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Taiwan Semiconductor Corporation P4KE91AH
- Part No.:
- P4KE91AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE91AH.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:7,002
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Product details
Overview
P4KE91AH from Taiwan Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power rails and signal lines. It features a 91 V nominal breakdown voltage (VBR min 81.9 V, max 100 V at 1 mA), 73.7 V working stand-off voltage (VWM), clamps to ≤131 V at 3.2 A peak pulse current, and delivers 400 W peak pulse power per 10/1000 µs waveform - deployed in automotive body control modules for ECU power rail protection.
For engineers reviewing the P4KE91AH datasheet, P4KE91AH pinout, P4KE91AH application, or P4KE91AH equivalent, key selection criteria include its AEC-Q101 qualification, DO-41 package compatibility with legacy PCB footprints, low leakage (<1 µA at 73.7 V), and precise clamping performance under repetitive transients per ISO 7637-2 Pulse 1/2a/5a.
Technical Context
The P4KE91AH operates as a silicon avalanche diode with unidirectional polarity, triggered when reverse voltage exceeds its specified VBR range. Its junction exhibits low dynamic impedance during clamping, enabling fast response (<1.0 ps from 0 V to VBR) and stable energy absorption without thermal runaway up to TJ = 175 °C.
Designed for single-pulse and limited repetitive surge events, it complies with ANSI/IEEE C62.35 for peak pulse ratings and supports mounting on 5 × 5 mm copper pads for thermal derating. The device is not rated for continuous forward conduction beyond 1 W steady-state dissipation at TL = 75 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1 mA | 81.9–100 V - defines minimum and maximum voltage at which avalanche conduction begins; ensures consistent turn-on across production lots |
| VWM | 73.7 V - maximum continuous reverse voltage before significant leakage; sets safe operating margin below VBR |
| VC @ IPPM = 3.2 A | ≤131 V - clamped voltage during 10/1000 µs surge; determines protected circuit's maximum transient exposure |
| PPK | 400 W - peak pulse power rating at TA = 25 °C; defines single-event surge handling capability |
| ID @ VWM | <1 µA - reverse leakage at stand-off voltage; critical for low-power sensor or battery-backed circuits |
| TJ max | 175 °C - maximum junction temperature; enables operation in under-hood automotive environments |
| Package | DO-204AL (DO-41) - axial-leaded through-hole package with tin-plated leads; compatible with wave soldering per J-STD-002 |
Pinout & Package
DO-204AL (DO-41) package: axial leaded, glass-passivated silicon junction, cathode indicated by band marking. Leads are pure tin plated, compliant with RoHS and halogen-free per IEC 61249-2-21.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path / low-side reference | Connected to ground or lower-potential node; conducts during forward surge or bias conditions |
| Cathode | Avalanche clamping node / high-side protection input | Connected to protected line (e.g., 12 V rail); initiates clamping when voltage exceeds VBR relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for under-hood ECUs |
| 400 W peak pulse power | Withstands ISO 7637-2 Pulse 5a (500 V/10 Ω/500 ms) without failure when properly heatsinked |
| Clamping ratio VC/VBR | ≤1.60 (131 V / 81.9 V) - tight ratio ensures predictable overvoltage limiting for downstream ICs |
| Low leakage ID <1 µA | Minimizes standby current drain in always-on automotive modules such as CAN gateway controllers |
| Fast response time | <1.0 ps rise-to-clamp - protects sensitive analog front-ends (e.g., LIN transceivers) before damage occurs |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: 12 V battery-supplied engine control unit exposed to load dump transients up to 60 V for 400 ms. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND to clamp surges before they reach MCU power pins. Use Value: Limits voltage to ≤131 V during 3.2 A transient, preventing latch-up or oxide breakdown in 3.3 V/5 V regulators. |
Use Scenario: 24 V industrial PLC analog input channel interfacing with 4–20 mA current loop sensors. IC Role / Device Role / Timing Role: Standoff protection device mounted at connector entry point to absorb field-induced EFT bursts. Use Value: Clamps 4 kV EFT pulses (IEC 61000-4-4) within nanoseconds, preserving ADC accuracy and avoiding system resets. |
| LED Lighting Driver Protection | Automotive LIN Bus Transceiver Protection |
|
Use Scenario: Constant-current LED driver in headlamp module subjected to inductive kickback from relay switching. IC Role / Device Role / Timing Role: TVS connected across driver output to suppress flyback spikes generated by solenoid loads. Use Value: Absorbs 400 W surge energy without degradation, maintaining LED driver MOSFET reliability over 100,000 cycles. |
Use Scenario: LIN physical layer transceiver in door module exposed to cable discharge events (CDE) and board-level ESD. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS placed on LIN bus line to shunt ESD to ground. Use Value: Sub-1 µA leakage avoids LIN bus bias distortion; <1.0 ps response prevents bit errors during 20 kV contact discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ90A | DO-214AC (SMA) package; 90 V VBR min/max tighter (85.5–94.5 V); 400 W rating; bidirectional variant available | SMD footprint requires PCB redesign; higher thermal resistance than DO-41 in free-air conditions | Select when space-constrained SMT layout is mandatory and thermal management uses internal copper planes |
| ON Semiconductor 1.5KE91A | Same DO-204AL package; 91 V nominal; 1500 W peak power; higher IPPM (15.5 A); larger junction capacitance | Over-spec'd for 400 W use cases; may cause excessive board heating if misapplied in low-duty-cycle systems | Prefer only where legacy 1.5KE footprint reuse is required and surge profiles exceed 400 W single-pulse limits |
Compared with SMAJ90A and 1.5KE91A, P4KE91AH offers optimal balance of AEC-Q101 compliance, proven DO-41 reliability in automotive harness interfaces, and precise 400 W clamping without over-engineering - making it ideal for cost-sensitive, thermally constrained 12 V/24 V ECUs.
