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Taiwan Semiconductor Corporation P6KE51C
- Part No.:
- P6KE51C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
P6KE51C.pdf
- Description:
- 600W, 51V, BIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,522
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Product details
Overview
P6KE51C from Taiwan Semiconductor is a unidirectional 600W transient voltage suppressor (TVS) diode designed for overvoltage protection in DC power rails and signal lines. It features a 51V nominal breakdown voltage (VBR = 45.9–56.1V), 41.3V stand-off voltage (VWM), clamps to ≤73.5V at 8.5A peak surge current, and uses a DO-204AC (DO-15) axial package - commonly deployed in automotive body electronics and industrial I/O interface protection.
For engineers reviewing the P6KE51C datasheet, P6KE51C pinout, P6KE51C application, or P6KE51C equivalent, key selection criteria include its unidirectional polarity, 10/1000μs surge rating, low dynamic impedance, sub-1ps response time from 0V to VBR, and AEC-Q101 qualification (H-suffix variant only).
Technical Context
The P6KE51C operates as a silicon avalanche diode with sharp reverse-breakdown characteristics, triggered when transient voltage exceeds its VBR threshold. Its unidirectional configuration provides forward conduction capability up to 100A IFSM while blocking reverse voltages up to 41.3V in normal operation.
It delivers 600W non-repetitive peak pulse power per 10/1000μs waveform, with thermal derating above 25°C ambient and a maximum junction temperature of +175°C. Clamping performance is specified at 8.5A IPP, yielding VC ≤ 73.5V - ensuring downstream ICs remain below absolute maximum ratings during ESD or inductive switching events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 41.3 V - Maximum continuous reverse working voltage before leakage rises significantly; sets safe operating margin below VBR. |
| VBR (min/max) | 45.9 V / 56.1 V - Breakdown occurs within this range at 1 mA test current; defines turn-on threshold tolerance. |
| VC @ IPP | ≤73.5 V @ 8.5 A - Clamped voltage during 10/1000μs surge; determines protected circuit's worst-case overvoltage exposure. |
| PPK | 600 W - Peak pulse power handling per standard 10/1000μs waveform; validates robustness against lightning or load dump transients. |
| IR @ VWM | ≤1 μA - Reverse leakage at rated stand-off voltage; ensures minimal power loss and signal integrity in high-impedance circuits. |
| TJ max | +175 °C - Maximum junction temperature; supports operation in under-hood automotive or high-temperature industrial environments. |
| Package | DO-204AC (DO-15) - Axial-leaded, through-hole package with 0.400g mass; compatible with legacy PCB assembly and manual repair. |
Pinout & Package
DO-204AC (DO-15) axial package with cathode band marking. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connects to lower-potential side (e.g., ground or return) in unidirectional TVS configuration. |
| Cathode | Reverse-biased protection node | Connected to protected line (e.g., 48V rail or CAN_H); conducts only during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional surge suppression | Enables integration into DC power rails where forward conduction (e.g., during load dump recovery) must be supported without damage. |
| Sub-1 ps response time (0 V → VBR) | Protects sensitive logic and analog inputs faster than most ESD events propagate - critical for USB, RS-485, and sensor interfaces. |
| AEC-Q101 qualified option (P6KE51CH) | Validated for automotive applications including body control modules and lighting drivers requiring reliability across -55°C to +175°C. |
| UL 94V-0 molding compound | Ensures flame-retardant housing meets safety standards for enclosed industrial equipment and EV charging infrastructure. |
| Low dynamic impedance | Maintains tight clamping voltage under high di/dt surges - reduces overshoot and improves protection margin for 3.3V/5V microcontrollers. |
Applications
| Automotive Body Electronics | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and door module MCUs from battery load dump and jump-start transients. IC Role / Device Role: Unidirectional TVS placed between LIN line and ground to clamp spikes up to ±100V. Use Value: Limits voltage seen by transceiver to ≤73.5V during 600W surges, preventing latch-up or gate oxide damage in 5V-tolerant receivers. | Use Scenario: Shielding 24V digital input channels in programmable logic controllers from inductive kickback of solenoid valves. IC Role / Device Role: P6KE51C installed across input terminals to shunt energy from 24V relay coils. Use Value: Clamps 10/1000μs transients to <74V, keeping input comparator and optocoupler within safe operating area despite 100V+ flyback spikes. |
| LED Driver Power Stage | DC Power Rail Surge Suppression |
Use Scenario: Safeguarding constant-current LED driver ICs in streetlight systems exposed to lightning-induced surges on 48V DC distribution lines. IC Role / Device Role: Mounted between 48V rail and chassis ground to absorb repetitive 600W pulses. Use Value: Withstands >1000 surges at 80% derated power (per Fig.2), extending system lifetime in outdoor deployments. | Use Scenario: Adding secondary overvoltage protection on the output of a 48V DC-DC converter feeding telecom base station backplane. IC Role / Device Role: P6KE51C used downstream of primary protection to catch fast-rising transients missed by slower MOVs. Use Value: Sub-1ps response captures nanosecond-scale ringing from MOSFET switching, reducing need for additional RC snubbers. |
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 SMAJ51A | Same DO-214AC (SMA) package; 51V VBR, 73.5V VC, but 400W PPK rating. | Suitable for space-constrained SMT layouts; lower surge capacity limits use in high-energy automotive load dump scenarios. | Select when board real estate is limited and peak surge energy is ≤400W. |
| Vishay 1.5KE51C | Same DO-204AC (DO-15) package; identical 51V rating, 600W rating, but higher VC (77V) and wider VBR tolerance (45.9–58.0V). | Acceptable where clamping voltage margin allows up to 77V; broader VBR may affect precision thresholding in low-voltage systems. | Choose for second-source availability with identical mounting and thermal profile. |
Compared with SMAJ51A and 1.5KE51C, the P6KE51C offers optimal balance of axial-package serviceability, 600W surge headroom, and tight 45.9–56.1V VBR window - making it preferred for repairable industrial controls and AEC-Q101-compliant automotive variants (P6KE51CH).
