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Vishay General Semiconductor - Diodes Division P4KA9.1AHE3/54
- Part No.:
- P4KA9.1AHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KA9.1AHE3/54.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:3,046
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Product details
Overview
P4KA9.1AHE3/54 from Vishay General Semiconductor is a unidirectional automotive-grade transient voltage suppressor (TVS) diode in DO-204AL (DO-41) package, rated for 400 W peak pulse power (10/1000 µs), 9.55 V maximum breakdown voltage at 1 mA, 13.4 V clamping voltage at 29.9 A peak surge current, and qualified to AEC-Q101 for under-hood electronics protection.
For engineers reviewing the P4KA9.1AHE3/54 datasheet, P4KA9.1AHE3/54 pinout, P4KA9.1AHE3/54 application, or P4KA9.1AHE3/54 equivalent, this part delivers verified clamping performance in automotive sensor signal lines, MOSFET gate protection, and 12 V rail transient suppression where high-temperature stability (TJ up to +185 °C) and low incremental surge resistance are critical.
Technical Context
The P4KA9.1AHE3/54 employs Vishay's patented PAR® construction for stable avalanche behavior under repetitive transients and operates exclusively in unidirectional polarity with cathode indicated by color band. Its 10/1000 µs waveform response supports IEC 61000-4-5 Level 4 compliance when applied with appropriate PCB layout.
Designed for automotive environments, it features 185 °C maximum junction temperature, 0.068 %/°C temperature coefficient of VBR, and meets JESD201 Class 2 whisker resistance - enabling reliable operation in engine control units, body electronics, and ADAS sensor interfaces exposed to load dump and ISO 7637-2 pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 400 W - sustains single or low-duty-cycle surges per ISO 7637-2 without degradation |
| Breakdown Voltage VBR | 8.65–9.55 V at 1 mA - defines precise avalanche initiation threshold for 12 V system protection |
| Clamping Voltage VC | 13.4 V at 29.9 A - limits downstream IC voltage during 10/1000 µs transients to safe levels |
| Stand-off Voltage VWM | 7.78 V - ensures no conduction during normal 12 V rail operation including cold-crank dips |
| Operating Temperature Range | −65 °C to +185 °C - supports placement near heat sources in automotive powertrain modules |
| Surge Current IPPM | 29.9 A (10/1000 µs) - withstands typical load-dump energy without failure |
| Leakage Current ID | ≤10 µA at 7.78 V - minimizes standby power loss in always-on vehicle networks |
Pinout & Package
DO-204AL (DO-41) molded epoxy package with matte tin-plated leads; cathode denoted by axial color band. Lead finish complies with J-STD-002 and JESD22-B102 solderability standards; passes JESD201 Class 2 whisker test.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-impedance return path; forms clamping loop with cathode |
| Cathode | Protected line connection | Connected to signal/power line requiring transient suppression; color band identifies this end |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Ensures consistent avalanche characteristics over lifetime and temperature, eliminating parameter drift in harsh automotive cycles |
| AEC-Q101 qualification | Validated for automotive use via stress testing including HTOL, TCT, and ESD - required for ECUs and ADAS modules |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns), improving protection margin for sensitive CMOS inputs |
| RoHS-compliant HE3 suffix | Meets automotive supply chain requirements with lead-free assembly compatibility and whisker-resistant plating |
| UL 94 V-0 molding compound | Prevents flame propagation in enclosed engine bay enclosures during fault conditions |
Applications
| Automotive Engine Control Unit (ECU) | ADAS Camera Sensor Interface |
|---|---|
Use Scenario: Protects microcontroller I/O and CAN transceiver pins from load dump and alternator ripple in gasoline/diesel engine bays. IC Role / Device Role / Timing Role: Unidirectional TVS clamps positive-going transients on 5 V/3.3 V logic rails while remaining non-conductive during cold-crank (−18 V). Use Value: Enables reliable operation at 185 °C ambient with <10 µA leakage, preventing false resets and communication faults. |
Use Scenario: Shields MIPI CSI-2 differential pairs and power pins of image sensors against ESD and switching noise from nearby actuators. IC Role / Device Role / Timing Role: Fast-response clamping (sub-nanosecond) limits voltage excursion to ≤13.4 V, preserving signal integrity in high-speed video links. Use Value: Low capacitance (typ. 100 pF at VWM) avoids signal rise-time degradation on 1.5 Gbps data lanes. |
| Body Control Module (BCM) Power Input | Automotive Infotainment USB Port |
Use Scenario: Installed on 12 V input rail upstream of DC/DC converters to absorb ISO 7637-2 Pulse 5a/b energy. IC Role / Device Role / Timing Role: Absorbs 400 W peak pulses without thermal runaway, maintaining VWM = 7.78 V to avoid dropout during cranking. Use Value: High reliability under 1000+ thermal cycles validated per AEC-Q101, ensuring 15-year field life. |
Use Scenario: Placed on VBUS and D+/D− lines of USB 2.0 ports in head units to meet IEC 61000-4-2 Level 4 ESD immunity. IC Role / Device Role / Timing Role: Clamps ±15 kV contact discharge to <20 V within 1 ns, protecting USB PHY and controller from latch-up. Use Value: Uni-directional configuration prevents forward conduction during 5 V bus operation while delivering full ESD robustness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ9.0A | Lower PPPM (400 W same), but VBR min/max 8.1–8.91 V; not AEC-Q101 qualified | Approved for industrial/commercial use only; lacks automotive qualification and high-temp derating data | Select when AEC-Q101 is not required and cost sensitivity outweighs qualification needs |
| 1.5KE9.1A | Same DO-41 package, but 1500 W rating; higher VC = 14.4 V at 104 A; larger junction capacitance | Better for high-energy surges but less suitable for high-speed signal lines due to slower response and higher capacitance | Choose for bulk power rail protection where speed and capacitance are secondary to energy handling |
Compared with SMAJ9.0A and 1.5KE9.1A, the P4KA9.1AHE3/54 uniquely combines AEC-Q101 qualification, 185 °C operation, and tight 8.65–9.55 V VBR tolerance - making it the only option certified for direct integration into automotive safety-critical sensor and control modules without additional qualification effort.
