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Vishay General Semiconductor - Diodes Division P6KE51A-E3/73
- Part No.:
- P6KE51A-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
P6KE51A-E3/73.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,270
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Product details
Overview
P6KE51A-E3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-15 package, designed for primary-level overvoltage protection of sensitive electronics. It features a 48.5 V minimum breakdown voltage (VBR), 43.6 V maximum stand-off voltage (VWM), 70.1 V clamping voltage (VC) at 8.6 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive sensor signal lines, industrial I/O interfaces, and DC power rail protection.
For engineers reviewing the P6KE51A-E3/73 datasheet, P6KE51A-E3/73 pinout, P6KE51A-E3/73 application, or P6KE51A-E3/73 equivalent, this page delivers verified electrical parameters, thermal derating behavior, UL 497B recognition, AEC-Q101 qualification status, and real-world clamping performance under surge conditions - all critical for ESD/surge co-design and reliability validation.
Technical Context
The P6KE51A-E3/73 operates as a silicon avalanche diode with glass-passivated junction, enabling sub-nanosecond response to transients. Its unidirectional polarity uses a cathode band marking, and it exhibits 0.102 %/°C temperature coefficient of VBR, ensuring predictable voltage drift across -55 °C to +175 °C operating range.
Thermally, it delivers 20 °C/W junction-to-lead resistance and 75 °C/W junction-to-ambient resistance, supporting 5.0 W steady-state dissipation on infinite heatsink at TL = 75 °C. It withstands 100 A non-repetitive forward surge (8.3 ms half-sine) and maintains ≤1.0 μA reverse leakage at VWM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 48.5 V / 53.6 V at 1.0 mA test current - defines reliable avalanche initiation threshold under low-current stress |
| VWM | 43.6 V maximum - ensures no conduction during normal 42 V automotive or 36 V industrial DC operation |
| VC @ IPPM | 70.1 V at 8.6 A (10/1000 μs) - limits protected circuit voltage to safe margin below IC absolute max ratings |
| PPPM | 600 W peak pulse power - sustains high-energy lightning-induced surges per IEC 61000-4-5 Level 4 |
| IFSM | 100 A peak forward surge - survives inductive turn-off spikes without degradation |
| TJ max | +175 °C - enables under-hood automotive placement and high-temperature industrial environments |
| RθJL | 20 °C/W - supports direct PCB copper pour heatsinking for sustained transient duty cycles |
Pinout & Package
Package: DO-15 (DO-204AC), axial-leaded, molded epoxy case meeting UL 94 V-0 flammability rating. Matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. Cathode identified by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction or reverse clamping | Connected to protected line (e.g., CAN_H, RS-485 A) when used in unidirectional configuration |
| Cathode | Current exit terminal; marked with band | Connected to ground or lower-potential reference plane - determines clamping polarity and directionality |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Enables stable, repeatable avalanche characteristics over 1000+ surge events without parameter drift |
| AEC-Q101 qualified (HE3 variant); E3 is commercial grade | P6KE51A-E3/73 meets automotive component stress testing for temperature cycling, humidity, and mechanical shock |
| UL 497B recognized (QVGQ2 file E136766) | Validates suitability for telecom and industrial communication port protection per safety-critical standards |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns rise time), improving clamping fidelity |
| Solder dip rated 275 °C for 10 s | Supports wave soldering and reflow processes without delamination or junction damage |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting ABS wheel speed sensor output lines from load dump and ISO 7637-2 pulse 5a transients. IC Role / Device Role / Timing Role: Primary clamping device placed between sensor output and microcontroller input pin. Use Value: Limits voltage to ≤70.1 V during 100 V/500 ms load dump, preventing MCU I/O latch-up or oxide rupture. |
Use Scenario: Safeguarding RS-485 transceiver (e.g., SN65HVD230) bus pins against EFT bursts and cable discharge events. IC Role / Device Role / Timing Role: Line-side TVS connected between A/B differential pair and local ground. Use Value: Clamps 4 kV EFT pulses to <75 V within 1 ns, preserving signal integrity and avoiding receiver saturation. |
| DC Power Rail Protection | Consumer USB Port ESD |
Use Scenario: Shielding 24 V PLC I/O module power input from switching transients generated by relay coils or solenoids. IC Role / Device Role / Timing Role: Unidirectional TVS placed anode-to-rail, cathode-to-ground on main 24 V supply line. Use Value: Absorbs 600 W surges without failure, maintaining system uptime during factory floor inductive noise events. |
Use Scenario: Adding secondary-level ESD protection on USB VBUS line in smart home hubs before USB switch IC. IC Role / Device Role / Timing Role: Standoff-rated TVS (VWM = 43.6 V) placed upstream of 5 V LDO regulator. Use Value: Blocks 15 kV HBM discharges while remaining inactive during 5 V nominal operation due to 43.6 V VWM. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51A | DO-214AA package; 51 V VBR; 600 W PPPM; 10% tighter VBR tolerance (±5%) vs. ±10% for P6KE51A-E3/73 | Surface-mount footprint; higher board density but requires reflow-compatible layout and thermal relief design | Select SMBJ51A when space-constrained PCBs demand SMD mounting and tighter voltage tolerance is required for precision clamping. |
| 1.5KE51A | DO-201AD package; identical VBR/VC/PPPM; 1.5 kW peak power rating (vs. 600 W); larger body and higher thermal mass | Higher surge endurance for infrequent but extreme events (e.g., outdoor telecom cabinets); less suitable for compact consumer modules | Choose 1.5KE51A where legacy through-hole compatibility is needed and single-event surge energy exceeds 600 W capability. |
Compared with SMBJ51A and 1.5KE51A, the P6KE51A-E3/73 offers optimal balance of cost, proven DO-15 reliability, and AEC-Q101-qualified variants - making it preferred for mid-volume automotive and industrial designs requiring validated through-hole robustness without over-engineering.
