My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P4KA27HE3/73
- Part No.:
- P4KA27HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KA27HE3/73.pdf
- Description:
- TVS DIODE 21.8VWM 39.1VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:2,622
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4KA27HE3/73 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), 24.3–29.7 V breakdown voltage (VBR), and 39.1 V clamping voltage (VC) at 10.2 A peak surge current. It operates from −65 °C to +185 °C and is AEC-Q101 qualified for engine control units and sensor protection in 12 V automotive systems.
For engineers reviewing the P4KA27HE3/73 datasheet, P4KA27HE3/73 pinout, P4KA27HE3/73 application, or P4KA27HE3/73 equivalent, this page delivers verified electrical specs, automotive reliability validation, thermal derating curves, clamping performance under ISO 7637-2 pulses, and direct-fit alternatives for ECU power rail and signal line surge protection.
Technical Context
The P4KA27HE3/73 employs Vishay's patented PAR® construction for low incremental surge resistance and stable high-temperature clamping. Its unidirectional configuration provides reverse-biased transient suppression with 1.0 µA max reverse leakage at 21.8 V stand-off voltage (VWM) and 0.096 %/°C VBR temperature coefficient.
Designed for repetitive 10/1000 µs transients at 0.01 % duty cycle, it sustains 40 A non-repetitive forward surge (8.3 ms half-sine) and maintains clamping integrity up to 185 °C junction temperature-enabling placement near hot engine compartments without derating loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 400 W - withstands ISO 7637-2 Pulse 1 & 2a load dump surges on 12 V vehicle networks |
| Breakdown Voltage VBR | 24.3–29.7 V at 1 mA - ensures reliable triggering above nominal 12 V system voltage with margin |
| Clamping Voltage VC | 39.1 V at 10.2 A IPPM - limits downstream IC voltage to safe level during 100 V/100 ms transients |
| Stand-off Voltage VWM | 21.8 V - blocks normal operating voltage while allowing fast response to overvoltage events |
| Junction Temperature Range | −65 °C to +185 °C - supports under-hood deployment in AEC-Q101-compliant automotive modules |
| Surge Current IPPM | 10.2 A (10/1000 µs) - matches typical alternator-induced transient energy in passenger vehicles |
| Reverse Leakage ID | 1.0 µA at VWM - minimizes standby power loss in always-on vehicle subsystems |
Pinout & Package
DO-204AL (DO-41) molded epoxy package with matte tin-plated leads; cathode indicated by color band; RoHS-compliant HE3 suffix meets JESD201 Class 2 whisker test and AEC-Q101 qualification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to ground or low-side return in unidirectional TVS configuration |
| Cathode | Transient clamping node | Connected to protected line (e.g., battery rail or sensor output); color band identifies this terminal |
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 under-hood use including temperature cycling, humidity, and mechanical shock |
| 185 °C max junction temperature | Enables direct mounting on PCBs adjacent to power MOSFETs or DC/DC converters without thermal derating |
| Low 0.096 %/°C VBR drift | Maintains consistent trigger threshold across full automotive ambient range (−40 °C to +125 °C) |
| UL 94 V-0 molding compound | Meets flammability requirements for engine control module enclosures and wiring harnesses |
Applications
| Engine Control Unit (ECU) Power Input | Automotive Sensor Signal Lines |
|---|---|
Use Scenario: Protects microcontroller power rails from load dump transients during alternator regulation failure in 12 V systems. IC Role / Device Role / Timing Role: Unidirectional TVS clamps voltage spikes to ≤39.1 V before they reach LDO regulators or MCU VDD pins. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic during 100 V/400 ms ISO 7637-2 Pulse 5a events. |
Use Scenario: Shields analog outputs of pressure, temperature, and position sensors from inductive switching noise in solenoid drivers. IC Role / Device Role / Timing Role: Fast-response TVS absorbs sub-100 ns ESD and relay coil flyback energy on 0–5 V signal paths. Use Value: Maintains signal integrity below 1 LSB error in 12-bit ADC inputs under 30 kV HBM ESD stress. |
| Body Control Module (BCM) LIN Bus | Infotainment System USB Port |
Use Scenario: Guards LIN transceiver I/O against battery reversal and jump-start surges in door module applications. IC Role / Device Role / Timing Role: Stand-off voltage (21.8 V) exceeds LIN bus operating range (8–18 V), enabling silent blocking during normal operation. Use Value: Eliminates need for series resistors or additional filtering while meeting ISO 11898-3 EMC immunity targets. |
Use Scenario: Suppresses conducted transients coupled into USB VBUS from vehicle accessory power supplies. IC Role / Device Role / Timing Role: Clamps 10/1000 µs surges to 39.1 V before reaching USB controller's 5.5 V absolute maximum rating. Use Value: Enables compliance with CISPR 25 Class 5 radiated emissions without ferrite beads or common-mode chokes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ28A-E3/5A (Vishay) | 28 V VBR min/max (25.2–30.8 V), same DO-214AC package, 400 W rating, but not AEC-Q101 qualified | Limited to industrial/commercial environments; lacks automotive temperature cycling and humidity validation | Select when cost sensitivity outweighs AEC-Q101 requirement and board space allows SMA footprint |
| 1.5KE27CA (ON Semiconductor) | Bidirectional configuration, 27 V VBR, DO-201AD package, 1500 W rating, AEC-Q101 qualified | Protects AC-coupled lines (e.g., CAN H/L) but introduces higher capacitance (150 pF vs. ~50 pF for P4KA27HE3/73) | Choose only for bidirectional signal protection where symmetric clamping is mandatory |
Compared with SMAJ28A-E3/5A and 1.5KE27CA, the P4KA27HE3/73 uniquely combines AEC-Q101 qualification, unidirectional low-capacitance design, and DO-41 through-hole compatibility-making it optimal for legacy automotive PCBs requiring drop-in replacement of older TVS diodes without layout change.
