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Taiwan Semiconductor Corporation P6KE91A
- Part No.:
- P6KE91A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
P6KE91A.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO15
- Quantity:
- Payment:
- Shipping:
Inventory:3,008
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Product details
Overview
P6KE91A from Taiwan Semiconductor is a unidirectional 600W transient voltage suppressor (TVS) diode designed for primary-level overvoltage protection in DC power rails and signal lines. It features a nominal breakdown voltage of 91 V, clamps transients to ≤125 V at 5.0 A peak pulse current, and delivers fast response (<1.0 ps from 0 V to VBR), low dynamic impedance, and <1 µA reverse leakage at 77.8 V standoff voltage. It is widely deployed in automotive body electronics and industrial power supply input stages.
For engineers reviewing the P6KE91A datasheet, P6KE91A pinout, P6KE91A application, or P6KE91A equivalent, key selection criteria include its DO-204AC (DO-15) axial package, unidirectional polarity with cathode band marking, 125 V clamping performance at 5.0 A, and AEC-Q101 qualification status - critical for automotive-grade surge immunity design.
Technical Context
The P6KE91A operates as a silicon avalanche diode optimized for transient suppression under 10/1000 µs waveform stress. Its junction structure enables sub-nanosecond turn-on and maintains stable clamping across -55°C to +175°C operating temperature range, with thermal derating defined per Fig.2 in the datasheet.
It is rated for non-repetitive peak impulse power of 600 W, steady-state power dissipation of 5 W at 75°C (on 5×5 mm copper pads), and withstands 100 A forward surge current (8.3 ms half-sine). Electrical characteristics are specified at 25°C with 1 mA test current, and VBR exhibits +0.106 %/°C temperature coefficient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at 1 mA - defines reliable avalanche initiation window under production tolerance |
| VWM | 77.8 V - maximum continuous DC or RMS voltage the device blocks without significant leakage |
| VC @ IPP | 125 V at 5.0 A - clamping voltage during 10/1000 µs surge, limiting downstream component stress |
| PPK | 600 W - peak non-repetitive surge power handling capability per standard waveform |
| IR @ VWM | <1 µA - ensures minimal standby power loss and signal integrity in high-impedance circuits |
| TJMAX | +175°C - supports operation in under-hood automotive and high-temperature industrial environments |
| Package | DO-204AC (DO-15) - industry-standard axial leaded package with tin-plated leads, UL 94V-0 molding |
Pinout & Package
Package: DO-204AC (DO-15), axial-leaded, cathode-indicated by band marking. Leads are pure tin-plated and solderable per J-STD-002. Weight ≈ 0.400 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to circuit ground or return path; forms current sink during transient clamp |
| Cathode | High-side connection point | Connected to protected line (e.g., 24 V rail); polarity-sensitive - reverse connection disables protection |
Key Features
| Feature | Design Value |
|---|---|
| 600 W surge rating (10/1000 µs) | Enables robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 3 surges |
| Clamping voltage ≤125 V at 5.0 A | Limits voltage excursion on 24–48 V systems to safe levels for 3.3 V/5 V logic and MCU I/O |
| Response time <1.0 ps (0 V → VBR) | Engages before most ESD or lightning-induced transients fully develop, minimizing energy delivery |
| AEC-Q101 qualified (P6KE91AH variant) | Validated for automotive use including engine control, lighting, and body modules per stress test requirements |
| UL Recognized (E326243) & RoHS/halogen-free | Meets safety compliance and environmental mandates for global OEM and industrial deployments |
Applications
| Automotive Power Rail Protection | Industrial DC Power Input Stage |
|---|---|
|
Use Scenario: Protecting 24 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Primary shunt clamp placed between power rail and chassis ground, activated within picoseconds upon overvoltage detection. Use Value: Limits peak voltage to ≤125 V, preventing damage to 36 V-rated DC-DC converters and CAN transceivers downstream. |
Use Scenario: Safeguarding programmable logic controller (PLC) 24 V DC inputs against field-wiring induced surges. IC Role / Device Role / Timing Role: Standoff protector mounted directly at terminal block entry, absorbing energy before it reaches isolation barriers or microcontrollers. Use Value: Withstands repeated 600 W surges while maintaining <1 µA leakage, ensuring long-term reliability in dusty, humid factory environments. |
| LED Driver Overvoltage Clamp | RS-485 Transceiver Line Protection |
|
Use Scenario: Preventing catastrophic failure of constant-current LED drivers due to inductive kickback from relay switching. IC Role / Device Role / Timing Role: Unidirectional TVS connected anode-to-ground, cathode-to-driver output, clamping negative-going transients. Use Value: Fast 1.0 ps turn-on prevents voltage overshoot beyond 125 V, preserving MOSFET gate oxide integrity and driver IC latch-up immunity. |
Use Scenario: Shielding RS-485 transceivers (e.g., MAX1487) from EFT bursts and cable discharge events in building automation networks. IC Role / Device Role / Timing Role: Bidirectional protection not applicable - P6KE91A used in unidirectional configuration on VCC rail feeding transceiver, not data lines. Use Value: Clamps 5.0 A surges to 125 V, preventing internal LDO overvoltage and enabling continued communication during transient events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ90A | Same DO-214AC (SMA) package; 90 V nominal, 129 V clamping at 4.8 A; 400 W rating | Lower power rating and higher clamping voltage limit suitability to lower-energy interfaces (e.g., sensor I/O) | Select when space-constrained PCB layout favors surface-mount and surge energy is ≤400 W |
| ON Semiconductor 1.5KE91A | Same DO-204AC (DO-15) package; identical 91 V nominal, 125 V clamping at 5.0 A; 1500 W rating | Higher surge capacity enables single-device coverage for both ISO 7637-2 Pulse 5a and IEC 61000-4-5 Level 4 | Choose when system-level surge testing requires ≥1500 W headroom or legacy 1.5KE footprint compatibility is mandatory |
Compared with P6KE91A, SMAJ90A offers SMT compatibility but reduced surge margin, while 1.5KE91A provides triple the peak power rating in the same through-hole form factor - making it suitable for higher-stress automotive and industrial deployments where margin is critical.
