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Vishay General Semiconductor - Diodes Division P4KE440A-E3/73
- Part No.:
- P4KE440A-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE440A-E3/73.pdf
- Description:
- TVS DIODE 376VWM 602VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:7,098
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Product details
Overview
P4KE440A-E3/73 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 400 W peak pulse power (10/1000 μs), 376 V stand-off voltage (VWM), 418–462 V breakdown voltage (VBR at 1 mA), and clamps to ≤602 V at 0.66 A peak pulse current. Used in automotive electronics, industrial power supplies, and telecom interface protection.
For engineers reviewing the P4KE440A-E3/73 datasheet, P4KE440A-E3/73 pinout, P4KE440A-E3/73 application, or P4KE440A-E3/73 equivalent, this page delivers verified electrical parameters, thermal derating behavior, bidirectional variant compatibility (P4KE440CA), AEC-Q101 qualification status, and DO-41 mechanical dimensions - all critical for surge protection layout and reliability validation.
Technical Context
This TVS diode operates as a unidirectional clamping device with glass-passivated junction and low incremental surge resistance. Its 10/1000 μs waveform response enables robust suppression of inductive switching spikes and lightning-induced surges up to 400 W without degradation.
Thermal performance is defined by RθJL = 66 °C/W (junction-to-lead) and RθJA = 100 °C/W (junction-to-ambient, LLead = 10 mm). It supports operating junction temperatures from –55 °C to +175 °C and meets JESD 22-B106 solder dip requirements (275 °C max, 10 s).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 376 V - maximum continuous reverse working voltage before clamping initiates |
| VBR min/max | 418 V / 462 V at 1 mA - ensures reliable breakdown within spec across process variation |
| VC @ IPPM | ≤602 V at 0.66 A - clamping voltage limits downstream IC stress during transient events |
| PPPM | 400 W - peak pulse power handling capability per 10/1000 μs standard waveform |
| IFSM | 40 A - non-repetitive forward surge current rating (8.3 ms half-sine) |
| TJ max | +175 °C - high-temperature operation supports under-hood automotive use |
| RθJL | 66 °C/W - enables thermal design margin when mounted to PCB copper pour or heatsink |
Pinout & Package
DO-41 (DO-204AL) molded epoxy package with matte tin-plated leads; cathode indicated by color band on unidirectional devices like P4KE440A-E3/73. Body dimensions: 25.4 mm min length × 5.2 mm max diameter; lead diameter 0.86 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional clamp configuration |
| Cathode (banded end) | Reverse-biased clamping terminal | Connected to protected line (e.g., 376 V rail); conducts only during overvoltage transients |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling |
| AEC-Q101 qualified (HE3 suffix variant) | Validated for automotive-grade stress testing including temperature cycling and HTRB |
| 400 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 Level 4 surge immunity compliance in industrial designs |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD or inductive kick) |
| UL 94 V-0 compliant molding compound | Meets flammability safety requirements for enclosed power supply and telecom equipment |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting 24 V DC power distribution networks in engine control units against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and ground to clamp positive-going surges above 376 V. Use Value: Limits voltage seen by downstream DC-DC converters and microcontrollers to ≤602 V, preventing latch-up or gate oxide damage. | Use Scenario: Shielding digital input channels of programmable logic controllers from field-wiring induced surges. IC Role / Device Role / Timing Role: Standoff-rated TVS on 24 V sensor input lines, absorbing repetitive 10/1000 μs pulses from relay coil switching. Use Value: Maintains signal integrity while enabling >100,000 surge cycles without parameter drift due to glass-passivated junction stability. |
| Telecom Line Interface Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding RS-485 transceivers and Ethernet PHYs connected to external cabling exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device on VCC or data line, coordinated with GDT or MOV secondary protection stages. Use Value: Fast response time (<1 ns) and low capacitance ensure minimal signal distortion on high-speed communication lines. | Use Scenario: Suppressing back-EMF spikes generated by brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Mounted across motor terminals to shunt inductive energy into ground during MOSFET turn-off. Use Value: Withstands 40 A single-pulse surge (8.3 ms) and maintains clamping performance after repeated motor commutation cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ440A | Same VWM (376 V) and VC (602 V), but SMB package (smaller footprint, higher thermal resistance RθJA = 140 °C/W) | Better suited for space-constrained PCBs where leaded DO-41 is impractical | Select SMBJ440A only if board area is limited and thermal management via copper pour is feasible. |
| P4KE440CA | Bidirectional variant with identical VBR range (418–462 V) and same DO-41 package; no polarity marking | Required for AC-coupled or dual-polarity signal lines (e.g., RS-232, audio inputs) | Choose P4KE440CA when protecting symmetric signals or when reverse polarity risk exists in system wiring. |
Compared with SMBJ440A, P4KE440A-E3/73 offers superior thermal dissipation (RθJA = 100 °C/W vs. 140 °C/W) and higher surge robustness in leaded mounting; versus P4KE440CA, it provides directional clamping essential for DC rails where reverse conduction must be blocked.