Availability
P6KE51A-E3/73 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial RS-485 interface hardening, and DC power rail surge suppression requiring stable component supply across production lifecycles.
Supply support for P6KE51A-E3/73 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P6KE series belongs to Vishay's TRANSZORB® TVS family, engineered for cost-effective, high-surge-capability overvoltage protection in commercial and automotive-grade systems where fast response and repeatable clamping are essential.
FAQ
What is the clamping voltage of P6KE51A-E3/73 and how is it measured?
The P6KE51A-E3/73 has a maximum clamping voltage (VC) of 70.1 V, measured at 8.6 A peak pulse current using the standardized 10/1000 μs double-exponential waveform per IEC 61000-4-5. This value represents the upper voltage limit imposed on protected circuitry during worst-case surge events, and is confirmed in Vishay's datasheet Document Number 88369, page 2.
Is P6KE51A-E3/73 RoHS compliant and what does the "E3" suffix indicate?
Yes, P6KE51A-E3/73 is RoHS compliant. The "E3" suffix denotes Vishay's commercial-grade, matte tin-plated leads meeting J-STD-002 solderability requirements and JESD 201 Class 1A whisker resistance. It is not AEC-Q101 qualified - that designation requires the "HE3" suffix, as specified in the ordering information table on page 3 of datasheet 88369.
Can P6KE51A-E3/73 be used in bidirectional configurations?
No, P6KE51A-E3/73 is strictly unidirectional. Bidirectional variants use the "CA" suffix (e.g., P6KE51CA). The P6KE51A-E3/73 features a cathode band marking and conducts only in reverse breakdown - applying reverse polarity will cause forward conduction and potential failure. Always verify polarity during PCB layout.
What is the maximum operating temperature and thermal resistance of P6KE51A-E3/73?
The P6KE51A-E3/73 has a maximum junction temperature (TJ) of +175 °C and typical thermal resistance of 20 °C/W junction-to-lead (RθJL). Its junction-to-ambient RθJA is 75 °C/W - meaning effective heatsinking via PCB copper pour or lead-frame thermal paths is essential for sustained surge duty cycles above 1 Hz repetition rate.
Does P6KE51A-E3/73 meet any safety certifications for end-equipment compliance?
Yes, P6KE51A-E3/73 carries Underwriters Laboratories (UL) recognition under standard UL 497B for protectors, with file number E136766. This certification validates its use in telecom, industrial control, and automotive applications where safety agency approval is mandatory for system-level certification.
P6KE51A-E3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- 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:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
P6KE51A-E3/73 FAQ
1.How can I place an order for P6KE51A-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6KE51A-E3/73 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-E3/73 reliable?
The price and inventory of P6KE51A-E3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6KE51A-E3/73 is usually 5 days.
3.What payment methods are accepted for P6KE51A-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6KE51A-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6KE51A-E3/73?
P6KE51A-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6KE51A-E3/73 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-E3/73?
For technical support, including P6KE51A-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6KE51A-E3/73 requirements.
6.How does Aetrix verify that P6KE51A-E3/73 is sourced from the original manufacturer or authorized distributors?
All P6KE51A-E3/73 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-E3/73 meets industry standards.
7.What is the process for return or replacement of P6KE51A-E3/73?
All P6KE51A-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with P6KE51A-E3/73, 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-E3/73 part is unused and in its original packaging.
Return procedure for P6KE51A-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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