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Vishay General Semiconductor - Diodes Division P4KE51A-E3/54
- Part No.:
- P4KE51A-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE51A-E3/54.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:5,798
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Product details
Overview
P4KE51A-E3/54 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-41 package, designed for clamping inductive switching transients and ESD events. It features a 48.5 V minimum breakdown voltage (VBR), 43.6 V maximum 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 - used in automotive sensor signal line protection and industrial I/O interface surge suppression.
For engineers reviewing the P4KE51A-E3/54 datasheet, P4KE51A-E3/54 pinout, P4KE51A-E3/54 application, or P4KE51A-E3/54 equivalent, key selection criteria include verified clamping performance at 5.7 A IPPM, unidirectional polarity with cathode band marking, DO-41 mechanical compatibility, AEC-Q101 qualification status (E3 suffix = commercial grade; HE3 required for automotive qualification), and thermal resistance of 100 °C/W junction-to-ambient.
Technical Context
This device operates as a silicon avalanche diode optimized for fast-response overvoltage clamping. Its glass-passivated junction enables stable VBR tolerance (±5 %), low incremental surge resistance, and repeatable 10/1000 μs waveform handling up to 400 W. The unidirectional configuration provides forward conduction path during negative transients only when reverse-biased beyond VBR.
Thermal design relies on RθJA = 100 °C/W and RθJL = 66 °C/W, supporting operation from –55 °C to +175 °C junction temperature. It meets JESD 22-B106 solder dip requirements (275 °C max, 10 s) and JESD 201 Class 1A whisker testing, with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102.
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 with ±5 % tolerance |
| VWM | 43.6 V maximum - ensures no conduction during normal 43 V system operation |
| VC @ IPPM | 70.1 V at 5.7 A - limits downstream IC voltage stress during 400 W transient event |
| PPPM | 400 W with 10/1000 μs waveform - sustains single high-energy surges common in automotive load-dump and inductive kick scenarios |
| IFSM | 40 A peak forward surge (8.3 ms half-sine) - supports robustness against repetitive inrush or fault currents |
| TJ range | –55 °C to +175 °C - enables deployment in under-hood automotive and industrial environments without derating |
| Leakage @ VWM | 1.0 μA maximum - minimizes standby power loss in battery-powered sensor nodes |
Pinout & Package
Package: DO-41 (DO-204AL), axial-leaded molded epoxy case with UL 94 V-0 rating. Cathode identified by color band on body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / reverse voltage reference node | Connected to system ground or low-side return path; establishes reference for clamping action |
| Cathode | Avalanche conduction terminal / transient sink | Connected to protected line (e.g., CAN_H, LIN, sensor output); conducts surge current to ground when VAK exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures long-term VBR stability and low parameter drift across temperature and lifetime |
| 400 W peak pulse power (10/1000 μs) | Handles ISO 7637-2 Pulse 1/2a/5a-level transients without degradation in automotive ECUs |
| AEC-Q101 qualified variant available (HE3 suffix) | Enables drop-in qualification upgrade path for automotive applications requiring certified reliability |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage margin between clamping and IC absolute maximum ratings |
| Matte tin-plated leads | Guarantees solderability per J-STD-002 and eliminates whisker risk per JESD 201 Class 1A |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog outputs of pressure/temperature sensors in engine control modules exposed to load-dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor output and ground to clamp reverse transients while allowing normal DC bias. Use Value: Limits voltage excursion to ≤70.1 V during 5.7 A surge, preventing damage to 3.3 V or 5 V ADC front-ends and maintaining signal integrity. |
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from field-wiring induced surges and ESD. IC Role / Device Role / Timing Role: Standoff device mounted at connector entry point to shunt transient energy before reaching optocoupler or MCU GPIO. Use Value: Withstands 400 W pulses without failure and maintains <1.0 μA leakage at 24 V nominal, ensuring clean logic thresholds. |
| Consumer Power Adapter Input | Telecom Line Interface Protection |
Use Scenario: Secondary-side transient suppression on DC output rails of wall adapters subject to capacitive discharge and hot-plug events. IC Role / Device Role / Timing Role: Fast-clamping element parallel to load, activated within nanoseconds upon overvoltage detection. Use Value: Clamps 43.6 V nominal rail to 70.1 V during surge, protecting downstream LDOs and USB power switches rated for 20 V max. |
