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Taiwan Semiconductor Corporation P6KE18CH
- Part No.:
- P6KE18CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
P6KE18CH.pdf
- Description:
- 600W, 18V, BIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:6,854
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Product details
Overview
P6KE18CH from Taiwan Semiconductor is a unidirectional 600W transient voltage suppressor (TVS) diode designed for primary-side overvoltage protection in power supplies and automotive electronics. It features a nominal breakdown voltage of 18 V, clamping voltage of 25.2 V at 25 A peak surge current, stand-off voltage of 15.3 V, and low dynamic impedance for fast response to ESD and lightning-induced transients.
For engineers reviewing the P6KE18CH datasheet, P6KE18CH pinout, P6KE18CH application, or P6KE18CH equivalent, this device is selected for high-reliability DC rail protection where AEC-Q101 qualification, sub-1 ns response time, and UL recognition (E-326243) are required in automotive body control modules, LED drivers, and industrial sensor interfaces.
Technical Context
The P6KE18CH operates as a unidirectional avalanche diode with a DO-204AC (DO-15) axial package and cathode band polarity marking. Its junction temperature range spans −55°C to +175°C, supporting under-hood automotive environments. The device meets IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and ISO 7637-2 pulse 1/2a/3a immunity requirements when applied with proper PCB layout.
It delivers 600 W non-repetitive peak pulse power at the standard 10/1000 µs waveform, with typical reverse leakage <1 µA at 15.3 V and maximum clamping voltage of 25.2 V at 25 A. Its temperature coefficient of VBR is 0.088 %/°C, enabling stable threshold behavior across thermal operating ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Voltage | 18 V - defines rated standoff voltage level for DC supply rail selection |
| Breakdown Voltage (VBR) | 17.1–18.9 V at 1 mA - ensures reliable avalanche conduction onset within tight tolerance |
| Stand-Off Voltage (VWM) | 15.3 V - maximum continuous reverse working voltage without leakage exceedance |
| Clamping Voltage (VC) | 25.2 V at 25 A - limits downstream IC voltage stress during 10/1000 µs surge events |
| Peak Pulse Power (PPK) | 600 W - supports robust protection against ISO 7637-2 Pulse 1 (inductive load dump) |
| Junction Temperature (TJ) | −55°C to +175°C - enables operation in engine compartment and industrial ambient conditions |
| AEC-Q101 Qualified | Yes - certified for automotive-grade reliability per stress test requirements |
Pinout & Package
Package: DO-204AC (DO-15), axial leaded, epoxy-molded case meeting UL 94V-0 flammability rating. Cathode indicated by band marking; leads are pure tin-plated and solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage return path; forms current sink during clamping |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 12 V battery rail); conducts avalanche current to anode during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Fast response time | Typically <1.0 ps from 0 V to VBR - enables suppression before sensitive logic or analog circuitry sustains damage |
| Low dynamic impedance | Ensures minimal voltage overshoot during high di/dt transients (e.g., relay coil de-energization) |
| UL recognition | File #E-326243 - validates safety compliance for end-equipment certification (e.g., automotive ECUs) |
| AEC-Q101 qualification | Qualified version ('H' suffix) - confirms reliability for automotive applications including temperature cycling and HTRB |
| RoHS & halogen-free | Compliant per IEC 61249-2-21 - meets environmental requirements for global OEM supply chains |
Applications
| Automotive Body Control Module (BCM) | Industrial 24 V PLC Input Protection |
|---|---|
Use Scenario: Protects microcontroller GPIO and CAN transceiver power rails from load dump and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 12 V battery rail and local LDO input. Use Value: Clamps 12 V rail to ≤25.2 V during ISO 7637-2 Pulse 1 (−100 V, 50 ms), preventing LDO overvoltage failure. |
Use Scenario: Shields digital input optocoupler circuits from field-wiring induced transients in factory automation. IC Role / Device Role / Timing Role: Standoff-rated TVS on 24 V DC input stage ahead of series current-limiting resistor. Use Value: Limits transient energy to <600 W at 10/1000 µs, ensuring optocoupler CMTI integrity and long-term insulation reliability. |
| LED Driver Power Stage | Smart Meter Battery Backup Circuit |
Use Scenario: Safeguards buck controller IC and MOSFET gate driver from inductive kickback during LED string switching. IC Role / Device Role / Timing Role: TVS connected across input capacitor on primary side of isolated LED driver. Use Value: Absorbs up to 25 A surge current while maintaining clamped voltage below 25.2 V, preserving gate oxide integrity. |
Use Scenario: Protects supercapacitor charging circuit and RTC backup supply from ESD and EFT events on coin-cell replacement port. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA @ 15.3 V) TVS on 3.3 V backup rail feeding real-time clock IC. Use Value: Prevents false resets or data corruption during IEC 61000-4-2 contact discharge (±8 kV) without draining backup energy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A | Lower peak power (400 W), SMA package (surface-mount), no AEC-Q101 qualification | Suitable for space-constrained consumer PCBs but not automotive under-hood use | Select when board area is critical and automotive qualification is unnecessary |
| 1.5KE18A | Same DO-15 package, 1500 W rating, higher clamping voltage (27.7 V), no AEC-Q101 option | Better for high-energy surges but less precise clamping margin for 18 V systems | Choose for legacy industrial designs requiring higher surge margin and lower cost |
Compared with SMAJ18A and 1.5KE18A, the P6KE18CH provides AEC-Q101 assurance and tighter clamping (25.2 V vs. 27.7 V), making it optimal for automotive 12 V rail protection where reliability and voltage headroom are jointly constrained.
