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Vishay General Semiconductor - Diodes Division P4KA11AHE3/73
- Part No.:
- P4KA11AHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KA11AHE3/73.pdf
- Description:
- TVS DIODE 9.4VWM 15.6VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:3,878
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Product details
Overview
P4KA11AHE3/73 from Vishay General Semiconductor is a unidirectional automotive-grade transient voltage suppressor (TVS) diode in DO-204AL (DO-41) package, featuring 10.5 V to 11.6 V breakdown voltage (VBR), 15.6 V clamping voltage (VC) at 25.6 A peak pulse current, and 400 W peak pulse power (10/1000 µs). It is AEC-Q101 qualified for under-hood automotive electronics protection against inductive switching transients.
For engineers reviewing the P4KA11AHE3/73 datasheet, P4KA11AHE3/73 pinout, P4KA11AHE3/73 application, or P4KA11AHE3/73 equivalent, this page delivers verified electrical specs, thermal derating behavior, RoHS-compliant packaging details, and validated alternatives for automotive ESD/surge protection design-in.
Technical Context
This TVS diode uses Vishay's patented PAR® construction for stable clamping under high-temperature operation up to +185 °C junction temperature. Its unidirectional polarity and low incremental surge resistance enable fast response (<1 ns) to transients while maintaining tight VBR tolerance (±5.3% at 1.0 mA test current).
The device complies with ANSI/IEEE C62.35 for surge testing and is rated for 40 A non-repetitive forward surge (8.3 ms half-sine), with 1.5 W steady-state power dissipation on infinite heatsink at TL = 75 °C. Its matte tin-plated leads meet J-STD-002 and JESD22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 10.5 V / 11.6 V at 1.0 mA - defines precise clamping onset threshold for overvoltage detection |
| VC @ IPPM | 15.6 V at 25.6 A - maximum voltage seen by protected circuit during 400 W transient event |
| PPPM | 400 W (10/1000 µs waveform) - peak surge energy handling capacity for automotive load-dump immunity |
| IFSM | 40 A (8.3 ms half-sine) - robustness against repetitive inrush or fault currents in power rails |
| TJ max. | +185 °C - enables placement near hot engine-control units without derating loss |
| VWM | 9.40 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| Temp. Coeff. of VBR | 0.075 %/°C - predictable VBR drift across automotive temperature range (−40 °C to +150 °C) |
Pinout & Package
Package: DO-204AL (DO-41), molded epoxy case with UL 94 V-0 flammability rating; cathode indicated by color band; matte tin-plated leads compliant with J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to system ground in unidirectional TVS configuration | Enables low-VF (3.5 V @ 25 A) path during surge conduction to shunt energy safely |
| Cathode | Current exit point in forward bias; connected to protected line (e.g., 12 V rail or signal) | Defines polarity-sensitive clamping: conducts only when cathode voltage exceeds anode by ≥VBR |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Ensures stable VBR and low dynamic impedance across 1000+ surge cycles at 185 °C junction temperature |
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, humidity bias, and mechanical shock per stress test plan |
| 400 W peak pulse power (10/1000 µs) | Meets ISO 7637-2 Pulse 5a (load dump) requirements for 12 V systems without external series impedance |
| Low clamping ratio (VC/VBR ≈ 1.43) | Minimizes overvoltage margin needed for downstream ICs like CAN transceivers or microcontrollers |
| RoHS-compliant HE3 suffix | Meets JESD201 Class 2 whisker resistance and EU Directive 2002/95/EC for lead-free assembly compatibility |
Applications
| Automotive Power Rail Protection | Engine Control Unit (ECU) Input Protection |
|---|---|
Use Scenario: Suppressing load-dump transients (up to 60 V, 400 ms) on 12 V battery-fed circuits in passenger vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC converter input. Use Value: Clamps peak voltage to ≤15.6 V, preventing damage to 16 V-rated input stages of buck regulators. |
Use Scenario: Protecting analog sensor inputs (e.g., MAP, TPS) from inductive kickback in engine bay wiring harnesses. IC Role / Device Role / Timing Role: TVS mounted at ECU connector interface, upstream of op-amp front-end. Use Value: Sub-1 ns response limits voltage overshoot to <16 V, preserving 12-bit ADC accuracy and avoiding latch-up. |
| Body Control Module (BCM) Signal Line Guarding | Automotive Lighting Circuit Surge Suppression |
Use Scenario: Shielding LIN bus lines from ESD and relay-switching noise in door module assemblies. IC Role / Device Role / Timing Role: Discrete TVS on each LIN data line, referenced to local ground plane. Use Value: 15.6 V clamping ensures LIN transceiver (e.g., TJA1020) remains within absolute max ratings during ±30 kV contact discharge. |
Use Scenario: Preventing LED driver IC failure due to back-EMF from halogen headlamp relays. IC Role / Device Role / Timing Role: TVS across relay coil terminals and/or driver output stage. Use Value: 40 A IFSM rating withstands repeated 12 V/5 A lamp turn-off surges without degradation over 10-year vehicle life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11A-E3/5AT | Same VBR range (10.5–11.6 V), but lower PPPM = 400 W (same rating), higher VC = 17.0 V, DO-214AC package | Surface-mount alternative; requires PCB rework for through-hole P4KA11AHE3/73 designs | Select when board space is constrained and reflow assembly is used; verify thermal pad layout for 1.5 W dissipation |
| 1N6267A | Legacy axial-leaded TVS; VBR = 10.0–12.2 V, VC = 16.5 V @ 24.2 A, PPPM = 400 W, same DO-41 package but not AEC-Q101 qualified | Non-automotive grade; lacks high-temp reliability validation and whisker-resistant plating | Acceptable for industrial or consumer prototypes; avoid in production automotive programs requiring AEC-Q101 documentation |
Compared with SMAJ11A-E3/5AT and 1N6267A, the P4KA11AHE3/73 provides guaranteed AEC-Q101 compliance, tighter VBR tolerance, and validated 185 °C operation-critical for engine compartment deployment where long-term reliability outweighs minor cost differences.