Availability
P4KA9.1AHE3/54 is available at Aetrix Electronics and suitable for automotive engine control units, ADAS camera interfaces, and body control module designs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for P4KA9.1AHE3/54 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 high-reliability diodes, MOSFETs, and optoelectronics for automotive, industrial, and computing markets.
The P4KA9.1AHE3/54 belongs to Vishay's automotive TVS diode family engineered specifically for AEC-Q101 compliance and under-hood transient suppression - targeting robustness against load dump, ISO 7637-2 pulses, and ESD in safety-critical vehicle subsystems.
FAQ
What is the maximum junction temperature rating for the P4KA9.1AHE3/54?
The P4KA9.1AHE3/54 has a maximum junction temperature (TJ) of +185 °C, validated per AEC-Q101 stress testing. This allows direct mounting on high-temperature PCB areas near power stages or engine compartments without thermal derating penalties below that limit. The P4KA9.1AHE3/54 maintains specified clamping performance across its full −65 °C to +185 °C operating range.
Is the P4KA9.1AHE3/54 unidirectional or bidirectional?
The P4KA9.1AHE3/54 is unidirectional only, as confirmed in the Vishay datasheet Document Number 88364. It conducts only during positive transients on the cathode side and blocks reverse voltage up to its stand-off rating of 7.78 V. This configuration is optimized for 12 V automotive systems where negative transients are handled separately or suppressed by other means.
Does the P4KA9.1AHE3/54 meet AEC-Q101 qualification?
Yes, the P4KA9.1AHE3/54 is explicitly AEC-Q101 qualified, as stated in the "Mechanical Data" section of the Vishay datasheet. The HE3 suffix denotes high-reliability, automotive-grade construction meeting all required stress tests including high-temperature operating life, temperature cycling, and ESD. This makes the P4KA9.1AHE3/54 suitable for safety-critical automotive applications without further qualification.
What is the clamping voltage of the P4KA9.1AHE3/54 at its rated peak pulse current?
The P4KA9.1AHE3/54 has a maximum clamping voltage (VC) of 13.4 V at its rated peak pulse current (IPPM) of 29.9 A using the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream components see limited overvoltage during transient events - critical for protecting 3.3 V and 5 V logic interfaces in automotive ECUs and sensors.
What packaging format is used for the P4KA9.1AHE3/54?
The P4KA9.1AHE3/54 is supplied in 13-inch diameter paper tape and reel packaging, with a base quantity of 5500 units per reel (ordering code /54). The device uses DO-204AL (DO-41) package with matte tin-plated leads compliant with J-STD-002 and JESD22-B102, and passes JESD201 Class 2 whisker testing for automotive assembly reliability.
P4KA9.1AHE3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AL, DO-41, Axial
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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 ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
P4KA9.1AHE3/54 FAQ
1.How can I place an order for P4KA9.1AHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KA9.1AHE3/54 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 P4KA9.1AHE3/54 reliable?
The price and inventory of P4KA9.1AHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KA9.1AHE3/54 is usually 5 days.
3.What payment methods are accepted for P4KA9.1AHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KA9.1AHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KA9.1AHE3/54?
P4KA9.1AHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KA9.1AHE3/54 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 P4KA9.1AHE3/54?
For technical support, including P4KA9.1AHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KA9.1AHE3/54 requirements.
6.How does Aetrix verify that P4KA9.1AHE3/54 is sourced from the original manufacturer or authorized distributors?
All P4KA9.1AHE3/54 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 P4KA9.1AHE3/54 meets industry standards.
7.What is the process for return or replacement of P4KA9.1AHE3/54?
All P4KA9.1AHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with P4KA9.1AHE3/54, 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 P4KA9.1AHE3/54 part is unused and in its original packaging.
Return procedure for P4KA9.1AHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KA9.1AHE3/54 Tags
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