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Vishay General Semiconductor - Diodes Division P4KE51-E3/54
- Part No.:
- P4KE51-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE51-E3/54.pdf
- Description:
- TVS DIODE 41.3VWM 73.5VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:5,617
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Product details
Overview
P4KE51-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-41 package, designed for clamping voltage transients on power and signal 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, and 400 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive sensor protection and industrial power supply input stages.
For engineers reviewing the P4KE51-E3/54 datasheet, P4KE51-E3/54 pinout, P4KE51-E3/54 application, or P4KE51-E3/54 equivalent, key selection criteria include clamping voltage margin vs. protected IC VDD, thermal resistance (RθJL = 66 °C/W), AEC-Q101 qualification status, DO-41 lead-form compatibility, and unidirectional polarity marking (cathode band).
Technical Context
This TVS diode operates as a shunt-clamping device, conducting above its breakdown voltage to divert surge energy away from downstream circuitry. Its glass-passivated junction ensures stable VBR tolerance (±5 %) and low leakage (<1.0 μA at VWM), while the 10/1000 μs surge rating reflects standardized lightning/inductive-switching transient immunity per IEC 61000-4-5.
Thermal design relies on junction-to-lead resistance (66 °C/W) and 175 °C max junction temperature, enabling operation up to 125 °C ambient when derated per Fig. 2. The 1.5 W steady-state power dissipation (PD) and 40 A 8.3 ms forward surge rating support robustness against repetitive overvoltage events in DC power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43.6 V - Maximum continuous reverse working voltage before significant leakage; sets upper limit for normal operating rail voltage. |
| VBR min/max | 48.5 V / 53.6 V at 1 mA - Confirmed breakdown range defining turn-on threshold; tight tolerance enables predictable clamping onset. |
| VC @ IPPM | 70.1 V at 5.7 A - Clamped voltage during 10/1000 μs surge; determines maximum stress imposed on protected IC inputs. |
| PPPM | 400 W - Peak pulse power handling with standard 10/1000 μs waveform; validates suitability for Level 3/4 IEC 61000-4-5 surges. |
| TJ max | +175 °C - Maximum junction temperature; supports under-hood automotive use with appropriate PCB copper pour and lead length. |
| RθJL | 66 °C/W - Junction-to-lead thermal resistance; informs heatsinking requirements when mounted on FR4 with 10 mm leads. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; required for ASIL-B sensor interfaces. |
Pinout & Package
Package: DO-41 (DO-204AL), axial-leaded, molded epoxy body with matte tin-plated leads. Cathode identified by color band on unidirectional types like P4KE51-E3/54.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path); conducts during positive transients when cathode is biased higher. |
| Cathode | Reverse-biased clamping terminal | Marked with color band; connected to protected line (e.g., 48 V rail); avalanches into conduction when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR over lifetime and humidity exposure; eliminates need for hermetic sealing in cost-sensitive automotive modules. |
| 400 W peak pulse power (10/1000 μs) | Validates compliance with IEC 61000-4-5 surge immunity test levels for industrial and automotive ECUs without external heat sinking. |
| AEC-Q101 qualified | Confirms qualification for automotive applications including engine control, body electronics, and ADAS sensor interfaces per stress test requirements. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage overshoot during clamping; critical for protecting 50 V-rated MOSFET gates and CAN transceivers. |
| DO-41 mechanical compatibility | Enables drop-in replacement in legacy designs using through-hole assembly; supports manual rework and automated insertion. |
Applications
| Automotive Sensor Protection | Industrial Power Supply Input |
|---|---|
Use Scenario: Protecting 48 V battery-sensed analog front-end circuits in vehicle door modules from load-dump transients. IC Role / Device Role / Timing Role: Shunt-clamping TVS placed between sensor supply rail and chassis ground to clamp spikes up to ±100 V. Use Value: Limits voltage seen by 50 V-rated op-amps and ADC references to ≤70.1 V, preventing latch-up and parametric shift. |
Use Scenario: Safeguarding AC/DC converter primary-side rectifier output against switching surges and lightning-induced ring waves. IC Role / Device Role / Timing Role: Unidirectional TVS connected anode-to-ground, cathode-to-rail to suppress positive-going transients on 48 V DC bus. Use Value: Absorbs 400 W surge energy within 1 ms, maintaining system uptime without fuse blowing or MOSFET avalanche failure. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Shielding RS-485 transceiver power pins in outdoor base station equipment exposed to induced lightning surges. IC Role / Device Role / Timing Role: Standoff-rated TVS on VCC line to prevent transceiver damage during 10/1000 μs common-mode surges. Use Value: Clamps to 70.1 V before transceiver absolute maximum rating (75 V) is exceeded, preserving data integrity and longevity. |
Use Scenario: Suppressing inductive kickback from brushed DC motor drivers in smart washing machines during commutation. IC Role / Device Role / Timing Role: Unidirectional TVS across motor terminals to clamp flyback voltage spikes generated by H-bridge FET turn-off. Use Value: Limits spike amplitude to 70.1 V, preventing gate oxide rupture in 60 V logic-level MOSFETs and reducing EMI radiation. |
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; 51 V VBR; 64.5 V VC @ 6.2 A; 600 W PPPM; surface-mount only. | Requires PCB redesign for SMD layout; better thermal performance on copper planes but no through-hole option. | Select SMBJ51A when board space is constrained and automated SMT assembly is available. |
| 1.5KE51A | DO-201AD package; same VBR/VC specs; 1500 W PPPM; larger footprint; higher IFSM (200 A). | Overqualified for 400 W needs; used where higher single-event surge margin is mandated (e.g., utility meter mains input). | Choose 1.5KE51A only if legacy DO-201AD footprint exists or >1 kW surge headroom is required. |
Compared with SMBJ51A and 1.5KE51A, P4KE51-E3/54 offers optimal balance of proven DO-41 through-hole manufacturability, AEC-Q101 qualification, and precise 400 W surge rating - making it ideal for cost-sensitive, high-volume automotive and industrial modules where leaded reliability and reworkability are prioritized.
