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Vishay General Semiconductor - Diodes Division P4SMA350A-M3/61
- Part No.:
- P4SMA350A-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA350A-M3/61.pdf
- Description:
- TVS DIODE 300VWM 482VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA350A-M3/61 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-voltage surge protection in power rails and signal lines. It features a 350 V standoff voltage (VWM), 368 V minimum breakdown voltage (VBR), 482 V maximum clamping voltage (VC) at 0.62 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - suitable for protecting industrial motor drives and telecom power supplies against lightning-induced transients.
For engineers reviewing the P4SMA350A-M3/61 datasheet, P4SMA350A-M3/61 pinout, P4SMA350A-M3/61 application, or P4SMA350A-M3/61 equivalent, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, thermal resistance (RθJA = 120 °C/W), unidirectional polarity marking, SMA (DO-214AC) package compatibility with automated placement, and halogen-free RoHS compliance per M3 suffix.
Technical Context
The P4SMA350A-M3/61 operates as a silicon avalanche diode that enters controlled breakdown above its specified VBR (333–368 V), limiting transient overvoltage across protected circuitry. Its low incremental surge resistance ensures stable clamping under high-current surges, while fast response time (<1 ns) enables suppression before downstream components experience overstress.
This device is rated for non-repetitive 10/1000 µs waveform pulses up to 400 W (derated to 300 W above 91 V), with junction temperature range from –65 °C to +150 °C and maximum reverse leakage of 1.0 µA at 300 V. It meets J-STD-020 MSL Level 1 and is halogen-free per Vishay's M3 material specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 300 V - Maximum continuous reverse operating voltage before significant leakage; defines upper limit of normal circuit operation. |
| VBR (Breakdown Voltage) | 333–368 V at 1.0 mA - Voltage at which avalanche conduction begins; ensures reliable triggering above system nominal voltage. |
| VC (Clamping Voltage) | 482 V at IPPM = 0.62 A - Peak voltage seen by protected load during surge; must remain below downstream component's absolute max rating. |
| PPPM (Peak Pulse Power) | 400 W (10/1000 µs) - Surge energy handling capacity; determines survivability against IEC 61000-4-5 Level 4 transients. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs derating requirements above 25 °C ambient. |
| Package | SMA (DO-214AC) - Surface-mount outline with cathode band marking; compatible with standard SMT reflow profiles and pick-and-place equipment. |
| Compliance | Halogen-free, RoHS-compliant (M3 suffix); meets AEC-Q101 qualification for automotive-grade reliability (Revision B). |
Pinout & Package
SMA (DO-214AC) package: molded plastic case with matte tin-plated leads, cathode indicated by a band on the body. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H), lead pitch 2.54 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to lower-potential side of protected line. | Provides low forward voltage drop (VF ≈ 3.5 V at 25 A) during surge conduction path. |
| Cathode | Current exit terminal in forward bias; marked with band; connected to higher-potential side (e.g., VBUS). | Defines unidirectional polarity - blocks reverse current until breakdown threshold is exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 combination wave surges without degradation over rated lifetime. |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes overvoltage stress on downstream MOSFETs or controllers during clamping event. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking - reduces manufacturing overhead. |
| Halogen-free construction (M3) | Meets strict environmental compliance for industrial and automotive end equipment without sacrificing surge performance. |
| AEC-Q101 qualified (Revision B) | Validated for automotive power electronics applications requiring extended temperature cycling and long-term reliability. |
Applications
| Industrial Motor Drives | Telecom DC Power Supplies |
|---|---|
Use Scenario: Protection of IGBT gate drivers and bus voltage sensing circuits against switching-induced voltage spikes and lightning surges on 300–400 V DC bus lines. IC Role / Device Role / Timing Role: Unidirectional TVS placed between bus rail and ground, triggered only during overvoltage events to shunt surge current away from sensitive control ICs. Use Value: Clamps transients to ≤482 V, maintaining safe margin below 600 V-rated gate drivers and isolated amplifiers. |
Use Scenario: Input-stage surge suppression on -48 V or +54 V telecom rectifier outputs exposed to induced surges from nearby AC mains or antenna coupling. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing repetitive 10/1000 µs transients up to 400 W without thermal runaway. Use Value: Withstands 1.0 µA leakage at 300 V, ensuring minimal standby power loss while providing rapid sub-nanosecond response. |
| Renewable Energy Inverters | Railway Signaling Systems |
Use Scenario: DC-link protection in solar string inverters where PV array transients couple into 600–1000 V intermediate bus rails. IC Role / Device Role / Timing Role: High-VBR unidirectional TVS used in parallel with bulk capacitors to clamp fast-rising transients before they propagate to DC-DC converters. Use Value: 368 V min VBR ensures no false triggering during normal MPPT voltage fluctuations; 482 V VC limits stress on 650 V SiC MOSFETs. |
Use Scenario: Protection of 110 V DC signaling interfaces in trackside cabinets subjected to EFT/burst and surge per EN 50121-4. IC Role / Device Role / Timing Role: Primary-level TVS on field-side I/O lines, coordinated with secondary GDT or MOV stages for staged energy absorption. Use Value: AEC-Q101 qualification ensures reliability under vibration, thermal cycling, and humidity conditions typical of rail infrastructure deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ350A | Same VWM (350 V), identical SMA package, but 400 W rating uses 10/1000 µs waveform with 0.01% duty cycle; RθJA = 120 °C/W. | No AEC-Q101 qualification; commercial-grade only; not validated for automotive or harsh-environment use. | Select when cost sensitivity outweighs automotive qualification requirements and full M3 halogen-free compliance is not mandated. |
| 1.5SMC350A | Higher power rating (1500 W), larger SMC (DO-214AB) package, same VWM/VBR range; RθJA = 70 °C/W. | Requires PCB layout change due to larger footprint and higher thermal mass; suited for higher-energy surge environments. | Choose when system-level surge testing exceeds 400 W capability and board space allows SMC footprint. |
Compared with SMAJ350A, P4SMA350A-M3/61 adds AEC-Q101 qualification and halogen-free construction without sacrificing clamping performance; versus 1.5SMC350A, it trades peak power for smaller size and tighter thermal management - ideal for space-constrained industrial modules needing certified reliability.
