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Vishay General Semiconductor - Diodes Division P4SMA350AHM3_A/H
- Part No.:
- P4SMA350AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA350AHM3_A/H.pdf
- Description:
- TVS DIODE 300VWM 482VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,657
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Product details
Overview
P4SMA350AHM3_A/H 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 (VC) at 0.62 A peak pulse current (IPPM), and 400 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in industrial motor drives, telecom power supplies, and automotive ECUs.
For engineers reviewing the P4SMA350AHM3_A/H datasheet, P4SMA350AHM3_A/H pinout, P4SMA350AHM3_A/H application, or P4SMA350AHM3_A/H equivalent, key selection criteria include clamping performance under 10/1000 µs surges, AEC-Q101 qualification status, SMA (DO-214AC) package thermal resistance (RθJA = 120 °C/W), and unidirectional polarity marking for cathode identification.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when transient voltage exceeds its breakdown threshold (333–368 V), it avalanches rapidly to divert surge current away from downstream circuitry. Its glass-passivated junction ensures stable leakage (<1 µA at VWM) and long-term reliability under repetitive transients.
The device is rated for 400 W peak pulse power (derated to 300 W above 91 V), supports 40 A non-repetitive forward surge current (IFSM), and maintains operation across -65 °C to +150 °C junction temperature range - enabled by low incremental surge resistance and fast response time (<1 ns).
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/AC rail margin. |
| VBR (Breakdown Voltage) | 333–368 V at 1 mA - Confirmed avalanche initiation range; ensures predictable clamping onset. |
| VC (Clamping Voltage) | 482 V at IPPM = 0.62 A - Peak voltage seen by protected circuit during 10/1000 µs transient; critical for IC survival. |
| PPPM (Peak Pulse Power) | 400 W - Sustained energy absorption capability under standardized 10/1000 µs surge; validates robustness against lightning-induced spikes. |
| ID (Reverse Leakage) | <1 µA at 300 V - Minimal standby power loss and signal integrity impact in high-impedance circuits. |
| TJ max. | +150 °C - Enables use in under-hood automotive and high-temperature industrial environments without derating. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 standards. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads compliant with J-STD-002 and JESD22-B102 solderability requirements. Cathode identified by black band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to ground or lower-potential node in unidirectional configuration; enables clamping to reference plane. |
| Cathode | Current exit terminal during forward conduction; marked with band | Connected to protected line (e.g., 300 V rail); avalanche occurs between cathode and anode when VAK ≥ VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 surge immunity (4 kV line-to-earth) in compact SMA footprint. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive powertrain and chassis modules requiring zero-failure field reliability over 15-year service life. |
| Glass passivated junction | Eliminates moisture ingress risk and prevents parameter drift under humid or high-bias stress conditions. |
| MSL Level 1 (260 °C reflow) | Enables single-pass lead-free reflow assembly without popcorn cracking or delamination. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., inductive switch-off in solenoid drivers). |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of 300 V DC bus against switching transients from IGBT turn-off and regenerative braking. IC Role / Device Role / Timing Role: Unidirectional TVS placed between DC+ and ground to clamp voltage spikes exceeding 350 V. Use Value: Limits bus overvoltage to ≤482 V, preventing gate oxide rupture in 600 V IGBTs and sustaining system uptime in factory automation. |
Use Scenario: Input-stage surge suppression on -48 V telecom rectifier outputs exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing 10/1000 µs transients while maintaining <1 µA leakage at nominal rail. Use Value: Preserves low-noise regulation by avoiding false triggering and enables compliance with GR-1089-CORE Level 3 surge immunity. |
| Automotive Body Control Modules | Renewable Energy Inverters |
Use Scenario: Protection of LIN bus transceivers and microcontroller I/O pins against load dump and ISO 7637-2 Pulse 5a transients. IC Role / Device Role / Timing Role: High-VWM TVS on 12 V supply rail upstream of LDO regulators to prevent brownout and latch-up. Use Value: Withstands 35 V/100 ms load dump events without degradation, meeting OEM Tier-1 BOM requirements. |
Use Scenario: DC-link overvoltage clamping in solar string inverters where PV array open-circuit voltage reaches 600 V. IC Role / Device Role / Timing Role: Secondary clamping device behind MOVs to handle fast residual transients after primary suppression. Use Value: Provides precise 482 V clamping ceiling, protecting 650 V SiC MOSFETs from cumulative avalanche stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppressor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ350A-E3/5A | Same VWM/VBR/VC specs; RoHS-compliant but not AEC-Q101 qualified; MSL Level 1, 260 °C. | Lacks automotive qualification; suitable for commercial/industrial use only. | Select when AEC-Q101 is not required and cost sensitivity outweighs automotive traceability needs. |
| 1.5SMC350AHE3_A | Higher package thermal resistance (RθJA = 150 °C/W vs. 120 °C/W); same electrical specs; DO-214AB (SMB) package. | Larger footprint (5.3 mm × 4.1 mm vs. 4.5 mm × 2.8 mm); lower power density per board area. | Choose only if existing layout uses SMB pads or higher thermal mass is needed for sustained pulse duty cycles. |
Compared with SMAJ350A-E3/5A and 1.5SMC350AHE3_A, the P4SMA350AHM3_A/H delivers identical clamping performance in a smaller SMA package with certified automotive reliability - making it optimal for space-constrained, mission-critical applications where qualification and footprint efficiency are jointly prioritized.