Availability
P4KE440A-E3/73 is available at Aetrix Electronics and suitable for automotive power systems, industrial PLC interfaces, and telecom infrastructure requiring stable component supply with traceable sourcing and long-lifecycle support.
Supply support for P4KE440A-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, rectifiers, MOSFETs, and protection devices with emphasis on reliability and AEC-Q qualification.
The P4KE series targets cost-effective, high-energy transient suppression in commercial and automotive applications, leveraging DO-41's proven manufacturability and thermal performance for legacy and new designs alike.
FAQ
What is the maximum clamping voltage of P4KE440A-E3/73 under rated surge conditions?
The P4KE440A-E3/73 has a maximum clamping voltage (VC) of 602 V when subjected to its rated peak pulse current (IPPM) of 0.66 A using the standardized 10/1000 μs waveform. This value is guaranteed per Vishay's datasheet (Document Number: 88365, Rev. 16-Sep-2021) and defines the upper voltage limit imposed on protected circuitry during transient events.
Is P4KE440A-E3/73 RoHS-compliant and halogen-free?
Yes, P4KE440A-E3/73 carries the "E3" suffix, indicating full RoHS compliance per EU Directive 2011/65/EU and adherence to Vishay's material categorization standard (www.vishay.com/doc?99912). The molding compound is UL 94 V-0 rated and contains no halogens, making it suitable for environmentally regulated industrial and consumer applications.
Can P4KE440A-E3/73 be used in automotive applications?
The base P4KE440A-E3/73 is commercial-grade; however, the HE3-suffix variant (P4KE440AHE3/73) is AEC-Q101 qualified for automotive use. While P4KE440A-E3/73 shares identical electrical specs and DO-41 packaging, only the HE3 version undergoes extended stress testing required for under-hood deployment. Always verify qualification status via orderable part number.
What is the thermal resistance from junction to ambient for P4KE440A-E3/73?
The typical thermal resistance from junction to ambient (RθJA) for P4KE440A-E3/73 is 100 °C/W, measured with lead length L = 10 mm per JESD 51-2. This value assumes standard PCB mounting without added copper thermal relief; actual performance improves significantly with thermal vias and ground-plane copper pours beneath the cathode/anode pads.
How does P4KE440A-E3/73 differ from P4KE440CA?
P4KE440A-E3/73 is unidirectional with cathode marking, blocking reverse current until breakdown; P4KE440CA is bidirectional, symmetrical in both directions, and lacks polarity marking. Both share identical VWM, VBR, and VC ratings, but P4KE440CA is mandatory for AC signal lines or systems where voltage polarity reversal may occur during fault conditions.
P4KE440A-E3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AL, DO-41, Axial
- Series:
- TransZorb®
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 376V
- Voltage - Breakdown (Min):
- 418V
- Voltage - Clamping (Max) @ Ipp:
- 602V
- Current - Peak Pulse (10/1000µs):
- 660mA
- 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)
P4KE440A-E3/73 FAQ
1.How can I place an order for P4KE440A-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE440A-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 P4KE440A-E3/73 reliable?
The price and inventory of P4KE440A-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 P4KE440A-E3/73 is usually 5 days.
3.What payment methods are accepted for P4KE440A-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE440A-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE440A-E3/73?
P4KE440A-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE440A-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 P4KE440A-E3/73?
For technical support, including P4KE440A-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE440A-E3/73 requirements.
6.How does Aetrix verify that P4KE440A-E3/73 is sourced from the original manufacturer or authorized distributors?
All P4KE440A-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 P4KE440A-E3/73 meets industry standards.
7.What is the process for return or replacement of P4KE440A-E3/73?
All P4KE440A-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with P4KE440A-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 P4KE440A-E3/73 part is unused and in its original packaging.
Return procedure for P4KE440A-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KE440A-E3/73 Tags
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