My Inquiry
My Account
Taiwan Semiconductor Corporation P6KE51A
;;2.jpg)
- Part No.:
- P6KE51A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
P6KE51A.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO15
- Quantity:
- Payment:
- Shipping:
Inventory:3,288
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P6KE51A from Taiwan Semiconductor is a unidirectional 600W transient voltage suppressor (TVS) diode designed for primary-side overvoltage clamping in DC power rails and signal lines. It features a 51V nominal breakdown voltage (48.5–53.6V), 43.6V stand-off voltage, 70.1V maximum clamping voltage at 8.9A peak surge current, and low dynamic impedance for fast transient suppression in automotive and industrial electronics.
For engineers reviewing the P6KE51A datasheet, P6KE51A pinout, P6KE51A application, or P6KE51A equivalent, key selection criteria include clamping performance under 10/1000μs surges, junction temperature derating above 25°C, unidirectional polarity marking, DO-15 mechanical compatibility, and AEC-Q101 qualification status for automotive-grade reliability validation.
Technical Context
The P6KE51A operates as a silicon avalanche diode with unidirectional polarity, activated when reverse voltage exceeds its specified VBR range. Its clamping action limits transient energy to protect downstream ICs by diverting surge current to ground while maintaining <70.1V across the protected node during a 10/1000μs waveform.
It exhibits a typical reverse leakage current of <1μA at 43.6V, a temperature coefficient of VBR at 0.102%/°C, and a junction-to-ambient thermal resistance optimized for DO-15 package mounting on 5×5 mm copper pads - enabling stable operation up to TJ = 175°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 48.5 V / 53.6 V - ensures reliable avalanche conduction onset within defined tolerance at 1 mA test current |
| VWM | 43.6 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPP | 70.1 V at 8.9 A - clamping voltage limiting stress on protected circuit during worst-case 10/1000μs surge |
| PPK | 600 W - non-repetitive peak pulse power handling capability per standard 10/1000μs waveform |
| IR @ VWM | <1 μA - minimal standby power loss and negligible loading on sensitive high-impedance nodes |
| TJ max | 175 °C - enables use in under-hood automotive environments and high-temperature industrial enclosures |
| Package | DO-204AC (DO-15) - industry-standard axial leaded package with tin-plated leads compliant to J-STD-002 |
Pinout & Package
DO-204AC (DO-15) package with axial leads: cathode indicated by band-marked end; anode is unmarked lead. Designed for through-hole mounting with 9.5 mm lead length and 5×5 mm copper pad thermal relief.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to system ground or low-impedance return path to shunt surge energy away from protected IC |
| Anode (unmarked end) | Protected line input | Connected to power rail or signal line requiring overvoltage protection; reverse-biased during normal operation |
Key Features
| Feature | Design Value |
|---|---|
| 600W surge rating (10/1000μs) | Enables robust protection against IEC 61000-4-5 Level 4 surges without degradation in single-event testing |
| Clamping voltage ≤70.1V | Guarantees safe voltage margin below 75V absolute maximum ratings of common 5V/12V/24V logic and power ICs |
| Fast response time <1.0 ps | Activates prior to most ESD events (IEC 61000-4-2) and fast transients, preventing latch-up or gate oxide damage |
| AEC-Q101 qualified (P6KE51AH variant) | Validated for automotive applications including engine control units, body electronics, and infotainment power supplies |
| RoHS & halogen-free | Complies with IPC/JEDEC J-STD-609A Class 1 and IEC 61249-2-21 for green manufacturing and end-of-life processing |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12V battery line in vehicle ECUs exposed to load dump (ISO 16750-2) and jump-start transients. IC Role / Device Role: Primary clamping device placed between battery feed and DC-DC converter input. Use Value: Limits voltage to ≤70.1V during 600W surges, preventing damage to 75V-rated buck controllers and LDOs. | Use Scenario: 24V analog sensor supply line in PLC I/O modules subject to inductive switching noise. IC Role / Device Role: Unidirectional TVS placed across sensor VSUPPLY and GND to clamp flyback spikes. Use Value: Suppresses >100V transients down to safe levels within nanoseconds, preserving ADC reference stability and amplifier integrity. |
| LED Driver Overvoltage Clamp | RS-485 Transceiver Line Protection |
Use Scenario: Constant-current LED driver output subjected to hot-swap and cable discharge events. IC Role / Device Role: TVS connected anode-to-cathode across driver output terminals to absorb reverse-energy surges. Use Value: Clamps induced voltages before they exceed 70.1V, avoiding catastrophic failure of MOSFET switches and current-sense resistors. | Use Scenario: RS-485 bus lines in factory automation systems exposed to EFT (IEC 61000-4-4) and lightning-induced surges. IC Role / Device Role: Discrete TVS pair (one per line) referenced to ground, protecting transceiver I/O pins. Use Value: Maintains signal integrity by limiting differential and common-mode transients to sub-75V levels, ensuring no receiver latch-up or driver destruction. |
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, 70.1V clamping, but rated for 400W (not 600W) | Lower surge rating limits use in high-energy automotive load dump scenarios | Select P6KE51A where 600W IEC 61000-4-5 compliance is mandatory; choose SMAJ51A only for space-constrained PCBs accepting reduced surge margin |
| ON Semiconductor 1.5KE51A | Same DO-201AD (DO-27) package; identical 51V/70.1V specs but rated for 1500W peak power | Higher surge capacity allows extended duty cycle or repeated surge exposure without degradation | Choose 1.5KE51A for mission-critical industrial controls needing >1000W headroom; retain P6KE51A for cost-sensitive, volume automotive designs with validated 600W margin |
Compared with SMAJ51A and 1.5KE51A, the P6KE51A delivers optimal balance of proven 600W surge capability, DO-15 mechanical compatibility, and AEC-Q101 qualification - making it the preferred choice for cost-effective, high-volume automotive and industrial power rail protection where full 1500W headroom is unnecessary.
