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Vishay General Semiconductor - Diodes Division P4KE18CHE3/73
- Part No.:
- P4KE18CHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE18CHE3/73.pdf
- Description:
- TVS DIODE 14.5VWM 26.5VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:8,482
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Product details
Overview
P4KE18CHE3/73 from Vishay General Semiconductor is a unidirectional TransZORB® transient voltage suppressor (TVS) diode in DO-41 package, designed for clamping inductive switching surges and ESD events on power rails and signal lines. It features 17.1 V to 18.9 V breakdown voltage (VBR), 15.3 V standoff voltage (VWM), 400 W peak pulse power (10/1000 μs), 15.9 A peak pulse current (IPPM), and 25.2 V maximum clamping voltage (VC) at rated surge.
For engineers reviewing the P4KE18CHE3/73 datasheet, P4KE18CHE3/73 pinout, P4KE18CHE3/73 application, or P4KE18CHE3/73 equivalent, this AEC-Q101 qualified device supports automotive-grade overvoltage protection where stable clamping, low leakage (<1.0 μA at VWM), and fast response time are critical for safeguarding MOSFETs, microcontrollers, and sensor interfaces.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR, it avalanches to limit transient energy across protected circuit nodes. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance.
Rated for 175 °C maximum junction temperature and 1.5 W steady-state power dissipation, the P4KE18CHE3/73 delivers repeatable surge handling under 0.01 % duty cycle conditions with 10/1000 μs waveform compliance per IEC 61000-4-5. The matte tin-plated DO-41 leads support J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 17.1 V / 18.9 V - Ensures reliable avalanche initiation above 15.3 V operating rail without false triggering |
| VWM | 15.3 V - Maximum continuous reverse working voltage compatible with 15 V logic and analog supply rails |
| IPPM | 15.9 A - Peak surge current capability with 10/1000 μs waveform, sufficient for ISO 7637-2 Pulse 1/2a/5a suppression |
| VC | 25.2 V - Clamped voltage during full-rated surge, limiting stress on downstream 28 V tolerant components |
| ID @ VWM | <1.0 μA - Ultra-low leakage preserves battery life and avoids loading of high-impedance sensor bias networks |
| TJ max. | 175 °C - Enables operation in under-hood automotive environments and industrial enclosures without derating |
| Package | DO-41 (DO-204AL) - Industry-standard axial leaded package with UL 94 V-0 molded epoxy body |
Pinout & Package
DO-41 (DO-204AL) package: axial-leaded, molded epoxy body with glass-passivated chip die. Cathode indicated by color band on one end; anode is unmarked lead. Leads are matte tin-plated, compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded lead) | Forward conduction terminal | Connected to lower-potential node (e.g., ground or return path) in unidirectional clamp configuration |
| Cathode (banded lead) | Avalanche clamping terminal | Connected to protected line (e.g., 15 V rail); conducts surge current to ground when VREV > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics with extended temperature cycling and humidity testing |
| 400 W peak pulse power (10/1000 μs) | Handles repetitive transients from relay coil de-energization and motor commutation without degradation |
| Glass passivated junction | Provides stable VBR tolerance (±5 %) and low dynamic impedance for consistent clamping performance over lifetime |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes voltage overshoot during surge events, reducing risk of latch-up or gate oxide damage in protected ICs |
| RoHS-compliant HE3 suffix | Meets JESD 201 Class 2 whisker resistance and automotive material compliance requirements per Vishay Doc. 99912 |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppressing load dump and inductive kickback on 12 V/15 V power distribution networks in ECUs and lighting modules. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between power rail and chassis ground to clamp transients before they reach voltage regulators and microcontrollers. Use Value: Limits clamped voltage to 25.2 V, protecting 28 V tolerant CAN transceivers and 16 V input LDOs while surviving repeated ISO 7637-2 pulses. |
Use Scenario: Guarding analog output lines (e.g., 4–20 mA current loops) and digital I/O (LIN, PWM) against ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-leakage (≤1.0 μA) TVS connected from signal line to ground, preserving signal integrity and avoiding DC offset errors. Use Value: Sub-μA leakage prevents loading of high-impedance sensor outputs; fast response ensures <1 ns clamping latency for IEC 61000-4-2 Level 4 (15 kV air) events. |
| Consumer Power Adapter Input Stage | Telecom Line Card Surge Protection |
Use Scenario: Protecting AC-DC adapter primary-side rectifier and secondary-side 15 V bias rails from lightning-induced surges and hot-plug transients. IC Role / Device Role / Timing Role: Standoff-rated (15.3 V) unidirectional TVS placed across DC output to absorb 400 W surges without thermal runaway. Use Value: 175 °C TJ rating enables operation in sealed enclosures; UL 94 V-0 molding ensures flame resistance in consumer safety certifications. |
Use Scenario: Front-end protection for Ethernet PHYs and DSL line drivers exposed to induced surges on twisted-pair telecom cables. IC Role / Device Role / Timing Role: Clamping device in series with common-mode chokes, diverting differential-mode surges to ground before reaching sensitive transceiver inputs. Use Value: 25.2 V clamping voltage aligns with 24 V telecom interface IC absolute maximum ratings; DO-41 form factor allows manual rework and board-level replacement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15A | DO-214AA package, 15 V VWM, 24.4 V VC at 17.2 A, 600 W PPPM | Higher power rating but larger footprint; surface-mount only | Select SMBJ15A when PCB space permits SMD layout and higher surge margin is required beyond 400 W |
| 1.5KE18A | Same DO-41 package, identical VWM/VBR/VC, but commercial-grade (non-AEC-Q101), 1.5 kW PPPM | Lacks automotive qualification; higher peak power but same clamping behavior | Choose 1.5KE18A for cost-sensitive industrial or consumer designs where AEC-Q101 is not mandated |
Compared with SMBJ15A and 1.5KE18A, the P4KE18CHE3/73 uniquely combines AEC-Q101 qualification, DO-41 through-hole compatibility, and precise 15.3 V standoff in a single-source automotive-grade solution-enabling drop-in replacement in legacy through-hole designs requiring validated reliability.