Availability
P4KA11AHE3/73 is available at Aetrix Electronics and suitable for automotive power rail protection, engine control unit (ECU) input safeguarding, and body control module (BCM) signal line guarding requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for P4KA11AHE3/73 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 passive components for demanding industrial and automotive environments.
The P4KA11AHE3/73 belongs to Vishay's automotive TVS diode family engineered specifically for AEC-Q101 compliance and under-hood transient suppression-targeting robustness against load dump, inductive switching, and ESD in 12 V and 24 V vehicle architectures.
FAQ
What is the clamping voltage of the P4KA11AHE3/73 at its rated peak pulse current?
The P4KA11AHE3/73 has a maximum clamping voltage (VC) of 15.6 V at its rated peak pulse current (IPPM) of 25.6 A, measured using the standardized 10/1000 µs waveform. This value ensures protected downstream components-such as automotive microcontrollers or CAN transceivers-remain within their absolute maximum voltage ratings during surge events. The low VC directly supports reliable operation in 12 V systems where headroom is limited.
Is the P4KA11AHE3/73 qualified for automotive applications?
Yes, the P4KA11AHE3/73 is explicitly AEC-Q101 qualified, as confirmed in Vishay document 88364. It undergoes rigorous stress testing-including temperature cycling, high-temperature reverse bias, and mechanical shock-to ensure reliability in under-hood automotive environments. Its 185 °C maximum junction temperature and HE3 suffix (JESD201 Class 2 whisker resistance) further validate its suitability for production automotive programs.
What does the "HE3" suffix indicate in P4KA11AHE3/73?
The "HE3" suffix in P4KA11AHE3/73 denotes a RoHS-compliant, high-reliability variant meeting JESD201 Class 2 whisker resistance requirements and conforming to EU Directive 2002/95/EC. It specifies matte tin-plated leads qualified per J-STD-002 and JESD22-B102, enabling robust solder joint integrity in lead-free reflow processes-essential for automotive manufacturing and long-term field reliability.
Can the P4KA11AHE3/73 be used in bidirectional configurations?
No, the P4KA11AHE3/73 is unidirectional only, as stated in the Vishay datasheet. Its electrical characteristics-including breakdown voltage and clamping behavior-are specified for reverse-biased operation only. For bidirectional transient suppression (e.g., AC signal lines), a dedicated bidirectional TVS such as the P4SMA11CAHE3/5AT must be selected instead.
What is the maximum steady-state power dissipation for the P4KA11AHE3/73?
The P4KA11AHE3/73 has a maximum steady-state power dissipation (PD) of 1.5 W when mounted on an infinite heatsink at lead temperature (TL) = 75 °C, per Figure 5 in the datasheet. Derating is required above 75 °C; at TL = 100 °C, usable PD drops to approximately 0.75 W. This rating governs continuous leakage-based heating in always-on automotive circuits.
P4KA11AHE3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AL, DO-41, Axial
- Series:
- PAR®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 9.4V
- Voltage - Breakdown (Min):
- 10.5V
- Voltage - Clamping (Max) @ Ipp:
- 15.6V
- Current - Peak Pulse (10/1000µs):
- 25.6A
- 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)
P4KA11AHE3/73 FAQ
1.How can I place an order for P4KA11AHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KA11AHE3/73 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 P4KA11AHE3/73 reliable?
The price and inventory of P4KA11AHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KA11AHE3/73 is usually 5 days.
3.What payment methods are accepted for P4KA11AHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KA11AHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KA11AHE3/73?
P4KA11AHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KA11AHE3/73 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 P4KA11AHE3/73?
For technical support, including P4KA11AHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KA11AHE3/73 requirements.
6.How does Aetrix verify that P4KA11AHE3/73 is sourced from the original manufacturer or authorized distributors?
All P4KA11AHE3/73 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 P4KA11AHE3/73 meets industry standards.
7.What is the process for return or replacement of P4KA11AHE3/73?
All P4KA11AHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with P4KA11AHE3/73, 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 P4KA11AHE3/73 part is unused and in its original packaging.
Return procedure for P4KA11AHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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