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Vishay General Semiconductor - Diodes Division P4KA36AHE3/73
- Part No.:
- P4KA36AHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KA36AHE3/73.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:6,715
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Product details
Overview
P4KA36AHE3/73 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), 34.2 V to 37.8 V breakdown voltage (VBR), and 49.9 V clamping voltage (VC) at 8.0 A peak pulse current. It operates from −65 °C to +185 °C and is AEC-Q101 qualified for engine control units and sensor protection in 12 V/24 V automotive systems.
For engineers reviewing the P4KA36AHE3/73 datasheet, P4KA36AHE3/73 pinout, P4KA36AHE3/73 application, or P4KA36AHE3/73 equivalent, this part delivers verified high-temperature stability, low incremental surge resistance, and RoHS-compliant matte tin-plated leads solderable per J-STD-002 - critical for under-hood ECU transient suppression and ISO 7637-2 compliance.
Technical Context
The P4KA36AHE3/73 employs Vishay's patented PAR® construction for stable clamping under repetitive surge stress and maintains <0.1 %/°C temperature coefficient of VBR. Its unidirectional configuration provides forward conduction path during negative transients while clamping positive surges above VWM = 30.8 V.
Designed for automotive environments, it sustains 185 °C maximum junction temperature and meets AEC-Q101 stress test requirements including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - enabling reliable operation in alternator load-dump and inductive switching scenarios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 400 W - withstands ISO 7637-2 Pulse 5a (load dump) without failure |
| Breakdown Voltage VBR | 34.2 V to 37.8 V at 1 mA - ensures precise overvoltage triggering above nominal 24 V rail |
| Clamping Voltage VC | 49.9 V at 8.0 A IPPM - limits downstream IC voltage stress during 100 V/10 ms transients |
| Stand-off Voltage VWM | 30.8 V - blocks normal 24 V system operation while allowing margin for ripple and tolerance |
| Operating Temperature Range | −65 °C to +185 °C - supports placement near engines, transmissions, and power electronics |
| AEC-Q101 Qualified | Yes - validated for automotive grade reliability per stress test conditions in Rev. 21-Oct-08 spec |
| RoHS & Whisker Tested | HE3 suffix: compliant with RoHS 2002/95/EC and JESD201 Class 2 whisker resistance |
Pinout & Package
Package: DO-204AL (DO-41), axial-leaded, molded epoxy case meeting UL 94 V-0. Cathode indicated by color band on body. Matte tin-plated leads, 0.034" (0.86 mm) diameter, 1.0" (25.4 mm) minimum lead length.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connects to ground or lower-potential node; conducts during negative transients |
| Cathode | Clamping terminal | Connects to protected line (e.g., battery rail); clamps positive surges above VWM |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables consistent clamping performance across 1000+ surge cycles without parameter drift |
| 400 W peak pulse rating (10/1000 µs) | Meets ISO 7637-2 Pulse 5a energy requirement for 24 V commercial vehicle systems |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., relay coil de-energization) |
| 185 °C max junction temperature | Supports direct mounting on high-heat PCB areas near power MOSFETs or DC/DC converters |
| Solder dip 260 °C, 40 s | Compatible with standard lead-free reflow and wave soldering processes without degradation |
Applications
| Engine Control Unit Protection | Automotive Sensor Interface Protection |
|---|---|
|
Use Scenario: Suppresses load-dump transients (up to 60 V, 400 ms) induced by alternator disconnection in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and microcontroller power input. Use Value: Clamps transient to ≤49.9 V within nanoseconds, preventing latch-up or gate oxide damage to 5 V/3.3 V logic rails. |
Use Scenario: Protects LIN/CAN transceiver I/O pins and analog sensor signal lines (e.g., MAP, TPS) from ESD and inductive kickback. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between signal line and chassis ground. Use Value: Limits voltage excursion to <30.8 V during normal operation and clamps to 49.9 V during 1 kV/500 Ω EFT bursts. |
| Body Control Module Power Rail | Start-Stop System Battery Monitoring |
|
Use Scenario: Guards 12 V supply inputs in BCMs exposed to cranking dips and relay-switching spikes during door/window actuation. IC Role / Device Role / Timing Role: Primary overvoltage clamp on fused battery feed before LDO regulators. Use Value: Withstands 40 A IFSM surge without fuse blow, maintaining system uptime during repeated 8.3 ms half-sine events. |
Use Scenario: Shields battery voltage monitoring ICs in 12 V start-stop systems from regenerative braking surges and alternator ripple. IC Role / Device Role / Timing Role: Precision-clamp TVS on ADC input divider network. Use Value: Tight VBR tolerance (±5 %) ensures accurate trip point alignment with 30.8 V VWM, avoiding false undervoltage alarms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A-E3/5AT | Same VBR range (34.2–37.8 V), but 400 W rating uses 8.3 ms waveform; lower IPPM (7.5 A vs. 8.0 A) | Not AEC-Q101 qualified; intended for industrial/commercial use only | Select when automotive qualification is not required and cost sensitivity outweighs extended temperature margin |
| 1.5KE36A | Higher VC (58.1 V), larger DO-201AD package, no HE3 whisker rating | Lacks AEC-Q101 and RoHS-compliant plating; unsuitable for modern automotive production | Consider only for legacy repair or non-automotive prototyping where footprint flexibility exists |
Compared with SMAJ36A-E3/5AT and 1.5KE36A, the P4KA36AHE3/73 uniquely combines AEC-Q101 qualification, 185 °C TJ max, and JESD201 Class 2 whisker resistance in a DO-41 footprint - making it the only drop-in option for new automotive designs requiring full PPAP compliance.
