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Taiwan Semiconductor Corporation P4KE91
- Part No.:
- P4KE91
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE91.pdf
- Description:
- 400W, 91V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,300
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Product details
Overview
P4KE91 from Taiwan Semiconductor is a unidirectional 400W transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a nominal breakdown voltage of 91V, clamps transients to ≤131V at 3.2A peak pulse current, and maintains low leakage (<1μA at 73.7V working stand-off), making it suitable for automotive body electronics, industrial sensor interfaces, and AC/DC adapter input stages.
For engineers reviewing the P4KE91 datasheet, P4KE91 pinout, P4KE91 application, or P4KE91 equivalent, key selection criteria include its DO-41 package compatibility, 10/1000μs surge rating, unidirectional polarity marking, and AEC-Q101 qualification option - all critical for ESD and lightning-induced transient suppression in safety-critical embedded systems.
Technical Context
The P4KE91 operates as a silicon avalanche diode with sharp reverse-breakdown characteristics, triggered when transient voltage exceeds its 81.9–100V VBR range at 1mA test current. Its low dynamic impedance ensures rapid clamping response (<1.0ps from 0V to VBR) and stable energy absorption across -55°C to +175°C junction temperature.
It complies with ANSI/IEEE C62.35 for peak pulse power rating and is rated for non-repetitive 400W surges under 10/1000μs waveform. The device exhibits a positive temperature coefficient of VBR (0.106%/°C), enabling predictable voltage drift during thermal stress in high-power environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 81.9V to 100V at 1mA - defines precise clamping onset threshold for overvoltage events |
| VWM | 73.7V - maximum continuous DC operating voltage before leakage rises significantly |
| VC @ IPPM | 131V at 3.2A - peak clamped voltage during 400W transient, limiting downstream IC stress |
| IPPM | 3.2A - maximum non-repetitive surge current the device safely shunts without degradation |
| PPK | 400W - peak pulse power handling capability per 10/1000μs standard waveform |
| TJ max | +175°C - enables operation in under-hood automotive or high-ambient industrial environments |
| Package | DO-204AL (DO-41) - industry-standard axial leaded package with tin-plated leads, UL 94V-0 rated molding |
Pinout & Package
DO-204AL (DO-41) package: axial-leaded, glass-passivated silicon junction, cathode indicated by band marking on body. Leads are pure tin-plated and solderable per J-STD-002; weight ≈0.300g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to circuit ground or return path; forms avalanche conduction path during overvoltage |
| Cathode | High-side transient input terminal | Marked with band; connects to protected line (e.g., 24V rail); conducts when VIN > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified variant available | Enables use in automotive powertrain and chassis modules requiring certified reliability |
| 400W peak pulse power (10/1000μs) | Withstands high-energy surges from load dump or inductive switching without failure |
| Clamping voltage ≤131V at 3.2A | Protects downstream 100V-rated MOSFETs and controllers from destructive overvoltage |
| Reverse leakage <1μA at 73.7V | Minimizes standby power loss in always-on battery-powered systems |
| Fast response time <1.0ps | Engages before sensitive logic or analog circuitry sustains damage from fast-rising ESD |
Applications
| Automotive Body Control Module | Industrial PLC Input Protection |
|---|---|
Use Scenario: 12V/24V supply rail exposed to load-dump transients up to 120V in vehicle door modules. IC Role / Device Role: Primary overvoltage clamp placed upstream of LDO regulators and microcontrollers. Use Value: Limits rail voltage to ≤131V during ISO 7637-2 Pulse 5a events, preventing brownout or latch-up in MCU power domains. |
Use Scenario: 24V digital input channel subject to field-wiring induced surges in factory automation cabinets. IC Role / Device Role: First-line TVS element before optocoupler or Schmitt-trigger input stage. Use Value: Absorbs 400W transients while maintaining <1μA leakage, ensuring clean signal detection and long-term reliability. |
| AC/DC Adapter Secondary Side | Smart Lighting Driver ESD Protection |
Use Scenario: Output rectifier node in flyback converters where output capacitance stores surge energy. IC Role / Device Role: Parallel-connected TVS across secondary winding or post-rectifier filter capacitor. Use Value: Clamps flyback voltage spikes caused by transformer leakage inductance, protecting synchronous rectifiers and feedback optos. |
Use Scenario: Data line (e.g., DALI or 0–10V dimming) routed alongside mains wiring in LED luminaires. IC Role / Device Role: Unidirectional TVS on control signal path to suppress coupled EFT bursts and contact discharge. Use Value: Responds in <1ps to 4kV ESD events per IEC 61000-4-2, preserving communication integrity without signal distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90A | Surface-mount SMB package; 90V standoff, 135V clamping at 3.3A; same 400W rating | Requires PCB re-layout; better thermal performance in high-density designs | Select when board space is constrained and automated assembly is preferred over through-hole |
| 1.5KE91A | Higher 1500W peak power; DO-201 package; 91V nominal, 137V clamping at 11A | Over-specified for 400W needs; larger footprint and higher cost | Choose only if system-level surge testing requires margin beyond 400W, e.g., telecom central office equipment |
Compared with SMBJ90A and 1.5KE91A, the P4KE91 offers optimal balance of proven axial-leaded reliability, AEC-Q101 availability, and precise 91V clamping for cost-sensitive 24V/48V industrial and automotive subsystems - without over-engineering or layout disruption.
