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Vishay General Semiconductor - Diodes Division P4SMA350AHM3_A/I
- Part No.:
- P4SMA350AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA350AHM3_A/I.pdf
- Description:
- TVS DIODE 300VWM 482VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,407
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Product details
Overview
P4SMA350AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) in the P4SMA series, designed for clamping high-energy transients on power 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 (IPPM), and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies and automotive control units.
For engineers reviewing the P4SMA350AHM3_A/I datasheet, P4SMA350AHM3_A/I pinout, P4SMA350AHM3_A/I application, or P4SMA350AHM3_A/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, SMA (DO-214AC) package dimensions, thermal resistance data, and real-world protection use cases - all confirmed from Vishay's official P4SMA Series specification document (Rev. 09-Jan-2024, Doc. #88367).
Technical Context
The P4SMA350AHM3_A/I operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology for stable breakdown behavior under repetitive surge conditions. Its clamping action begins at 368 V (VBR min) and limits transient voltage to ≤482 V at 0.62 A (IPPM), with low incremental surge resistance ensuring minimal voltage overshoot during fast-rising ESD or inductive-switching events.
Rated for 400 W peak pulse power (10/1000 µs), it sustains 300 W above 91 V per derating curve, and exhibits 0.110 %/°C temperature coefficient of VBR. It is halogen-free, RoHS-compliant, and AEC-Q101 qualified (suffix HM3 denotes automotive-grade qualification), with MSL Level 1 moisture sensitivity and 260 °C lead-free reflow compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 300 V - Maximum continuous reverse working voltage before conduction begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 333–368 V at 1 mA - Confirmed avalanche onset range; ensures predictable clamping initiation across temperature and unit variation. |
| VC (Clamping Voltage) | 482 V at IPPM = 0.62 A - Peak voltage seen by protected circuit during worst-case 10/1000 µs transient; determines downstream component stress. |
| PPPM (Peak Pulse Power) | 400 W (10/1000 µs) - Energy-handling capacity for single or low-duty-cycle surges; derates to 300 W above 91 V per fig. 2. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs PCB layout and thermal derating requirements. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or high-ambient industrial environments. |
| AEC-Q101 Qualified | Yes (HM3 suffix) - Validated for automotive electronics per stress test requirements including HTRB, HTGB, and temperature cycling. |
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. Cathode indicated by band; polarity critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to ground or low-side reference in unidirectional TVS configuration; must be routed with low-inductance path. |
| Cathode | Current exit point during reverse-biased clamping | Connected to protected line (e.g., 24 V rail or CAN bus); band-marked end defines polarity orientation on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 24 V systems without derating penalties below 91 V. |
| Glass passivated chip junction | Ensures long-term stability of VBR and leakage current over temperature and lifetime, critical for automotive and industrial field reliability. |
| AEC-Q101 qualified (HM3) | Validated for automotive applications including engine control modules, body electronics, and ADAS sensors requiring zero-failure tolerance. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without pre-baking; eliminates moisture-related popcorning risk during manufacturing. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast transients (<1 ns rise time), improving protection margin for sensitive gate drivers and ADC inputs. |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Suppresses load-dump transients (up to 120 V, 400 ms) and alternator ripple spikes on 24 V input rails feeding DC-DC converters. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and ground, clamping surges before they reach primary-side controller ICs. Use Value: Limits voltage to ≤482 V during 0.62 A surge, preventing latch-up or gate oxide damage in buck controllers rated for 65 V absolute max. |
Use Scenario: Protects LIN bus transceivers and microcontroller I/O pins from ESD (±8 kV contact) and ISO 10605 pulses in door module assemblies. IC Role / Device Role / Timing Role: Placed on LIN signal line (pin 1) with cathode to line and anode to chassis ground, providing sub-1 ns response to fast transients. Use Value: Clamps ESD-induced voltage to <482 V within nanoseconds, maintaining signal integrity while meeting AEC-Q101 stress test requirements. |
| Telecom Remote Radio Unit (RRU) | Industrial Sensor Interface Protection |
Use Scenario: Shields 48 V DC power input of outdoor RRU enclosures from lightning-induced surges coupled via long feeder cables. IC Role / Device Role / Timing Role: First-stage clamping device upstream of DC-DC converter, sized to absorb 400 W pulses without thermal runaway. Use Value: Withstands repeated 10/1000 µs surges up to 400 W while maintaining VWM = 300 V - enabling >20 % headroom above nominal 48 V supply. |
Use Scenario: Safeguards analog outputs (0–10 V, 4–20 mA) of pressure/temperature transmitters exposed to inductive kickback from solenoid valves. IC Role / Device Role / Timing Role: Connected across output terminals (cathode to signal+, anode to signal−), diverting transient energy away from precision op-amps and DACs. Use Value: Low leakage (<1 µA at 300 V) prevents output drift; 482 V clamping protects 36 V-rated op-amps without external series resistance. |
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 (300 V), VBR (333–368 V), VC (482 V), but rated 400 W only up to 91 V; 300 W above 91 V - identical power rating to P4SMA350AHM3_A/I. | No AEC-Q101 qualification; commercial-grade only; not approved for automotive under-hood use. | Select SMAJ350A for cost-sensitive industrial or telecom applications where automotive qualification is unnecessary. |
| 1.5SMC350A | Higher package thermal resistance (RθJA ≈ 150 °C/W vs. 120 °C/W); same electrical specs but larger SMC (DO-214AB) footprint. | Requires larger PCB area; less suitable for dense automotive ECUs; no AEC-Q101 variant available in this family. | Choose 1.5SMC350A only if existing layout uses SMC pads and thermal margin allows higher RθJA. |
Compared with SMAJ350A and 1.5SMC350A, the P4SMA350AHM3_A/I uniquely combines AEC-Q101 qualification, SMA (DO-214AC) compactness, and verified 400 W capability at 350 V - making it the only drop-in solution for space-constrained automotive modules requiring production-grade reliability.