Availability
P4KA36AHE3/73 is available at Aetrix Electronics and suitable for engine control units, body control modules, start-stop battery monitors, and automotive sensor interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for P4KA36AHE3/73 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 P4KA36AHE3/73 belongs to Vishay's automotive TVS diode family engineered specifically for AEC-Q101 compliance and under-hood transient suppression - targeting robustness against load dump, EFT, and ISO 16750-2 electrical stress.
FAQ
What is the clamping voltage of the P4KA36AHE3/73 at its rated peak pulse current?
The P4KA36AHE3/73 has a maximum clamping voltage (VC) of 49.9 V at 8.0 A peak pulse current (IPPM) using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards and guarantees predictable overvoltage limiting during ISO 7637-2 Pulse 5a events. The P4KA36AHE3/73 maintains this clamping performance across its full operating temperature range up to +185 °C.
Is the P4KA36AHE3/73 qualified for automotive applications?
Yes, the P4KA36AHE3/73 is AEC-Q101 qualified and designated as an automotive-grade part (HE3 suffix). It passes all stress tests including high-temperature operating life, temperature cycling, and unbiased HAST, and is rated for operation from −65 °C to +185 °C. The P4KA36AHE3/73 is explicitly listed in Vishay Document Number 88364 as meeting AEC-Q101 requirements for transient voltage suppressors.
What does the "HE3" suffix mean in P4KA36AHE3/73?
The "HE3" suffix indicates RoHS-compliant construction with matte tin-plated leads that meet J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements. It also denotes high-reliability automotive qualification per AEC-Q101. The P4KA36AHE3/73 is not a generic variant - the HE3 designation is tied directly to its qualified manufacturing process and material stack, as documented in Vishay's 88364 specification.
Can the P4KA36AHE3/73 replace the P4KA36A in existing designs?
Yes, the P4KA36AHE3/73 is a direct replacement for P4KA36A with identical electrical specifications and DO-204AL packaging. The HE3 suffix adds RoHS compliance, JESD201 Class 2 whisker resistance, and AEC-Q101 qualification - all backward-compatible enhancements. No layout or schematic changes are needed when upgrading from P4KA36A to P4KA36AHE3/73.
What is the standoff voltage (VWM) of the P4KA36AHE3/73?
The standoff voltage (VWM) of the P4KA36AHE3/73 is 30.8 V, meaning it remains non-conductive below this voltage during normal 24 V system operation. This provides sufficient margin above nominal rail voltage while ensuring reliable clamping onset during transients exceeding VBR (34.2–37.8 V). The P4KA36AHE3/73 maintains this VWM across its full temperature range with minimal drift.
P4KA36AHE3/73 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):
- 30.8V
- Voltage - Breakdown (Min):
- 34.2V
- Voltage - Clamping (Max) @ Ipp:
- 49.9V
- Current - Peak Pulse (10/1000µs):
- 8A
- 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)
P4KA36AHE3/73 FAQ
1.How can I place an order for P4KA36AHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KA36AHE3/73 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 P4KA36AHE3/73 reliable?
The price and inventory of P4KA36AHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KA36AHE3/73 is usually 5 days.
3.What payment methods are accepted for P4KA36AHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KA36AHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KA36AHE3/73?
P4KA36AHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KA36AHE3/73 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 P4KA36AHE3/73?
For technical support, including P4KA36AHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KA36AHE3/73 requirements.
6.How does Aetrix verify that P4KA36AHE3/73 is sourced from the original manufacturer or authorized distributors?
All P4KA36AHE3/73 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 P4KA36AHE3/73 meets industry standards.
7.What is the process for return or replacement of P4KA36AHE3/73?
All P4KA36AHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with P4KA36AHE3/73, 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 P4KA36AHE3/73 part is unused and in its original packaging.
Return procedure for P4KA36AHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KA36AHE3/73 Tags
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