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Vishay General Semiconductor - Diodes Division P4SMA350A-M3/5A
- Part No.:
- P4SMA350A-M3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA350A-M3/5A.pdf
- Description:
- TVS DIODE 300VWM 482VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA350A-M3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 350 V standoff voltage (VWM), 368 V minimum breakdown voltage (VBR), and 400 W peak pulse power (10/1000 µs waveform). It clamps transients to 482 V at 0.62 A peak pulse current and is used to protect MOSFETs, ICs, and sensor signal lines in industrial power supplies and telecom infrastructure.
For engineers reviewing the P4SMA350A-M3/5A datasheet, P4SMA350A-M3/5A pinout, P4SMA350A-M3/5A application, or P4SMA350A-M3/5A equivalent, key selection criteria include unidirectional polarity, 300 V–400 V clamping range, thermal resistance (RθJA = 120 °C/W), AEC-Q101 qualification status, and halogen-free RoHS compliance per M3 suffix.
Technical Context
The P4SMA350A-M3/5A operates as a unidirectional avalanche diode with glass-passivated junction, responding in sub-nanosecond time to transient overvoltages. Its 350 V stand-off voltage enables use on high-voltage DC rails up to ±400 V, while its 482 V maximum clamping voltage at IPPM ensures safe margin below typical 600 V MOSFET drain-source ratings.
Designed for automated SMT placement, it meets J-STD-020 MSL Level 1 (peak reflow 260 °C) and JESD201 Class 2 whisker resistance. The SMA package provides 0.064 g unit weight and 5.0 mm × 5.0 mm copper pad thermal derating per Vishay's recommended layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 300 V - Maximum continuous reverse operating voltage before conduction begins; defines upper limit of normal circuit operation. |
| VBR (Breakdown Voltage) | 333–368 V at 1 mA - Voltage at which device enters avalanche region; ensures reliable triggering above system nominal voltage. |
| VC (Clamping Voltage) | 482 V at IPPM = 0.62 A - Peak voltage seen by protected circuit during 10/1000 µs surge; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 400 W - Surge energy handling capability under standard 10/1000 µs waveform; supports repetitive transients at 0.01% duty cycle. |
| ID (Reverse Leakage) | 1.0 µA at VWM - Low leakage preserves efficiency in high-impedance bias networks and avoids false triggering. |
| TJ max | 150 °C - Maximum junction temperature; sets thermal design boundary for PCB copper area and ambient conditions. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" pads; informs heatsinking requirements for sustained power dissipation. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Cathode indicated by band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when voltage exceeds VBR. |
| Anode (unmarked end) | Reference node / ground return | Typically tied to system ground or low-impedance return path; completes clamping loop during overvoltage event. |
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 DC bus lines without derating. |
| Glass passivated junction | Ensures stable VBR over temperature and long-term reliability in humid or thermally cycling environments. |
| MSL Level 1 rating | Supports single-reflow assembly without moisture sensitivity concerns; eliminates bake-out requirement. |
| AEC-Q101 qualified (P4SMA350A-M3 includes B-grade revision) | Validated for automotive powertrain and body electronics applications requiring extended temperature and life-cycle validation. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), improving clamping fidelity. |
Applications
| Industrial DC Power Supply Protection | Telecom Line Card Surge Protection |
|---|---|
|
Use Scenario: Protecting 380 V DC intermediate bus in programmable logic controller (PLC) power modules from inductive switching spikes and lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed across input capacitor bank to shunt transient energy before it reaches DC-DC converters and microcontrollers. Use Value: Limits voltage excursion to ≤482 V, preserving 600 V-rated MOSFETs and avoiding latch-up in 3.3 V logic supervisors. |
Use Scenario: Safeguarding Ethernet PHY interface and PoE injector circuitry on telecom access equipment exposed to induced surges on 48 V DC distribution lines. IC Role / Device Role / Timing Role: Standoff-rated TVS mounted at board edge to absorb common-mode surges before they propagate into magnetics and data-line ESD protection arrays. Use Value: Withstands 400 W pulses without degradation, maintaining signal integrity on 100BASE-TX lines while meeting GR-1089-CORE immunity requirements. |
| Renewable Energy Inverter DC Link | Automotive On-Board Charger (OBC) Input Stage |
|
Use Scenario: Clamping voltage transients on 600 V-class solar inverter DC link caused by rapid IGBT turn-off and stray inductance. IC Role / Device Role / Timing Role: High-VWM TVS placed between DC+ and DC− rails to suppress differential-mode surges exceeding 350 V. Use Value: 333–368 V VBR ensures no conduction during normal operation; 482 V VC prevents overvoltage stress on film capacitors and gate drivers. |
Use Scenario: Protecting AC/DC front-end rectifier and PFC stage in 11 kW OBCs subjected to load dump and jump-start events per ISO 7637-2. IC Role / Device Role / Timing Role: AEC-Q101 qualified unidirectional TVS installed across bulk capacitor inputs to clamp 120 V–400 V transients. Use Value: Halogen-free M3 construction and 150 °C TJ rating support under-hood thermal environments; 0.62 A IPPM aligns with ISO 7637-2 Pulse 5a test profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ350A | Same VWM/VBR/VC specs but in larger SMB (DO-214AA) package; RθJA = 80 °C/W vs. 120 °C/W. | Better thermal performance allows higher sustained surge repetition; requires larger PCB footprint (4.5 mm × 3.9 mm vs. 4.9 mm × 3.9 mm). | Select SMBJ350A when board space permits and thermal derating margin is critical; P4SMA350A-M3/5A preferred for dense layouts. |
| 1.5SMC350A | Higher PPPM (1500 W), same VWM/VBR, but in larger SMC (DO-214AB) package; non-AEC-Q101, commercial grade only. | Supports extreme surge events (e.g., direct lightning coupling); lacks automotive qualification and halogen-free certification. | Choose 1.5SMC350A for non-automotive, high-energy industrial systems; P4SMA350A-M3/5A fits AEC-Q101 and space-constrained designs. |
Compared with SMBJ350A and 1.5SMC350A, P4SMA350A-M3/5A delivers optimal balance of compact SMA footprint, AEC-Q101 qualification, halogen-free compliance, and verified 400 W surge handling-making it ideal for automotive OBCs, telecom line cards, and industrial PLCs where size, reliability, and regulatory alignment are jointly prioritized.