Availability
P6KE51C is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O protection, LED driver power stages, and DC power rail surge suppression requiring stable component supply across extended production lifecycles.
Supply support for P6KE51C 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 - serving automotive, industrial, and consumer markets since 1979.
The P6KE series was engineered for high-reliability transient suppression in harsh environments, with emphasis on AEC-Q101 compliance, UL recognition, and robust surge endurance across -55°C to +175°C operation.
FAQ
What is the polarity configuration of the P6KE51C?
The P6KE51C is a unidirectional TVS diode, meaning it conducts only in reverse bias during overvoltage events and allows forward current flow like a standard rectifier. Its cathode is marked with a band on the DO-204AC body. This configuration makes the P6KE51C suitable for DC power line protection where forward conduction (e.g., during load dump recovery) is required - unlike bidirectional variants such as P6KE51CA.
Does the P6KE51C meet AEC-Q101 reliability requirements?
The base P6KE51C is not AEC-Q101 qualified; however, the P6KE51CH variant - identifiable by the "H" suffix in the ordering code - is fully AEC-Q101 certified for automotive applications. The P6KE51CH undergoes stress testing across temperature cycling, humidity, and mechanical shock per AEC-Q101 Rev D, and is recommended for body electronics, lighting, and infotainment systems where automotive-grade reliability is mandated.
What is the maximum clamping voltage of the P6KE51C under surge conditions?
The P6KE51C has a maximum clamping voltage (VC) of 73.5 V when subjected to its rated peak pulse current of 8.5 A using the standard 10/1000 μs waveform. This value is measured at the device terminals and represents the upper limit of voltage imposed on the protected circuit during a full-power transient event - a critical parameter for ensuring downstream ICs remain within their absolute maximum voltage ratings.
How does the P6KE51C compare to the P6KE51A in terms of electrical performance?
The P6KE51C has a VBR range of 45.9–56.1 V at 1 mA, while the P6KE51A offers tighter tolerance: 48.5–53.6 V. Both share identical VWM (41.3 V), VC (73.5 V), and PPK (600 W). The P6KE51A's narrower breakdown window improves predictability in precision-clamp designs, whereas the P6KE51C provides broader margin for applications tolerant of VBR variation - both are valid choices depending on system-level voltage tolerance budgets.
Can the P6KE51C be used in bidirectional signal line protection?
No - the P6KE51C is strictly unidirectional and unsuitable for AC or bidirectional signal lines (e.g., RS-485, CAN, or USB D+/D−) without external circuitry. For such applications, the bidirectional P6KE51CA variant must be used instead. Using the P6KE51C on a bidirectional line risks forward conduction during normal signal swings and failure to clamp negative transients, potentially damaging connected transceivers or PHYs.
P6KE51C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- P6KE
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 41.3V
- Voltage - Breakdown (Min):
- 45.9V
- Voltage - Clamping (Max) @ Ipp:
- 73.5V
- Current - Peak Pulse (10/1000µs):
- 8.5A
- Power - Peak Pulse:
- 600W
- 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-204AC (DO-15)
P6KE51C FAQ
1.How can I place an order for P6KE51C through Aetrix?
Please submit a Request for Quotation (RFQ) for P6KE51C 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 P6KE51C reliable?
The price and inventory of P6KE51C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6KE51C is usually 5 days.
3.What payment methods are accepted for P6KE51C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6KE51C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6KE51C?
P6KE51C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6KE51C 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 P6KE51C?
For technical support, including P6KE51C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6KE51C requirements.
6.How does Aetrix verify that P6KE51C is sourced from the original manufacturer or authorized distributors?
All P6KE51C 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 P6KE51C meets industry standards.
7.What is the process for return or replacement of P6KE51C?
All P6KE51C units undergo pre-shipment inspection (PSI). If there is an issue with P6KE51C, 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 P6KE51C part is unused and in its original packaging.
Return procedure for P6KE51C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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