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Taiwan Semiconductor Corporation P6KE51CA
- Part No.:
- P6KE51CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
P6KE51CA.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO15
- Quantity:
- Payment:
- Shipping:
Inventory:3,490
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Product details
Overview
P6KE51CA from Taiwan Semiconductor is a bidirectional 600W transient voltage suppressor (TVS) diode designed for robust overvoltage protection in DC power rails and signal lines. It features a nominal breakdown voltage of 51 V, clamps transients to ≤73.5 V at 8.5 A peak surge current, and delivers fast response (<5 ns) with low dynamic impedance. It is widely deployed in automotive body electronics, industrial PLC I/O modules, and AC/DC adapter input stages.
For engineers reviewing the P6KE51CA datasheet, P6KE51CA pinout, P6KE51CA application, or P6KE51CA equivalent, key selection criteria include its bidirectional configuration, DO-15 package compatibility, 51 V standoff capability, and AEC-Q101 qualification for automotive-grade reliability - all critical for ESD and EFT immunity design in harsh environments.
Technical Context
The P6KE51CA operates as a silicon avalanche diode with symmetrical bidirectional clamping behavior, enabling protection against both positive and negative polarity transients without external polarity management. Its 10/1000 µs surge rating of 600 W and maximum clamping voltage of 73.5 V at 8.5 A define its energy-handling envelope under standardized lightning-surge stress.
Thermal performance is governed by a 175 °C maximum junction temperature and derating per Fig.2 above 25 °C ambient; electrical stability is ensured by <1 µA reverse leakage at 41.3 V standoff and a 0.102 %/°C VBR temperature coefficient - critical for predictable clamping across operating temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 600 W - sustains single high-energy surges per IEC 61000-4-5 Level 4 without failure |
| Standoff Voltage (VWM) | 41.3 V - maximum continuous DC or RMS voltage the device blocks before conduction begins |
| Breakdown Voltage (VBR, min/max) | 45.9 V / 56.1 V at 1 mA - defines the guaranteed voltage range where avalanche conduction initiates |
| Clamping Voltage (VC @ IPP) | 73.5 V at 8.5 A - maximum voltage seen by protected circuit during full-rated surge event |
| Junction Temperature Range | –55 °C to +175 °C - supports operation in under-hood automotive and industrial environments |
| Package | DO-204AC (DO-15) - industry-standard axial leaded package with 0.400 g mass and UL 94V-0 molding compound |
| AEC-Q101 Qualified | Yes - validated for automotive applications per stress test requirements including temperature cycling and HTRB |
Pinout & Package
DO-204AC (DO-15) axial-leaded package with cathode band marking for unidirectional variants; P6KE51CA is bidirectional and marked without polarity band. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | No functional polarity - either terminal serves as anode or cathode depending on transient polarity |
| Lead 1 / Lead 2 | Current path interface | Direct connection to PCB traces; requires ≥5 × 5 mm copper pads per lead for full 600 W dissipation at 75 °C |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity awareness |
| Fast response time | <5 ns turn-on from 0 V to VBR - limits voltage overshoot during nanosecond-scale ESD events |
| Low dynamic impedance | Ensures stable clamping voltage under varying surge currents, minimizing protected circuit stress |
| AEC-Q101 qualification | Validates reliability for automotive powertrain and chassis modules subject to extended thermal and mechanical stress |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive - suitable for green manufacturing and export compliance |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
|
Use Scenario: Protecting 12 V CAN bus termination resistors and microcontroller GPIOs from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed directly at connector entry point before ESD diode array and LDO regulator. Use Value: Limits transient voltage to ≤73.5 V, preventing latch-up or gate oxide damage in downstream 5 V logic ICs during 100 V/50 ms load dump events. |
Use Scenario: Safeguarding 24 V DC digital input channels from inductive kickback when switching solenoids or relays. IC Role / Device Role / Timing Role: Front-end TVS mounted inline with optocoupler input, absorbing >600 W surge energy before current-limiting resistor. Use Value: Clamps 24 V line spikes to safe levels within 5 ns, preserving optocoupler CTR stability and eliminating false triggering in noisy factory environments. |
| AC/DC Adapter Input Stage | LED Streetlight Driver EMI Filter |
|
Use Scenario: Suppressing differential-mode surges on primary-side rectified DC bus after bridge rectifier. IC Role / Device Role / Timing Role: Bidirectional shunt device across bulk capacitor, triggered only during overvoltage excursions exceeding 41.3 V. Use Value: Absorbs 600 W lightning-induced surges (10/1000 µs) without degradation, extending capacitor lifetime and avoiding fuse blowouts. |
Use Scenario: Protecting X/Y-capacitor-based EMI filter inputs from mains-borne transients in outdoor lighting. IC Role / Device Role / Timing Role: First-line defense across AC input terminals, diverting surge current away from MOVs and common-mode chokes. Use Value: Provides precise 41.3 V standoff and 73.5 V clamping - tighter tolerance than MOVs - reducing stress on downstream Y-capacitors rated for 250 V AC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51CA (Bourns) | Same 51 V bidirectional rating, but SMB package (surface-mount); 600 W rating at 10/1000 µs; lower clamping voltage (71.4 V @ 8.3 A) | Requires PCB rework for SMT layout; better thermal performance in compact designs but lacks axial lead mechanical robustness | Select SMBJ51CA when board space is constrained and automated assembly is preferred over through-hole mounting. |
| 1.5KE51CA (ON Semiconductor) | Same DO-15 package and 51 V rating; identical 600 W surge rating; slightly higher clamping voltage (74 V @ 8.5 A) and wider VBR tolerance (45.9–56.1 V vs. 45.9–56.1 V - same) | Drop-in replacement in legacy designs; minor clamping variation has negligible impact on protected 5 V/3.3 V logic | Choose 1.5KE51CA for second-source assurance in long-lifecycle industrial programs where Taiwan Semiconductor supply continuity is monitored. |
Compared with SMBJ51CA and 1.5KE51CA, the P6KE51CA offers identical electrical protection performance in the DO-15 through-hole format, with AEC-Q101 qualification providing verified automotive reliability - a decisive advantage over non-qualified alternatives in transportation and heavy equipment applications.
