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Vishay General Semiconductor - Diodes Division P4KE51CA-E3/73
- Part No.:
- P4KE51CA-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE51CA-E3/73.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:5,111
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Product details
Overview
P4KE51CA-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 or power lines. It features 400 W peak pulse power (10/1000 μs), 43.6 V stand-off voltage (VWM), 48.5–53.6 V breakdown voltage (VBR at 1 mA), and clamps to ≤70.1 V at 5.7 A peak pulse current - deployed in automotive sensor interface protection and industrial I/O line surge suppression.
For engineers reviewing the P4KE51CA-E3/73 datasheet, P4KE51CA-E3/73 pinout, P4KE51CA-E3/73 application, or P4KE51CA-E3/73 equivalent, key selection criteria include bidirectional clamping capability, DO-41 leaded package compatibility with through-hole PCB layouts, AEC-Q101 qualification for automotive use, and verified 175 °C maximum junction temperature handling under transient stress.
Technical Context
This device operates as a silicon avalanche diode optimized for fast-response transient suppression in both polarities. Its glass-passivated junction delivers low incremental surge resistance and sub-nanosecond response time, enabling effective protection against ESD, lightning-induced surges, and inductive switching spikes without affecting normal signal integrity.
The P4KE51CA-E3/73 is rated for 400 W peak pulse power (10/1000 μs waveform, 0.01% duty cycle), 1.5 W steady-state power dissipation on infinite heatsink at 75 °C, and supports operating junction temperatures from –55 °C to +175 °C - making it suitable for harsh-environment applications where thermal derating and long-term reliability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43.6 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (min/max) | 48.5 V / 53.6 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on across production lots. |
| VC @ IPPM | ≤70.1 V at 5.7 A - Clamped voltage during 10/1000 μs surge; determines protected circuit's maximum overvoltage exposure. |
| PPPM | 400 W - Peak pulse power handling per single transient; validated per Fig. 1 in datasheet 88365. |
| TJ max | +175 °C - Maximum junction temperature; enables operation in under-hood automotive or high-ambient industrial environments. |
| ID @ VWM | 1.0 μA - Reverse leakage at stand-off voltage; negligible loading on high-impedance signal paths. |
| Package | DO-41 (DO-204AL) - Axial-leaded, epoxy-molded package with UL 94 V-0 rating; compatible with wave soldering (275 °C, 10 s). |
Pinout & Package
DO-41 (DO-204AL) package: axial-leaded, cylindrical epoxy body with matte tin-plated leads. No polarity marking for bidirectional types; symmetric terminal function.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | Either lead serves as input/output; no cathode band marking; identical clamping behavior in both directions. |
| Lead 1 | Terminal for PCB mounting and thermal conduction | Provides mechanical anchoring and partial heat path; RθJL = 66 °C/W typical to lead. |
| Lead 2 | Terminal for PCB mounting and thermal conduction | Second mechanical and thermal interface; symmetric with Lead 1; no functional distinction. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable, repeatable avalanche characteristics over lifetime and temperature; reduces parameter drift vs. non-passivated alternatives. |
| 400 W peak pulse power (10/1000 μs) | Validated surge handling for IEC 61000-4-5 Level 3 (1 kV/2 Ω) and ISO 7637-2 Pulse 1/2a/3a in automotive systems. |
| AEC-Q101 qualified | Qualified for automotive electronics per stress test requirements including HTGB, HTRB, and TCT; supports PPAP documentation. |
| UL 94 V-0 molding compound | Self-extinguishing epoxy housing prevents flame propagation in enclosed enclosures - required for industrial safety certifications. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage stress on downstream ICs; improves margin versus competing TVS diodes with higher VC. |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Analog Input Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential signal pair or supply rail to divert surge energy to ground. Use Value: Maintains signal integrity during 10/1000 μs transients up to 400 W while operating within AEC-Q101 automotive qualification limits. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers against field-wiring induced surges. IC Role / Device Role / Timing Role: Standoff-connected TVS across input terminals to limit transient voltage before reaching precision op-amps or ADCs. Use Value: 43.6 V VWM allows full utilization of ±10 V input range while clamping to ≤70.1 V - preserving downstream component reliability. |
| Telecom Line Surge Suppression | Consumer Power Adapter Input Protection |
|
Use Scenario: Secondary-side surge protection on Ethernet PHY interfaces or RS-485 data lines exposed to lightning-induced coupling. IC Role / Device Role / Timing Role: Bidirectional shunt device placed between signal line and local ground to clamp common-mode transients. Use Value: Symmetric clamping ensures equal protection for positive/negative polarity surges - critical for balanced differential signaling. |
Use Scenario: Input-stage overvoltage protection on AC-DC adapters and USB-C PD chargers subjected to mains-borne surges. IC Role / Device Role / Timing Role: Primary-side TVS across bridge rectifier output to suppress line-to-line and line-to-ground transients. Use Value: 175 °C TJmax supports reliable operation in thermally constrained adapter housings without derating penalties. |
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. through-hole DO-41); same VWM (43.6 V), slightly lower PPPM (600 W vs. 400 W), higher IPPM (12.3 A). | Requires SMT reflow process; better suited for space-constrained PCBs but lacks axial mechanical robustness for high-vibration environments. | Select SMBJ51CA when board area is limited and automated assembly is used; retain P4KE51CA-E3/73 for manual assembly, serviceability, or high-shock applications. |
| 1.5KE51CA | Higher PPPM (1500 W), larger DO-201AD package; identical VWM, VBR, and bidirectional functionality. | Designed for higher-energy transients (e.g., telecom central office, industrial motor drives); requires larger PCB footprint and higher mounting torque. | Choose 1.5KE51CA only when system-level testing confirms >400 W surge exposure; otherwise P4KE51CA-E3/73 provides optimal cost/performance balance. |
Compared with SMBJ51CA and 1.5KE51CA, the P4KE51CA-E3/73 delivers proven AEC-Q101 qualification in a serviceable through-hole package with precise 43.6 V standoff - making it the preferred choice for automotive and industrial designs requiring traceable qualification, mechanical durability, and legacy-compatible layout.
