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Taiwan Semiconductor Corporation P6KE18
- Part No.:
- P6KE18
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
P6KE18.pdf
- Description:
- 600W, 18V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,784
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Product details
Overview
P6KE18 from Taiwan Semiconductor is a unidirectional 600W transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a nominal breakdown voltage of 18 V, clamps transients to ≤26.5 V at 23 A peak surge current, and delivers fast response (<1.0 ps from 0 V to VBR), low dynamic impedance, and <1 μA reverse leakage at 14.5 V stand-off voltage - deployed in automotive body electronics, industrial sensor interfaces, and AC/DC adapter input stages.
For engineers reviewing the P6KE18 datasheet, P6KE18 pinout, P6KE18 application, or P6KE18 equivalent, key selection criteria include its DO-204AC (DO-15) axial package, unidirectional polarity, 175 °C max junction temperature, and compliance with AEC-Q101 (when ordered as P6KE18H), UL 94V-0 molding, and RoHS/halogen-free requirements.
Technical Context
The P6KE18 operates as a silicon avalanche diode optimized for clamping high-energy transients per IEC 61000-4-5 (10/1000 μs waveform). Its single-die construction enables precise VBR tolerance (16.2–19.8 V at 1 mA test current) and stable temperature coefficient (0.088 %/°C), ensuring predictable clamping across automotive and industrial ambient ranges.
It exhibits low dynamic impedance under surge conditions, enabling effective suppression of ESD (per IEC 61000-4-2), EFT (IEC 61000-4-4), and inductive switching spikes. Polarity is marked by cathode band; mounting uses pure tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 16.2 V / 19.8 V at 1 mA - defines reliable avalanche initiation window for consistent clamping onset |
| VWM | 14.5 V - maximum continuous reverse operating voltage before significant leakage |
| VC @ IPP | 26.5 V at 23 A - peak clamped voltage during 10/1000 μs surge, limiting downstream stress |
| PPK | 600 W - non-repetitive surge power handling capability per standard waveform |
| IR @ VWM | <1 μA - minimal standby power loss and signal integrity impact in high-impedance circuits |
| TJ max | 175 °C - supports operation in under-hood automotive and high-temperature industrial environments |
| Package | DO-204AC (DO-15) - industry-standard axial leaded package with 0.400 g mass and UL 94V-0 flammability rating |
Pinout & Package
DO-204AC (DO-15) axial package with cathode band marking; leads are pure tin-plated, solderable per J-STD-002, and meet JESD 201 Class 2 whisker resistance. Polarity is unidirectional: anode (unmarked end), cathode (banded end).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to protected circuit ground or low-side return | Enables low-forward-voltage conduction during fault reset; must be routed with low-inductance path to ground plane |
| Cathode | High-impedance terminal in normal operation; clamps to VC during reverse overvoltage | Connected to protected line (e.g., 12 V rail); cathode band provides visual polarity identification for correct PCB placement |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified option (P6KE18H) | Validated for automotive applications including engine control modules and body electronics requiring reliability under thermal cycling and vibration |
| 600 W peak pulse power (10/1000 μs) | Withstands high-energy surges from load dump, inductive kickback, and lightning-induced coupling without degradation |
| Clamping voltage ≤26.5 V at 23 A | Protects 24 V-rated ICs (e.g., CAN transceivers, microcontrollers) by limiting transient overshoot below absolute maximum ratings |
| Response time <1.0 ps (0 V to VBR) | Engages before most semiconductor junctions can be damaged, critical for safeguarding high-speed analog and digital inputs |
| RoHS & halogen-free (IEC 61249-2-21) | Meets global environmental compliance mandates for industrial and consumer electronics manufacturing |
Applications
| Automotive Body Control Module (BCM) Power Input | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: 12 V battery-fed BCM power rail exposed to ISO 7637-2 load dump pulses up to 120 V. IC Role / Device Role / Timing Role: Primary clamping device placed directly at connector entry point to shunt surge energy before reaching LDOs and MCU power pins. Use Value: Limits rail voltage to ≤26.5 V during 23 A transients, preventing latch-up or permanent damage to 3.3 V/5 V logic supplies downstream. | Use Scenario: 24 V DC digital input channel receiving signals from field sensors subject to EFT bursts per IEC 61000-4-4. IC Role / Device Role / Timing Role: Front-end transient suppressor on optocoupler input side, absorbing repetitive 5 kHz burst noise without derating. Use Value: Maintains <1 μA leakage at 14.5 V, preserving input threshold accuracy while clamping 4 kV EFT peaks to safe levels for isolation barrier integrity. |
| AC/DC Adapter Secondary-Side Output | LED Driver Constant-Current Sense Line |
Use Scenario: 18 V output rail of isolated flyback adapter subjected to line-induced surges and capacitor discharge transients. IC Role / Device Role / Timing Role: Overvoltage clamp parallel to output capacitor, activated only during fault events to avoid regulation interference. Use Value: Provides 600 W surge margin with no DC power loss during normal operation due to sub-μA leakage, extending capacitor lifetime and improving efficiency. | Use Scenario: Low-voltage (≤2 V) current-sense feedback path in buck LED driver vulnerable to layout-coupled transients. IC Role / Device Role / Timing Role: Localized TVS on sense resistor node, placed within 2 mm of amplifier inputs to minimize inductance-limited clamping delay. Use Value: Sub-1 ps response ensures clamping occurs before op-amp input stage exceeds CMRR limits, preventing false dimming or shutdown commands. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ18A | Same DO-214AC (SMA) package; 18 V nominal, 29.2 V clamping at 20.9 A; slightly higher VC and lower IPP | Surface-mount only; requires rework of PCB layout; better suited for space-constrained consumer boards | Select when SMT assembly and board area savings outweigh axial through-hole robustness and thermal mass advantages |