Availability
P4SMA350AHM3_A/I is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, telecom remote radio units, and industrial sensor interfaces requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P4SMA350AHM3_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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and automotive-grade validation.
The P4SMA series was developed specifically for high-reliability transient suppression in automotive, industrial, and telecom infrastructure - delivering consistent clamping performance, AEC-Q101 compliance, and optimized thermal behavior in the compact SMA package.
FAQ
What is the maximum clamping voltage of the P4SMA350AHM3_A/I under a 10/1000 µs surge?
The P4SMA350AHM3_A/I has a maximum clamping voltage (VC) of 482 V when subjected to its rated peak pulse current (IPPM) of 0.62 A with a 10/1000 µs waveform. This value is measured per Figure 1 in Vishay's P4SMA Series datasheet (Doc. #88367, Rev. 09-Jan-2024) and defines the upper voltage limit imposed on protected circuits during standardized surge events. The P4SMA350AHM3_A/I maintains this clamping performance across its operational temperature range and after repeated surges due to its glass-passivated junction construction.
Is the P4SMA350AHM3_A/I qualified for automotive applications?
Yes, the P4SMA350AHM3_A/I is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's P4SMA Series datasheet (Rev. 09-Jan-2024). The HM3 designation indicates halogen-free, RoHS-compliant construction with full AEC-Q101 stress testing - including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling - making the P4SMA350AHM3_A/I suitable for under-hood and body electronics in passenger vehicles and commercial vehicles.
What does the "_A/I" suffix mean in P4SMA350AHM3_A/I?
The "_A/I" suffix in P4SMA350AHM3_A/I specifies two attributes: "A" denotes the revision level (Revision A, per ordering table footnote 2), and "I" indicates packaging in 13-inch diameter plastic tape and reel, with a base quantity of 7500 units. This matches Vishay's documented ordering convention in the P4SMA Series datasheet (page 3), where "I" corresponds to the 7500-unit reel format - critical for automated SMT placement in high-volume production of the P4SMA350AHM3_A/I.
What is the thermal resistance of the P4SMA350AHM3_A/I, and how does it affect PCB layout?
The P4SMA350AHM3_A/I 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 of the Vishay P4SMA datasheet. This value requires designers to allocate sufficient copper area and consider airflow or adjacent heat sources - undersized pads increase junction temperature, potentially derating the 400 W pulse rating or accelerating parametric drift. The P4SMA350AHM3_A/I's RθJA directly impacts sustained surge repetition rate and long-term reliability in enclosed enclosures.
How does the P4SMA350AHM3_A/I differ from the P4SMA350A-E3 variant?
The P4SMA350AHM3_A/I differs from P4SMA350A-E3 in three key aspects: (1) HM3 denotes halogen-free + AEC-Q101 qualification, whereas E3 is commercial-grade RoHS only; (2) _A/I specifies Revision A in 7500-unit 13" reels, while E3/61 indicates Revision A in 1800-unit 7" reels; (3) HM3 undergoes additional automotive stress screening (e.g., HTRB at 150 °C for 1000 hrs), which E3 does not. These distinctions make the P4SMA350AHM3_A/I appropriate for automotive safety-critical systems where the P4SMA350A-E3 would not be approved.
P4SMA350AHM3_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:
- 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/I FAQ
1.How can I place an order for P4SMA350AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA350AHM3_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 P4SMA350AHM3_A/I reliable?
The price and inventory of P4SMA350AHM3_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 P4SMA350AHM3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA350AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA350AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA350AHM3_A/I?
P4SMA350AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA350AHM3_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 P4SMA350AHM3_A/I?
For technical support, including P4SMA350AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA350AHM3_A/I requirements.
6.How does Aetrix verify that P4SMA350AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA350AHM3_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 P4SMA350AHM3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA350AHM3_A/I?
All P4SMA350AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA350AHM3_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 P4SMA350AHM3_A/I part is unused and in its original packaging.
Return procedure for P4SMA350AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA350AHM3_A/I Tags
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