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Taiwan Semiconductor Corporation P4KE27
- Part No.:
- P4KE27
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE27.pdf
- Description:
- 400W, 27V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,208
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Product details
Overview
P4KE27 from Taiwan Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 27 V nominal breakdown voltage (VBR = 24.3–29.7 V at 1 mA), 21.8 V working stand-off voltage (VWM), 39.1 V maximum clamping voltage (VC) at 10.7 A peak pulse current, and 400 W peak pulse power rating per 10/1000 μs waveform - deployed in automotive lighting control and industrial sensor interface circuits.
For engineers reviewing the P4KE27 datasheet, P4KE27 pinout, P4KE27 application, or P4KE27 equivalent, key selection criteria include clamping performance under 10.7 A surge, low leakage (<1 μA at 21.8 V), DO-41 package compatibility with manual and automated assembly, and AEC-Q101 qualification availability for automotive-grade reliability validation.
Technical Context
The P4KE27 operates as a silicon avalanche diode with fast response time (<1.0 ps from 0 V to VBR), enabling effective suppression of ESD and electrical fast transients before sensitive downstream circuitry is damaged. Its unidirectional polarity and cathode-band marking define anode-to-cathode conduction path during reverse-biased overvoltage events.
Thermal design relies on its 175 °C maximum junction temperature and 1 W steady-state power dissipation at 75 °C lead temperature, with derating above 25 °C ambient per published curve. The device exhibits a +0.096 %/°C temperature coefficient of VBR, indicating predictable voltage drift across operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1 mA | 24.3–29.7 V - defines minimum/maximum voltage at which avalanche conduction begins; sets overvoltage trip threshold tolerance |
| VWM | 21.8 V - maximum continuous reverse voltage the device blocks without significant leakage; must exceed system operating voltage |
| VC @ IPPM = 10.7 A | 39.1 V - clamped voltage seen by protected circuit during full-rated 400 W transient; determines stress on downstream components |
| PPK | 400 W - peak pulse power handling per 10/1000 μs waveform; defines surge energy absorption capability |
| ID @ VWM | <1 μA - reverse leakage current at working voltage; ensures minimal standby power loss and signal integrity |
| TJ max | 175 °C - maximum allowable junction temperature; enables operation in under-hood or high-ambient industrial environments |
| Package | DO-204AL (DO-41) - axial-leaded through-hole package with tin-plated leads compliant to J-STD-002 solderability |
Pinout & Package
DO-204AL (DO-41) package: axial-leaded, glass-passivated silicon junction, cathode indicated by band-marked end. Leads are pure tin plated and suitable for wave or hand soldering per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Low-side reference node | Connected to ground or lower-potential rail; completes conduction path during reverse overvoltage |
| Cathode (banded end) | Protected line input | Connected to supply or signal line being protected; avalanche breakdown occurs between cathode and anode |
Key Features
| Feature | Design Value |
|---|---|
| Avalanche clamping action | Provides precise, repeatable voltage limiting without degradation after multiple 400 W transients |
| Low dynamic impedance | Ensures stable clamping voltage across varying surge currents - critical for protecting 3.3 V/5 V logic interfaces |
| Sub-nanosecond response | <1.0 ps rise time enables suppression of ESD events before IC input structures fail |
| UL 94V-0 molding compound | Meets flammability safety requirements for enclosed industrial and automotive enclosures |
| AEC-Q101 qualified version available | P4KE27H variant supports automotive applications requiring validated reliability per stress-test standard |
Applications
| Automotive LED Headlamp Driver | Industrial PLC Digital Input Module |
|---|---|
Use Scenario: Protects MOSFET gate drivers and microcontroller I/O from load-dump spikes up to 35 V during vehicle battery disconnect/reconnect events. IC Role / Device Role / Timing Role: Primary clamping element placed between 24 V rail and ground, absorbing >99% of 400 W surge energy. Use Value: Limits voltage excursion to ≤39.1 V, preventing latch-up or oxide rupture in 40 V-rated driver ICs. |
Use Scenario: Shields 24 V digital input optocoupler front-end from inductive kickback when solenoid valves switch off. IC Role / Device Role / Timing Role: Standoff voltage (21.8 V) exceeds nominal 24 V supply while clamping transients within safe margin of opto-IC absolute max rating. Use Value: Enables robust 10 kV ESD immunity per IEC 61000-4-2 without external RC filtering. |
| Smart Building Occupancy Sensor | Medical Infusion Pump Power Supply |
Use Scenario: Guards PIR sensor signal conditioning amplifier against EFT bursts induced by nearby relay switching in HVAC control panels. IC Role / Device Role / Timing Role: Placed across amplifier supply pins to shunt sub-microsecond transients before they couple into analog front-end. Use Value: Sub-1.0 ps response prevents signal corruption or false trigger events during 5 kHz EFT testing. |
Use Scenario: Suppresses 10/1000 μs surges on 24 V DC input derived from external AC/DC adapter during hospital mains disturbances. IC Role / Device Role / Timing Role: First-line defense upstream of DC/DC converter, reducing stress on input capacitors and controller ICs. Use Value: 39.1 V clamping ensures downstream 40 V-rated power ICs remain within SOA limits during 400 W surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse P4KE27A | Higher VBR tolerance (25.7–28.4 V), tighter 5% VWM (23.1 V), same DO-41 package and 400 W rating | Better suited for designs requiring tighter clamping consistency across production lots | Select P4KE27A when ±5% VBR spread is preferred over ±10% in base P4KE27 |
| ON Semiconductor 1.5KE27A | Same VBR/VWM specs but higher 1.5 kW peak power rating; larger DO-201 package (not pin-compatible) | Used where higher single-event energy absorption is required, e.g., telecom power entry | Choose 1.5KE27A only if board layout allows DO-201 footprint and 1.5 kW rating is needed |
Compared with P4KE27, the P4KE27A offers improved parameter consistency for precision clamping, while the 1.5KE27A delivers greater surge capacity at the cost of larger size and non-interchangeable mounting - making P4KE27 optimal for space-constrained 400 W protection in DO-41 layouts.