Availability
P6KE91A is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC power inputs, LED driver protection circuits, and RS-485 power rail stabilization requiring stable component supply and full traceability.
Supply support for P6KE91A 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving automotive, industrial, and consumer markets since 1979.
The P6KE series belongs to TSC's high-reliability TVS portfolio, engineered specifically for cost-effective, high-volume transient protection in automotive power distribution and industrial control systems where AEC-Q101 compliance and UL recognition are mandatory.
FAQ
What is the clamping voltage of the P6KE91A under standard surge conditions?
The P6KE91A clamps to a maximum of 125 V when subjected to a 10/1000 µs waveform with a peak pulse current of 5.0 A. This value is measured per ANSI/IEEE C62.35 and confirmed in the official TSC datasheet revision P2203. The clamping performance ensures downstream components on 24 V or 48 V systems remain within safe operating voltage limits during transient events.
Is the P6KE91A suitable for bidirectional transient protection?
No, the P6KE91A is a unidirectional TVS diode and must be installed with correct polarity - cathode toward the protected line, anode to ground. For bidirectional protection, TSC offers the P6KE91CA variant. Using P6KE91A in reverse-biased configuration will not provide symmetrical clamping and may fail catastrophically under negative transients.
Does the P6KE91A meet automotive qualification standards?
The base P6KE91A is not AEC-Q101 qualified; however, the P6KE91AH variant (with "H" suffix) is fully AEC-Q101 certified per the ordering code table in the TSC datasheet. Engineers designing for automotive applications must specify P6KE91AH to ensure compliance with stress tests including temperature cycling, humidity bias HAST, and mechanical shock.
What is the maximum steady-state power dissipation for the P6KE91A?
The P6KE91A has a steady-state power dissipation (PD) of 5 W at ambient temperature (TA) = 75°C, measured with 9.5 mm lead lengths mounted on 5 × 5 mm copper pads per terminal. Derating is required above 75°C per Fig.2 in the datasheet, reaching zero dissipation at 175°C junction temperature.
How does the P6KE91A compare to the 1.5KE91A in terms of physical compatibility?
The P6KE91A and 1.5KE91A share identical DO-204AC (DO-15) packaging, pinout, and mechanical dimensions, enabling direct PCB footprint reuse. However, the 1.5KE91A is rated for 1500 W peak pulse power versus 600 W for P6KE91A - meaning the latter cannot substitute into designs originally validated for 1.5KE91A without retesting surge margin.
P6KE91A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- -
- 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):
- 4.8A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-15
P6KE91A FAQ
1.How can I place an order for P6KE91A through Aetrix?
Please submit a Request for Quotation (RFQ) for P6KE91A 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 P6KE91A reliable?
The price and inventory of P6KE91A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6KE91A is usually 5 days.
3.What payment methods are accepted for P6KE91A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6KE91A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6KE91A?
P6KE91A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6KE91A 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 P6KE91A?
For technical support, including P6KE91A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6KE91A requirements.
6.How does Aetrix verify that P6KE91A is sourced from the original manufacturer or authorized distributors?
All P6KE91A 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 P6KE91A meets industry standards.
7.What is the process for return or replacement of P6KE91A?
All P6KE91A units undergo pre-shipment inspection (PSI). If there is an issue with P6KE91A, 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 P6KE91A part is unused and in its original packaging.
Return procedure for P6KE91A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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