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Vishay General Semiconductor - Diodes Division P4KE51CAHE3/54
- Part No.:
- P4KE51CAHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE51CAHE3/54.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:2,634
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Product details
Overview
P4KE51CAHE3/54 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 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 - used to protect MOSFETs and sensor interfaces in automotive ECUs.
For engineers reviewing the P4KE51CAHE3/54 datasheet, P4KE51CAHE3/54 pinout, P4KE51CAHE3/54 application, or P4KE51CAHE3/54 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, DO-41 mechanical compatibility, low leakage (<1 μA at VWM), and thermal resistance (RθJL = 66 °C/W) for reliable surge handling in harsh environments.
Technical Context
This device operates as a voltage-clamped crowbar during transient overvoltage events, leveraging avalanche breakdown in both polarities. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling consistent clamping performance across repetitive 10/1000 μs pulses at 0.01% duty cycle.
Designed for unclamped inductive switching and lightning-induced surges, it delivers sub-nanosecond response time and maintains clamping integrity up to TJ = 175 °C. The HE3 suffix confirms AEC-Q101 qualification and JESD 201 Class 2 whisker resistance, supporting automotive under-hood deployment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 48.5 V / 53.6 V at 1 mA - defines precise avalanche initiation threshold for bidirectional protection |
| VWM | 43.6 V - maximum continuous reverse working voltage before leakage exceeds 1 μA |
| VC @ IPPM | 70.1 V at 5.7 A - clamped voltage during 400 W transient, limiting stress on downstream ICs |
| PPPM | 400 W - peak pulse power handling with 10/1000 μs waveform, validated per Fig. 1 |
| IPPM | 5.7 A - peak pulse current corresponding to VC, derated above 25 °C per Fig. 2 |
| TJ max | 175 °C - maximum junction temperature enabling operation in engine control units and industrial drives |
| RθJL | 66 °C/W - thermal resistance from junction to lead, critical for PCB copper pour design |
Pinout & Package
DO-41 (DO-204AL) molded epoxy package with matte tin-plated leads; no polarity marking for bidirectional configuration; body length 25.4 mm min, lead diameter 0.71–0.86 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (unmarked) | Bidirectional avalanche junction | Identical clamping behavior in both directions; no cathode band - symmetric terminal function |
| Lead 1 / Lead 2 | Current path terminals | Leads serve as both electrical interface and primary heat conduction path to PCB; RθJL = 66 °C/W assumes 10 mm lead length |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood applications including engine control, transmission, and ADAS sensor interfaces |
| Glass passivated junction | Ensures ±5% VBR tolerance and stable leakage (<1 μA at VWM) over 1000-hour HTOL testing |
| 400 W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4 kV line-earth) without degradation when mounted on ≥1 oz Cu PCB |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage margin between clamping and protected device's absolute maximum rating |
| UL 94 V-0 molding compound | Meets flammability requirements for enclosed automotive and industrial enclosures |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Interface |
|---|---|
Use Scenario: Protection of 5 V sensor supply lines against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point before LDO regulator input. Use Value: Limits transient excursions to ≤70.1 V, preventing damage to 36 V-rated input stages of TPS7B8x LDOs. |
Use Scenario: Guarding RS-485 transceiver data lines against ESD and inductive kickback from relay coils. IC Role / Device Role / Timing Role: Low-capacitance TVS shunting differential bus lines to ground during 8 kV contact ESD events. Use Value: Sub-ns response preserves signal integrity on 10 Mbps RS-485 links while maintaining <1 μA leakage at 5 V common-mode. |
| Telecom Power Supply Input | Consumer Appliance Mainboard |
Use Scenario: Safeguarding 48 V DC input stage of PoE-powered network switches against lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on bulk input rail, coordinated with MOV and fuse for Class II surge immunity. Use Value: 400 W rating sustains multiple 10/1000 μs surges per IEC 61000-4-5 Ed. 3 without parameter shift. |
Use Scenario: Shielding microcontroller GPIOs connected to front-panel buttons from user-induced ESD. IC Role / Device Role / Timing Role: Localized clamping device mounted within 2 mm of button trace entry to MCU pad. Use Value: 70.1 V clamping prevents latch-up in STM32G030K6T6 I/O cells rated to 5.5 V absolute max. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51CA | DO-214AA package; 600 W PPPM; lower RθJA (50 °C/W); same VBR range and AEC-Q101 grade | Higher power density suitable for space-constrained layouts; requires rework of footprint and thermal relief | Select SMBJ51CA when board area is limited and thermal management via PCB copper is constrained |
| 1.5KE51CA | DO-201AD package; 1500 W PPPM; higher IPPM (33.3 A); same VBR/VC specs; commercial-grade only (no AEC-Q101) | Supports higher-energy transients but lacks automotive qualification and has larger footprint | Choose 1.5KE51CA for industrial AC-input protection where AEC-Q101 is not required and surge energy exceeds 400 W |
Compared with SMBJ51CA and 1.5KE51CA, P4KE51CAHE3/54 offers optimal balance of AEC-Q101 compliance, DO-41 legacy footprint compatibility, and verified 400 W surge handling - making it the preferred choice for cost-sensitive automotive modules requiring drop-in replacement of legacy P4KE series.
