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Taiwan Semiconductor Corporation P4KE82AH
- Part No.:
- P4KE82AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE82AH.pdf
- Description:
- TVS DIODE 70.1VWM 113VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:9,604
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Product details
Overview
P4KE82AH from Taiwan Semiconductor is a unidirectional 400W 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 82 V, clamps transients to ≤118 V at 3.5 A peak pulse current, and delivers sub-nanosecond response (<1.0 ps from 0 V to VBR) - ideal for safeguarding automotive ECUs against ISO 7637-2 load dump and EFT bursts.
For engineers reviewing the P4KE82AH datasheet, P4KE82AH pinout, P4KE82AH application, or P4KE82AH equivalent, key selection criteria include its AEC-Q101 qualification, DO-41 package compatibility with high-reliability board layouts, 175 °C maximum junction temperature, and verified clamping performance under 10/1000 μs surge waveforms per IEC 61000-4-5.
Technical Context
The P4KE82AH operates as a silicon avalanche diode with unidirectional polarity, activated only during positive overvoltage events relative to cathode. Its low dynamic impedance ensures stable clamping across surge currents up to 3.5 A, while the 0.105 %/°C VBR temperature coefficient guarantees predictable voltage drift over automotive temperature ranges.
It meets UL 94V-0 flammability requirements in its DO-204AL molded case and supports soldering per J-STD-002 with pure tin-plated leads. The device is rated for non-repetitive 400 W peak pulse power at TA = 25 °C and derates linearly above that ambient per Fig.2 in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 66.4 V - Maximum continuous reverse operating voltage before leakage exceeds 1 μA; defines safe DC rail margin below clamping threshold |
| VBR @ IT = 1 mA | 73.8–90.2 V - Verified avalanche onset range; ensures reliable triggering within ±10% of nominal 82 V rating |
| VC @ IPPM = 3.5 A | 118 V - Clamped voltage during full 400 W 10/1000 μs surge; determines protected circuit's maximum transient exposure |
| IPPM | 3.5 A - Peak pulse current corresponding to 400 W rating; used to size series impedance for energy absorption |
| TJMAX | 175 °C - Maximum junction temperature; enables operation in under-hood automotive environments without thermal shutdown |
| Response Time | <1.0 ps - Time from 0 V to VBR; critical for suppressing fast ESD and EFT transients before IC damage occurs |
| Leakage @ VWM | <1 μA - Ultra-low reverse current minimizes standby power loss in always-on systems like CAN bus nodes |
Pinout & Package
Package: DO-204AL (DO-41), axial leaded, epoxy-molded case with cathode band marking. Dimensions comply with JEDEC DO-41 standard; weight ≈ 0.300 g. Leads are pure tin-plated and whisker-resistant per JESD201 Class 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side terminal | Connected to protected line (e.g., battery feed); conducts surge current toward cathode during overvoltage |
| Cathode | Ground/reference terminal | Connected to system ground or low-impedance return path; defines unidirectional conduction direction and clamping reference |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HAST, and mechanical shock - required for engine control, ADAS, and body electronics |
| 400 W peak pulse rating | Withstands single-event surges up to 400 W at 10/1000 μs per ANSI/IEEE C62.35 - sufficient for ISO 7637-2 Pulse 5a (load dump) |
| Clamping ratio VC/VBR ≈ 1.31 | Low ratio indicates high efficiency in diverting energy without excessive voltage overshoot - preserves downstream MOSFET gate oxide integrity |
| UL Recognized (E326243) | Meets UL 1449 Component Recognition requirements for transient protectors - simplifies end-product safety certification |
| RoHS & halogen-free | Complies with IEC 61249-2-21; eliminates brominated flame retardants and heavy metals for eco-compliant manufacturing and recycling |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: 12 V battery-fed microcontroller power input in engine control unit exposed to ISO 7637-2 load dump pulses. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of LDO regulator to limit input voltage to safe levels during 100 V/400 ms transients. Use Value: Clamps to ≤118 V at 3.5 A, preventing LDO thermal runaway and MCU brownout - validated under AEC-Q101 stress conditions. |
Use Scenario: 24 V analog sensor signal line (e.g., pressure transducer) in factory automation PLC I/O module. IC Role / Device Role / Timing Role: Signal-line TVS placed adjacent to connector to shunt EFT bursts (IEC 61000-4-4, ±2 kV) before reaching op-amp front-end. Use Value: Sub-1 ps response captures fast edges; <1 μA leakage avoids DC offset error in precision 4–20 mA loop receivers. |
| LED Driver Input Protection | DC-DC Converter Input Stage |
|
Use Scenario: Constant-current LED driver input in commercial lighting fixture powered from 48 V PoE++ or centralized supply. IC Role / Device Role / Timing Role: First-line defense against induced lightning surges on long cable runs; placed before input capacitor and controller IC. Use Value: 175 °C TJMAX supports enclosed fixture thermal profiles; DO-41 package allows manual rework and automated placement. |