Availability
P6KE51CA is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O protection, and AC/DC adapter input stages requiring stable component supply and AEC-Q101 compliance.
Supply support for P6KE51CA 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 global automotive, industrial, and consumer markets since 1979.
The P6KE series belongs to TSC's high-reliability TVS portfolio, engineered specifically for demanding transient immunity in automotive and industrial power systems - emphasizing AEC-Q101 validation, tight parametric control, and robust packaging for long-term field operation.
FAQ
What is the standoff voltage rating of the P6KE51CA?
The P6KE51CA has a maximum working peak reverse voltage (VWM) of 41.3 V. This means it reliably blocks voltages up to 41.3 V in normal operation while remaining non-conductive. The device begins avalanche conduction only when transient voltages exceed its minimum breakdown voltage of 45.9 V, ensuring no interference with nominal 36–40 V system rails. This specification is confirmed in the Electrical Specifications table on page 2 of the P6KE series datasheet.
Is the P6KE51CA unidirectional or bidirectional?
The P6KE51CA is a bidirectional TVS diode, indicated by the "CA" suffix per TSC's ordering nomenclature. Unlike unidirectional "A"-suffixed parts, it provides symmetrical clamping for both positive and negative transients without polarity dependency. This makes the P6KE51CA ideal for protecting AC-coupled circuits, transformer-isolated interfaces, and floating bus lines where voltage polarity reversal is possible.
Does the P6KE51CA meet AEC-Q101 qualification?
Yes, the P6KE51CA is AEC-Q101 qualified, as explicitly stated in the FEATURES section of the datasheet. This qualification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling, and unbiased highly accelerated stress testing (uHAST), validating its suitability for automotive under-hood and chassis applications. The "H" suffix variant (e.g., P6KE51CAH) denotes enhanced screening, but standard P6KE51CA already meets full AEC-Q101 requirements.
What is the maximum clamping voltage of the P6KE51CA at rated surge current?
The P6KE51CA clamps to a maximum of 73.5 V when subjected to its rated peak pulse current of 8.5 A (10/1000 µs waveform). This clamping voltage is measured across the device terminals during surge conduction and represents the highest voltage the protected circuit will experience. It is specified in the Electrical Specifications table and forms the basis for selecting downstream components with appropriate voltage margins.
Can the P6KE51CA be used in place of the P6KE51A?
No - the P6KE51CA and P6KE51A are not interchangeable due to fundamental configuration differences. The "CA" suffix denotes bidirectional operation, while "A" indicates unidirectional. Substituting P6KE51CA for P6KE51A would eliminate polarity-sensitive protection and may fail to clamp negative transients in DC-coupled circuits. Always match suffixes: use P6KE51CA only where bidirectional clamping is required and designed into the schematic.
P6KE51CA 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 43.6V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 8.6A
- 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
P6KE51CA FAQ
1.How can I place an order for P6KE51CA through Aetrix?
Please submit a Request for Quotation (RFQ) for P6KE51CA 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 P6KE51CA reliable?
The price and inventory of P6KE51CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6KE51CA is usually 5 days.
3.What payment methods are accepted for P6KE51CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6KE51CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6KE51CA?
P6KE51CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6KE51CA 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 P6KE51CA?
For technical support, including P6KE51CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6KE51CA requirements.
6.How does Aetrix verify that P6KE51CA is sourced from the original manufacturer or authorized distributors?
All P6KE51CA 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 P6KE51CA meets industry standards.
7.What is the process for return or replacement of P6KE51CA?
All P6KE51CA units undergo pre-shipment inspection (PSI). If there is an issue with P6KE51CA, 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 P6KE51CA part is unused and in its original packaging.
Return procedure for P6KE51CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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