverse bias (HTRB), temperature cycling, and ESD per AEC-Q101 requirements. The P4SMA400AHE3_A/I is approved for use in automotive body electronics, power distribution units, and sensor interfaces where transient immunity and long-term reliability are mandated.
What does the "HE3" and "_A/I" suffix indicate in P4SMA400AHE3_A/I?
The "HE3" suffix denotes RoHS-compliant construction with AEC-Q101 qualification; "_A" indicates the revision level per Vishay's internal coding (Revision A for P4SMA6.8A–P4SMA220A, though P4SMA400A uses Revision B - the "A" here reflects base variant designation in ordering nomenclature); "/I" specifies packaging in 13-inch tape-and-reel format with 7500 units per reel. The P4SMA400AHE3_A/I thus combines automotive qualification, environmental compliance, and high-volume SMT-ready packaging.
How does the P4SMA400AHE3_A/I compare to bidirectional TVS diodes in surge protection design?
The P4SMA400AHE3_A/I is unidirectional and intended for DC-biased lines where polarity is fixed - such as positive power rails or signal lines referenced to ground. Unlike bidirectional variants (e.g., P4SMA400CA), it provides lower leakage (<1.0 µA) and avoids ambiguity in clamping direction. For AC or floating lines, a bidirectional device would be required; the P4SMA400AHE3_A/I must be oriented with cathode toward the higher-potential side to function correctly and avoid forward conduction during normal operation.
What is the thermal resistance and mounting requirement for optimal performance of the P4SMA400AHE3_A/I?
The P4SMA400AHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures under repetitive surges, ensure adequate copper area and avoid thermal isolation. Its junction-to-lead resistance (RθJL) is 30 °C/W, supporting localized heat sinking via PCB traces. The P4SMA400AHE3_A/I is rated for peak reflow of 260 °C (MSL Level 1), compatible with standard lead-free processes.
P4SMA400AHE3_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:
- 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/I FAQ
1.How can I place an order for P4SMA400AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA400AHE3_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 P4SMA400AHE3_A/I reliable?
The price and inventory of P4SMA400AHE3_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 P4SMA400AHE3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA400AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA400AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA400AHE3_A/I?
P4SMA400AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA400AHE3_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 P4SMA400AHE3_A/I?
For technical support, including P4SMA400AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA400AHE3_A/I requirements.
6.How does Aetrix verify that P4SMA400AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA400AHE3_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 P4SMA400AHE3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA400AHE3_A/I?
All P4SMA400AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA400AHE3_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 P4SMA400AHE3_A/I part is unused and in its original packaging.
Return procedure for P4SMA400AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA400AHE3_A/I Tags
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