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Vishay General Semiconductor - Diodes Division P4SMA20AHE3_A/H
- Part No.:
- P4SMA20AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA20AHE3_A/H.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,098
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Product details
Overview
P4SMA20AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 20 V standoff voltage (VWM), 21.0 V maximum breakdown voltage (VBR), and 400 W peak pulse power (10/1000 µs). It provides clamping protection for sensitive ICs and MOSFETs against inductive switching transients and ESD in automotive and industrial power rails.
For engineers reviewing the P4SMA20AHE3_A/H datasheet, P4SMA20AHE3_A/H pinout, P4SMA20AHE3_A/H application, or P4SMA20AHE3_A/H equivalent, this AEC-Q101 qualified TVS offers verified clamping voltage of 27.7 V at 14.4 A peak pulse current, low thermal resistance (RθJL = 30 °C/W), and RoHS-compliant matte tin-plated leads suitable for J-STD-002 soldering.
Technical Context
The P4SMA20AHE3_A/H operates as a unidirectional avalanche diode with cathode-banded polarity, designed to clamp transient overvoltages above its 21.0 V breakdown threshold while maintaining low leakage (<1.0 µA at 17.1 V). Its glass-passivated junction ensures stable performance under repetitive surge stress.
It delivers 400 W peak pulse power per 10/1000 µs waveform at TA = 25 °C (derated above 25 °C per Fig. 2), supports 40 A non-repetitive forward surge current (8.3 ms half-sine), and features a temperature coefficient of VBR at +0.090 %/°C - critical for thermal stability in automotive under-hood environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 17.1 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for protected line. |
| VBR (Breakdown Voltage) | 19.0–21.0 V at 1.0 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 27.7 V at IPPM = 14.4 A - Measured peak voltage across device during 10/1000 µs surge; directly limits stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 400 W - Sustained energy absorption capability under standard lightning/surge waveform; enables robust protection in 12 V/24 V systems. |
| ID (Reverse Leakage) | <1.0 µA at VWM - Minimal standby current draw; preserves signal integrity and battery life in always-on circuits. |
| TJ max. | +150 °C - Rated junction temperature; supports operation in AEC-Q101 automotive environments including engine control units. |
| RθJL | 30 °C/W - Low junction-to-lead thermal resistance; enables efficient heat transfer to PCB copper pads without heatsink. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads. Cathode identified by black band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when voltage exceeds VBR. |
| Anode (unbanded end) | Reference node | Typically tied to system ground or low-impedance return path; completes clamping loop during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including powertrain and body electronics per stress test requirements. |
| 400 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth) without degradation when mounted on 5.0 mm × 5.0 mm copper pads. |
| Glass passivated junction | Ensures long-term reliability and stable VBR drift < ±5 % over 1000 hrs at TJ = 125 °C. |
| MSL Level 1 (J-STD-020) | Zero moisture sensitivity; allows unlimited floor life and reflow at 260 °C peak without popcorn failure. |
| RoHS-compliant & halogen-free option | P4SMA20AHE3_A/H meets EU RoHS Directive 2011/65/EU and IEC 61249-2-21:2013 for brominated flame retardants. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply lines feeding engine control modules (ECMs) against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND, clamping transients before they reach LDOs and microcontrollers. Use Value: Limits peak rail voltage to ≤27.7 V during 400 W surges, preventing latch-up or gate oxide damage in downstream 3.3 V/5 V logic. |
Use Scenario: Safeguarding analog inputs of pressure/temperature sensors connected to PLC I/O modules. IC Role / Device Role / Timing Role: TVS installed at sensor connector interface to shunt ESD (IEC 61000-4-2 ±8 kV contact) and inductive kickback from solenoid drivers. Use Value: Sub-1 µA leakage at 17.1 V avoids measurement offset; 27.7 V clamping prevents ADC saturation and input-stage damage. |
| Telecom DC Power Input Protection | Consumer Device USB Port Protection |
Use Scenario: Securing -48 V telecom rectifier outputs against lightning-induced surges on central office equipment. IC Role / Device Role / Timing Role: Unidirectional TVS on primary DC bus, coordinated with upstream fuses and secondary MOVs for staged protection. Use Value: 400 W rating handles multiple 10/1000 µs surges per IEC 61643-21; 150 °C TJ rating supports operation in sealed, high-temp enclosures. |
Use Scenario: Adding transient immunity to USB VBUS lines in portable speakers and smart home hubs. IC Role / Device Role / Timing Role: TVS placed immediately after USB connector, before USB switch or charging IC, to absorb ESD and hot-plug spikes. Use Value: Low capacitance (<100 pF at VWM) avoids USB 2.0 signal integrity degradation; SMA package enables automated placement in space-constrained designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A-E3/5A | Same VWM (17.1 V), identical SMA package, but rated for 400 W at 25 °C only (no AEC-Q101 qualification); RθJL = 35 °C/W. | Lacks automotive qualification; suitable for commercial/industrial use where AEC-Q101 is not mandated. | Select SMAJ20A-E3/5A for cost-sensitive non-automotive designs requiring same clamping performance without automotive validation. |
| 1.5SMC20A | 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); VBR min/max tighter (19.0–20.0 V). | Requires PCB layout change; better suited for high-reliability industrial systems needing higher surge endurance margin. | Choose 1.5SMC20A only if board space permits larger package and higher thermal inertia is required for repetitive surge duty cycles. |
Compared with SMAJ20A-E3/5A and 1.5SMC20A, the P4SMA20AHE3_A/H uniquely combines AEC-Q101 qualification, MSL Level 1 handling, and compact SMA footprint - making it the optimal choice for automotive Tier-1 suppliers and space-constrained industrial controllers requiring certified surge immunity.