Availability
P4SMA350A-M3/61 is available at Aetrix Electronics and suitable for industrial motor drives, telecom DC power supplies, renewable energy inverters, and railway signaling systems requiring stable component supply, halogen-free compliance, and AEC-Q101 reliability validation.
Supply support for P4SMA350A-M3/61 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 high-reliability, high-efficiency, and application-specific optimization.
The P4SMA Series targets high-voltage transient suppression in space-constrained surface-mount applications, balancing power handling, clamping precision, and manufacturability for industrial, telecom, and automotive electronics.
FAQ
What is the maximum clamping voltage of the P4SMA350A-M3/61 under surge conditions?
The P4SMA350A-M3/61 has a maximum clamping voltage (VC) of 482 V when subjected to its rated peak pulse current of 0.62 A using the 10/1000 µs waveform. This value is measured at the device terminals and represents the highest voltage imposed on the protected circuit during transient suppression. The P4SMA350A-M3/61 maintains this clamping performance across its specified operating temperature range and is validated per JEDEC test conditions.
Is the P4SMA350A-M3/61 suitable for automotive applications?
Yes, the P4SMA350A-M3/61 is AEC-Q101 qualified (Revision B), confirming its suitability for automotive power electronics including engine control units, battery management systems, and ADAS power rails. Its halogen-free M3 construction, MSL Level 1 rating, and guaranteed operation from –65 °C to +150 °C meet stringent automotive reliability requirements. The P4SMA350A-M3/61 is explicitly listed in Vishay's AEC-Q101 qualified product matrix for high-voltage TVS applications.
What does the "M3" suffix indicate in P4SMA350A-M3/61?
The "M3" suffix in P4SMA350A-M3/61 denotes halogen-free, RoHS-compliant construction meeting Vishay's material standard for environmentally restricted substances. It also signifies compliance with JESD201 Class 2 whisker resistance and J-STD-020 MSL Level 1 handling. Unlike E3-suffixed variants, M3 parts contain no brominated flame retardants or chlorine-based compounds - critical for industrial and automotive customers with strict chemical compliance mandates. The P4SMA350A-M3/61 carries full traceability for these attributes.
How does the thermal resistance of the P4SMA350A-M3/61 affect PCB layout?
The P4SMA350A-M3/61 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. To maintain safe junction temperatures under repeated surge events, designers must allocate adequate copper area and avoid thermal bottlenecks in traces. The P4SMA350A-M3/61 datasheet specifies minimum pad dimensions and recommends thermal vias for high-duty-cycle applications - failure to follow these guidelines risks premature thermal failure during sustained transient activity.
Can the P4SMA350A-M3/61 be used in bidirectional configurations?
No, the P4SMA350A-M3/61 is a unidirectional TVS diode, identifiable by its cathode band marking. Bidirectional operation requires a CA-suffixed variant such as P4SMA350CA. Using the P4SMA350A-M3/61 in reverse-biased configurations will result in forward conduction and potential damage, as it lacks symmetrical breakdown characteristics. The P4SMA350A-M3/61 is engineered exclusively for single-polarity surge suppression on positive rails or grounded-return paths.
P4SMA350A-M3/61 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-M3/61 FAQ
1.How can I place an order for P4SMA350A-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA350A-M3/61 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-M3/61 reliable?
The price and inventory of P4SMA350A-M3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA350A-M3/61 is usually 5 days.
3.What payment methods are accepted for P4SMA350A-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA350A-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA350A-M3/61?
P4SMA350A-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA350A-M3/61 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-M3/61?
For technical support, including P4SMA350A-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA350A-M3/61 requirements.
6.How does Aetrix verify that P4SMA350A-M3/61 is sourced from the original manufacturer or authorized distributors?
All P4SMA350A-M3/61 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-M3/61 meets industry standards.
7.What is the process for return or replacement of P4SMA350A-M3/61?
All P4SMA350A-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA350A-M3/61, 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-M3/61 part is unused and in its original packaging.
Return procedure for P4SMA350A-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA350A-M3/61 Tags
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