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Taiwan Semiconductor Corporation P6KE51
- Part No.:
- P6KE51
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
P6KE51.pdf
- Description:
- 600W, 51V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,346
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Product details
Overview
P6KE51 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 51V nominal breakdown voltage (45.9–56.1V), 41.3V stand-off voltage, 73.5V maximum clamping voltage at 8.5A peak surge current, and low dynamic impedance for fast response to ESD and lightning-induced transients - deployed in automotive body control modules and industrial PLC I/O protection.
For engineers reviewing the P6KE51 datasheet, P6KE51 pinout, P6KE51 application, or P6KE51 equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD, surge current capability under 10/1000μs waveform, junction temperature derating above 25°C, and DO-204AC (DO-15) package compatibility with manual or wave-solder assembly processes.
Technical Context
The P6KE51 operates as a silicon avalanche diode with unidirectional polarity, triggered when reverse voltage exceeds its specified breakdown range (45.9–56.1V at 1mA test current). Its clamping action limits transient energy by shunting surge current to ground while maintaining <73.5V across the protected node during a 10/1000μs 8.5A pulse.
Thermal performance is defined by a 175°C maximum junction temperature and 5W steady-state power dissipation at 75°C ambient on 5×5 mm copper pads. The device exhibits a +0.102%/°C temperature coefficient of VBR, requiring design margining for high-temperature operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W at 10/1000μs waveform - defines maximum single-event surge energy absorption without failure |
| Stand-Off Voltage VWM | 41.3V - maximum continuous reverse voltage before leakage exceeds 1μA; sets upper limit for normal operating rail voltage |
| Breakdown Voltage VBR | 45.9–56.1V at 1mA - verified avalanche initiation range; used to select margin above system VDD |
| Clamping Voltage VC | 73.5V at 8.5A IPP - actual voltage seen by protected circuit during worst-case surge; must be below IC absolute max rating |
| Junction Temperature | -55°C to +175°C - enables deployment in under-hood automotive and industrial environments without thermal shutdown |
| Package | DO-204AC (DO-15) - axial-leaded through-hole package with tin-plated leads compliant to J-STD-002 solderability |
| Leakage Current | <1μA at 41.3V - ensures minimal standby power loss and no false triggering on stable DC rails |
Pinout & Package
DO-204AC (DO-15) package: axial-leaded, molded epoxy case with cathode band marking for unidirectional polarity. Leads are pure tin-plated, RoHS-compliant, and meet JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Connected to protected circuit ground or low-side reference | Completes conduction path during reverse-biased surge event; must be routed with low-inductance ground plane |
| Cathode | Connected to protected line (e.g., 48V supply rail or CAN_H) | Receives transient voltage; marked by band on body; determines directionality of clamping action |
Key Features
| Feature | Design Value |
|---|---|
| 600W surge rating | Supports IEC 61000-4-5 Level 4 (4kV) surge immunity testing on 48V industrial buses without external series impedance |
| Fast response time | Sub-nanosecond turn-on (<1ps from 0V to VBR) ensures clamping initiates before sensitive ICs experience overstress |
| Low dynamic impedance | Enables tight clamping voltage window (VC – VBR = ~27.5V), minimizing voltage overshoot during high-di/dt events |
| AEC-Q101 qualified option | P6KE51H variant available for automotive applications requiring stress-tested reliability per JESD22-A108 |
| UL 94V-0 molding compound | Prevents flame propagation in enclosure-mounted protection circuits meeting UL 60950-1 and UL 62368-1 |
Applications
| Automotive Body Control Module (BCM) | Industrial 24V/48V PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting microcontroller GPIOs and LIN bus transceivers from load dump and alternator ripple in vehicle door modules. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12V supply rail and LIN signal line, activated within 1ps of transient onset. Use Value: Limits voltage to ≤73.5V during 10/1000μs surges up to 8.5A, preventing latch-up or gate oxide damage in 3.3V/5V logic interfaces. |
Use Scenario: Safeguarding analog input channels and relay driver outputs in programmable logic controllers exposed to inductive kickback from solenoids and motors. IC Role / Device Role / Timing Role: Unidirectional TVS placed between field wiring and isolation barrier, clamping transients before they reach signal conditioning ICs. Use Value: Withstands repetitive 600W surges while maintaining <1μA leakage at 41.3V, ensuring measurement accuracy and long-term reliability in harsh factory environments. |
| LED Streetlight Driver Input Stage | Telecom Power Supply Surge Protection |
|
Use Scenario: Suppressing lightning-induced surges on AC/DC front-end inputs of outdoor LED drivers subjected to direct lightning coupling via long feeder cables. IC Role / Device Role / Timing Role: First-line defense in series with MOV-based secondary protection, absorbing initial high-di/dt energy before slower components respond. Use Value: Clamps 10/1000μs surges to 73.5V at 8.5A, reducing stress on downstream bridge rectifiers and bulk capacitors rated for 100V DC. |
Use Scenario: Protecting -48V telecom power distribution boards from EFT bursts and accidental battery reversal during field maintenance. IC Role / Device Role / Timing Role: Unidirectional TVS on -48V return path, referenced to chassis ground to shunt common-mode transients. Use Value: Maintains <1μA leakage at 41.3V standoff, eliminating standby current penalty while delivering 600W pulse handling for GR-1089-CORE compliance. |
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 nominal, 73.5V clamping at 8.5A; 400W rating vs. P6KE51's 600W | Lower surge rating suits lower-energy ESD-only scenarios; not recommended for IEC 61000-4-5 Level 4 | Select SMAJ51A only if board space constraints require surface-mount and surge requirements are ≤400W |
| ON Semiconductor 1.5KE51A | Same DO-204AC (DO-15) package; identical 51V nominal, 73.5V clamping, 600W rating; AEC-Q101 not offered | Valid for industrial/commercial use but lacks automotive qualification path | Choose 1.5KE51A for cost-sensitive non-automotive designs where AEC-Q101 is not mandated |
Compared with SMAJ51A and 1.5KE51A, the P6KE51 provides identical clamping performance in the same through-hole package while offering an AEC-Q101-qualified variant (P6KE51H) - making it the preferred choice for automotive-grade designs requiring validated reliability and full 600W surge capability.
