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Vishay General Semiconductor - Diodes Division P4SMA300AHE3_A/H
- Part No.:
- P4SMA300AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA300AHE3_A/H.pdf
- Description:
- TVS DIODE 256VWM 414VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,128
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Product details
Overview
P4SMA300AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 300 V standoff voltage (VWM), 315 V maximum breakdown voltage (VBR), and 400 W peak pulse power (10/1000 µs). It delivers 0.73 A peak pulse current (IPPM) with 414 V clamping voltage (VC) and is AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the P4SMA300AHE3_A/H datasheet, P4SMA300AHE3_A/H pinout, P4SMA300AHE3_A/H application, or P4SMA300AHE3_A/H equivalent, this device serves as a robust, low-profile surge protector for high-voltage DC rails in automotive power modules, industrial sensor interfaces, and telecom line cards where precise clamping and MSL Level 1 reflow compatibility are required.
Technical Context
The P4SMA300AHE3_A/H operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve fast response time (<1 ns) and low incremental surge resistance. Its clamping behavior is defined by a 10/1000 µs double-exponential waveform, with thermal derating above 25 °C per Fig. 2 and junction-to-ambient thermal resistance of 120 °C/W.
Designed for placement on 0.2" × 0.2" copper pads per JEDEC standard, it supports automated SMT assembly and meets JESD 201 Class 2 whisker resistance. Polarity is marked by a cathode band; no marking applies to bidirectional variants - but P4SMA300AHE3_A/H is explicitly unidirectional per ordering code "A" and device marking "300A".
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 300 V - Maximum continuous reverse working voltage before clamping initiates; defines safe operating DC rail margin. |
| VBR (Breakdown Voltage) | 285–315 V at 1 mA - Tight 10% tolerance ensures predictable avalanche onset across production lots. |
| VC (Clamping Voltage) | 414 V at IPPM - Limits transient-induced stress on downstream MOSFETs or ICs during 400 W surge events. |
| IPPM (Peak Pulse Current) | 0.73 A (10/1000 µs) - Confirmed surge-handling capability under standardized lightning/surge test conditions. |
| PPPM (Peak Pulse Power) | 400 W - Sustains single-event transients without degradation when mounted per recommended pad layout. |
| TJ max. | 150 °C - Enables operation in under-hood automotive environments and industrial enclosures with elevated ambient temperatures. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
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 molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential node; enables unidirectional clamping from cathode to anode during overvoltage. |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 300 V DC bus); conducts surge current to anode when reverse voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges on high-voltage DC lines without derating below 91 V. |
| Glass passivated chip junction | Ensures stable leakage performance and long-term reliability under thermal cycling and humidity exposure. |
| MSL Level 1, 260 °C peak reflow | Supports lead-free reflow soldering without preconditioning; eliminates moisture-related popcorning risk. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain and body electronics where field failure is unacceptable. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients, improving protection margin for sensitive gate drivers. |
Applications
| Automotive Power Module Protection | Industrial Sensor Signal Line Guarding |
|---|---|
Use Scenario: Suppresses load-dump transients (up to 120 V) and alternator switching spikes on 24 V/48 V auxiliary power rails in ADAS ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between high-side switch output and chassis ground to clamp negative-going spikes and positive surges. Use Value: Prevents latch-up or gate oxide damage in SiC MOSFET drivers by limiting clamped voltage to ≤414 V during 400 W pulses. |
Use Scenario: Shields analog front-end inputs of pressure/temperature sensors in factory automation PLCs exposed to relay coil flyback. IC Role / Device Role / Timing Role: Standoff-rated TVS on 24 V supply line to sensor node, conducting only during >300 V excursions. Use Value: Maintains signal integrity by holding leakage <1 µA at 300 V, avoiding DC offset errors in precision 24-bit ADC measurements. |
| Telecom DC Feeder Line Protection | Renewable Energy Inverter DC Link Clamp |
Use Scenario: Protects PoE++ midspan injectors and remote radio units from induced lightning surges on -48 V DC distribution lines. IC Role / Device Role / Timing Role: Unidirectional TVS connected cathode-to-line, anode-to-ground to absorb common-mode transients up to 4 kV. Use Value: Achieves sub-1 ns response and 414 V clamping to prevent damage to isolated DC/DC controllers and Ethernet PHYs. |
Use Scenario: Clamps switching overvoltages on 600–1000 V DC link capacitors in solar string inverters during IGBT turn-off. IC Role / Device Role / Timing Role: High-VWM TVS placed across DC link to suppress dV/dt-induced voltage spikes exceeding 300 V. Use Value: Provides fail-safe clamping without leakage-induced capacitor discharge, preserving bus stability during MPPT transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ300A-E3/5A | Same VWM (300 V), identical SMA package, but rated for 400 W at 25 °C only (no AEC-Q101 qualification). | Lacks automotive qualification; suitable for commercial/industrial use where AEC compliance is not mandated. | Select SMAJ300A-E3/5A for cost-sensitive non-automotive designs requiring same electrical specs but no automotive validation. |
| 1.5SMC300A | Higher package thermal mass (DO-214AB), 400 W rating, but larger footprint (7.11 mm × 6.22 mm vs. SMA's 4.50 mm × 2.79 mm). | Requires PCB layout revision; better heat dissipation for repetitive surge duty, less suited for space-constrained modules. | Choose 1.5SMC300A only if board area permits and thermal management under sustained surge duty is prioritized over miniaturization. |
Compared with SMAJ300A-E3/5A and 1.5SMC300A, P4SMA300AHE3_A/H uniquely combines AEC-Q101 qualification, SMA footprint, and guaranteed 400 W clamping performance - making it the only option for automotive-grade, space-constrained 300 V TVS applications without layout or reliability compromise.
