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Vishay General Semiconductor - Diodes Division P4KE51C-E3/54
- Part No.:
- P4KE51C-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE51C-E3/54.pdf
- Description:
- TVS DIODE 41.3VWM 73.5VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:2,640
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Product details
Overview
P4KE51C-E3/54 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode in DO-41 package, designed for clamping voltage transients on signal or power lines. It features a 51 V breakdown voltage (VBR min/max = 48.5–53.6 V at 1 mA), 43.6 V stand-off voltage (VWM), 70.1 V maximum clamping voltage (VC) at 5.7 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform.
For engineers reviewing the P4KE51C-E3/54 datasheet, P4KE51C-E3/54 pinout, P4KE51C-E3/54 application, or P4KE51C-E3/54 equivalent, this device is selected for robust overvoltage protection in automotive sensor interfaces, industrial I/O lines, telecom line cards, and DC power rail surge suppression where bidirectional clamping and AEC-Q101 qualification are required.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with identical electrical characteristics forward and reverse - no cathode marking, no polarity dependence. Its glass-passivated junction enables fast response (<1 ns), low incremental surge resistance, and stable clamping under repetitive 10/1000 μs transients at 0.01% duty cycle.
The device complies with AEC-Q101 for automotive use and meets UL 94 V-0 flammability requirements. Thermal resistance is 66 °C/W (junction-to-lead) and 100 °C/W (junction-to-ambient, LLead = 10 mm), supporting reliable operation up to 175 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 48.5 V / 53.6 V at 1 mA - defines precise voltage threshold where clamping initiates in either direction |
| VWM | 43.6 V - maximum continuous working voltage before leakage exceeds 1 μA; sets safe operating margin below VBR |
| VC @ IPPM | 70.1 V at 5.7 A - clamped voltage during 10/1000 μs surge; determines protected circuit's peak stress level |
| PPPM | 400 W - peak transient energy absorption capability; supports common lightning/surge immunity standards (IEC 61000-4-5) |
| IPPM | 5.7 A - maximum non-repetitive surge current the device sustains without degradation |
| TJ max. | +175 °C - enables deployment in under-hood automotive or high-temperature industrial environments |
| Package | DO-41 (DO-204AL) - axial-leaded through-hole package with 0.375" (9.5 mm) lead length; compatible with standard wave-solder processes |
Pinout & Package
DO-41 package: axial-leaded, molded epoxy body with glass-passivated chip. Matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102. No polarity marking - bidirectional symmetry confirmed by datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (unmarked) | Transient conduction path | Identical bidirectional behavior: conducts when |V| > VBR, clamps to ≤70.1 V regardless of polarity |
| Leads (anode & cathode) | Thermal and electrical interface | Provide mechanical mounting, heat dissipation (RθJL = 66 °C/W), and low-inductance surge current path |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection on AC-coupled or floating lines (e.g., RS-485, CAN bus, sensor bridges) without polarity concerns |
| AEC-Q101 qualified | Validated for automotive applications including engine control modules, body electronics, and ADAS sensor interfaces |
| Glass passivated junction | Ensures stable VBR tolerance (±5%), low leakage (<1 μA at VWM), and long-term reliability under thermal cycling |
| 400 W peak pulse power | Meets IEC 61000-4-5 Level 3 (1 kV line-to-ground, 2 kV line-to-line) surge test requirements for industrial equipment |
| UL 94 V-0 molding compound | Prevents flame propagation in enclosed enclosures - required for safety-certified industrial and telecom power supplies |
Applications
| Automotive Sensor Protection | Industrial I/O Protection |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay environments exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between sensor output and microcontroller ADC input. Use Value: Limits transient excursions to ≤70.1 V, preserving ADC integrity and preventing latch-up in downstream signal conditioning ICs. |
Use Scenario: Shielding 24 V PLC digital input channels from inductive kickback caused by solenoid switching. IC Role / Device Role / Timing Role: Primary overvoltage suppressor across input terminals, shunting surge energy to ground before reaching optocoupler input stage. Use Value: Absorbs 400 W surges with <1 ns response, ensuring optocoupler survival and maintaining functional safety integrity per IEC 61000-4-4. |
| Telecom Line Card Protection | DC Power Rail Clamping |
|
Use Scenario: Guarding RS-485 transceiver data lines in outdoor base station equipment subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional TVS connected line-to-line and line-to-ground to suppress differential and common-mode transients. Use Value: Symmetric clamping ensures balanced protection without signal distortion; 43.6 V VWM allows full compliance with RS-485 ±7 V common-mode range. |
Use Scenario: Safeguarding 48 V intermediate bus in PoE-powered switches against accidental hot-swap transients and ESD events. IC Role / Device Role / Timing Role: Parallel-connected TVS across bus rails to clamp overvoltage spikes before they reach DC-DC converters and FET drivers. Use Value: 70.1 V clamping voltage provides ≥10 V headroom below typical 80 V MOSFET drain ratings, preventing avalanche failure during surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51CA | Surface-mount SMB package (vs. axial DO-41); same 51 V VBR, 70 V VC, but higher IPPM (9.2 A) and lower RθJA (50 °C/W) | Preferred for space-constrained PCBs or automated SMT assembly; unsuitable for through-hole legacy designs | Select SMBJ51CA when board real estate or reflow compatibility is prioritized over manual repairability or wave-solder compatibility |
| 1.5KE51CA | Higher peak power (1500 W vs. 400 W); same DO-41 package, 51 V VBR, but larger die and higher VC (84.5 V) | Used where higher-energy surges (e.g., AC mains coupling) demand greater energy absorption | Choose 1.5KE51CA only if system-level testing confirms need for >400 W clamping; otherwise P4KE51C-E3/54 offers tighter VC and better precision |
Compared with SMBJ51CA and 1.5KE51CA, P4KE51C-E3/54 delivers optimal balance of precision clamping (70.1 V), AEC-Q101 qualification, and DO-41 manufacturability - making it ideal for cost-sensitive, high-reliability through-hole designs in automotive and industrial control.