Use Scenario: Primary protection for RS-485 transceiver lines in base station backhaul equipment operating in lightning-prone outdoor cabinets. IC Role / Device Role / Timing Role: First-line defense against induced surges on differential pairs, coordinated with common-mode chokes. Use Value: Delivers 400 W dissipation capability and 175 °C max junction temperature, enabling operation in sealed enclosures up to 85 °C ambient. |
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, 600 W PPPM, same VBR (48.5–53.6 V), lower VC (82.4 V @ 4.9 A) | Surface-mount footprint; higher power but larger board area; requires reflow not wave solder | Select SMBJ51A when PCB space allows SMD layout and higher surge margin is needed beyond 400 W |
| 1.5KE51A | DO-201AD package, 1500 W PPPM, identical VBR/VWM/VC specs, higher IPPM (23.3 A) | Through-hole but larger body; suited for high-reliability industrial mains interfaces | Choose 1.5KE51A where legacy through-hole mounting is retained and >400 W surge immunity is mandated |
Compared with SMBJ51A and 1.5KE51A, P4KE51A-E3/54 offers optimal balance of cost, DO-41 compatibility with existing through-hole tooling, and sufficient 400 W surge rating for sensor-level and low-power interface protection - making it ideal for volume automotive and industrial designs where leaded reliability and solder process flexibility are prioritized.
Availability
P4KE51A-E3/54 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and consumer power adapter secondary-side protection requiring stable component supply, RoHS compliance, and traceable sourcing.
Supply support for P4KE51A-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade qualification.
The P4KE series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for robust, standardized transient suppression in cost-sensitive, high-volume applications across automotive, industrial, and consumer markets.
FAQ
What is the breakdown voltage tolerance for P4KE51A-E3/54?
The P4KE51A-E3/54 has a specified breakdown voltage range of 48.5 V to 53.6 V at 1.0 mA test current, corresponding to a ±5 % tolerance around the nominal 51 V rating. This tight tolerance ensures predictable clamping behavior across production lots and supports precise coordination with downstream IC voltage limits.
Is P4KE51A-E3/54 qualified for automotive use?
P4KE51A-E3/54 carries the E3 suffix, indicating RoHS-compliant commercial-grade construction. For automotive applications requiring AEC-Q101 qualification, the HE3 suffix variant (e.g., P4KE51AHE3/54) must be selected - it shares identical electrical specs but adds full stress-test validation per AEC-Q101 standards.
What is the maximum clamping voltage of P4KE51A-E3/54 under surge conditions?
The P4KE51A-E3/54 exhibits a maximum clamping voltage (VC) of 70.1 V when subjected to its rated 5.7 A peak pulse current (IPPM) using the standard 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during transient events.
Can P4KE51A-E3/54 be used in bidirectional configurations?
No - P4KE51A-E3/54 is a unidirectional TVS diode, identifiable by its cathode band marking. Bidirectional operation requires the CA-suffixed variant (e.g., P4KE51CA), which lacks polarity marking and clamps symmetrically in both directions with matched VBR characteristics.
What is the thermal resistance of P4KE51A-E3/54, and how does it affect layout?
P4KE51A-E3/54 has a junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead resistance (RθJL) of 66 °C/W. These values assume standard DO-41 mounting with 10 mm lead length; minimizing trace length and maximizing copper pour under leads significantly improves heat dissipation in high-duty-cycle surge environments.
P4KE51A-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:
- 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):
- 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)
P4KE51A-E3/54 FAQ
1.How can I place an order for P4KE51A-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE51A-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 P4KE51A-E3/54 reliable?
The price and inventory of P4KE51A-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 P4KE51A-E3/54 is usually 5 days.
3.What payment methods are accepted for P4KE51A-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE51A-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE51A-E3/54?
P4KE51A-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE51A-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 P4KE51A-E3/54?
For technical support, including P4KE51A-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE51A-E3/54 requirements.
6.How does Aetrix verify that P4KE51A-E3/54 is sourced from the original manufacturer or authorized distributors?
All P4KE51A-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 P4KE51A-E3/54 meets industry standards.
7.What is the process for return or replacement of P4KE51A-E3/54?
All P4KE51A-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with P4KE51A-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 P4KE51A-E3/54 part is unused and in its original packaging.
Return procedure for P4KE51A-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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