Availability
P4KE51CAHE3/54 is available at Aetrix Electronics and suitable for automotive ECU designs, industrial motor drive interfaces, telecom power inputs, and consumer appliance mainboards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P4KE51CAHE3/54 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, and protection devices with emphasis on reliability and automotive-grade validation.
The P4KE series targets cost-effective, high-volume transient suppression in automotive, industrial, and telecom infrastructure - delivering AEC-Q101-qualified robustness in standard DO-41 packaging.
FAQ
What is the breakdown voltage tolerance for P4KE51CAHE3/54?
The P4KE51CAHE3/54 has a specified breakdown voltage range of 48.5 V to 53.6 V at 1 mA test current, representing a ±5% tolerance around the nominal 51 V rating. This tight tolerance ensures predictable clamping onset across production lots and supports reliable coordination with downstream overvoltage protection circuits in automotive applications.
Is P4KE51CAHE3/54 suitable for automotive under-hood use?
Yes, P4KE51CAHE3/54 is AEC-Q101 qualified and rated for junction temperatures up to 175 °C, making it suitable for under-hood automotive applications such as engine control units and transmission control modules. Its glass-passivated junction and JESD 201 Class 2 whisker resistance further ensure reliability in high-vibration, high-temperature environments.
How does the clamping voltage of P4KE51CAHE3/54 compare to its breakdown voltage?
P4KE51CAHE3/54 clamps to 70.1 V at its rated peak pulse current of 5.7 A, yielding a clamping ratio (VC/VBR) of approximately 1.39. This low ratio ensures minimal overvoltage stress on protected components - critical for safeguarding 36 V-rated regulators or 5 V logic interfaces during transient events.
What is the maximum reverse leakage current for P4KE51CAHE3/54 at rated VWM?
At its maximum working voltage of 43.6 V and ambient temperature of 25 °C, P4KE51CAHE3/54 exhibits a maximum reverse leakage current of 1.0 μA. This ultra-low leakage preserves signal integrity on high-impedance sensor lines and minimizes standby power loss in battery-operated systems.
Does P4KE51CAHE3/54 require polarity-aware PCB layout?
No - P4KE51CAHE3/54 is a bidirectional TVS diode with no cathode marking or polarity designation. Its symmetrical construction allows placement in either orientation on the PCB, simplifying layout and eliminating risk of reverse installation during automated assembly.
P4KE51CAHE3/54 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:
- -
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
P4KE51CAHE3/54 FAQ
1.How can I place an order for P4KE51CAHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE51CAHE3/54 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 P4KE51CAHE3/54 reliable?
The price and inventory of P4KE51CAHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE51CAHE3/54 is usually 5 days.
3.What payment methods are accepted for P4KE51CAHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE51CAHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE51CAHE3/54?
P4KE51CAHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE51CAHE3/54 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 P4KE51CAHE3/54?
For technical support, including P4KE51CAHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE51CAHE3/54 requirements.
6.How does Aetrix verify that P4KE51CAHE3/54 is sourced from the original manufacturer or authorized distributors?
All P4KE51CAHE3/54 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 P4KE51CAHE3/54 meets industry standards.
7.What is the process for return or replacement of P4KE51CAHE3/54?
All P4KE51CAHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with P4KE51CAHE3/54, 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 P4KE51CAHE3/54 part is unused and in its original packaging.
Return procedure for P4KE51CAHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KE51CAHE3/54 Tags
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