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Taiwan Semiconductor Corporation P4KE91A
- Part No.:
- P4KE91A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE91A.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:5,156
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Product details
Overview
P4KE91A 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 91 V, a working stand-off voltage of 77.8 V, clamps transients to ≤125 V at 3.3 A peak pulse current, and delivers sub-nanosecond response time for ESD and EFT immunity in automotive body electronics.
For engineers reviewing the P4KE91A datasheet, P4KE91A pinout, P4KE91A application, or P4KE91A equivalent, key selection criteria include its DO-41 package compatibility, 125 V clamping performance at 10/1000 µs surge, low leakage (<1 µA at 77.8 V), AEC-Q101 qualification option, and suitability for 12 V/24 V automotive subsystems requiring robust transient suppression without derating.
Technical Context
The P4KE91A operates as a silicon avalanche diode with unidirectional polarity, activated only when reverse voltage exceeds its specified breakdown range (86.5–95.5 V at 1 mA test current). Its clamping action limits transient energy by diverting surge current to ground while maintaining system voltage below 125 V - critical for safeguarding CAN transceivers, microcontroller I/O, and sensor interfaces.
Thermal design relies on its 175 °C maximum junction temperature and 1 W steady-state power dissipation at 75 °C lead temperature. The device meets UL 94V-0 flammability standards, uses pure tin-plated leads compliant with J-STD-002, and exhibits a 0.106 %/°C temperature coefficient of VBR, ensuring stable clamping across automotive operating ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 77.8 V - Maximum continuous reverse operating voltage before conduction begins; sets safe margin below system rail (e.g., 80 V nominal bus) |
| VBR @ IT=1 mA | 86.5–95.5 V - Confirmed avalanche onset range; ensures reliable triggering above normal operating voltage |
| VC @ IPPM=3.3 A | ≤125 V - Clamped voltage during 10/1000 µs surge; defines maximum stress imposed on protected ICs |
| IPPM | 3.3 A - Peak pulse current capability at rated clamping voltage; determines survivability against IEC 61000-4-5 Level 3 surges |
| PPK | 400 W - Non-repetitive surge power rating; validates protection for short-duration transients like load dump or inductive kick |
| IR @ VWM | <1 µA - Reverse leakage at stand-off voltage; minimizes standby power loss and avoids false triggering |
| TJ max | 175 °C - Maximum junction temperature; supports operation in under-hood automotive environments |
Pinout & Package
Package: DO-204AL (DO-41), axial-leaded, epoxy-molded case with cathode band marking for unidirectional polarity. Dimensions conform to JEDEC DO-41 standard; weight ≈0.300 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference terminal | Connected to system ground or low-side return path; completes conduction loop during transient events |
| Cathode | Protected line input | Connected to line being protected (e.g., 12 V supply rail); reverse-biased during normal operation, avalanches during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power | Enables single-device protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 10/1000 µs surges without external current sharing |
| Clamping voltage ≤125 V | Keeps downstream 5 V/3.3 V logic ICs within absolute maximum ratings during 3.3 A transient events |
| Response time <1.0 ps | Ensures suppression activation before ESD pulses (IEC 61000-4-2) propagate into sensitive analog front-ends |
| AEC-Q101 qualified option | Validates reliability for automotive applications including body control modules, lighting drivers, and infotainment power supplies |
| UL 94V-0 flammability rating | Confirms flame-retardant encapsulation suitable for enclosed automotive enclosures and industrial control cabinets |
Applications
| Automotive Body Control Module | Industrial PLC Digital Input |
|---|---|
Use Scenario: Protecting LIN bus interface and power supply inputs in door module ECUs exposed to battery load dump and alternator ripple. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V rail and LIN signal line, absorbing up to 400 W surges without failure. Use Value: Prevents latch-up or permanent damage to MCU GPIOs and LIN transceivers during vehicle-level EMC testing per CISPR 25 Class 3. | Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers subjected to inductive switching noise from solenoid valves. IC Role / Device Role / Timing Role: Fast-acting shunt protector placed between field input and optocoupler input stage. Use Value: Limits transient voltage to ≤125 V, ensuring optocoupler CTR stability and eliminating false triggering during 100 ns–1 µs fast edges. |
| LED Driver Power Supply | Smart Meter Communication Port |
Use Scenario: Suppressing flyback spikes from MOSFET switching in constant-current LED drivers used in street lighting. IC Role / Device Role / Timing Role: Unidirectional TVS across output capacitor terminals to clamp inductive kick from boost converter inductor. Use Value: Maintains output voltage regulation integrity by preventing overshoot beyond 125 V, avoiding overvoltage shutdown of driver ICs. | Use Scenario: Protecting RS-485 transceiver pins in utility smart meters installed in electrically noisy substations. IC Role / Device Role / Timing Role: Line-side TVS on differential pair (A/B) and common-mode ground, rated for 10/1000 µs surges per IEC 61000-4-5 Level 3. Use Value: Guarantees communication continuity after repeated 4 kV surges by limiting clamped voltage below transceiver's 13.2 V abs max rating. |
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 | DO-214AA package; 90 V nominal VBR; 600 W PPK; 135 V VC @ 4.4 A | Surface-mount alternative with higher surge rating but larger footprint; requires PCB rework | Select when board space allows SMD placement and higher 600 W surge margin is required |
| 1.5KE91A | Same DO-41 package; identical VBR/VC specs; 1500 W PPK; higher IPPM (12.3 A) | Higher-power variant for systems facing more severe transients (e.g., heavy-duty truck load dump) | Choose when legacy DO-41 layout must be retained but 1500 W surge headroom is needed |
Compared with SMBJ90A and 1.5KE91A, the P4KE91A offers optimal balance of axial-leaded DO-41 compatibility, 400 W surge handling, and tight 125 V clamping - making it ideal for cost-sensitive, space-constrained automotive and industrial designs where moderate transient severity is expected.
