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Vishay General Semiconductor - Diodes Division P4KE51C-E3/73
- Part No.:
- P4KE51C-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE51C-E3/73.pdf
- Description:
- TVS DIODE 41.3VWM 73.5VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:5,649
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Product details
Overview
P4KE51C-E3/73 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode in DO-41 package, designed for clamping voltage transients on signal and power lines. It features a 43.6 V stand-off voltage (VWM), 48.5–53.6 V breakdown voltage (VBR) at 1 mA, 70.1 V maximum clamping voltage (VC) at 5.7 A peak pulse current (IPPM), and 400 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive sensor protection and industrial I/O interface circuits.
For engineers reviewing the P4KE51C-E3/73 datasheet, P4KE51C-E3/73 pinout, P4KE51C-E3/73 application, or P4KE51C-E3/73 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, DO-41 mechanical compatibility, and verified 175 °C junction temperature rating under transient surge conditions.
Technical Context
This device operates as a voltage-clamping protector using an avalanche breakdown mechanism, with symmetrical conduction in both polarities due to its bidirectional construction. Its glass-passivated junction ensures stable VBR tolerance and low incremental surge resistance, enabling consistent clamping performance across repetitive 10/1000 μs transients at 0.01% duty cycle.
The P4KE51C-E3/73 exhibits a temperature coefficient of +0.102 %/°C for VBR and maintains ≤1.0 μA reverse leakage at VWM (43.6 V) up to 25 °C. Thermal resistance is rated at 66 °C/W (junction-to-lead) and 100 °C/W (junction-to-ambient), supporting reliable operation in lead-soldered PCB layouts without heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 43.6 V - Maximum continuous reverse working voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 48.5–53.6 V at 1 mA - Avalanche onset range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 70.1 V at 5.7 A IPPM - Peak voltage seen by protected circuit during 10/1000 μs surge; determines downstream component stress. |
| PPPM (Peak Pulse Power) | 400 W - Sustained energy absorption capability per transient; validated per Fig. 1 in datasheet 88365. |
| TJ max. | 175 °C - Maximum junction temperature; enables use in under-hood automotive environments and high-ambient industrial settings. |
| Package | DO-41 (DO-204AL) - Standard axial-leaded through-hole package; compatible with legacy wave-solder and hand-solder processes. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
DO-41 (DO-204AL) package: axial-leaded, molded epoxy body with matte tin-plated leads; no polarity marking for bidirectional types; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Identical electrical behavior in either direction; no cathode band marking required for bidirectional operation. |
| Lead 1 | Junction connection | Directly bonded to silicon die; serves as primary thermal and current path to PCB copper pour or trace. |
| Lead 2 | Junction connection | Electrically identical to Lead 1; bidirectional symmetry eliminates orientation constraints during placement. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables ±5% VBR tolerance and stable long-term leakage performance under humidity and thermal stress. |
| 400 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 Level 3 (1 kV line-to-line) surge immunity without derating in standard PCB layouts. |
| AEC-Q101 qualified | Validated for automotive powertrain, body electronics, and ADAS sensor interfaces requiring zero-failure field reliability. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage exposure to downstream ICs such as CAN transceivers or microcontroller GPIOs. |
| 175 °C maximum junction temperature | Permits operation in engine control units and industrial motor drives where ambient exceeds 125 °C. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure and temperature sensors in engine bay modules 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 voltage to ≤70.1 V during 10/1000 μs surges, preserving ADC integrity and preventing latch-up in 3.3 V or 5 V signal chains. |
Use Scenario: Safeguarding RS-485 transceiver data lines in factory automation PLCs subject to inductive switching noise. IC Role / Device Role / Timing Role: Line-side TVS on differential bus pairs (A/B) to suppress common-mode transients up to 400 W. Use Value: Maintains signal integrity by clamping surges within 1.0 ns response time while adding <1 pF junction capacitance at 0 V bias. |
| Consumer Power Adapter Input | Telecom Line Card Surge Protection |
Use Scenario: Secondary-side DC bus protection in USB-C PD adapters against coupling from primary-side MOSFET switching noise. IC Role / Device Role / Timing Role: Unidirectional/bidirectional clamp on 5–20 V output rails upstream of DC-DC regulators. Use Value: Absorbs repetitive 400 W pulses without degradation, enabling compliance with UL 62368-1 transient immunity requirements. |
Use Scenario: Primary protection stage on telephone line interface cards handling POTS and VoIP signals. IC Role / Device Role / Timing Role: First-tier TVS on tip/ring lines before hybrid transformers and SLIC devices. Use Value: Withstands repeated lightning-induced surges (IEC 61000-4-5) while maintaining ≤1.0 μA leakage at 43.6 V for low standby power. |
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 | DO-214AA package; 51 V VBR; same 400 W PPPM but lower RθJA (50 °C/W); higher VF (5.0 V). | Suitable for surface-mount designs with space constraints; requires rework of footprint and thermal relief. | Select when board real estate is limited and SMT assembly is preferred over through-hole. |
| 1.5KE51CA | DO-201AD package; same VBR and VC; 1500 W PPPM (10/1000 μs); larger body; higher IFSM (200 A). | Used in high-energy surge zones (e.g., AC mains input); not AEC-Q101 qualified. | Choose for non-automotive, high-surge industrial front-end protection where DO-41 size is insufficient. |
Compared with SMBJ51CA and 1.5KE51CA, the P4KE51C-E3/73 offers AEC-Q101 qualification and DO-41 compatibility for legacy automotive and industrial through-hole designs, balancing surge robustness, thermal performance, and qualification rigor without requiring layout changes.