Availability
P4SMA300AHE3_A/H is available at Aetrix Electronics and suitable for automotive power modules, industrial sensor interfaces, telecom DC feeder lines, and renewable energy inverter DC links requiring stable component supply, AEC-Q101 traceability, and consistent surge performance across production batches.
Supply support for P4SMA300AHE3_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 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 targets high-reliability transient suppression in automotive, industrial, and telecom systems, designed to replace older axial-leaded TVS devices with compact, AEC-qualified surface-mount alternatives that maintain or exceed legacy surge ratings.
FAQ
What is the clamping voltage of P4SMA300AHE3_A/H at its rated peak pulse current?
The P4SMA300AHE3_A/H has a maximum clamping voltage (VC) of 414 V at its specified peak pulse current (IPPM) of 0.73 A under a 10/1000 µs waveform. This value is measured per Figure 1 in the official Vishay datasheet (Document Number: 88367) and defines the upper voltage limit imposed on protected circuitry during a standardized surge event. The clamping performance remains stable across temperature due to the device's low temperature coefficient of VBR (0.110 %/°C).
Is P4SMA300AHE3_A/H suitable for automotive applications?
Yes, P4SMA300AHE3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and revision notes indicating _A and _B variants are certified for automotive use. It undergoes stress testing including temperature cycling, highly accelerated life testing (HALT), and ESD verification per AEC-Q101 requirements, making it appropriate for under-hood and chassis-mounted electronics where reliability under thermal and mechanical stress is critical.
What does the "HE3" suffix in P4SMA300AHE3_A/H signify?
The "HE3" suffix in P4SMA300AHE3_A/H indicates RoHS-compliant construction with AEC-Q101 qualification and matte tin-plated leads meeting J-STD-002 solderability standards. The "H" denotes 7-inch tape-and-reel packaging (1800 units per reel), while "_A/H" specifies revision level "A" and packaging format "H". This distinguishes it from commercial-grade "E3" or halogen-free "HM3" variants.
How does P4SMA300AHE3_A/H differ from bidirectional TVS diodes like P4SMA300CA?
P4SMA300AHE3_A/H is unidirectional, with polarity marked by a cathode band and intended for DC line protection where reverse conduction must be blocked. In contrast, P4SMA300CA is bidirectional, offering symmetrical clamping for AC or floating lines, but with lower VWM (185 V max) and VBR (220 V max). The "A" suffix in P4SMA300AHE3_A/H confirms unidirectional configuration, and its 300 V VWM is incompatible with bidirectional operation.
What is the thermal resistance and mounting requirement for optimal performance of P4SMA300AHE3_A/H?
P4SMA300AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. Derating curves in Figure 2 require power reduction above 25 °C ambient; for continuous operation near TJ max (150 °C), thermal design must ensure junction temperature stays within limits using adequate copper area and airflow. No heatsink is required for single-pulse events.
P4SMA300AHE3_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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 256V
- Voltage - Breakdown (Min):
- 285V
- Voltage - Clamping (Max) @ Ipp:
- 414V
- Current - Peak Pulse (10/1000µs):
- 730mA
- 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)
P4SMA300AHE3_A/H FAQ
1.How can I place an order for P4SMA300AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA300AHE3_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 P4SMA300AHE3_A/H reliable?
The price and inventory of P4SMA300AHE3_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 P4SMA300AHE3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA300AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA300AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA300AHE3_A/H?
P4SMA300AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA300AHE3_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 P4SMA300AHE3_A/H?
For technical support, including P4SMA300AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA300AHE3_A/H requirements.
6.How does Aetrix verify that P4SMA300AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA300AHE3_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 P4SMA300AHE3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA300AHE3_A/H?
All P4SMA300AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA300AHE3_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 P4SMA300AHE3_A/H part is unused and in its original packaging.
Return procedure for P4SMA300AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA300AHE3_A/H Tags
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