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Vishay General Semiconductor - Diodes Division P4KA27AHE3/73
- Part No.:
- P4KA27AHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KA27AHE3/73.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:6,301
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Product details
Overview
P4KA27AHE3/73 from Vishay General Semiconductor is a unidirectional automotive-grade transient voltage suppressor (TVS) diode in DO-204AL (DO-41) package, featuring 25.7–28.4 V breakdown voltage (VBR), 37.5 V clamping voltage (VC) at 10.7 A peak pulse current, 400 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for under-hood electronics protection.
For engineers reviewing the P4KA27AHE3/73 datasheet, P4KA27AHE3/73 pinout, P4KA27AHE3/73 application, or P4KA27AHE3/73 equivalent, this part is selected for robust overvoltage protection in automotive sensor signal lines, MOSFET gate drivers, and industrial control I/O where high-temperature stability (TJ up to +185 °C), low clamping ratio, and RoHS-compliant high-reliability construction are required.
Technical Context
This TVS diode uses Vishay's patented PAR® construction for stable surge performance and low incremental surge resistance. It operates exclusively in unidirectional polarity with a color-band cathode marking and is rated for repetitive 10/1000 µs transients at 0.01% duty cycle.
Designed for automotive environments, P4KA27AHE3/73 meets AEC-Q101 stress test requirements and supports operation from –65 °C to +185 °C junction temperature. Its 1.5 W steady-state power dissipation (at TL = 75 °C) and 40 A non-repetitive forward surge rating (8.3 ms half-sine) enable use in high-energy inductive load switching scenarios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V at 1 mA - defines precise voltage threshold for avalanche conduction onset |
| VC @ IPPM | 37.5 V at 10.7 A - maximum clamped voltage during 400 W transient, limiting downstream stress |
| PPPM | 400 W (10/1000 µs waveform) - peak surge energy handling capacity per transient event |
| VWM | 23.1 V - maximum continuous reverse working voltage before leakage exceeds 1 µA |
| TJ max. | +185 °C - enables reliable operation in engine compartment and powertrain control units |
| Package | DO-204AL (DO-41) - axial-leaded, UL 94 V-0 molded epoxy case with matte tin-plated leads |
| AEC-Q101 | Qualified - validated for automotive reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
DO-204AL (DO-41) axial package with cathode indicated by color band. Leads are matte tin-plated, solderable per J-STD-002 and JESD22-B102, and whisker-resistant per JESD201 Class 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance reference in unidirectional clamp configuration |
| Cathode | Avalanche conduction terminal | Connected to protected line; conducts when reverse voltage exceeds VBR, shunting surge to ground |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables consistent clamping performance across temperature and lifetime, reducing parameter drift vs. standard PN-junction TVS |
| 400 W peak pulse power (10/1000 µs) | Handles high-energy transients from automotive load dump or inductive kick without degradation |
| Low clamping ratio (VC/VBR ≈ 1.34) | Minimizes overvoltage exposure to downstream ICs while maintaining margin above VWM |
| AEC-Q101 qualified & RoHS compliant | Meets automotive supply chain requirements for traceability, reliability, and environmental compliance |
| 185 °C max junction temperature | Supports placement near heat sources (e.g., power modules, engine ECUs) without derating penalties |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control modules exposed to load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between sensor output and microcontroller ADC input. Use Value: Limits transient voltage to ≤37.5 V, preserving ADC integrity and preventing latch-up in 3.3 V or 5 V signal chains. |
Use Scenario: Safeguarding digital input channels on programmable logic controllers interfacing with 24 V DC field devices subject to inductive switching noise. IC Role / Device Role / Timing Role: Standoff protection device mounted at connector interface to absorb fast-rising surges before reaching optocoupler or Schmitt trigger inputs. Use Value: Withstands 10.7 A peak surge at 37.5 V clamping, enabling reliable operation in factory automation with minimal false triggering. |
| Automotive Power MOSFET Gate Protection | Telecom Line Interface Protection |
Use Scenario: Shielding high-side N-channel MOSFET gates in body control modules from voltage spikes induced by relay coil de-energization. IC Role / Device Role / Timing Role: Low-capacitance TVS connected between gate and source to clamp gate-source overvoltage without affecting PWM switching speed. Use Value: Fast response time and 37.5 V clamping prevent gate oxide rupture while maintaining <1 ns reaction latency. |
Use Scenario: Protecting RS-485 transceiver inputs in outdoor telecom cabinets subjected to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary-level unidirectional suppressor on differential bus lines, upstream of secondary protection (e.g., GDT + MOV). Use Value: 400 W pulse rating and 23.1 V standoff allow compatibility with 24 V nominal telecom power rails while meeting ITU-T K.20 immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ28A | 28 V VBR min/max (25.2–30.8 V), same DO-214AC package, 400 W rating, but not AEC-Q101 qualified | Rated for commercial/industrial use only; lacks automotive qualification and high-temp derating validation | Select SMAJ28A only for non-automotive designs where cost or footprint drives preference over qualification requirements |
| 1.5KE27A | 27 V VBR (24.3–29.7 V), DO-201AD package, 1500 W rating, higher capacitance, no AEC-Q101 or HE3 suffix reliability enhancements | Higher power handling but larger footprint and lower temperature capability (TJ max = +175 °C) | Choose 1.5KE27A only when surge energy exceeds 400 W and board space permits larger package |
Compared with SMAJ28A and 1.5KE27A, P4KA27AHE3/73 delivers automotive-grade reliability, tighter VBR tolerance, superior high-temperature stability (+185 °C), and whisker-resistant plating-making it the sole choice for AEC-Q101–mandated under-hood deployments.