Availability
P4KE91A is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC inputs, LED driver protection, and smart meter communication ports requiring stable component supply and long-term lifecycle support.
Supply support for P4KE91A 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 is part of TSC's high-reliability transient suppression portfolio, engineered specifically for automotive and industrial applications demanding robust ESD/EFT immunity, stable clamping, and long-term parametric consistency under thermal stress.
FAQ
What is the clamping voltage of the P4KE91A under a 10/1000 µs surge?
The P4KE91A clamps to a maximum of 125 V when subjected to a 10/1000 µs waveform at its rated peak pulse current of 3.3 A. This value is guaranteed per the manufacturer's electrical characteristics table and verified under standard test conditions (TA = 25°C). The P4KE91A maintains this clamping performance across its full operating temperature range, supporting reliable protection in automotive and industrial environments.
Is the P4KE91A unidirectional or bidirectional?
The P4KE91A is a unidirectional transient voltage suppressor, indicated by the absence of "C" or "CA" suffix and confirmed by its cathode-band marking and single-polarity breakdown specification. It conducts only during reverse overvoltage events and remains non-conductive under forward bias - making it suitable for DC rail protection where polarity is fixed. The P4KE91A does not provide symmetrical clamping in both directions.
Does the P4KE91A meet AEC-Q101 qualification?
The base P4KE91A is not automatically AEC-Q101 qualified; however, the AEC-Q101-compliant version is designated as P4KE91AH (with "H" suffix). This variant undergoes extended stress testing per AEC-Q101 Rev D, including HTGB, HTRB, and temperature cycling. For automotive applications requiring qualification evidence, specify P4KE91AH - the P4KE91A itself is intended for industrial and commercial use unless otherwise certified.
What is the maximum junction temperature rating for the P4KE91A?
The P4KE91A has a maximum junction temperature (TJ) rating of +175 °C, enabling reliable operation in high-ambient environments such as engine compartments or enclosed industrial enclosures. This rating is supported by its DO-41 package construction, pure tin-plated leads, and UL 94V-0 compliant molding compound. Derating curves in the datasheet define allowable power dissipation above 25 °C ambient, ensuring thermal safety in continuous or intermittent surge conditions.
How does the P4KE91A compare to the P4KE91 (non-A) variant?
The P4KE91A offers tighter breakdown voltage tolerance (86.5–95.5 V) compared to the standard P4KE91 (81.9–100 V), resulting in more predictable clamping onset and reduced risk of premature conduction. Both share identical package (DO-41), power rating (400 W), and clamping voltage (125 V), but the "A" suffix denotes enhanced VBR uniformity - critical for designs requiring precise overvoltage thresholds. The P4KE91A is recommended where consistent turn-on behavior across production lots is essential.
P4KE91A 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
P4KE91A FAQ
1.How can I place an order for P4KE91A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE91A 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 P4KE91A reliable?
The price and inventory of P4KE91A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE91A is usually 5 days.
3.What payment methods are accepted for P4KE91A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE91A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE91A?
P4KE91A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE91A 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 P4KE91A?
For technical support, including P4KE91A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE91A requirements.
6.How does Aetrix verify that P4KE91A is sourced from the original manufacturer or authorized distributors?
All P4KE91A 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 P4KE91A meets industry standards.
7.What is the process for return or replacement of P4KE91A?
All P4KE91A units undergo pre-shipment inspection (PSI). If there is an issue with P4KE91A, 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 P4KE91A part is unused and in its original packaging.
Return procedure for P4KE91A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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