Availability
P6KE18CH is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, LED lighting drivers, and smart meter backup circuits requiring stable component supply with full traceability and lifecycle management.
Supply support for P6KE18CH 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs, with global distribution and AEC-Q101-compliant product lines.
The P6KE series was developed specifically for automotive and industrial transient suppression, emphasizing high surge robustness, low clamping voltage, and extended temperature operation in harsh environments.
FAQ
What does the 'H' suffix in P6KE18CH signify?
The 'H' suffix in P6KE18CH indicates AEC-Q101 qualification, confirming that the device has passed rigorous automotive reliability tests including temperature cycling, high-temperature reverse bias, and accelerated life testing. This makes P6KE18CH suitable for under-hood and chassis-mounted applications where standard commercial-grade TVS diodes would not meet OEM requirements.
How does P6KE18CH differ from the non-'H' variant P6KE18A?
The P6KE18CH differs from P6KE18A solely in its AEC-Q101 qualification status and associated process controls - electrical parameters (VBR, VC, PPK) and package are identical. P6KE18A is rated for industrial/commercial use only, while P6KE18CH is validated for automotive deployment per JESD22-A108 and A110 standards.
What is the maximum peak surge current the P6KE18CH can handle?
The P6KE18CH supports a maximum peak surge current (IPP) of 25 A under the standard 10/1000 µs waveform, corresponding to its 600 W peak pulse power rating. At this current, the clamping voltage remains ≤25.2 V, ensuring downstream components see controlled overvoltage stress.
Is P6KE18CH unidirectional or bidirectional?
P6KE18CH is a unidirectional TVS diode, configured for protection of positive DC rails only. Its cathode band marking identifies the high-side connection point, and it conducts only during reverse-biased overvoltage events - unlike bidirectional variants (e.g., P6KE18CA) which protect AC or dual-polarity signals.
Does P6KE18CH require a heatsink for continuous operation?
No, P6KE18CH does not require a heatsink for transient suppression duty cycles, as it is rated for non-repetitive surges only. Its steady-state power dissipation is limited to 5 W at 75°C ambient (with specified lead length), and normal operation involves brief, infrequent clamping events - not continuous power handling.
P6KE18CH 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:
- -
- 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):
- 23A
- Power - Peak Pulse:
- 600W
- 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-204AC (DO-15)
P6KE18CH FAQ
1.How can I place an order for P6KE18CH through Aetrix?
Please submit a Request for Quotation (RFQ) for P6KE18CH 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 P6KE18CH reliable?
The price and inventory of P6KE18CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6KE18CH is usually 5 days.
3.What payment methods are accepted for P6KE18CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6KE18CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6KE18CH?
P6KE18CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6KE18CH 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 P6KE18CH?
For technical support, including P6KE18CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6KE18CH requirements.
6.How does Aetrix verify that P6KE18CH is sourced from the original manufacturer or authorized distributors?
All P6KE18CH 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 P6KE18CH meets industry standards.
7.What is the process for return or replacement of P6KE18CH?
All P6KE18CH units undergo pre-shipment inspection (PSI). If there is an issue with P6KE18CH, 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 P6KE18CH part is unused and in its original packaging.
Return procedure for P6KE18CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6KE18CH Tags
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