Availability
P4KE51C-E3/73 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial I/O interfaces, and telecom line card designs requiring stable component supply, long-lifecycle support, and AEC-Q101-compliant surge protection.
Supply support for P4KE51C-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, precision, and automotive qualification.
The P4KE51C-E3/73 belongs to the TRANSZORB® family of TVS diodes engineered specifically for bidirectional transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure applications demanding AEC-Q101 validation and repeatable clamping performance.
FAQ
What is the polarity configuration of the P4KE51C-E3/73?
The P4KE51C-E3/73 is a bidirectional TVS diode, meaning it provides symmetrical clamping in both forward and reverse directions. Unlike unidirectional variants (e.g., P4KE51A), it has no cathode band marking and is intended for AC-coupled or floating signal line protection where polarity reversal may occur during transients.
Does the P4KE51C-E3/73 meet AEC-Q101 requirements?
Yes, the P4KE51C-E3/73 is AEC-Q101 qualified, as confirmed in Vishay's datasheet 88365 (Revision: 16-Sep-2021). This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, making the P4KE51C-E3/73 suitable for automotive powertrain and body electronics applications.
What is the maximum clamping voltage of the P4KE51C-E3/73 at rated peak pulse current?
The P4KE51C-E3/73 has a maximum clamping voltage (VC) of 70.1 V at 5.7 A peak pulse current (IPPM), measured under standardized 10/1000 μs waveform conditions. This value defines the upper voltage limit imposed on protected circuitry during surge events and is critical for ensuring downstream IC survival.
Can the P4KE51C-E3/73 be used in surface-mount designs?
No, the P4KE51C-E3/73 uses a DO-41 (DO-204AL) axial-leaded through-hole package and is not compatible with surface-mount assembly. For SMT alternatives, consider the SMBJ51CA (DO-214AA) or SMCJ51CA (DO-214AB), which share similar electrical specs but require footprint redesign and requalification.
What is the junction-to-lead thermal resistance of the P4KE51C-E3/73?
The P4KE51C-E3/73 has a typical junction-to-lead thermal resistance (RθJL) of 66 °C/W, as specified in the Thermal Characteristics table of datasheet 88365. This parameter supports thermal design when mounting the device directly to copper pours or thick traces to dissipate surge energy without exceeding 175 °C junction temperature.
P4KE51C-E3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AL, DO-41, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- 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-E3/73 FAQ
1.How can I place an order for P4KE51C-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE51C-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 P4KE51C-E3/73 reliable?
The price and inventory of P4KE51C-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 P4KE51C-E3/73 is usually 5 days.
3.What payment methods are accepted for P4KE51C-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE51C-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE51C-E3/73?
P4KE51C-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE51C-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 P4KE51C-E3/73?
For technical support, including P4KE51C-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE51C-E3/73 requirements.
6.How does Aetrix verify that P4KE51C-E3/73 is sourced from the original manufacturer or authorized distributors?
All P4KE51C-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 P4KE51C-E3/73 meets industry standards.
7.What is the process for return or replacement of P4KE51C-E3/73?
All P4KE51C-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with P4KE51C-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 P4KE51C-E3/73 part is unused and in its original packaging.
Return procedure for P4KE51C-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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