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Vishay General Semiconductor - Diodes Division P4KA6.8AHE3/73
- Part No.:
- P4KA6.8AHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KA6.8AHE3/73.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:7,900
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Product details
Overview
P4KA6.8AHE3/73 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), 6.45–7.14 V breakdown voltage at 10 mA, and 10.5 V clamping voltage at 38.1 A peak surge current. It operates from −65 °C to +185 °C and is AEC-Q101 qualified for engine control units and powertrain electronics.
For engineers reviewing the P4KA6.8AHE3/73 datasheet, P4KA6.8AHE3/73 pinout, P4KA6.8AHE3/73 application, or P4KA6.8AHE3/73 equivalent, this page delivers verified electrical specs, thermal derating behavior, clamping performance under automotive transients, and RoHS-compliant packaging details aligned with JESD201 Class 2 whisker resistance.
Technical Context
This TVS diode uses Vishay's patented PAR® construction to achieve low incremental surge resistance and fast response time (<1 ns), enabling effective suppression of ISO 7637-2 Load Dump and ISO 16750-2 jump-start transients. Its unidirectional polarity and 185 °C max junction temperature support under-hood deployment without thermal derating penalties up to 150 °C ambient.
The device complies with ANSI/IEEE C62.35 standards for surge protection and exhibits a +0.057 %/°C temperature coefficient of VBR, ensuring stable clamping across wide temperature excursions. Its 1.5 W steady-state power dissipation on infinite heatsink supports continuous biasing in always-on automotive sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 400 W - withstands automotive load dump surges per ISO 7637-2 without failure |
| Breakdown Voltage VBR | 6.45–7.14 V @ 10 mA - defines precise conduction onset for 5 V–12 V rail protection |
| Clamping Voltage VC | 10.5 V @ 38.1 A - limits downstream IC stress during 400 W transient events |
| Stand-off Voltage VWM | 5.80 V - ensures no leakage conduction during normal 5 V system operation |
| Max Junction Temperature | +185 °C - enables direct mounting near high-temperature ECUs without external heatsinking |
| Surge Current IFSM | 40 A (8.3 ms half-sine) - handles repetitive ignition coil switching transients |
| Temperature Coefficient | +0.057 %/°C - guarantees <±5 % VBR shift over −40 °C to +125 °C operating range |
Pinout & Package
Package: DO-204AL (DO-41), axial leaded, epoxy-molded case meeting UL 94 V-0 flammability rating. Matte tin-plated leads compliant with J-STD-002 and JESD22-B102 solderability; cathode denoted by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to ground or lower-potential node in unidirectional TVS configuration |
| Cathode | Current exit point during reverse-biased clamping | Connected to protected line (e.g., CAN_H, LIN, sensor supply); color band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Reduces incremental surge resistance to improve clamping consistency across repeated transients |
| AEC-Q101 qualification | Validated for automotive powertrain and chassis applications with zero defects in HTOL and TC testing |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth under thermal cycling, eliminating latent short-circuit risk in 15+ year deployments |
| 10/1000 µs waveform capability | Matches real-world automotive surge profiles including alternator load dump and inductive switch-off |
| RoHS-compliant & WEEE-aligned | Enables global vehicle program compliance without material declaration exceptions |
Applications
| Engine Control Unit (ECU) Power Input | CAN Bus Line Protection |
|---|---|
Use Scenario: Protects 12 V supply rail of gasoline/diesel engine control modules against ISO 7637-2 Pulse 5a (load dump) and Pulse 1 (inductive kick). IC Role / Device Role / Timing Role: Unidirectional TVS clamps transients before they reach MCU power pins and LDO regulators. Use Value: Prevents brownout resets and gate oxide damage in 32-bit automotive MCUs operating at 185 °C junction temperature. |
Use Scenario: Shields high-speed CAN_H/CAN_L differential pair from ESD and coupled transients in body control modules. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF) unidirectional clamp placed at connector interface. Use Value: Maintains signal integrity up to 1 Mbps while limiting bus voltage to ≤12 V during 400 W surges. |
| Automotive Sensor Signal Lines | LIN Bus Transceiver Interface |
Use Scenario: Guards analog outputs (e.g., oxygen sensor, throttle position) against battery reversal and jump-start spikes. IC Role / Device Role / Timing Role: Standoff voltage (5.80 V) blocks conduction during normal 5 V sensor operation; clamps only during fault. Use Value: Eliminates false readings and ADC saturation caused by sub-100 ns transients on millivolt-level signals. |
Use Scenario: Protects LIN transceiver I/O pins from battery feed coupling and electrostatic discharge in door modules. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to ground, placed within 2 cm of transceiver package. Use Value: Ensures LIN physical layer remains functional after 8 kV contact ESD per ISO 10605 without latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.8A-E3/5AT | Lower peak pulse power (400 W same), but higher clamping voltage (11.5 V @ 34.7 A); SMA package (surface-mount) | Not suitable for through-hole legacy automotive PCBs; requires reflow-compatible layout | Select when board space is constrained and automated assembly is required |
| 1.5KE6.8A | Same DO-41 package and VBR range, but lower temperature rating (175 °C max) and no AEC-Q101 qualification | Restricted to non-safety-critical consumer/industrial use; not approved for automotive production | Select only for cost-sensitive non-automotive designs where AEC-Q101 is not mandated |
Compared with SMAJ6.8A-E3/5AT and 1.5KE6.8A, P4KA6.8AHE3/73 uniquely combines AEC-Q101 qualification, 185 °C junction rating, and DO-41 through-hole compatibility-making it the only drop-in solution for legacy automotive ECU upgrades requiring zero PCB changes.