Availability
P4SMA350AHM3_A/H is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, and automotive body control modules requiring stable component supply, AEC-Q101 traceability, and consistent surge immunity performance across production batches.
Supply support for P4SMA350AHM3_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 high-reliability, high-power, and automotive-qualified components.
The P4SMA Series targets high-voltage transient suppression in harsh environments, combining AEC-Q101 qualification, low-profile SMA packaging, and 400 W surge capability for next-generation power electronics and vehicle electrification systems.
FAQ
What is the clamping voltage of the P4SMA350AHM3_A/H under a 10/1000 µs surge?
The P4SMA350AHM3_A/H has a maximum clamping voltage (VC) of 482 V at a peak pulse current (IPPM) of 0.62 A with a 10/1000 µs waveform. This value is measured per standard test conditions defined in the Vishay datasheet (Document Number: 88367), and represents the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring compatibility with 600 V-class power devices.
Is the P4SMA350AHM3_A/H qualified for automotive applications?
Yes, the P4SMA350AHM3_A/H is AEC-Q101 qualified, as confirmed by the "HM3" suffix and documentation in Vishay's P4SMA series datasheet (Rev. 09-Jan-2024). This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and ESD, making the P4SMA350AHM3_A/H suitable for under-hood and chassis-mounted automotive electronics where long-term reliability is mandatory.
What does the "_A/H" suffix mean in P4SMA350AHM3_A/H?
The "_A/H" suffix in P4SMA350AHM3_A/H indicates revision level "A" and tape-and-reel packaging in 7-inch diameter reels (code "H"), containing 1800 units per reel. This ordering code aligns with Vishay's standard nomenclature for AEC-Q101-qualified HM3-grade parts, where "A" denotes the first revision of the HM3 variant for the 250–540 V range, per page 3 of Document Number 88367.
Can the P4SMA350AHM3_A/H replace a bidirectional TVS in a circuit?
No - the P4SMA350AHM3_A/H is a unidirectional TVS diode, identifiable by its cathode band marking and specified VWM/VBR values for reverse-biased operation only. It cannot substitute for a bidirectional device (e.g., P4SMA350CA) in AC-coupled or symmetrical surge environments without circuit redesign, as it conducts heavily in forward bias and offers no protection during positive transients on the anode side.
What is the thermal resistance of the P4SMA350AHM3_A/H, and how does it affect PCB layout?
The P4SMA350AHM3_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", or 5.0 mm × 5.0 mm per terminal). To maintain safe junction temperatures under repetitive surges, PCB layout must provide adequate copper area and avoid thermal bottlenecks - undersized pads will cause premature thermal shutdown or parametric shift during sustained transient activity.
P4SMA350AHM3_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:
- Discontinued at Digi-Key
- 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:
- 400W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA350AHM3_A/H FAQ
1.How can I place an order for P4SMA350AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA350AHM3_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 P4SMA350AHM3_A/H reliable?
The price and inventory of P4SMA350AHM3_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 P4SMA350AHM3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA350AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA350AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA350AHM3_A/H?
P4SMA350AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA350AHM3_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 P4SMA350AHM3_A/H?
For technical support, including P4SMA350AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA350AHM3_A/H requirements.
6.How does Aetrix verify that P4SMA350AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA350AHM3_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 P4SMA350AHM3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA350AHM3_A/H?
All P4SMA350AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA350AHM3_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 P4SMA350AHM3_A/H part is unused and in its original packaging.
Return procedure for P4SMA350AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA350AHM3_A/H Tags
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