Availability
P4KA27AHE3/73 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, and power MOSFET gate safeguarding requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for P4KA27AHE3/73 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, rectifiers, and protection devices for demanding industrial and automotive applications.
The P4KA series was developed specifically for AEC-Q101–compliant transient suppression in harsh automotive environments, emphasizing thermal robustness, low clamping variance, and long-term parametric stability under temperature cycling.
FAQ
What is the breakdown voltage range of the P4KA27AHE3/73?
The P4KA27AHE3/73 has a guaranteed breakdown voltage (VBR) range of 25.7 V to 28.4 V at 1 mA test current, measured per ANSI/IEEE C62.35 standards. This tight tolerance ensures predictable turn-on behavior in automotive circuits where precise overvoltage thresholds are critical for protecting 24 V system components.
Is the P4KA27AHE3/73 suitable for bidirectional transient protection?
No, the P4KA27AHE3/73 is unidirectional only, as confirmed in the Vishay datasheet Document Number 88364. It features a cathode band marking and is designed to clamp reverse-polarity transients only. For bidirectional protection, a separate pair or a dedicated bidirectional TVS such as SMBJ26CA must be used.
Does the P4KA27AHE3/73 meet automotive qualification standards?
Yes, the P4KA27AHE3/73 carries the HE3 suffix indicating AEC-Q101 qualification and high-reliability automotive grade status. It undergoes rigorous testing for temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge per AEC-Q101 Rev D, making it approved for under-hood and powertrain applications.
What is the clamping voltage of the P4KA27AHE3/73 at its rated peak pulse current?
The P4KA27AHE3/73 clamps to a maximum of 37.5 V at its rated peak pulse current of 10.7 A (10/1000 µs waveform). This value is measured under standardized conditions and reflects the actual voltage seen by protected circuitry during worst-case surge events.
How does the HE3 suffix affect the P4KA27AHE3/73's reliability?
The HE3 suffix on P4KA27AHE3/73 denotes RoHS-compliant, high-reliability construction with matte tin-plated leads qualified to JESD201 Class 2 for whisker resistance and J-STD-002/JESD22-B102 for solderability-critical for automotive assembly processes and long-term field reliability in vibration-prone environments.
P4KA27AHE3/73 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):
- 23.1V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- Current - Peak Pulse (10/1000µs):
- 10.7A
- 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)
P4KA27AHE3/73 FAQ
1.How can I place an order for P4KA27AHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KA27AHE3/73 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 P4KA27AHE3/73 reliable?
The price and inventory of P4KA27AHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KA27AHE3/73 is usually 5 days.
3.What payment methods are accepted for P4KA27AHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KA27AHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KA27AHE3/73?
P4KA27AHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KA27AHE3/73 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 P4KA27AHE3/73?
For technical support, including P4KA27AHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KA27AHE3/73 requirements.
6.How does Aetrix verify that P4KA27AHE3/73 is sourced from the original manufacturer or authorized distributors?
All P4KA27AHE3/73 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 P4KA27AHE3/73 meets industry standards.
7.What is the process for return or replacement of P4KA27AHE3/73?
All P4KA27AHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with P4KA27AHE3/73, 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 P4KA27AHE3/73 part is unused and in its original packaging.
Return procedure for P4KA27AHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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