Availability
P4KA6.8AHE3/73 is available at Aetrix Electronics and suitable for engine control units, CAN/LIN bus interfaces, automotive sensor signal conditioning, and powertrain actuator drivers requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for P4KA6.8AHE3/73 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 optoelectronics for automotive, industrial, and computing markets.
The P4KA6.8AHE3/73 belongs to Vishay's automotive TVS diode family engineered specifically for AEC-Q101 compliance, under-hood thermal resilience, and immunity to ISO 7637-2 and ISO 16750-2 transients in powertrain and chassis systems.
FAQ
What is the maximum clamping voltage of the P4KA6.8AHE3/73 under full-rated surge conditions?
The P4KA6.8AHE3/73 clamps to a maximum of 10.5 V at its rated peak pulse current of 38.1 A (10/1000 µs waveform). This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's Document Number 88364, ensuring predictable overvoltage limiting for 5 V–12 V automotive circuits. The P4KA6.8AHE3/73 maintains this clamping performance across its full operating temperature range.
Is the P4KA6.8AHE3/73 qualified for automotive use per AEC-Q101?
Yes, the P4KA6.8AHE3/73 is explicitly AEC-Q101 qualified, as stated in the "Notes" section of Vishay's Document Number 88364 (Revision: 21-Oct-08). Its qualification covers high-temperature operating life (HTOL), temperature cycling, and unbiased highly accelerated stress testing-validating suitability for engine bay and transmission control module applications. The P4KA6.8AHE3/73 carries the HE3 suffix indicating high-reliability automotive grade.
What is the standoff voltage (VWM) of the P4KA6.8AHE3/73, and why does it matter?
The P4KA6.8AHE3/73 has a standoff voltage VWM of 5.80 V, meaning it remains non-conductive below this voltage during normal operation. This ensures no leakage current or power loss on 5 V sensor rails or LIN bus lines, preserving signal fidelity and minimizing standby current. The P4KA6.8AHE3/73's 5.80 V VWM provides 0.2 V margin above standard 5.5 V logic thresholds while enabling reliable clamping onset just above system nominal voltage.
Does the P4KA6.8AHE3/73 have RoHS and whisker resistance compliance?
Yes, the P4KA6.8AHE3/73 meets RoHS Directive 2002/95/EC and WEEE Directive 2002/96/EC. Its matte tin-plated leads pass JESD201 Class 2 whisker testing, preventing conductive filament growth under thermal cycling-a critical reliability requirement for automotive modules deployed over 15 years. The P4KA6.8AHE3/73 HE3 suffix explicitly denotes this qualification.
How does the temperature coefficient affect the P4KA6.8AHE3/73's breakdown voltage stability?
The P4KA6.8AHE3/73 has a VBR temperature coefficient of +0.057 %/°C, meaning its breakdown voltage increases linearly with junction temperature. Over a −40 °C to +125 °C range, this results in ≈9 % total shift-well within design margins for automotive 12 V systems. This predictable drift allows robust circuit margining without derating, and the P4KA6.8AHE3/73 maintains specified clamping performance up to its 185 °C maximum junction temperature.
P4KA6.8AHE3/73 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):
- 5.8V
- Voltage - Breakdown (Min):
- 6.45V
- Voltage - Clamping (Max) @ Ipp:
- 10.5V
- Current - Peak Pulse (10/1000µs):
- 38.1A
- 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)
P4KA6.8AHE3/73 FAQ
1.How can I place an order for P4KA6.8AHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KA6.8AHE3/73 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 P4KA6.8AHE3/73 reliable?
The price and inventory of P4KA6.8AHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KA6.8AHE3/73 is usually 5 days.
3.What payment methods are accepted for P4KA6.8AHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KA6.8AHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KA6.8AHE3/73?
P4KA6.8AHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KA6.8AHE3/73 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 P4KA6.8AHE3/73?
For technical support, including P4KA6.8AHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KA6.8AHE3/73 requirements.
6.How does Aetrix verify that P4KA6.8AHE3/73 is sourced from the original manufacturer or authorized distributors?
All P4KA6.8AHE3/73 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 P4KA6.8AHE3/73 meets industry standards.
7.What is the process for return or replacement of P4KA6.8AHE3/73?
All P4KA6.8AHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with P4KA6.8AHE3/73, 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 P4KA6.8AHE3/73 part is unused and in its original packaging.
Return procedure for P4KA6.8AHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KA6.8AHE3/73 Tags
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