Availability
P4KE51CA-E3/73 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, and telecom line interface circuits requiring stable component supply with full AEC-Q101 compliance and RoHS-3 adherence.
Supply support for P4KE51CA-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade qualification.
The P4KE51CA-E3/73 belongs to Vishay's TRANSZORB® TVS family, engineered specifically for robust, bidirectional transient suppression in automotive, industrial, and telecom infrastructure applications where failure modes must be tightly controlled.
FAQ
What is the clamping voltage of the P4KE51CA-E3/73 at its rated peak pulse current?
The P4KE51CA-E3/73 clamps to a maximum of 70.1 V at its specified peak pulse current of 5.7 A (10/1000 μs waveform). This value is measured per Figure 1 and Table on page 2 of Vishay datasheet 88365 and represents the upper limit of voltage seen by protected circuitry during a standardized surge event. The P4KE51CA-E3/73 maintains this clamping performance across its qualified temperature range.
Is the P4KE51CA-E3/73 suitable for automotive applications?
Yes, the P4KE51CA-E3/73 is AEC-Q101 qualified per Vishay documentation and explicitly listed as HE3-suffix eligible in the datasheet. Its construction - including glass-passivated junction, DO-41 package with matte tin leads, and 175 °C maximum junction temperature - meets automotive environmental stress requirements. The P4KE51CA-E3/73 is widely deployed in ECU sensor interfaces and infotainment power rails.
How does the bidirectional design of the P4KE51CA-E3/73 affect its circuit placement?
The P4KE51CA-E3/73 has no polarity marking and functions identically in both directions, allowing placement across any two nodes requiring symmetrical overvoltage protection - such as differential signal pairs or AC-coupled lines. Unlike unidirectional TVS diodes, the P4KE51CA-E3/73 eliminates orientation errors during assembly and simplifies layout for balanced protection schemes.
What is the thermal resistance from junction to lead for the P4KE51CA-E3/73?
The P4KE51CA-E3/73 has a typical junction-to-lead thermal resistance (RθJL) of 66 °C/W, as specified in the Thermal Characteristics table on page 3 of Vishay datasheet 88365. This parameter enables accurate thermal modeling when mounted on PCBs with copper pour or heatsinking leads, and directly informs derating calculations above 25 °C ambient.
Does the P4KE51CA-E3/73 meet RoHS and REACH requirements?
Yes, the P4KE51CA-E3/73 carries the "E3" suffix indicating full RoHS-compliance per EU Directive 2011/65/EU and Vishay's material declaration Doc. 99912. It contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits, and satisfies REACH SVHC screening per current revision. The P4KE51CA-E3/73 is also halogen-free and compliant with JESD201 Class 1A whisker testing.
P4KE51CA-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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 43.6V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 5.7A
- 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)
P4KE51CA-E3/73 FAQ
1.How can I place an order for P4KE51CA-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE51CA-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 P4KE51CA-E3/73 reliable?
The price and inventory of P4KE51CA-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 P4KE51CA-E3/73 is usually 5 days.
3.What payment methods are accepted for P4KE51CA-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE51CA-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE51CA-E3/73?
P4KE51CA-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE51CA-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 P4KE51CA-E3/73?
For technical support, including P4KE51CA-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE51CA-E3/73 requirements.
6.How does Aetrix verify that P4KE51CA-E3/73 is sourced from the original manufacturer or authorized distributors?
All P4KE51CA-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 P4KE51CA-E3/73 meets industry standards.
7.What is the process for return or replacement of P4KE51CA-E3/73?
All P4KE51CA-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with P4KE51CA-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 P4KE51CA-E3/73 part is unused and in its original packaging.
Return procedure for P4KE51CA-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KE51CA-E3/73 Tags
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