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Vishay General Semiconductor - Diodes Division P4SMA300AHM3_A/H
- Part No.:
- P4SMA300AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA300AHM3_A/H.pdf
- Description:
- TVS DIODE 256VWM 414VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,442
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Product details
Overview
P4SMA300AHM3_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 minimum breakdown voltage (VBR), and 400 W peak pulse power (10/1000 μs). It delivers 0.73 A peak pulse current (IPPM) with 414 V maximum clamping voltage (VC), and is AEC-Q101 qualified for automotive-grade reliability in power line and signal line surge protection.
For engineers reviewing the P4SMA300AHM3_A/H datasheet, P4SMA300AHM3_A/H pinout, P4SMA300AHM3_A/H application, or P4SMA300AHM3_A/H equivalent, this page provides verified electrical parameters, thermal derating behavior, clamping performance under transient stress, and validated automotive qualification status - all critical for ESD/surge protection design in harsh-environment electronics.
Technical Context
The P4SMA300AHM3_A/H operates as a unidirectional avalanche-clamping device, leveraging glass-passivated junction technology to achieve fast response (<1 ns) and low incremental surge resistance. Its 300 V stand-off rating enables use in high-voltage DC bus lines, while its 414 V clamping voltage at 0.73 A ensures safe voltage limiting during IEC 61000-4-5 surge events.
Thermally, it features RθJA = 120 °C/W and RθJL = 30 °C/W, with derated peak power above 25 °C per Figure 2. The device is rated for TJ = -65 to +150 °C and meets MSL Level 1 (260 °C reflow peak), supporting automated SMT assembly without moisture sensitivity concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 300 V - Maximum continuous reverse working voltage before clamping begins; defines operating margin for 300 V DC systems. |
| VBR (Breakdown) | 285–315 V at IT = 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during overvoltage transients. |
| VC (Clamping) | 414 V at IPPM = 0.73 A (10/1000 μs) - Maximum voltage seen by protected circuit during worst-case surge; determines downstream component voltage rating. |
| PPPM | 400 W (10/1000 μs waveform) - Peak transient energy handling capacity; supports IEC 61000-4-5 Level 4 immunity testing. |
| ID (Leakage) | 1.0 μA max at VWM - Ultra-low reverse leakage preserves system efficiency and battery life in always-on circuits. |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and industrial power supplies with elevated ambient temperatures. |
| AEC-Q101 | Qualified - Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to ground or low-side reference in unidirectional TVS configuration; carries forward surge current during clamping. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 300 V rail); initiates avalanche breakdown when voltage exceeds VBR, shunting surge to ground. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable avalanche characteristics and long-term reliability under repeated surge stress without parameter drift. |
| 400 W peak pulse power (10/1000 μs) | Supports robust protection against lightning-induced surges and inductive switching transients in industrial and automotive power rails. |
| AEC-Q101 qualification (HM3 suffix) | Validated for automotive-grade temperature cycling, humidity, and mechanical shock - required for under-hood and chassis-mounted designs. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow assembly without preconditioning; eliminates moisture-related popcorning risk. |
| Halogen-free & RoHS-compliant (HM3) | Meets global environmental compliance requirements for automotive OEMs and industrial equipment manufacturers. |
Applications
| Automotive Power Distribution | Industrial DC Bus Protection |
|---|---|
|
Use Scenario: Protecting 24 V and 48 V auxiliary power rails in vehicle ECUs against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery input and DC-DC converter input stage. Use Value: Limits transient voltage to ≤414 V during 120 V/500 ms load dump events, preventing damage to downstream PMICs and microcontrollers. |
Use Scenario: Safeguarding 300 V DC link in motor drives and solar inverters from switching spikes and grid surges. IC Role / Device Role / Timing Role: High-voltage TVS connected across DC bus terminals to absorb repetitive 400 W pulses. Use Value: Maintains system uptime by clamping transients within 1 ns, avoiding false triggering of overvoltage shutdown circuits. |
| Telecom Line Interface | Medical Sensor Signal Conditioning |
|
Use Scenario: Shielding RS-485/RS-232 data lines in outdoor telecom cabinets exposed to induced lightning surges. IC Role / Device Role / Timing Role: Standoff-rated TVS placed at connector entry point, referenced to local ground plane. Use Value: Provides 300 V DC blocking with <1 μA leakage, preserving signal integrity while diverting >0.7 A surge currents away from transceivers. |
Use Scenario: Protecting analog front-end inputs of patient monitoring devices from ESD and electrocautery interference. IC Role / Device Role / Timing Role: Low-leakage unidirectional TVS on isolated sensor supply rails (e.g., ±15 V or +24 V). Use Value: Ensures <1 μA reverse leakage at 300 V standoff, eliminating offset drift in precision amplifiers and ADC reference paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ300A-E3/5A | Same VWM (300 V), same SMA package, but lower PPPM (400 W), no AEC-Q101 qualification, commercial-grade only. | Lacks automotive qualification; unsuitable for under-hood or safety-critical modules requiring AEC-Q101 traceability. | Select when cost-sensitive industrial designs require identical clamping but do not mandate automotive reliability testing. |
| 1.5SMC300A | Higher package thermal resistance (RθJA ≈ 150 °C/W vs. 120 °C/W), same VWM/VC, but DO-214AB (SMB) package - larger footprint and higher profile. | Requires PCB layout change due to SMB footprint; less suitable for space-constrained automotive modules. | Choose only if existing board uses SMB pads and thermal margin allows higher RθJA; otherwise avoid for new AEC-Q101 designs. |
Compared with SMAJ300A-E3/5A and 1.5SMC300A, the P4SMA300AHM3_A/H uniquely combines AEC-Q101 qualification, halogen-free construction, MSL Level 1 compatibility, and optimized thermal resistance - making it the preferred choice for next-generation automotive and industrial systems demanding full compliance and compact SMT integration.