Availability
P4KE91 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input protection, and AC/DC adapter secondary-side surge suppression requiring stable component supply and long-lifecycle support.
Supply support for P4KE91 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, and rectifiers with global distribution and AEC-Q101 certification capability.
The P4KE series targets cost-effective, high-reliability transient protection for automotive, industrial, and consumer power systems - emphasizing robust surge handling, tight parameter tolerances, and standardized DO-41 compatibility.
FAQ
What is the maximum clamping voltage of the P4KE91 under standard surge conditions?
The P4KE91 clamps to a maximum of 131V when subjected to its rated 400W peak pulse (10/1000μs waveform) at 3.2A. This value is measured per ANSI/IEEE C62.35 and represents the upper limit of voltage seen by downstream components during transient suppression. The P4KE91 maintains this clamping performance across its full operating temperature range of -55°C to +175°C.
Is the P4KE91 suitable for automotive applications?
Yes - an AEC-Q101 qualified variant (P4KE91H) is available and explicitly listed in the ordering information. The P4KE91 meets automotive reliability requirements for temperature cycling, humidity resistance, and mechanical robustness. Its 175°C maximum junction temperature and low leakage support under-hood and body-control module deployments where the P4KE91 serves as primary overvoltage protection on 12V/24V rails.
How does the P4KE91 differ from the P4KE91A variant?
The P4KE91A has tighter breakdown voltage tolerance: 86.5–95.5V vs. 81.9–100V for the P4KE91, with identical 77.8V working stand-off and 125V clamping voltage. Both share the same DO-41 package, 400W rating, and thermal specs. The P4KE91A is preferred in precision-clamp applications where consistent VBR minimizes design margin uncertainty - whereas the standard P4KE91 offers broader tolerance at lower cost.
What is the reverse leakage current specification for the P4KE91 at its working stand-off voltage?
The P4KE91 exhibits ≤1μA reverse leakage current at its rated working stand-off voltage of 73.7V, measured at 25°C. This ultra-low leakage ensures minimal power loss in always-on circuits such as battery-backed sensors or automotive wake-up receivers. The P4KE91 maintains sub-5μA leakage even at 85°C ambient, supporting reliable operation in thermally demanding environments.
Can the P4KE91 be used in bidirectional configurations?
No - the P4KE91 is a unidirectional TVS diode, intended for DC line protection with defined anode/cathode polarity. For bidirectional AC or data-line protection, Taiwan Semiconductor offers the P4KE91CA variant (with "CA" suffix), which provides symmetrical clamping in both directions. Using the P4KE91 in reverse-biased mode beyond its specified parameters risks permanent breakdown and must be avoided.
P4KE91 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):
- 73.7V
- Voltage - Breakdown (Min):
- 81.9V
- Voltage - Clamping (Max) @ Ipp:
- 131V
- Current - Peak Pulse (10/1000µs):
- 3.2A
- 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)
P4KE91 FAQ
1.How can I place an order for P4KE91 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE91 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 P4KE91 reliable?
The price and inventory of P4KE91 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE91 is usually 5 days.
3.What payment methods are accepted for P4KE91?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE91 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE91?
P4KE91 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE91 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 P4KE91?
For technical support, including P4KE91 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE91 requirements.
6.How does Aetrix verify that P4KE91 is sourced from the original manufacturer or authorized distributors?
All P4KE91 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 P4KE91 meets industry standards.
7.What is the process for return or replacement of P4KE91?
All P4KE91 units undergo pre-shipment inspection (PSI). If there is an issue with P4KE91, 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 P4KE91 part is unused and in its original packaging.
Return procedure for P4KE91:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KE91 Tags
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