| ON Semiconductor 1.5KE18A | Higher 1500 W rating; DO-201AD package; 29.2 V clamping at 51.7 A; larger footprint and higher cost | Used where multi-pulse surge immunity or MIL-STD-1275 compliance is required beyond AEC-Q101 scope | Choose for military-grade or heavy-duty industrial systems needing >2× surge margin and proven field longevity under repeated stress |
Compared with SMAJ18A and 1.5KE18A, the P6KE18 offers optimal balance of axial-mount mechanical stability, 600 W surge capacity, and cost-effective AEC-Q101 qualification - making it ideal for high-volume automotive and industrial power rail protection where DO-15 form factor and thermal performance are prioritized.
Availability
P6KE18 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input protection, and AC/DC adapter secondary-side overvoltage protection requiring stable component supply and long-term lifecycle support.
Supply support for P6KE18 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated Taiwanese manufacturer specializing in discrete semiconductors, including TVS diodes, rectifiers, and MOSFETs, with global distribution and AEC-Q101 certification capabilities.
The P6KE series targets cost-sensitive, high-reliability transient suppression in automotive, industrial, and consumer power systems - emphasizing robust surge handling, tight parametric control, and regulatory compliance in standard axial packages.
FAQ
What is the maximum clamping voltage of the P6KE18 under surge conditions?
The P6KE18 clamps to a maximum of 26.5 V when subjected to its rated 23 A peak pulse current (IPP) using the 10/1000 μs waveform. This value is measured at TA = 25 °C and represents the upper limit of voltage seen by downstream components during transient events - critical for ensuring compatibility with 24 V system ICs rated for ≤30 V absolute maximum.
Is the P6KE18 suitable for automotive applications?
Yes - the P6KE18H variant is AEC-Q101 qualified and validated for automotive use, including body electronics and power distribution modules. The base P6KE18 meets all electrical and thermal specifications required for such applications; however, only P6KE18H carries formal qualification documentation and traceable lot-level testing per AEC-Q101 stress requirements.
What is the standoff voltage (VWM) of the P6KE18, and why does it matter?
The P6KE18 has a maximum working peak reverse voltage (VWM) of 14.5 V. This parameter defines the highest continuous DC or RMS voltage the device can block without exceeding 1 μA leakage - essential for ensuring no unintended conduction or power loss in 12 V nominal systems where transient margins must coexist with stable quiescent operation.
How does the P6KE18 compare to bidirectional TVS diodes like P6KE18CA?
The P6KE18 is unidirectional and intended for DC line protection with defined polarity; P6KE18CA is bidirectional and used in AC or floating signal paths. They share identical VBR, VC, and PPK specs but differ in internal structure and polarity marking - substituting one for the other without circuit review risks reverse-bias failure or ineffective clamping in asymmetric topologies.
What packaging options are available for the P6KE18?
The P6KE18 is supplied in DO-204AC (DO-15) axial package, available in 3,500-piece tape-and-reel (P6KE18) and 1,500-piece ammo box (P6KE18A0G) formats. Lead finish is pure tin, compliant with J-STD-002 solderability standards and JESD 201 Class 2 whisker resistance - supporting both wave and reflow solder processes.
P6KE18 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- P6KE
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 14.5V
- Voltage - Breakdown (Min):
- 16.2V
- Voltage - Clamping (Max) @ Ipp:
- 26.5V
- Current - Peak Pulse (10/1000µs):
- 23A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
P6KE18 FAQ
1.How can I place an order for P6KE18 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6KE18 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 P6KE18 reliable?
The price and inventory of P6KE18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6KE18 is usually 5 days.
3.What payment methods are accepted for P6KE18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6KE18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6KE18?
P6KE18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6KE18 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 P6KE18?
For technical support, including P6KE18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6KE18 requirements.
6.How does Aetrix verify that P6KE18 is sourced from the original manufacturer or authorized distributors?
All P6KE18 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 P6KE18 meets industry standards.
7.What is the process for return or replacement of P6KE18?
All P6KE18 units undergo pre-shipment inspection (PSI). If there is an issue with P6KE18, 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 P6KE18 part is unused and in its original packaging.
Return procedure for P6KE18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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