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Vishay General Semiconductor - Diodes Division P4SMA350AHE3_A/I
- Part No.:
- P4SMA350AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA350AHE3_A/I.pdf
- Description:
- TVS DIODE 300VWM 482VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,155
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Product details
Overview
P4SMA350AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for high-voltage transient protection in power rails and signal lines. It features a 350 V standoff voltage (VWM), 368 V maximum breakdown voltage (VBR), 482 V clamping voltage at peak pulse current, 400 W peak pulse power rating (10/1000 µs), and AEC-Q101 qualification for automotive applications.
For engineers reviewing the P4SMA350AHE3_A/I datasheet, P4SMA350AHE3_A/I pinout, P4SMA350AHE3_A/I application, or P4SMA350AHE3_A/I equivalent, this device serves as a robust, low-profile overvoltage clamp for 300–400 V DC systems where fast response (<1 ns), low incremental surge resistance, and stable thermal performance up to 150 °C junction temperature are required.
Technical Context
The P4SMA350AHE3_A/I operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold (333–368 V), thereby shunting transient energy to ground while maintaining low clamping voltage (482 V). Its glass-passivated junction ensures stable leakage (<1 µA at 300 V) and long-term reliability under repetitive surges.
Designed for SMA (DO-214AC) surface-mount assembly, it delivers 400 W peak pulse power with 10/1000 µs waveform (derated to 300 W above 91 V), supports 0.01% duty cycle operation, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak temperature tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 300 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC operating margin. |
| VBR (Breakdown Voltage) | 333–368 V at 1 mA - Confirmed avalanche initiation range; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 482 V at IPPM - Peak voltage seen by protected circuit during 400 W transient; determines downstream component stress. |
| PPPM (Peak Pulse Power) | 400 W (10/1000 µs) - Energy-handling capability for standard lightning/surge waveforms; derates above 91 V. |
| ID (Reverse Leakage) | <1 µA at 300 V - Minimal standby power loss and signal integrity impact in high-impedance circuits. |
| TJ max | 150 °C - Maximum junction temperature enabling use in under-hood automotive and industrial environments. |
| 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 plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current path / Ground reference terminal | Connected to system ground or low-side return; completes clamping path during transient events. |
| Cathode | Protected line input / High-side connection | Connected to line being protected (e.g., 300 V DC rail); reverse-biased during normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 300–400 V systems without external series impedance. |
| Glass passivated chip junction | Ensures stable VBR and low leakage over 10+ years in harsh environments, including automotive under-hood exposure. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive electronics requiring zero-defect reliability, including engine control units and battery management systems. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns or pre-bake requirements. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., inductive switch-off), improving protection margin. |
Applications
| Automotive Battery Rail Protection | Industrial HV DC Link Clamping |
|---|---|
Use Scenario: Protecting 300–400 V battery monitoring circuits and gate drivers in 48 V mild-hybrid and 400 V BEV systems from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed across battery rail and ground to clamp surges exceeding 350 V. Use Value: Maintains 482 V clamping level under 400 W pulses, preventing damage to isolated ADCs, CAN transceivers, and MOSFET gate drivers. |
Use Scenario: Safeguarding IGBT gate drivers and current-sense amplifiers on 350 V DC link in motor drives and solar inverters. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between DC+ and ground to absorb switching-induced voltage spikes. Use Value: Fast <1 ns response and low dynamic impedance limit voltage overshoot to ≤482 V, preserving gate oxide integrity. |
| Telecom Power Supply Input | EV Charging Station Interface |
Use Scenario: Secondary-side overvoltage protection on 300–375 V telecom rectifier outputs exposed to lightning-induced surges on AC mains input. IC Role / Device Role / Timing Role: Unidirectional clamping device on DC output bus, coordinated with upstream MOVs and fuses. Use Value: 400 W rating and 150 °C TJ max allow sustained operation in enclosed, high-ambient telecom cabinets. |
Use Scenario: DC input stage protection in 350 V-rated AC/DC charging modules handling grid fluctuations and coupling transients from nearby EVSE switching. IC Role / Device Role / Timing Role: Primary transient suppressor on HV DC input before isolation barrier and PFC stage. Use Value: AEC-Q101 qualification and DO-214AC package support compliance with UL 497B and IEC 61851-1 safety standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ350A | Same VWM/VBR/VC specs but rated for 400 W only up to 200 V; 350 V version limited to 300 W per datasheet. | Lacks AEC-Q101 qualification; not approved for automotive under-hood use. | Select when cost sensitivity outweighs automotive qualification needs and peak power demand remains ≤300 W. |
| 1.5SMC350A | Higher package thermal resistance (RθJA = 150 °C/W vs. 120 °C/W); same electrical specs but lower power derating at elevated ambient. | DO-214AB package is larger and less suitable for dense automotive PCB layouts. | Choose only if existing footprint compatibility with SMC package is mandatory and board space permits larger outline. |
Compared with SMAJ350A and 1.5SMC350A, the P4SMA350AHE3_A/I provides superior thermal performance, automotive-grade reliability, and full 400 W capability at 350 V - making it the preferred choice for space-constrained, high-reliability 300–400 V transient protection.
