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Vishay General Semiconductor - Diodes Division P4KE51CHE3/73
- Part No.:
- P4KE51CHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE51CHE3/73.pdf
- Description:
- TVS DIODE 41.3VWM 73.5VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:6,606
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Product details
Overview
P4KE51CHE3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-41 package, designed for circuit-level ESD and surge protection. It features 43.6 V standoff voltage (VWM), 48.5–53.6 V breakdown voltage (VBR) at 1 mA, 70.1 V clamping voltage (VC) at 5.7 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - deployed on power rails and I/O lines of automotive sensor modules.
For engineers reviewing the P4KE51CHE3/73 datasheet, P4KE51CHE3/73 pinout, P4KE51CHE3/73 application, or P4KE51CHE3/73 equivalent, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, thermal resistance (RθJL = 66 °C/W), AEC-Q101 qualification status, and DO-41 lead-form compatibility with legacy through-hole layouts.
Technical Context
This device operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its specified breakdown range. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1 μA at VWM), while the 10/1000 μs surge response enables robust suppression of inductive switching transients and ISO 7637-2 pulse 1/2a/3a events.
Thermal design relies on junction-to-lead resistance (66 °C/W) and 1.5 W steady-state power dissipation at TL = 75 °C. The HE3 suffix confirms AEC-Q101 qualification, including JESD201 Class 2 whisker resistance and extended temperature operation from –55 °C to +175 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43.6 V - maximum continuous reverse operating voltage before conduction begins |
| VBR min/max | 48.5 V / 53.6 V at 1 mA - defines guaranteed avalanche initiation window under production test conditions |
| VC @ IPPM | 70.1 V at 5.7 A - clamped voltage during 10/1000 μs surge, limiting stress on downstream ICs |
| PPPM | 400 W - peak transient energy handling capacity per single 10/1000 μs pulse |
| RθJL | 66 °C/W - junction-to-lead thermal resistance, critical for PCB copper pour sizing and heatsinking |
| TJ max | +175 °C - maximum junction temperature, enabling use in under-hood automotive environments |
Pinout & Package
DO-41 (DO-204AL) molded epoxy package with axial leads; cathode indicated by color band on body. Matte tin-plated leads meet J-STD-002 solderability and JESD 22-B102 durability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to ground or lower-potential rail in unidirectional TVS configuration |
| Cathode | Avalanche conduction terminal | Connected to protected line; color band identifies this end for correct PCB orientation |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures ±5% VBR tolerance and <1 μA IR at VWM across –55 °C to +175 °C |
| 400 W peak pulse power (10/1000 μs) | Withstands automotive load-dump surges up to ISO 7637-2 Pulse 5a without degradation |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive electronics per stress tests including HTOL, TC, UHAST, and mechanical shock |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns rise time), improving protection margin |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12 V battery-fed ECUs exposed to ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 2a (load dump). IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp transients before they reach LDOs or microcontrollers. Use Value: 70.1 V clamping voltage ensures protected ICs rated to 60 V ABS MAX remain within safe operating area during 100 V/50 ms load dump events. | Use Scenario: Analog output lines (4–20 mA) from pressure/temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to shunt ESD (IEC 61000-4-2 ±8 kV contact) and cable-coupled surges. Use Value: Sub-1 μA leakage at 43.6 V VWM prevents signal offset errors in precision current-loop circuits. |
| Consumer Power Adapter Input Stage | Telecom Line Card Surge Protection |
Use Scenario: AC-DC adapter primary-side DC bus subjected to lightning-induced surges via mains input. IC Role / Device Role / Timing Role: Primary clamping device upstream of bridge rectifier and bulk capacitor. Use Value: 400 W PPPM rating supports UL 1449 Type 4 SPD compliance for secondary-side surge suppression. | Use Scenario: RJ-45 Ethernet port on VoIP gateway exposed to induced surges from nearby power cables. IC Role / Device Role / Timing Role: Unidirectional TVS on each differential pair (MDI/MDIX) referenced to chassis ground. Use Value: DO-41 axial form factor allows manual rework and meets IPC-A-610 Class 2 mechanical clearance requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51A | Surface-mount SMB package; same VBR (48.5–53.6 V), lower VC (71.4 V), higher RθJA (50 °C/W) | Requires PCB redesign for SMT placement; better suited for high-density boards with automated assembly | Select when footprint miniaturization and reflow compatibility outweigh through-hole serviceability needs |
| 1.5KE51A | Higher PPPM (1500 W); same DO-41 package; VBR identical; VC = 73.5 V at 15.5 A | Used where higher surge immunity (e.g., industrial motor drives) justifies larger physical size and higher clamping | Choose for applications requiring >400 W single-pulse capability without changing board layout |
Compared with SMBJ51A and 1.5KE51A, P4KE51CHE3/73 offers optimal balance of AEC-Q101 qualification, proven DO-41 reliability in serviceable designs, and precise 70.1 V clamping - making it preferred for automotive replacement modules and field-serviceable industrial controllers where long-term supply continuity and manual repairability are critical.