Availability
P4KE27 is available at Aetrix Electronics and suitable for automotive lighting systems, industrial PLC input protection, smart building sensor interfaces, and medical device power supply surge suppression requiring stable component supply and long-term manufacturability.
Supply support for P4KE27 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 qualification capabilities.
The P4KE series was developed for cost-effective, high-reliability transient suppression in automotive, industrial, and consumer power systems - emphasizing robust DO-41 packaging, tight thermal specs, and standardized 10/1000 μs surge compliance.
FAQ
What is the maximum clamping voltage of P4KE27 under rated surge conditions?
The P4KE27 clamps to a maximum of 39.1 V when subjected to its rated 10.7 A peak pulse current (IPPM), corresponding to a 400 W transient per the 10/1000 μs waveform. This value is measured at TA = 25°C and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The P4KE27 maintains this clamping performance across its specified junction temperature range.
Is P4KE27 suitable for bidirectional signal line protection?
No, P4KE27 is a unidirectional TVS diode intended for DC rail protection where polarity is fixed. For bidirectional applications such as AC lines or differential data buses, the bipolar P4KE27CA variant must be used. The P4KE27's cathode band marking and asymmetric IV characteristics make it unsuitable for symmetrical transient suppression without external circuitry.
Does P4KE27 meet automotive reliability standards?
The base P4KE27 is not AEC-Q101 qualified; however, the P4KE27H variant - identical in electrical specs and DO-41 packaging - is fully AEC-Q101 certified. Engineers specifying P4KE27 for automotive use must select the 'H' suffix part to ensure compliance with stress testing for temperature cycling, humidity, and mechanical shock required in vehicle ECUs and lighting modules.
What is the reverse leakage current of P4KE27 at its working voltage?
At its 21.8 V working stand-off voltage (VWM), the P4KE27 exhibits a maximum reverse leakage current (ID) of 1 μA at TA = 25°C. This low leakage ensures minimal power loss in always-on systems and preserves signal integrity in high-impedance sensor interfaces. Leakage remains below 5 μA up to 125°C per thermal derating curves in the P4KE27 datasheet.
Can P4KE27 replace P4KE24 or P4KE30 in an existing design?
P4KE27 is not a direct replacement for P4KE24 or P4KE30 due to differences in VWM (21.8 V vs. 19.4 V / 24.3 V) and clamping voltage (39.1 V vs. 34.7 V / 43.5 V). Substituting alters the protection margin relative to system operating voltage and may cause premature clamping or insufficient surge suppression. Redesign verification is required before interchanging P4KE27 with adjacent voltage grades.
P4KE27 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-204AL, DO-41, Axial
- Series:
- P4KE
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 10.7A
- Power - Peak Pulse:
- 400W
- 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-204AL (DO-41)
P4KE27 FAQ
1.How can I place an order for P4KE27 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE27 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 P4KE27 reliable?
The price and inventory of P4KE27 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE27 is usually 5 days.
3.What payment methods are accepted for P4KE27?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE27 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE27?
P4KE27 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE27 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 P4KE27?
For technical support, including P4KE27 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE27 requirements.
6.How does Aetrix verify that P4KE27 is sourced from the original manufacturer or authorized distributors?
All P4KE27 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 P4KE27 meets industry standards.
7.What is the process for return or replacement of P4KE27?
All P4KE27 units undergo pre-shipment inspection (PSI). If there is an issue with P4KE27, 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 P4KE27 part is unused and in its original packaging.
Return procedure for P4KE27:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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