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Vishay General Semiconductor - Diodes Division P4SMA9.1AHE3_A/H
- Part No.:
- P4SMA9.1AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA9.1AHE3_A/H.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,589
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Product details
Overview
P4SMA9.1AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 9.1 V breakdown voltage (VBR = 8.65–9.55 V at IT = 1.0 mA), 7.78 V maximum stand-off voltage (VWM), 13.4 V clamping voltage (VC) at 29.9 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the P4SMA9.1AHE3_A/H datasheet, P4SMA9.1AHE3_A/H pinout, P4SMA9.1AHE3_A/H application, or P4SMA9.1AHE3_A/H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 120 °C/W), polarity marking convention, and real-world protection use cases - all confirmed from Vishay's official P4SMA Series document #88367 (Rev. 09-Jan-2024).
Technical Context
The P4SMA9.1AHE3_A/H operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling fast response (<1 ns) to ESD and inductive switching transients. The device is rated for repetitive 400 W pulses (duty cycle 0.01%) on 0.2" × 0.2" copper pads and derates linearly above TA = 25 °C per Fig. 2.
It complies with AEC-Q101 stress testing for automotive applications and meets UL 94 V-0 flammability requirements. With a maximum junction temperature of 150 °C and JESD201 Class 2 whisker resistance, it supports high-reliability placement in engine control units, ADAS sensor interfaces, and industrial PLC I/O modules where robust overvoltage immunity is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 8.65 V / 9.55 V at IT = 1.0 mA - defines precise clamping onset threshold for reliable overvoltage detection |
| VWM | 7.78 V - maximum continuous reverse operating voltage before leakage exceeds 50 µA |
| VC @ IPPM | 13.4 V at 29.9 A - clamped voltage during 10/1000 µs surge, limiting downstream component stress |
| PPPM | 400 W - peak transient power handling capability under standard lightning-surge waveform |
| IFSM | 40 A - single half-sine surge current rating (8.3 ms), supporting inrush and fault-current events |
| RθJA | 120 °C/W - thermal resistance from junction to ambient, critical for PCB pad layout and power derating |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band; anode is unmarked end. Molding compound meets UL 94 V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased terminal | Connected to protected line; conducts during overvoltage to shunt current to ground |
| Anode (unbanded end) | Reference/ground terminal | Typically tied to system ground or low-impedance return path for effective clamping |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables protection against IEC 61000-4-5 Level 4 surges without external series impedance |
| Glass passivated junction | Ensures stable VBR over lifetime and improved moisture resistance vs. epoxy-passivated alternatives |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive under-hood and chassis applications requiring extended temperature and reliability compliance |
| MSL Level 1 (260 °C reflow) | Supports standard lead-free SMT assembly without preconditioning or special handling |
| Low incremental surge resistance | Minimizes VC overshoot during fast transients, improving protection margin for 3.3 V/5 V logic |
Applications
| Automotive Engine Control Unit (ECU) Power Input | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protects 12 V supply rail from load-dump spikes (up to 35 V, 100 ms) and alternator ripple in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC/DC converter input stage. Use Value: Clamps transients to ≤13.4 V, preventing damage to 16 V-rated input capacitors and LDO regulators. |
Use Scenario: Shields 24 V digital input channels from field-wiring induced surges in factory automation systems. IC Role / Device Role / Timing Role: Standoff protection device mounted at connector entry point before optocoupler or Schmitt trigger. Use Value: Limits voltage seen by input conditioning circuitry to safe levels while maintaining <50 µA leakage at 24 V nominal. |
| Consumer Appliance Motor Drive Board | Telecom Base Station Sensor Interface |
Use Scenario: Suppresses inductive kickback from brushed DC motor commutation in washing machine control boards. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals and H-bridge power FETs. Use Value: Absorbs 400 W transient energy within nanoseconds, preventing gate oxide rupture in MOSFETs. |
Use Scenario: Guards RS-485 transceiver I/O pins against ESD and lightning-induced surges in outdoor telecom cabinets. IC Role / Device Role / Timing Role: Secondary protection stage after gas discharge tube (GDT), placed adjacent to PHY IC. Use Value: Provides low-clamping-voltage backup with sub-1 ns response, ensuring data integrity during 8 kV contact ESD events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0A | Higher VWM (7.75 V), same VBR range (8.5–9.4 V), SMB package (larger footprint, lower RθJA = 85 °C/W) | Better thermal performance in high-duty-cycle environments; requires larger PCB area | Select when board space allows and sustained surge repetition is expected |
| 1.5SMC9.0A | Same VBR/VWM, higher PPPM (1500 W), SMC package (DO-214AB), RθJA = 60 °C/W | Designed for higher-energy threats (e.g., ISO 7637-2 Pulse 5a); not AEC-Q101 qualified | Choose for non-automotive industrial systems needing greater surge headroom |
Compared with SMBJ9.0A and 1.5SMC9.0A, the P4SMA9.1AHE3_A/H offers AEC-Q101 qualification and SMA footprint compatibility for space-constrained automotive modules, while delivering sufficient 400 W clamping for most load-switching and ESD scenarios - making it optimal for cost-sensitive, volume automotive and industrial designs where qualification and size are prioritized over extreme surge capacity.