Availability
P4SMA20AHE3_A/H is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, telecom DC input safeguarding, and consumer USB port transient suppression requiring stable component supply across production lifecycles.
Supply support for P4SMA20AHE3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The P4SMA Series targets high-volume transient suppression in automotive, industrial, and telecom infrastructure, engineered for AEC-Q101 compliance, automated assembly, and consistent clamping behavior under real-world surge conditions.
FAQ
What is the clamping voltage of P4SMA20AHE3_A/H at its rated peak pulse current?
The P4SMA20AHE3_A/H has a maximum clamping voltage (VC) of 27.7 V when subjected to its rated peak pulse current (IPPM) of 14.4 A under the standard 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet 88367 and defines the upper voltage limit imposed on protected circuitry during surge events. The P4SMA20AHE3_A/H maintains this clamping performance across its full operating temperature range.
Is P4SMA20AHE3_A/H qualified for automotive applications?
Yes, P4SMA20AHE3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and revision notes in document 88367. It undergoes stress testing for temperature cycling, humidity bias, mechanical shock, and high-temperature operating life per AEC-Q101 standards. This makes P4SMA20AHE3_A/H suitable for under-hood and chassis-mounted automotive electronics where reliability under thermal and vibration stress is mandatory.
What is the maximum reverse leakage current for P4SMA20AHE3_A/H at its stand-off voltage?
The P4SMA20AHE3_A/H exhibits a maximum reverse leakage current (ID) of 1.0 µA when biased at its stand-off voltage (VWM) of 17.1 V and tested at TA = 25 °C. This low leakage ensures minimal power loss and signal distortion in always-on circuits such as automotive CAN bus terminations or sensor bias networks. The P4SMA20AHE3_A/H maintains leakage below 5 µA even at TJ = 125 °C per derating curves.
Does P4SMA20AHE3_A/H have a bidirectional variant?
No, P4SMA20AHE3_A/H is strictly unidirectional, indicated by the "A" suffix in its part number. Bidirectional variants use the "CA" suffix (e.g., P4SMA20CA). The P4SMA20AHE3_A/H features a cathode band for polarity identification and is intended for DC rail protection where surge direction is known - such as positive supply lines referenced to ground. Using it in AC or floating applications requires explicit circuit-level verification.
What is the thermal resistance from junction to lead (RθJL) for P4SMA20AHE3_A/H?
The P4SMA20AHE3_A/H has a typical junction-to-lead thermal resistance (RθJL) of 30 °C/W, as specified in the Thermal Characteristics table of Vishay document 88367. This low value enables efficient heat conduction from the silicon die to the PCB copper pads via the matte tin-plated leads, supporting reliable operation at full 400 W pulse power when mounted per recommended 5.0 mm × 5.0 mm pad layout. The P4SMA20AHE3_A/H achieves this without requiring external heatsinking.
P4SMA20AHE3_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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 14.4A
- Power - Peak Pulse:
- 400W
- 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)
P4SMA20AHE3_A/H FAQ
1.How can I place an order for P4SMA20AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA20AHE3_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 P4SMA20AHE3_A/H reliable?
The price and inventory of P4SMA20AHE3_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 P4SMA20AHE3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA20AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA20AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA20AHE3_A/H?
P4SMA20AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA20AHE3_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 P4SMA20AHE3_A/H?
For technical support, including P4SMA20AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA20AHE3_A/H requirements.
6.How does Aetrix verify that P4SMA20AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA20AHE3_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 P4SMA20AHE3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA20AHE3_A/H?
All P4SMA20AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA20AHE3_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 P4SMA20AHE3_A/H part is unused and in its original packaging.
Return procedure for P4SMA20AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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