Use Scenario: Input stage of isolated 48 V-to-12 V flyback converter in telecom power shelf. IC Role / Device Role / Timing Role: Transient suppressor between bulk capacitor and primary-side controller to prevent false triggering or latch-up during line surges. Use Value: Low VC/VBR ratio limits voltage stress on primary MOSFET drain; UL recognition supports EN 62368-1 compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ85A | Same DO-214AC (SMA) package; 85 V VBR min, 135 V VC @ 3.2 A; higher clamping voltage (+17 V vs. P4KE82AH) | Higher VC may exceed safe margin for 12 V logic interfaces; better suited for 24 V industrial rails | Select when SMA footprint is preferred and clamping margin allows ≥135 V exposure |
| ON Semiconductor 1.5KE82A | Same DO-204AL (DO-41) package; 82 V nominal, but 125 V VC @ 3.2 A; 1.5 kW rating implies larger junction area and slower response (~1 ns) | Higher VC and slower response reduce effectiveness for ESD/EFT; suitable only for slower load-dump-only use cases | Choose only if legacy 1.5KE footprint reuse is mandatory and clamping voltage tolerance permits +7 V overhead |
Compared with SMAJ85A and 1.5KE82A, the P4KE82AH offers the lowest clamping voltage (118 V) and fastest response (<1 ps) in a DO-41 package, making it optimal for space-constrained automotive and industrial designs where both speed and voltage margin are critical.
Availability
P4KE82AH is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface protection, and LED driver input staging requiring stable component supply and AEC-Q101 traceability.
Supply support for P4KE82AH 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 Taiwanese semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and thyristors since 1979.
The P4KE Series is part of TSC's AEC-Q101-qualified TVS portfolio engineered specifically for automotive and industrial overvoltage immunity - emphasizing robust surge handling, tight parametric tolerances, and long-term reliability in harsh environments.
FAQ
What is the polarity configuration of the P4KE82AH?
The P4KE82AH is a unidirectional TVS diode with clearly marked cathode band. It conducts only during positive overvoltage events on the anode relative to cathode, making it suitable for DC power rail protection where reverse voltage is not expected. This differs from bidirectional variants (e.g., P4KE82CA) which protect both polarities - the P4KE82AH must be oriented correctly in-circuit to function as intended.
Does the P4KE82AH meet automotive qualification standards?
Yes, the "H" suffix in P4KE82AH explicitly denotes AEC-Q101 qualification. This includes stress testing for temperature cycling, highly accelerated stress test (HAST), mechanical shock, and solder heat resistance - confirming suitability for under-hood and chassis-mounted automotive applications such as body control modules and infotainment power supplies.
What is the maximum clamping voltage of the P4KE82AH under surge conditions?
The P4KE82AH clamps to a maximum of 118 V when subjected to its rated peak pulse current of 3.5 A under the standard 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and forms the basis for designing downstream overvoltage margins - for example, ensuring protected ICs have absolute maximum ratings ≥125 V.
Can the P4KE82AH be used in AC line protection applications?
No, the P4KE82AH is unidirectional and not rated for continuous AC voltage reversal. Its VWM of 66.4 V applies only to DC or unidirectional signals. For AC line protection (e.g., 120 V RMS), a bidirectional TVS such as P4KE82CA or a dedicated AC-rated MOV would be required - using P4KE82AH on AC could result in catastrophic failure due to reverse conduction.
How does the P4KE82AH compare to the P4KE82A variant?
The P4KE82AH shares identical electrical specifications with P4KE82A (e.g., VBR 77.9–86.1 V, VC 113 V) but adds AEC-Q101 qualification, enhanced process controls, and extended temperature validation. The "H" suffix confirms automotive-grade screening - making P4KE82AH the appropriate choice for automotive designs where P4KE82A is limited to commercial/industrial use.
P4KE82AH 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):
- 70.1V
- Voltage - Breakdown (Min):
- 77.9V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 3.7A
- 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)
P4KE82AH FAQ
1.How can I place an order for P4KE82AH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE82AH 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 P4KE82AH reliable?
The price and inventory of P4KE82AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE82AH is usually 5 days.
3.What payment methods are accepted for P4KE82AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE82AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE82AH?
P4KE82AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE82AH 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 P4KE82AH?
For technical support, including P4KE82AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE82AH requirements.
6.How does Aetrix verify that P4KE82AH is sourced from the original manufacturer or authorized distributors?
All P4KE82AH 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 P4KE82AH meets industry standards.
7.What is the process for return or replacement of P4KE82AH?
All P4KE82AH units undergo pre-shipment inspection (PSI). If there is an issue with P4KE82AH, 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 P4KE82AH part is unused and in its original packaging.
Return procedure for P4KE82AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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