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Vishay General Semiconductor - Diodes Division P4SMA300AHE3_A/I
- Part No.:
- P4SMA300AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA300AHE3_A/I.pdf
- Description:
- TVS DIODE 256VWM 414VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,072
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Product details
Overview
P4SMA300AHE3_A/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection of sensitive electronics. It features a 300 V standoff voltage (VWM), 315 V maximum breakdown voltage (VBR), 400 W peak pulse power (10/1000 µs), and clamps transients to ≤414 V at 0.73 A peak pulse current - deployed on power rails and signal lines in industrial motor drives and telecom infrastructure.
For engineers reviewing the P4SMA300AHE3_A/I datasheet, P4SMA300AHE3_A/I pinout, P4SMA300AHE3_A/I application, or P4SMA300AHE3_A/I equivalent, key selection criteria include its AEC-Q101 qualification, low thermal resistance (RθJL = 30 °C/W), unidirectional polarity with cathode band marking, and suitability for automotive-grade ESD/surge protection where stable clamping and MSL Level 1 reflow compatibility are required.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 µA leakage at 300 V), then rapidly avalanches below 315 V to divert surge energy away from downstream ICs. Its glass-passivated junction ensures stable breakdown and fast response (<1 ns), while the SMA package supports automated SMT placement and meets UL 94 V-0 flammability rating.
Rated for 150 °C max junction temperature and 40 A non-repetitive forward surge (8.3 ms half-sine), the P4SMA300AHE3_A/I delivers 3.3 W steady-state power dissipation on infinite heatsink at 50 °C ambient. Its temperature coefficient of VBR is +0.110 %/°C, enabling predictable clamping behavior across industrial temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 300 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin for 277 V AC mains or 300 V DC bus protection. |
| VBR (Breakdown Voltage) | 285–315 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering without premature conduction during nominal operation. |
| VC (Clamping Voltage) | ≤414 V at IPPM = 0.73 A (10/1000 µs) - Actual voltage seen by protected circuit during surge; limits stress on downstream MOSFETs or controllers. |
| PPPM (Peak Pulse Power) | 400 W - Energy-handling capacity per IEEE C62.41-compliant surge event; sufficient for IEC 61000-4-5 Level 3 (1 kV/2 Ω) transients. |
| ID (Reverse Leakage) | ≤1.0 µA at VWM - Negligible standby current; avoids loading of high-impedance sensor bias networks or battery-powered circuits. |
| TJ max | 150 °C - Enables operation in under-hood automotive or enclosed industrial enclosures without derating below full power. |
| AEC-Q101 Qualified | Yes - Validated for automotive electronic modules requiring robustness against temperature cycling, humidity, and mechanical shock. |
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 black band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink node | Connected to protected line (e.g., 300 V rail); conducts avalanche current to ground during overvoltage events. |
| Anode (unbanded end) | Reference / return path | Typically tied to system ground or low-side reference; completes clamping path with minimal inductance for fast transient suppression. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Handles repeated lightning-induced surges in telecom base stations without degradation, per IEC 61000-4-5. |
| Glass passivated junction | Ensures long-term stability of VBR and low leakage across 1000+ thermal cycles; critical for automotive under-hood reliability. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without preconditioning; eliminates moisture-related popcorning risk. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive powertrain and body electronics; includes stress testing for temperature cycling, HAST, and mechanical shock. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD >15 kV), improving protection margin for 3.3 V/5 V logic interfaces. |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of IGBT gate drivers and DC-link voltage sensing circuits against switching-induced transients in 300 V-rated inverters. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed across DC-link capacitor or gate resistor network to clamp voltage spikes <100 ns after onset. Use Value: Prevents false triggering or destruction of gate drivers by limiting transient voltage to ≤414 V, preserving system uptime and reducing field failure rates. |
Use Scenario: Input-stage surge protection for 300 V DC telecom rectifiers exposed to induced surges on AC mains input or battery backup lines. IC Role / Device Role / Timing Role: Primary clamping device on bulk DC output, coordinated with MOVs and fuses to absorb 400 W pulses without thermal runaway. Use Value: Maintains compliance with GR-1089-CORE Level 3 immunity requirements while enabling compact PCB layout due to SMA footprint. |
| Automotive Battery Management | Industrial PLC I/O Modules |
Use Scenario: Protection of cell voltage monitoring inputs in 12S–16S Li-ion BMS systems operating near 300 V total pack voltage. IC Role / Device Role / Timing Role: High-precision unidirectional TVS on analog front-end inputs to prevent ADC saturation or op-amp latch-up during load dump events. Use Value: Leverages AEC-Q101 qualification and ±0.110 %/°C VBR drift to ensure consistent clamping across -40 °C to +125 °C operating range. |
Use Scenario: Signal line protection for 24 V/48 V digital I/O channels in programmable logic controllers subjected to inductive kickback from solenoid loads. IC Role / Device Role / Timing Role: Secondary-level TVS on isolated CAN or RS-485 transceiver supply rails, clamping transients before they reach isolation barriers. Use Value: Provides 400 W surge handling without requiring external series impedance, simplifying design and reducing bill-of-materials count. |
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/VBR/VC specs, but rated for 400 W only up to 91 V; above 91 V, PPPM drops to 300 W per datasheet note (1). | Lacks AEC-Q101 qualification; suitable for commercial-grade industrial equipment but not automotive BMS or ADAS modules. | Select when cost sensitivity outweighs automotive qualification needs and peak surge energy remains ≤300 W. |
| 1.5SMC300A | Higher package thermal resistance (RθJA ≈ 150 °C/W vs. 120 °C/W), larger SMC (DO-214AB) footprint, and no AEC-Q101 option. | Designed for higher-power applications (1500 W), but requires more PCB area and lacks automotive validation. | Choose only if board space allows SMC and system-level surge testing confirms 1500 W capability is necessary. |
Compared with SMAJ300A-E3/5A and 1.5SMC300A, the P4SMA300AHE3_A/I uniquely combines AEC-Q101 qualification, SMA footprint efficiency, and guaranteed 400 W clamping performance at 300 V - making it the optimal choice for space-constrained, automotive-qualified, or high-reliability industrial designs.