Availability
P6KE51A is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, LED driver circuits, and RS-485 communication lines requiring stable component supply and long-term lifecycle support.
Supply support for P6KE51A 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 for automotive, industrial, and consumer markets.
The P6KE series belongs to TSC's high-reliability transient suppression product line, engineered specifically for robust overvoltage protection in harsh environments - emphasizing low clamping voltage, tight VBR tolerance, and AEC-Q101 qualification for automotive electronics.
FAQ
What is the clamping voltage of P6KE51A and how is it measured?
The P6KE51A has a maximum clamping voltage (VC) of 70.1 V at 8.9 A peak pulse current (IPP), tested using the standardized 10/1000 μs double-exponential surge waveform per IEC 61000-4-5. This value represents the upper limit of voltage seen across the device during worst-case transient events, ensuring downstream components remain within safe operating limits. The P6KE51A maintains this clamping performance consistently across its rated junction temperature range.
Is P6KE51A suitable for automotive applications?
Yes - the P6KE51A is qualified to AEC-Q101 when ordered as P6KE51AH (H-suffix variant), confirming reliability for automotive under-hood and cabin electronics. While the base P6KE51A meets all electrical and thermal specifications required for automotive use, formal qualification requires the H-suffix part. Engineers designing to ISO 16750-2 load dump or IEC 61000-4-5 surge standards should specify P6KE51AH for certified compliance.
What is the difference between P6KE51A and P6KE51?
The P6KE51A offers tighter breakdown voltage tolerance (48.5–53.6 V) versus P6KE51 (45.9–56.1 V), resulting in more predictable clamping onset and reduced variation in system-level surge response. Both share identical package (DO-15), power rating (600W), and thermal limits, but the 'A' suffix indicates enhanced VBR uniformity - critical for designs requiring precise overvoltage threshold control and consistent protection behavior across production batches.
Can P6KE51A be used in bidirectional configurations?
No - the P6KE51A is a unidirectional TVS diode, intended for DC rail protection with defined polarity (cathode to ground). For bidirectional protection, such as AC lines or differential data buses, engineers must select the CA-suffixed variant (e.g., P6KE51CA) or a dedicated bidirectional TVS. Using P6KE51A in reverse-biased forward conduction risks permanent damage due to lack of symmetrical avalanche structure.
What is the maximum junction temperature and thermal derating behavior of P6KE51A?
The P6KE51A supports a maximum junction temperature (TJ) of 175°C and follows a linear derating curve starting at 25°C ambient: peak pulse power decreases by ~0.6% per °C above 25°C, reaching zero at ~175°C. Derating is based on Fig.2 in the official datasheet and assumes mounting on 5×5 mm copper pads per terminal. This enables reliable operation in high-temperature enclosures without active cooling when layout guidelines are followed.
P6KE51A 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):
- 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
P6KE51A FAQ
1.How can I place an order for P6KE51A through Aetrix?
Please submit a Request for Quotation (RFQ) for P6KE51A 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 P6KE51A reliable?
The price and inventory of P6KE51A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6KE51A is usually 5 days.
3.What payment methods are accepted for P6KE51A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6KE51A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6KE51A?
P6KE51A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6KE51A 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 P6KE51A?
For technical support, including P6KE51A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6KE51A requirements.
6.How does Aetrix verify that P6KE51A is sourced from the original manufacturer or authorized distributors?
All P6KE51A 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 P6KE51A meets industry standards.
7.What is the process for return or replacement of P6KE51A?
All P6KE51A units undergo pre-shipment inspection (PSI). If there is an issue with P6KE51A, 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 P6KE51A part is unused and in its original packaging.
Return procedure for P6KE51A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6KE51A Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