Availability
P6KE51 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O protection, and outdoor LED driver designs requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for P6KE51 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, and rectifiers with global ISO/TS 16949 and IATF 16949 certification.
The P6KE series was developed for robust, cost-effective overvoltage protection in automotive, industrial, and lighting systems - emphasizing high surge capability, tight parameter distribution, and AEC-Q101 qualification readiness.
FAQ
What is the maximum clamping voltage of the P6KE51 under standard test conditions?
The P6KE51 has a maximum clamping voltage (VC) of 73.5V at 8.5A peak pulse current (IPP) using the 10/1000μs waveform. This value is measured per ANSI/IEEE C62.35 and represents the highest voltage imposed on the protected circuit during a standardized surge event - critical for ensuring compatibility with downstream ICs rated for ≤75V absolute maximum input.
Is the P6KE51 suitable for bidirectional transient protection?
No, the P6KE51 is a unidirectional TVS diode intended for DC rail protection with defined polarity (cathode marked). For bidirectional applications such as AC lines or differential buses like RS-485, the P6KE51A variant or dedicated bidirectional types like P6KE51CA must be used - the P6KE51 itself conducts only in reverse breakdown and blocks forward current beyond its 100A surge rating.
What is the thermal derating behavior of the P6KE51 above 25°C ambient?
The P6KE51's peak pulse power rating decreases linearly above 25°C ambient per Figure 2 in the datasheet, reaching ~50% of 600W (i.e., 300W) at 75°C and zero at 175°C junction temperature. Its steady-state power dissipation is rated at 5W at 75°C on 5×5 mm copper pads - requiring thermal pad design and airflow consideration in enclosed enclosures.
Does the P6KE51 meet automotive qualification standards?
The base P6KE51 is not AEC-Q101 qualified, but the P6KE51H variant - identified by the "H" suffix in the ordering code - is fully AEC-Q101 qualified per stress tests including HTOL, TCT, and ESD. Designers targeting automotive applications must specify P6KE51H to ensure compliance with automotive reliability requirements.
How does the P6KE51 compare to the 1.5KE51A in terms of electrical performance?
The P6KE51 and ON Semiconductor 1.5KE51A share identical key parameters: 51V nominal voltage, 45.9–56.1V VBR, 41.3V VWM, 73.5V VC at 8.5A, and 600W peak power. Both use DO-204AC (DO-15) packaging. The primary distinction is that P6KE51 offers an AEC-Q101-qualified H-suffix version, whereas 1.5KE51A does not - making P6KE51 the sole choice for automotive-qualified designs needing this exact performance.
P6KE51 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:
- 1
- Bidirectional Channels:
- -
- 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)
P6KE51 FAQ
1.How can I place an order for P6KE51 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6KE51 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 P6KE51 reliable?
The price and inventory of P6KE51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6KE51 is usually 5 days.
3.What payment methods are accepted for P6KE51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6KE51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6KE51?
P6KE51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6KE51 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 P6KE51?
For technical support, including P6KE51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6KE51 requirements.
6.How does Aetrix verify that P6KE51 is sourced from the original manufacturer or authorized distributors?
All P6KE51 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 P6KE51 meets industry standards.
7.What is the process for return or replacement of P6KE51?
All P6KE51 units undergo pre-shipment inspection (PSI). If there is an issue with P6KE51, 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 P6KE51 part is unused and in its original packaging.
Return procedure for P6KE51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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