Availability
P4SMA350AHE3_A/I is available at Aetrix Electronics and suitable for automotive battery management, industrial HV DC link protection, and telecom power supply input stages requiring stable component supply, AEC-Q101 compliance, and consistent 400 W surge handling.
Supply support for P4SMA350AHE3_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 engineered for high-voltage transient suppression in automotive, industrial, and telecom systems - delivering robust clamping performance in compact surface-mount packages with AEC-Q101 and UL 497B recognition.
FAQ
What is the clamping voltage of the P4SMA350AHE3_A/I at its rated peak pulse current?
The P4SMA350AHE3_A/I has a maximum clamping voltage (VC) of 482 V at its specified peak pulse current (IPPM) under a 10/1000 µs waveform. This value is measured at the device's rated 400 W peak pulse power and defines the upper voltage limit imposed on the protected circuit during surge events. The P4SMA350AHE3_A/I maintains this clamping performance across its operational temperature range and after repeated surge exposures.
Is the P4SMA350AHE3_A/I suitable for automotive applications?
Yes, the P4SMA350AHE3_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 undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and ESD, making it suitable for under-hood and battery-related automotive systems. The P4SMA350AHE3_A/I is explicitly listed for automotive ordering in Vishay's official ordering information table.
What does the "HE3" and "_A/I" suffix indicate in P4SMA350AHE3_A/I?
The "HE3" suffix denotes RoHS-compliant and AEC-Q101 qualified construction, while "_A/I" specifies the revision code ("A") and packaging format ("I" = 13-inch tape and reel, 7500 units per reel). This matches Vishay's documented ordering convention where "_A" applies to P4SMA6.8A–P4SMA220A, and "_B" applies to higher-voltage variants like P4SMA250A onward - confirming P4SMA350AHE3_A/I is a valid, manufacturer-supported part number.
How does the P4SMA350AHE3_A/I compare to bidirectional TVS diodes in the same series?
The P4SMA350AHE3_A/I is unidirectional and intended for DC line protection where polarity is fixed; bidirectional variants (e.g., P4SMA350CA) are used for AC or floating signal lines. Unlike bidirectional types, the P4SMA350AHE3_A/I exhibits forward conduction behavior below ~0.7 V and requires correct anode/cathode orientation. Its VWM (300 V) and VBR (333–368 V) are defined only in reverse bias, whereas bidirectional parts specify symmetric parameters in both directions.
What is the thermal resistance and maximum junction temperature of the P4SMA350AHE3_A/I?
The P4SMA350AHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended copper pads (0.2" × 0.2"), and a maximum junction temperature (TJ max) of +150 °C. These values enable reliable operation in high-ambient environments such as automotive engine compartments or industrial enclosures. The P4SMA350AHE3_A/I also features a junction-to-lead thermal resistance (RθJL) of 30 °C/W for improved heat transfer to PCB copper.
P4SMA350AHE3_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):
- 300V
- Voltage - Breakdown (Min):
- 333V
- Voltage - Clamping (Max) @ Ipp:
- 482V
- Current - Peak Pulse (10/1000µs):
- 620mA
- 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)
P4SMA350AHE3_A/I FAQ
1.How can I place an order for P4SMA350AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA350AHE3_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 P4SMA350AHE3_A/I reliable?
The price and inventory of P4SMA350AHE3_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 P4SMA350AHE3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA350AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA350AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA350AHE3_A/I?
P4SMA350AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA350AHE3_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 P4SMA350AHE3_A/I?
For technical support, including P4SMA350AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA350AHE3_A/I requirements.
6.How does Aetrix verify that P4SMA350AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA350AHE3_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 P4SMA350AHE3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA350AHE3_A/I?
All P4SMA350AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA350AHE3_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 P4SMA350AHE3_A/I part is unused and in its original packaging.
Return procedure for P4SMA350AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA350AHE3_A/I Tags
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