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Vishay General Semiconductor - Diodes Division P6KE51AHE3/54
- Part No.:
- P6KE51AHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
P6KE51AHE3/54.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,653
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Product details
Overview
P6KE51AHE3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-15 package, designed for primary-level overvoltage protection of DC power rails and signal lines. 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 ECUs, industrial sensor interfaces, and power supply input stages.
For engineers reviewing the P6KE51AHE3/54 datasheet, P6KE51AHE3/54 pinout, P6KE51AHE3/54 application, or P6KE51AHE3/54 equivalent, key selection criteria include clamping performance under 8.6 A surge, thermal resistance (RθJL = 20 °C/W), AEC-Q101 qualification, DO-15 mechanical compatibility, and unidirectional polarity marking for cathode identification.
Technical Context
This device operates as a silicon avalanche diode with glass-passivated junction, optimized for fast response (<1 ns) to transient overvoltages induced by inductive switching or ESD events. Its unidirectional configuration provides reverse-biased clamping only, requiring correct polarity installation relative to protected circuit ground.
Clamping behavior is defined by VC = 70.1 V at IPPM = 8.6 A (10/1000 μs), with low incremental surge resistance enabling effective voltage limiting during high-current transients. The 175 °C maximum junction temperature and 20 °C/W junction-to-lead thermal resistance support reliable operation under repeated surge conditions when mounted on PCB copper pours or heatsinked leads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43.6 V maximum - ensures stable blocking below system operating voltage without leakage-induced power loss |
| VBR min / max | 48.5 V / 53.6 V at 1.0 mA - defines precise avalanche initiation threshold for predictable turn-on timing |
| VC @ IPPM | 70.1 V at 8.6 A - limits transient voltage seen by downstream ICs to safe levels during 10/1000 μs surges |
| PPPM | 600 W - sustains single-event energy absorption without failure under standardized lightning/surge test waveforms |
| IFSM | 100 A at 8.3 ms half-sine - withstands repetitive inrush or fault currents without bond-wire fusing |
| TJ max | 175 °C - enables use in under-hood automotive environments and high-ambient industrial enclosures |
| RθJL | 20 °C/W - allows accurate thermal design when leads are soldered to copper planes for heat dissipation |
Pinout & Package
DO-15 (DO-204AC) molded epoxy package with matte tin-plated leads; cathode indicated by color band on body end. Leads conform to J-STD-002 and JESD 22-B102 solderability standards; RoHS compliant and AEC-Q101 qualified (HE3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to circuit ground or return path; carries full surge current during clamping |
| Cathode | High-side connection point | Marked with color band; connected to protected line; blocks normal operation voltage up to 43.6 V |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Enables stable avalanche characteristics and long-term reliability under thermal cycling and humidity stress |
| 600 W peak pulse power (10/1000 μs) | Provides robust protection against IEC 61000-4-5 Level 4 surges without derating in standard PCB layouts |
| AEC-Q101 qualification | Validates suitability for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage margin between breakdown and clamping, reducing stress on protected MOSFETs and ICs |
| Solder dip rated 275 °C for 10 s | Supports compatibility with lead-free reflow and wave soldering processes without parametric shift or delamination |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 48 V battery-supplied ECUs from load dump transients up to 120 V. IC Role / Device Role / Timing Role: Primary clamping element placed between power input and DC-DC converter input stage. Use Value: Limits voltage excursion to ≤70.1 V during 8.6 A surges, preventing damage to upstream regulators and microcontrollers. |
Use Scenario: Shielding 24 V analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Unidirectional TVS installed at connector entry point before signal conditioning amplifier. Use Value: Responds in <1 ns to clamp transients while maintaining <1 μA leakage at 43.6 V, preserving signal integrity. |
| Telecom Line Card Input | Consumer Power Adapter Input |
Use Scenario: Safeguarding PoE-powered Ethernet switch ports against induced surges from nearby AC wiring. IC Role / Device Role / Timing Role: Standoff-rated TVS on DC input rail upstream of isolation transformer and controller IC. Use Value: Absorbs 600 W pulses without degradation, meeting GR-1089-CORE Level 3 surge immunity requirements. |
Use Scenario: Overvoltage suppression on secondary-side 12 V output of wall adapters exposed to mains transients. IC Role / Device Role / Timing Role: Final-stage clamping device after rectification and filtering, before USB-PD controller. Use Value: Clamps to 70.1 V within nanoseconds, ensuring downstream USB interface ICs remain within absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51A | DO-214AA package; 51 V nominal VBR; same 600 W rating but lower RθJA (50 °C/W vs. 75 °C/W) | Better suited for surface-mount designs with limited board space; requires different footprint and reflow profile | Select SMBJ51A when automated SMT assembly is required and thermal management via PCB copper is prioritized. |
| 1.5KE51A | DO-201AD package; identical VBR, VC, and PPPM; higher IFSM (200 A) but no AEC-Q101 qualification | Used in non-automotive industrial power supplies where extended surge endurance is critical but automotive qualification is not mandated | Choose 1.5KE51A for cost-sensitive commercial power systems needing higher single-pulse surge margin without automotive compliance. |
Compared with SMBJ51A and 1.5KE51A, P6KE51AHE3/54 offers AEC-Q101 qualification and DO-15 through-hole compatibility - making it optimal for automotive and industrial designs requiring proven reliability, manual or wave-solder assembly, and traceable qualification evidence.