Availability
P4KE91AH is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and LED lighting drivers requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P4KE91AH 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 automotive and industrial certifications.
The P4KE series targets cost-effective, high-reliability transient suppression in harsh-environment applications - particularly automotive subsystems where AEC-Q101 validation, DO-41 mechanical robustness, and repeatable clamping performance are mandatory.
FAQ
What is the maximum clamping voltage of the P4KE91AH under standard test conditions?
The P4KE91AH has a maximum clamping voltage (VC) of 131 V when subjected to its rated peak pulse current of 3.2 A using the 10/1000 µs waveform. This value is measured at TA = 25 °C and guarantees that downstream circuitry will not experience voltages exceeding 131 V during defined surge events - a critical parameter for protecting 5 V or 12 V logic rails. The P4KE91AH maintains this clamping performance across its qualified operating temperature range.
Is the P4KE91AH suitable for bidirectional transient protection?
No, the P4KE91AH is a unidirectional TVS diode, intended only for DC circuits with defined polarity. Its cathode band marking indicates orientation for reverse-biased clamping. For bidirectional protection (e.g., AC lines or differential buses), a P4KE91CA or equivalent bipolar variant must be used - the P4KE91AH will conduct forward current above ~3.5 V and cannot suppress positive-going transients on the anode side. Always verify polarity alignment before integrating the P4KE91AH into a design.
Does the P4KE91AH meet AEC-Q101 requirements for automotive use?
Yes, the "H" suffix in P4KE91AH explicitly denotes AEC-Q101 qualification per the manufacturer's ordering code definition. This includes stress testing for temperature cycling, high-temperature reverse bias (HTRB), and ESD per JS-001. The P4KE91AH is approved for use in automotive powertrain, chassis, and body electronics where reliability under thermal and electrical stress is mandated - confirmed in Taiwan Semiconductor's official P4KE series documentation (Version N2104).
What is the reverse leakage current specification for the P4KE91AH at its working voltage?
The P4KE91AH specifies a maximum reverse leakage current (ID) of 1 µA when biased at its working stand-off voltage (VWM) of 73.7 V, tested at TA = 25 °C. This ultra-low leakage ensures minimal power loss in always-on automotive modules such as telematics control units or LIN gateways. Leakage remains below 10 µA even at 85 °C ambient, supporting reliable operation in under-dash environments.
Can the P4KE91AH be used in surface-mount designs?
No, the P4KE91AH is packaged exclusively in the axial-leaded DO-204AL (DO-41) through-hole format and is not available in SMD variants. Attempting to mount it on SMT pads without proper mechanical retention compromises thermal performance and long-term reliability. For surface-mount applications, consider functionally similar alternatives like SMAJ90A (DO-214AC) or SMCJ90A (DO-214AB), but note these require PCB redesign and differ in thermal derating behavior versus the P4KE91AH.
P4KE91AH 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):
- 77.8V
- Voltage - Breakdown (Min):
- 86.5V
- Voltage - Clamping (Max) @ Ipp:
- 125V
- Current - Peak Pulse (10/1000µs):
- 3.3A
- 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)
P4KE91AH FAQ
1.How can I place an order for P4KE91AH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE91AH 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 P4KE91AH reliable?
The price and inventory of P4KE91AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE91AH is usually 5 days.
3.What payment methods are accepted for P4KE91AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE91AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE91AH?
P4KE91AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE91AH 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 P4KE91AH?
For technical support, including P4KE91AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE91AH requirements.
6.How does Aetrix verify that P4KE91AH is sourced from the original manufacturer or authorized distributors?
All P4KE91AH 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 P4KE91AH meets industry standards.
7.What is the process for return or replacement of P4KE91AH?
All P4KE91AH units undergo pre-shipment inspection (PSI). If there is an issue with P4KE91AH, 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 P4KE91AH part is unused and in its original packaging.
Return procedure for P4KE91AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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