My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P4KA39AHE3/73
- Part No.:
- P4KA39AHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KA39AHE3/73.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:5,019
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4KA39AHE3/73 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), 37.1–41.0 V breakdown voltage, and 53.9 V clamping voltage at 7.4 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 P4KA39AHE3/73 datasheet, P4KA39AHE3/73 pinout, P4KA39AHE3/73 application, or P4KA39AHE3/73 equivalent, this page delivers verified electrical parameters, automotive reliability validation, thermal derating curves, JEDEC-compliant solderability data, and direct alternative part comparisons for ESD and load-dump protection design.
Technical Context
This TVS diode uses Vishay's patented PAR® construction for low incremental surge resistance and stable clamping under repetitive transients. Its unidirectional polarity enables precise reverse-biased overvoltage clamping on DC power rails and signal lines with fast response time (<1 ns) and minimal capacitance (typically <100 pF at VWM).
The device meets ANSI/IEEE C62.35 standards for surge suppression and is characterized with 10/1000 µs waveform testing. Thermal performance is validated up to TJ = 185 °C, with power derating defined from TL = 75 °C and full compliance to JESD201 Class 2 whisker resistance and RoHS 2002/95/EC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 400 W - sustains automotive load-dump surges without degradation |
| Breakdown Voltage VBR | 37.1–41.0 V at 1 mA - ensures reliable triggering above nominal 36 V system voltage |
| Clamping Voltage VC | 53.9 V at 7.4 A - limits downstream IC stress during ISO 7637-2 Pulse 5a events |
| Standoff Voltage VWM | 33.3 V - provides margin against normal operating voltage drift in 24 V systems |
| Operating Temperature Range | −65 °C to +185 °C - supports under-hood placement in AEC-Q101-qualified applications |
| Surge Current IPPM | 7.4 A (10/1000 µs) - withstands repeated transients per SAE J1113-11 test conditions |
| Leakage Current ID | ≤1.0 µA at 33.3 V - minimizes standby power loss in always-on vehicle modules |
Pinout & Package
Package: DO-204AL (DO-41), molded epoxy case with matte tin-plated leads; cathode denoted by color band; UL 94 V-0 rated compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Connected to ground or low-side return path in unidirectional clamp configuration |
| Cathode | Current exit terminal in forward bias; high-impedance node in reverse bias until VBR | Connected to protected line (e.g., battery rail or sensor supply); color band identifies this end |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Reduces incremental surge resistance for tighter clamping and lower let-through energy |
| AEC-Q101 qualification | Validated for automotive powertrain and chassis applications with zero defects in accelerated life testing |
| 185 °C max junction temperature | Enables placement near high-temperature components (e.g., ignition coils, DC-DC converters) without thermal derating penalties |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth under thermal cycling, ensuring long-term solder joint integrity in automotive ECUs |
| 400 W 10/1000 µs rating | Meets ISO 7637-2 Pulse 5a requirements for 24 V commercial vehicle systems |
Applications
| Engine Control Unit (ECU) Power Rail Protection | Automotive Sensor Signal Line Clamping |
|---|---|
Use Scenario: Protects microcontroller power inputs from load-dump transients during alternator regulation failure in diesel engines. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery rail and LDO input to clamp surges before regulation stage. Use Value: Limits voltage to ≤53.9 V during 400 W pulses, preventing brownout or latch-up of 3.3 V/5 V logic supplies. |
Use Scenario: Shields analog outputs of pressure and temperature sensors from ESD and switching noise in HVAC modules. IC Role / Device Role / Timing Role: Low-capacitance TVS connected between sensor output and ground to suppress fast transients without distorting 0–5 V signals. Use Value: Maintains signal fidelity with <100 pF junction capacitance while clamping ±8 kV contact ESD per IEC 61000-4-2. |
| Body Control Module (BCM) LIN Bus Protection | Start-Stop System Battery Monitoring Circuit |
Use Scenario: Guards LIN transceiver pins against induced transients from nearby relay actuation in door module assemblies. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to ground on LIN data line, leveraging fast response (<1 ns) to preserve 19.2 kbps timing margins. Use Value: Prevents communication errors by limiting voltage excursions to <53.9 V during 100 ns rise-time spikes. |
Use Scenario: Safeguards voltage divider and ADC input in battery monitoring ICs during cranking-induced dips and recovery surges. IC Role / Device Role / Timing Role: Standoff-rated TVS (33.3 V) placed across sensing resistor network to avoid false low-voltage alarms during 200 ms 30 V transients. Use Value: Enables accurate SoH estimation by maintaining measurement accuracy despite ±40 V transients on 12 V/24 V battery rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36AHE3/52 | DO-214AA package; 36 V VWM, 58.1 V VC at 6.9 A; 600 W rating | Higher power handling but larger footprint; less suitable for space-constrained PCBs | Select when higher surge margin is required and board area allows SMB package |
| 1.5KE39A | DO-201AD package; 39 V VWM, 60.2 V VC at 6.7 A; 1500 W rating; non-automotive grade | Lacks AEC-Q101 qualification and high-temperature capability (TJ max = 175 °C) | Acceptable for industrial prototypes but not for production automotive designs requiring qualification traceability |
Compared with P4KA39AHE3/73, SMBJ36AHE3/52 offers greater surge capacity in a surface-mount format but requires layout revision, while 1.5KE39A delivers higher peak power in through-hole form but omits automotive reliability validation and thermal robustness-making P4KA39AHE3/73 the only AEC-Q101-qualified DO-41 option in its voltage class.