Availability
P6KE51AHE3/54 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and telecom line card surge immunity requiring stable component supply across multi-year production cycles.
Supply support for P6KE51AHE3/54 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, and protection devices with emphasis on reliability, automotive qualification, and application-specific performance.
The P6KE series targets cost-effective, high-energy transient suppression in space-constrained DC power and signal paths - engineered for rapid response, repeatable clamping, and long-term stability in harsh environments.
FAQ
What is the clamping voltage of P6KE51AHE3/54 and how is it measured?
The clamping voltage of P6KE51AHE3/54 is 70.1 V, measured at 8.6 A peak pulse current using a 10/1000 μs waveform per IEC 61000-4-5. This value represents the maximum voltage imposed on the protected circuit during a standardized surge event and is guaranteed across the full operating temperature range. P6KE51AHE3/54 maintains this clamping performance due to its low incremental surge resistance and stable avalanche junction.
Is P6KE51AHE3/54 suitable for automotive applications?
Yes, P6KE51AHE3/54 is AEC-Q101 qualified and specifically designed for automotive use cases including engine control units, body control modules, and ADAS sensor interfaces. Its 175 °C maximum junction temperature, glass-passivated junction, and DO-15 mechanical robustness meet stringent automotive reliability requirements. The HE3 suffix explicitly denotes AEC-Q101 qualification per Vishay's ordering nomenclature.
How does the unidirectional configuration of P6KE51AHE3/54 affect circuit placement?
P6KE51AHE3/54 must be installed with its cathode (marked end) toward the positive side of the protected line and anode to ground. This orientation enables reverse-biased clamping during overvoltage events while blocking normal operating voltage up to 43.6 V. Incorrect polarity results in forward conduction and potential device failure. P6KE51AHE3/54 is not suitable for bidirectional AC line protection without external circuitry.
What is the thermal resistance of P6KE51AHE3/54 and why does it matter?
P6KE51AHE3/54 has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W, meaning each watt of sustained power dissipation raises the junction temperature by 20 °C above lead temperature. This parameter is critical for predicting temperature rise during repetitive surges or continuous leakage scenarios. Effective heat sinking via PCB copper or chassis contact directly improves surge endurance and long-term reliability of P6KE51AHE3/54.
Can P6KE51AHE3/54 replace P6KE51A-E3/54 in existing designs?
Yes, P6KE51AHE3/54 is a direct replacement for P6KE51A-E3/54 with identical electrical specifications, DO-15 package dimensions, and pinout. The only difference is the HE3 suffix indicating AEC-Q101 qualification versus the E3 suffix for commercial-grade qualification. No PCB layout or schematic changes are required when upgrading to P6KE51AHE3/54 for automotive or high-reliability applications.
P6KE51AHE3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- TransZorb®
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
P6KE51AHE3/54 FAQ
1.How can I place an order for P6KE51AHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6KE51AHE3/54 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 P6KE51AHE3/54 reliable?
The price and inventory of P6KE51AHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6KE51AHE3/54 is usually 5 days.
3.What payment methods are accepted for P6KE51AHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6KE51AHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6KE51AHE3/54?
P6KE51AHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6KE51AHE3/54 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 P6KE51AHE3/54?
For technical support, including P6KE51AHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6KE51AHE3/54 requirements.
6.How does Aetrix verify that P6KE51AHE3/54 is sourced from the original manufacturer or authorized distributors?
All P6KE51AHE3/54 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 P6KE51AHE3/54 meets industry standards.
7.What is the process for return or replacement of P6KE51AHE3/54?
All P6KE51AHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with P6KE51AHE3/54, 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 P6KE51AHE3/54 part is unused and in its original packaging.
Return procedure for P6KE51AHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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