Availability
P4SMA9.1AHE3_A/H is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC I/O modules, and consumer appliance motor drive boards requiring stable component supply, AEC-Q101 compliance, and consistent TVS performance across production batches.
Supply support for P4SMA9.1AHE3_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 targets cost-effective, high-volume transient suppression in automotive, industrial, and consumer electronics - engineered for automated SMT placement, AEC-Q101 qualification, and robust performance under real-world surge conditions.
FAQ
What is the breakdown voltage tolerance of the P4SMA9.1AHE3_A/H?
The P4SMA9.1AHE3_A/H has a breakdown voltage (VBR) range of 8.65 V to 9.55 V at test current IT = 1.0 mA, corresponding to ±5% tolerance around the nominal 9.1 V rating. This tight VBR spread ensures predictable clamping behavior across production lots and supports accurate system-level overvoltage margin analysis in designs using the P4SMA9.1AHE3_A/H.
Is the P4SMA9.1AHE3_A/H suitable for automotive applications?
Yes, the P4SMA9.1AHE3_A/H is AEC-Q101 qualified, as confirmed by its HE3 suffix and documentation in Vishay's P4SMA Series datasheet #88367. It undergoes stress testing for temperature cycling, high-temperature reverse bias, and ESD, making it appropriate for under-hood and chassis-mounted automotive electronics where reliability under harsh thermal and electrical conditions is mandatory - including use in ECUs, body control modules, and ADAS sensor interfaces containing the P4SMA9.1AHE3_A/H.
What is the maximum clamping voltage of the P4SMA9.1AHE3_A/H during a surge event?
The P4SMA9.1AHE3_A/H exhibits a maximum clamping voltage (VC) of 13.4 V at peak pulse current (IPPM) = 29.9 A, measured with a 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during standardized surge events and directly determines the safe operating margin for downstream components such as 16 V-rated input capacitors or 5 V logic ICs sharing the same rail protected by the P4SMA9.1AHE3_A/H.
Does the P4SMA9.1AHE3_A/H have a bidirectional variant?
No - the P4SMA9.1AHE3_A/H is strictly unidirectional, indicated by the "A" suffix and cathode band marking. Bidirectional variants use the "CA" suffix (e.g., P4SMA9.1CA). The unidirectional configuration of the P4SMA9.1AHE3_A/H makes it ideal for DC power rail protection where polarity is fixed, unlike AC or differential signal lines that require symmetrical clamping in both directions - a function not supported by the P4SMA9.1AHE3_A/H.
What is the thermal resistance of the P4SMA9.1AHE3_A/H, and how does it affect layout?
The P4SMA9.1AHE3_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. This value dictates PCB copper area requirements: reducing pad size increases junction temperature rise under power dissipation, potentially exceeding the 150 °C max TJ. Layouts for the P4SMA9.1AHE3_A/H must therefore allocate adequate copper to maintain safe operation during repetitive surge events.
P4SMA9.1AHE3_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):
- 7.78V
- Voltage - Breakdown (Min):
- 8.65V
- Voltage - Clamping (Max) @ Ipp:
- 13.4V
- Current - Peak Pulse (10/1000µs):
- 29.9A
- 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)
P4SMA9.1AHE3_A/H FAQ
1.How can I place an order for P4SMA9.1AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA9.1AHE3_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 P4SMA9.1AHE3_A/H reliable?
The price and inventory of P4SMA9.1AHE3_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 P4SMA9.1AHE3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA9.1AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA9.1AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA9.1AHE3_A/H?
P4SMA9.1AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA9.1AHE3_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 P4SMA9.1AHE3_A/H?
For technical support, including P4SMA9.1AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA9.1AHE3_A/H requirements.
6.How does Aetrix verify that P4SMA9.1AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA9.1AHE3_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 P4SMA9.1AHE3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA9.1AHE3_A/H?
All P4SMA9.1AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA9.1AHE3_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 P4SMA9.1AHE3_A/H part is unused and in its original packaging.
Return procedure for P4SMA9.1AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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