Availability
P4SMA350A-M3/5A is available at Aetrix Electronics and suitable for industrial DC power supplies, telecom line card surge protection, renewable energy inverters, and automotive on-board chargers requiring stable component supply, halogen-free compliance, and AEC-Q101 validation.
Supply support for P4SMA350A-M3/5A 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, MOSFETs, and protection devices with emphasis on reliability, precision, and application-specific optimization.
The P4SMA series is engineered for robust transient suppression in high-reliability power conversion and signal line protection, targeting automotive, industrial, and telecom markets where consistent clamping performance and long-term stability are mandatory.
FAQ
What is the maximum clamping voltage of the P4SMA350A-M3/5A under a 10/1000 µs surge?
The P4SMA350A-M3/5A has a maximum clamping voltage (VC) of 482 V at its rated peak pulse current (IPPM) of 0.62 A under the standardized 10/1000 µs waveform. This value is measured per Figure 1 in Vishay document 88367 and defines the upper voltage limit imposed on protected circuitry during surge events. The P4SMA350A-M3/5A maintains this clamping performance across its specified operating temperature range and after repeated surge exposures when mounted per recommended pad layout.
Is the P4SMA350A-M3/5A AEC-Q101 qualified?
Yes, the P4SMA350A-M3/5A carries AEC-Q101 qualification under revision "B" (as noted in the ordering information table on page 3 of Vishay document 88367). This qualification covers temperature cycling, humidity testing, mechanical shock, and surge endurance specific to automotive electronics. The "M3" suffix confirms halogen-free, RoHS-compliant construction aligned with automotive material requirements, and the "/5A" denotes 13-inch tape-and-reel packaging.
What does the "M3" suffix mean in P4SMA350A-M3/5A?
The "M3" suffix in P4SMA350A-M3/5A indicates halogen-free, RoHS-compliant construction with matte tin-plated leads that meet JESD201 Class 2 whisker resistance. It distinguishes the part from "E3" (RoHS-compliant but not halogen-free) and "HM3" (halogen-free + AEC-Q101 qualified). For P4SMA350A-M3/5A, the "M3" reflects both environmental compliance and suitability for commercial and automotive applications where halogen content is restricted.
Can the P4SMA350A-M3/5A be used in bidirectional configurations?
No, the P4SMA350A-M3/5A is a unidirectional TVS diode, as confirmed by its "A" suffix and absence of "CA" designation. Bidirectional variants in the P4SMA family use the "CA" suffix (e.g., P4SMA350CA). Using P4SMA350A-M3/5A in bidirectional circuits would result in forward conduction during negative transients, potentially damaging the device or failing to protect the circuit. Always verify polarity marking (cathode band) during placement.
What is the thermal resistance (RθJA) of the P4SMA350A-M3/5A, and how does it affect layout?
The P4SMA350A-M3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Thermal Characteristics table. This value assumes minimal copper area; increasing pad size or adding internal ground planes reduces RθJA. Layout must allocate sufficient copper to maintain junction temperature below 150 °C during repetitive surge events, especially in enclosed or high-ambient environments.
P4SMA350A-M3/5A 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):
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA350A-M3/5A FAQ
1.How can I place an order for P4SMA350A-M3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA350A-M3/5A 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 P4SMA350A-M3/5A reliable?
The price and inventory of P4SMA350A-M3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA350A-M3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA350A-M3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA350A-M3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA350A-M3/5A?
P4SMA350A-M3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA350A-M3/5A 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 P4SMA350A-M3/5A?
For technical support, including P4SMA350A-M3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA350A-M3/5A requirements.
6.How does Aetrix verify that P4SMA350A-M3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA350A-M3/5A 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 P4SMA350A-M3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA350A-M3/5A?
All P4SMA350A-M3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA350A-M3/5A, 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 P4SMA350A-M3/5A part is unused and in its original packaging.
Return procedure for P4SMA350A-M3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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