Availability
P4KA27HE3/73 is available at Aetrix Electronics and suitable for engine control units, body control modules, sensor interface circuits, and infotainment power supplies requiring stable component supply across automotive production lifecycles.
Supply support for P4KA27HE3/73 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on high-reliability, high-temperature, and automotive-qualified components.
The P4KA27HE3/73 belongs to Vishay's automotive TVS diode family engineered specifically for robust transient suppression in 12 V and 24 V vehicle electrical systems under AEC-Q101 stress conditions.
FAQ
What is the clamping voltage of the P4KA27HE3/73 at its rated peak pulse current?
The P4KA27HE3/73 has a maximum clamping voltage (VC) of 39.1 V at 10.2 A peak pulse current (IPPM) under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards and ensures protected circuitry remains below critical voltage thresholds during ISO 7637-2 transients. The P4KA27HE3/73 achieves this with low incremental surge resistance enabled by its PAR® construction.
Is the P4KA27HE3/73 suitable for use in automotive under-hood applications?
Yes, the P4KA27HE3/73 is AEC-Q101 qualified and rated for junction temperatures up to +185 °C, making it suitable for under-hood deployment in engine control units and transmission control modules. Its DO-204AL package passes solder dip testing at 260 °C for 40 s, and its UL 94 V-0 molding compound meets flammability requirements for enclosed automotive environments. The P4KA27HE3/73 is explicitly validated for high-temperature stability per Vishay Document 88364.
What does the "HE3" suffix indicate in P4KA27HE3/73?
"HE3" denotes a RoHS-compliant, high-reliability, automotive-grade variant per Vishay's internal coding: "H" = high reliability, "E3" = matte tin-plated leads compliant with J-STD-002 and JESD22-B102, and passing JESD201 Class 2 whisker testing. The P4KA27HE3/73 also carries AEC-Q101 qualification, distinguishing it from commercial-grade equivalents like P4KA27A. This suffix confirms suitability for automotive production programs.
How does the P4KA27HE3/73 differ from the P4KA27A variant?
The P4KA27HE3/73 is the automotive-grade, AEC-Q101-qualified version with HE3 suffix (matte tin plating, whisker-tested, RoHS-compliant), whereas P4KA27A is a commercial-grade variant without automotive qualification. Both share identical electrical specs (VBR: 24.3–29.7 V, VC: 39.1 V), but only the P4KA27HE3/73 undergoes temperature cycling, humidity resistance, and mechanical shock testing required for automotive use. The P4KA27HE3/73 is intended for safety-critical vehicle systems.
Can the P4KA27HE3/73 be used in bidirectional signal protection applications?
No-the P4KA27HE3/73 is unidirectional only, as confirmed in Vishay Document 88364 ("Available in uni-directional polarity only"). It protects against reverse-polarity transients on positive rails but cannot clamp negative excursions. For bidirectional protection (e.g., CAN bus or differential signaling), a device such as 1.5KE27CA must be selected instead. Using the P4KA27HE3/73 in bidirectional roles risks failure during negative-voltage transients.
P4KA27HE3/73 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):
- 21.8V
- Voltage - Breakdown (Min):
- 24.3V
- Voltage - Clamping (Max) @ Ipp:
- 39.1V
- Current - Peak Pulse (10/1000µs):
- 10.2A
- 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)
P4KA27HE3/73 FAQ
1.How can I place an order for P4KA27HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KA27HE3/73 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 P4KA27HE3/73 reliable?
The price and inventory of P4KA27HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KA27HE3/73 is usually 5 days.
3.What payment methods are accepted for P4KA27HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KA27HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KA27HE3/73?
P4KA27HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KA27HE3/73 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 P4KA27HE3/73?
For technical support, including P4KA27HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KA27HE3/73 requirements.
6.How does Aetrix verify that P4KA27HE3/73 is sourced from the original manufacturer or authorized distributors?
All P4KA27HE3/73 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 P4KA27HE3/73 meets industry standards.
7.What is the process for return or replacement of P4KA27HE3/73?
All P4KA27HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with P4KA27HE3/73, 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 P4KA27HE3/73 part is unused and in its original packaging.
Return procedure for P4KA27HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KA27HE3/73 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 …