Availability
P4KE51-E3/54 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial power supply inputs, telecom line protection, and consumer appliance motor control requiring stable component supply across multi-year production cycles.
Supply support for P4KE51-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, TVS devices, and optoelectronics with emphasis on reliability and automotive-grade qualification.
The P4KE51-E3/54 belongs to Vishay's TRANSZORB® family of transient voltage suppressors, engineered specifically for robust, cost-effective overvoltage protection in harsh environments including automotive, industrial, and telecom infrastructure.
FAQ
What is the clamping voltage of P4KE51-E3/54 and how does it protect downstream components?
The P4KE51-E3/54 has a maximum clamping voltage (VC) of 70.1 V at 5.7 A peak pulse current with a 10/1000 μs waveform. This value defines the highest voltage that will appear across the protected line during a surge event. By limiting transient voltage to ≤70.1 V, the P4KE51-E3/54 ensures that downstream components rated for 75 V absolute maximum - such as certain CAN transceivers or 48 V power management ICs - remain within safe operating limits and avoid destructive overvoltage failure.
Is P4KE51-E3/54 suitable for automotive applications?
Yes, P4KE51-E3/54 is AEC-Q101 qualified, confirming its reliability for automotive use including engine compartments, body control modules, and ADAS sensor units. Its 175 °C maximum junction temperature, glass-passivated junction, and DO-41 mechanical robustness meet automotive environmental stress requirements. The "E3" suffix also indicates RoHS compliance and JESD 201 Class 1A whisker resistance - essential for long-life vehicular systems.
How does the DO-41 package of P4KE51-E3/54 affect thermal performance?
The DO-41 package of P4KE51-E3/54 provides a typical junction-to-lead thermal resistance (RθJL) of 66 °C/W, enabling effective heat transfer to PCB copper or chassis via its axial leads. With 10 mm lead length, it achieves ~100 °C/W junction-to-ambient resistance. This allows sustained operation at 125 °C ambient when derated per Vishay's Fig. 2, making it viable for enclosed automotive and industrial enclosures without forced airflow.
What is the difference between P4KE51-E3/54 and P4KE51A-E3?
P4KE51-E3/54 specifies packaging and reel configuration: "/54" denotes 5500-piece 13-inch paper tape and reel delivery. P4KE51A-E3 refers to the same electrical and mechanical device but omits packaging detail. Both share identical VWM (43.6 V), VBR (48.5–53.6 V), VC (70.1 V), and AEC-Q101 qualification. The "-E3" suffix confirms RoHS compliance and commercial-grade specification; "HE3" would indicate AEC-Q101 grade with enhanced whisker testing.
Can P4KE51-E3/54 be used in bidirectional configurations?
No, P4KE51-E3/54 is unidirectional - indicated by the absence of "CA" suffix (e.g., P4KE51CA). It conducts only when cathode voltage exceeds anode by ≥VBR, making it suitable for DC rail protection with defined polarity. For AC or dual-polarity signal lines, a bidirectional variant like P4KE51CA must be selected, which exhibits symmetric clamping in both directions and lacks polarity marking.
P4KE51-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:
- 1
- Bidirectional Channels:
- -
- 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)
P4KE51-E3/54 FAQ
1.How can I place an order for P4KE51-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE51-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 P4KE51-E3/54 reliable?
The price and inventory of P4KE51-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 P4KE51-E3/54 is usually 5 days.
3.What payment methods are accepted for P4KE51-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE51-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE51-E3/54?
P4KE51-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE51-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 P4KE51-E3/54?
For technical support, including P4KE51-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE51-E3/54 requirements.
6.How does Aetrix verify that P4KE51-E3/54 is sourced from the original manufacturer or authorized distributors?
All P4KE51-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 P4KE51-E3/54 meets industry standards.
7.What is the process for return or replacement of P4KE51-E3/54?
All P4KE51-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with P4KE51-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 P4KE51-E3/54 part is unused and in its original packaging.
Return procedure for P4KE51-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KE51-E3/54 Tags
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