Availability
P4SMA300AHE3_A/I is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive battery management systems, and PLC I/O modules requiring stable component supply with AEC-Q101 traceability and RoHS compliance.
Supply support for P4SMA300AHE3_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, and protection devices with emphasis on reliability, precision, and automotive-grade validation.
The P4SMA Series is engineered for high-energy transient suppression in harsh environments, targeting applications demanding AEC-Q101 qualification, low-profile SMT packaging, and stable clamping across wide temperature ranges.
FAQ
What is the clamping voltage of the P4SMA300AHE3_A/I at its rated peak pulse current?
The P4SMA300AHE3_A/I clamps to a maximum of 414 V when subjected to its specified peak pulse current of 0.73 A under a 10/1000 µs waveform. This value is measured per standard test conditions in the Vishay datasheet (Document Number: 88367, Rev. 09-Jan-2024) and reflects the actual voltage imposed on protected circuitry during surge events. The P4SMA300AHE3_A/I maintains this clamping performance consistently across its qualified operating temperature range.
Is the P4SMA300AHE3_A/I suitable for automotive applications?
Yes, the P4SMA300AHE3_A/I is AEC-Q101 qualified, as confirmed by its HE3 suffix and documentation in the Vishay P4SMA Series datasheet. It has undergone rigorous stress testing including temperature cycling, humidity, and mechanical shock, making it appropriate for automotive battery management systems, ADAS power supplies, and other under-hood or chassis-mounted electronics. The P4SMA300AHE3_A/I meets automotive reliability requirements without requiring additional qualification by the end user.
What does the "_A/I" suffix indicate in P4SMA300AHE3_A/I?
The "_A" denotes the revision level of the AEC-Q101 qualified variant, while "/I" specifies packaging in 13-inch diameter plastic tape and reel with a 7500-unit quantity per reel. This format aligns with Vishay's ordering nomenclature in Document Number 88367 and ensures compatibility with high-volume SMT assembly lines. The P4SMA300AHE3_A/I is RoHS-compliant and halogen-free per Vishay material categorization standards.
How does the P4SMA300AHE3_A/I compare to bidirectional TVS diodes in surge protection?
The P4SMA300AHE3_A/I is unidirectional and intended for DC line protection where polarity is fixed - such as 300 V DC bus rails - offering tighter VBR tolerance and lower leakage than equivalent bidirectional parts. Bidirectional variants (e.g., P4SMA300CA) are used for AC-coupled or floating signal lines. The P4SMA300AHE3_A/I's cathode band clearly identifies polarity, eliminating misorientation risk during placement and ensuring optimal clamping directionality.
What is the thermal resistance from junction to lead (RθJL) for the P4SMA300AHE3_A/I?
The P4SMA300AHE3_A/I has a typical junction-to-lead thermal resistance (RθJL) of 30 °C/W, as specified in the Thermal Characteristics table of the Vishay P4SMA Series datasheet. This low value enables efficient heat transfer to the PCB copper pads, supporting sustained power dissipation and enhancing reliability in thermally constrained layouts. The P4SMA300AHE3_A/I achieves this performance within its SMA (DO-214AC) package without requiring external heatsinking.
P4SMA300AHE3_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:
- 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/I FAQ
1.How can I place an order for P4SMA300AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA300AHE3_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 P4SMA300AHE3_A/I reliable?
The price and inventory of P4SMA300AHE3_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 P4SMA300AHE3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA300AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA300AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA300AHE3_A/I?
P4SMA300AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA300AHE3_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 P4SMA300AHE3_A/I?
For technical support, including P4SMA300AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA300AHE3_A/I requirements.
6.How does Aetrix verify that P4SMA300AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA300AHE3_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 P4SMA300AHE3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA300AHE3_A/I?
All P4SMA300AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA300AHE3_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 P4SMA300AHE3_A/I part is unused and in its original packaging.
Return procedure for P4SMA300AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA300AHE3_A/I Tags
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