Availability
P4SMA300AHM3_A/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial DC bus protection, telecom line interface, and medical sensor signal conditioning requiring stable component supply, long-term lifecycle support, and AEC-Q101 traceability.
Supply support for P4SMA300AHM3_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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series is designed for high-reliability transient suppression in automotive, industrial, and telecom systems - delivering consistent clamping performance, AEC-Q101 validation, and robust SMT manufacturability in the SMA package.
FAQ
What is the maximum clamping voltage of the P4SMA300AHM3_A/H under standard test conditions?
The P4SMA300AHM3_A/H has a maximum clamping voltage (VC) of 414 V when subjected to a 10/1000 μs waveform at its rated peak pulse current of 0.73 A. This value is measured per JEDEC standards and reflects the highest voltage the protected circuit will experience during a defined surge event. The P4SMA300AHM3_A/H maintains this clamping performance across its specified operating temperature range and is validated per AEC-Q101 stress tests.
Is the P4SMA300AHM3_A/H suitable for automotive applications?
Yes, the P4SMA300AHM3_A/H is AEC-Q101 qualified and specifically designed for automotive use, as confirmed by its HM3 suffix and documentation in Vishay's P4SMA series datasheet (Rev. 09-Jan-2024). It supports under-hood and chassis-mounted applications including engine control units, body control modules, and ADAS sensor interfaces. The P4SMA300AHM3_A/H also meets MSL Level 1 and operates from -65 °C to +150 °C, fulfilling key automotive environmental requirements.
What does the "HM3" suffix indicate in P4SMA300AHM3_A/H?
The "HM3" suffix in P4SMA300AHM3_A/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification - distinguishing it from commercial-grade variants like E3 or M3. The "_A/H" indicates revision A and 7-inch tape-and-reel packaging (1800 units per reel). This full ordering code ensures traceability to Vishay's automotive-grade manufacturing lot controls and environmental compliance certifications required by Tier 1 suppliers.
How does the thermal performance of P4SMA300AHM3_A/H compare to similar TVS diodes?
The P4SMA300AHM3_A/H features RθJA = 120 °C/W and RθJL = 30 °C/W, which is superior to many competing SMA-packaged TVS diodes (e.g., typical RθJA ≥ 140 °C/W). This lower thermal resistance allows higher sustained power dissipation and improved reliability in thermally constrained layouts. Derating curves in the P4SMA300AHM3_A/H datasheet confirm usable power down to 70 % at 100 °C ambient, enabling deployment in high-temperature automotive and industrial enclosures.
Can P4SMA300AHM3_A/H be used in bidirectional configurations?
No, the P4SMA300AHM3_A/H is a unidirectional TVS diode, as indicated by its "A" suffix and cathode band marking. Bidirectional variants in the P4SMA family use the "CA" suffix (e.g., P4SMA300CA). Using the P4SMA300AHM3_A/H in reverse-biased AC applications would result in forward conduction and potential failure. For bidirectional protection at 300 V, select P4SMA300CAHE3_A/H or equivalent - the P4SMA300AHM3_A/H must be oriented with cathode toward the protected line.
P4SMA300AHM3_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):
- 256V
- Voltage - Breakdown (Min):
- 285V
- Voltage - Clamping (Max) @ Ipp:
- 414V
- Current - Peak Pulse (10/1000µs):
- 730mA
- 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)
P4SMA300AHM3_A/H FAQ
1.How can I place an order for P4SMA300AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA300AHM3_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 P4SMA300AHM3_A/H reliable?
The price and inventory of P4SMA300AHM3_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 P4SMA300AHM3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA300AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA300AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA300AHM3_A/H?
P4SMA300AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA300AHM3_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 P4SMA300AHM3_A/H?
For technical support, including P4SMA300AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA300AHM3_A/H requirements.
6.How does Aetrix verify that P4SMA300AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA300AHM3_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 P4SMA300AHM3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA300AHM3_A/H?
All P4SMA300AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA300AHM3_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 P4SMA300AHM3_A/H part is unused and in its original packaging.
Return procedure for P4SMA300AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA300AHM3_A/H Tags
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