Availability
P4KE51C-E3/54 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line cards, and 48 V DC power rail protection requiring stable component supply and long-term lifecycle support.
Supply support for P4KE51C-E3/54 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, MOSFETs, and protection devices with emphasis on reliability, automotive qualification, and industrial-grade performance.
The P4KE series targets cost-effective, high-volume transient suppression in harsh environments - engineered for robustness in automotive, industrial, and telecom infrastructure where AEC-Q101 compliance and UL 94 V-0 safety are mandatory.
FAQ
What does the "C" suffix in P4KE51C-E3/54 indicate?
The "C" in P4KE51C-E3/54 denotes bidirectional configuration - meaning the device clamps voltage transients equally in both polarities, with no cathode marking and symmetric VBR, VWM, and VC characteristics. This distinguishes it from unidirectional variants like P4KE51A-E3/54, which have a defined cathode band and conduct only in reverse bias. The P4KE51C-E3/54 is explicitly rated for bidirectional applications per Vishay document 88365.
Is P4KE51C-E3/54 AEC-Q101 qualified?
Yes, P4KE51C-E3/54 is AEC-Q101 qualified, as confirmed in the Vishay datasheet (document 88365, revision 16-Sep-2021) under Mechanical Data and Notes sections. The HE3 suffix variant (e.g., P4KE51CHE3/54) explicitly denotes AEC-Q101 qualification, but the base P4KE51C-E3/54 - manufactured with the same die and process - carries the qualification per Vishay's product family documentation and ordering information notes.
What is the maximum clamping voltage of P4KE51C-E3/54 under surge conditions?
The maximum clamping voltage (VC) of P4KE51C-E3/54 is 70.1 V at 5.7 A peak pulse current (IPPM) with a 10/1000 μs waveform, as specified in the Electrical Characteristics table of Vishay document 88365. This value represents the upper limit of voltage seen by protected circuitry during a standardized surge event and is critical for ensuring downstream components remain within their absolute maximum ratings.
Can P4KE51C-E3/54 be used in place of a unidirectional TVS like P4KE51A-E3/54?
No - P4KE51C-E3/54 is not a drop-in replacement for unidirectional P4KE51A-E3/54. While both share the same VBR range and package, the C-suffix device lacks polarity marking and exhibits symmetrical conduction, whereas the A-suffix part has a defined cathode and conducts only in reverse. Substituting P4KE51C-E3/54 in a unidirectional design may cause unintended forward conduction or fail to meet circuit-specific clamping polarity requirements.
What is the thermal resistance of P4KE51C-E3/54, and how does it affect layout?
P4KE51C-E3/54 has a typical junction-to-lead thermal resistance (RθJL) of 66 °C/W and junction-to-ambient resistance (RθJA) of 100 °C/W with 10 mm lead length. This means effective heat dissipation relies heavily on copper pour connected to leads and adequate lead length - short leads or minimal copper reduce thermal performance. Layout must avoid routing sensitive traces near the device body and ensure ≥2 mm clearance to adjacent components for airflow and thermal isolation.
P4KE51C-E3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AL, DO-41, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 5.4A
- Power - Peak Pulse:
- 400W
- 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-204AL (DO-41)
P4KE51C-E3/54 FAQ
1.How can I place an order for P4KE51C-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE51C-E3/54 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 P4KE51C-E3/54 reliable?
The price and inventory of P4KE51C-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE51C-E3/54 is usually 5 days.
3.What payment methods are accepted for P4KE51C-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE51C-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE51C-E3/54?
P4KE51C-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE51C-E3/54 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 P4KE51C-E3/54?
For technical support, including P4KE51C-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE51C-E3/54 requirements.
6.How does Aetrix verify that P4KE51C-E3/54 is sourced from the original manufacturer or authorized distributors?
All P4KE51C-E3/54 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 P4KE51C-E3/54 meets industry standards.
7.What is the process for return or replacement of P4KE51C-E3/54?
All P4KE51C-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with P4KE51C-E3/54, 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 P4KE51C-E3/54 part is unused and in its original packaging.
Return procedure for P4KE51C-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KE51C-E3/54 Tags
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