Availability
P4KA39AHE3/73 is available at Aetrix Electronics and suitable for engine control units, body control modules, and battery management systems requiring stable component supply, automotive qualification traceability, and high-temperature operational continuity.
Supply support for P4KA39AHE3/73 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 P4KA39AHE3/73 belongs to Vishay's automotive TVS diode family engineered specifically for AEC-Q101 compliance, under-hood thermal resilience, and ISO 7637-2 transient immunity in 12 V and 24 V vehicle architectures.
FAQ
What is the clamping voltage of the P4KA39AHE3/73 at its rated peak pulse current?
The P4KA39AHE3/73 has a maximum clamping voltage (VC) of 53.9 V at 7.4 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per ANSI/IEEE C62.35 and ensures protected circuits remain within safe operating limits during standardized automotive surge events. The P4KA39AHE3/73 maintains this clamping performance across its full operating temperature range.
Is the P4KA39AHE3/73 qualified for automotive use?
Yes, the P4KA39AHE3/73 is AEC-Q101 qualified and designated as high-reliability/automotive grade (HE3 suffix). It undergoes rigorous stress testing including high-temperature operating life, temperature cycling, and mechanical shock per AEC standards. The P4KA39AHE3/73 is approved for use in powertrain, chassis, and body electronics where qualification traceability is mandatory.
What package type does the P4KA39AHE3/73 use, and what are its key mechanical features?
The P4KA39AHE3/73 uses the DO-204AL (DO-41) axial-leaded package with molded epoxy housing rated UL 94 V-0. Its leads are matte tin-plated and compliant with J-STD-002 and JESD22-B102 solderability standards. The P4KA39AHE3/73 also passes JESD201 Class 2 whisker testing, ensuring long-term reliability in thermally cycled automotive environments.
How does the P4KA39AHE3/73 differ from the standard P4KA39 variant?
The P4KA39AHE3/73 features tighter breakdown voltage tolerance (37.1–41.0 V vs. 35.1–42.9 V for P4KA39) and is manufactured with HE3 process enhancements for automotive reliability. It carries the AEC-Q101 qualification and JESD201 Class 2 whisker resistance, whereas P4KA39 is a commercial-grade variant without those validations. The P4KA39AHE3/73 is the recommended choice for production automotive designs.
What is the maximum junction temperature rating for the P4KA39AHE3/73?
The P4KA39AHE3/73 has a maximum junction temperature (TJ) rating of +185 °C, enabling operation in high-heat zones such as near engine compartments or power converters. This rating is validated per the manufacturer's thermal derating curves and supports continuous operation at elevated ambient temperatures when mounted with appropriate lead length and PCB copper area. The P4KA39AHE3/73 maintains full electrical specifications up to this limit.
P4KA39AHE3/73 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):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 7.4A
- 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)
P4KA39AHE3/73 FAQ
1.How can I place an order for P4KA39AHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KA39AHE3/73 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 P4KA39AHE3/73 reliable?
The price and inventory of P4KA39AHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KA39AHE3/73 is usually 5 days.
3.What payment methods are accepted for P4KA39AHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KA39AHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KA39AHE3/73?
P4KA39AHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KA39AHE3/73 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 P4KA39AHE3/73?
For technical support, including P4KA39AHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KA39AHE3/73 requirements.
6.How does Aetrix verify that P4KA39AHE3/73 is sourced from the original manufacturer or authorized distributors?
All P4KA39AHE3/73 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 P4KA39AHE3/73 meets industry standards.
7.What is the process for return or replacement of P4KA39AHE3/73?
All P4KA39AHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with P4KA39AHE3/73, 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 P4KA39AHE3/73 part is unused and in its original packaging.
Return procedure for P4KA39AHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KA39AHE3/73 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