Availability
P4KE18CHE3/73 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom line card surge suppression requiring stable component supply across production lifecycles.
Supply support for P4KE18CHE3/73 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 diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade validation.
The P4KE18CHE3/73 belongs to Vishay's TransZORB® TVS family, engineered specifically for robust, standardized overvoltage protection in harsh environments-including under-hood automotive, factory automation, and infrastructure equipment.
FAQ
What is the breakdown voltage range specified for P4KE18CHE3/73?
The P4KE18CHE3/73 has a guaranteed breakdown voltage (VBR) range of 17.1 V to 18.9 V at 1.0 mA test current, measured per ANSI/IEEE C62.35. This tight ±5 % tolerance ensures predictable clamping onset across manufacturing lots and temperature extremes, critical for maintaining protection margins in 15 V system designs.
Is P4KE18CHE3/73 suitable for automotive applications?
Yes, the P4KE18CHE3/73 carries AEC-Q101 qualification (noted in the HE3 suffix), confirming compliance with stress tests for temperature cycling, humidity, mechanical shock, and surge endurance required for automotive electronics. Its 175 °C maximum junction temperature and DO-41 package with JESD 201 Class 2 whisker resistance further validate its suitability for engine control, body control, and infotainment modules.
How does the clamping voltage of P4KE18CHE3/73 compare to its breakdown voltage?
The P4KE18CHE3/73 clamps to 25.2 V at its rated 15.9 A peak pulse current (10/1000 μs), yielding a clamping ratio (VC/VBR) of approximately 1.42. This low ratio reflects efficient energy diversion and minimal voltage overshoot-ensuring protected devices see less than 25.2 V even during full-rated transients, well within safe operating limits of most 28 V tolerant ICs.
What is the maximum reverse leakage current for P4KE18CHE3/73 at its standoff voltage?
At its 15.3 V standoff voltage (VWM), the P4KE18CHE3/73 exhibits a maximum reverse leakage current (ID) of 1.0 μA at 25 °C. This ultra-low leakage preserves battery runtime in always-on systems and avoids signal corruption in high-impedance sensor circuits-such as thermistor bias networks or precision voltage references-where even nanoamp-level currents affect accuracy.
Can P4KE18CHE3/73 be used in bidirectional configurations?
No, the P4KE18CHE3/73 is a unidirectional TVS diode, identified by the "A" suffix and cathode band marking. Bidirectional variants (e.g., P4KE18CA) exist in the same family but use different internal construction and lack polarity marking. Using P4KE18CHE3/73 in bidirectional applications would result in forward conduction during negative transients, causing failure or incorrect clamping behavior.
P4KE18CHE3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AL, DO-41, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 14.5V
- Voltage - Breakdown (Min):
- 16.2V
- Voltage - Clamping (Max) @ Ipp:
- 26.5V
- Current - Peak Pulse (10/1000µs):
- 15.1A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
P4KE18CHE3/73 FAQ
1.How can I place an order for P4KE18CHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE18CHE3/73 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 P4KE18CHE3/73 reliable?
The price and inventory of P4KE18CHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE18CHE3/73 is usually 5 days.
3.What payment methods are accepted for P4KE18CHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE18CHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE18CHE3/73?
P4KE18CHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE18CHE3/73 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 P4KE18CHE3/73?
For technical support, including P4KE18CHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE18CHE3/73 requirements.
6.How does Aetrix verify that P4KE18CHE3/73 is sourced from the original manufacturer or authorized distributors?
All P4KE18CHE3/73 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 P4KE18CHE3/73 meets industry standards.
7.What is the process for return or replacement of P4KE18CHE3/73?
All P4KE18CHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with P4KE18CHE3/73, 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 P4KE18CHE3/73 part is unused and in its original packaging.
Return procedure for P4KE18CHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KE18CHE3/73 Tags
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