Availability
P4KE51CHE3/73 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and telecom line-card surge suppression requiring stable component supply across multi-year production cycles.
Supply support for P4KE51CHE3/73 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 P4KE series belongs to Vishay's TRANSZORB® TVS portfolio, engineered specifically for cost-effective, high-energy transient suppression in harsh-environment applications including automotive, industrial control, and communications infrastructure.
FAQ
What does the "HE3" suffix indicate in P4KE51CHE3/73?
The HE3 suffix in P4KE51CHE3/73 denotes RoHS-compliant construction with AEC-Q101 qualification, JESD201 Class 2 whisker resistance, and enhanced reliability testing for automotive applications. This distinguishes it from commercial-grade E3 variants and confirms suitability for under-hood deployment where thermal cycling and vibration endurance are critical. P4KE51CHE3/73 meets all stress requirements defined in AEC-Q101 Rev D.
How does P4KE51CHE3/73 differ from bidirectional P4KE51CA variants?
P4KE51CHE3/73 is unidirectional, with cathode marked by a color band and intended for DC line protection where polarity is fixed. In contrast, P4KE51CA is bidirectional, lacks polarity marking, and suppresses transients in both directions - suitable for AC lines or differential data signals. Their VBR and VC values differ due to internal structure; P4KE51CHE3/73 has VBR = 48.5–53.6 V, while P4KE51CA has symmetric breakdown in both polarities.
Can P4KE51CHE3/73 be used in place of P4KE51A?
Yes - P4KE51CHE3/73 is the AEC-Q101 qualified, RoHS-compliant version of P4KE51A, sharing identical electrical specifications (VWM = 43.6 V, VBR = 48.5–53.6 V, VC = 70.1 V). The HE3 suffix adds automotive qualification and whisker-resistant plating but retains DO-41 mechanical compatibility. P4KE51CHE3/73 may be substituted directly into existing P4KE51A designs where enhanced reliability and compliance are required.
What is the maximum allowable lead temperature during soldering for P4KE51CHE3/73?
The maximum solder dip temperature for P4KE51CHE3/73 is 275 °C for up to 10 seconds, per JESD22-B106. This limit applies to wave or hand-soldering processes. Exceeding this temperature or duration risks delamination of the epoxy molding compound or degradation of the glass-passivated junction. P4KE51CHE3/73 leads are matte tin-plated and fully compliant with J-STD-002 solderability requirements.
Is P4KE51CHE3/73 suitable for protecting USB or CAN bus lines?
No - P4KE51CHE3/73 is not optimized for high-speed data lines like USB or CAN. Its junction capacitance is unspecified in the datasheet, and its 70.1 V clamping voltage far exceeds typical 3.3 V or 5 V bus operating voltages. For such interfaces, low-capacitance TVS arrays (e.g., USBLC6-2SC6 or SM712) with sub-10 V clamping are recommended. P4KE51CHE3/73 is intended for power rail and low-frequency signal protection only.
P4KE51CHE3/73 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:
- -
- 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)
P4KE51CHE3/73 FAQ
1.How can I place an order for P4KE51CHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE51CHE3/73 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 P4KE51CHE3/73 reliable?
The price and inventory of P4KE51CHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE51CHE3/73 is usually 5 days.
3.What payment methods are accepted for P4KE51CHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE51CHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE51CHE3/73?
P4KE51CHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE51CHE3/73 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 P4KE51CHE3/73?
For technical support, including P4KE51CHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE51CHE3/73 requirements.
6.How does Aetrix verify that P4KE51CHE3/73 is sourced from the original manufacturer or authorized distributors?
All P4KE51CHE3/73 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 P4KE51CHE3/73 meets industry standards.
7.What is the process for return or replacement of P4KE51CHE3/73?
All P4KE51CHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with P4KE51CHE3/73, 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 P4KE51CHE3/73 part is unused and in its original packaging.
Return procedure for P4KE51CHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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