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Vishay General Semiconductor - Diodes Division P4KE440-E3/73
- Part No.:
- P4KE440-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE440-E3/73.pdf
- Description:
- TVS DIODE 356VWM 631VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:2,754
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Product details
Overview
P4KE440-E3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-41 package, designed to clamp voltage transients up to 602 A peak pulse current (10/1000 μs), with 400 W peak pulse power rating, 376 V stand-off voltage (VWM), and 462 V maximum breakdown voltage (VBR). It protects MOSFETs, ICs, and sensor signal lines in industrial power supplies and automotive control units.
For engineers reviewing the P4KE440-E3/73 datasheet, P4KE440-E3/73 pinout, P4KE440-E3/73 application, or P4KE440-E3/73 equivalent, key selection criteria include clamping voltage (602 V at IPPM), thermal resistance (66 °C/W junction-to-lead), AEC-Q101 qualification status, and DO-41 mechanical compatibility with legacy through-hole layouts.
Technical Context
This device operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 418–462 V breakdown range at 1 mA test current. Its glass-passivated junction ensures stable VBR tolerance (±5 %) and low incremental surge resistance for consistent clamping under repetitive transients.
Designed for 10/1000 μs waveform compliance, it delivers 400 W peak pulse power with 0.01 % duty cycle, derating linearly above 25 °C ambient per Fig. 2. The 66 °C/W RθJL enables effective heat dissipation into PCB copper or lead frame without heatsinking in typical 1–2 s transient events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 376 V - Maximum continuous reverse operating voltage before conduction begins; defines safe working margin below breakdown. |
| VBR min/max | 418 V / 462 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on across production lots. |
| VC at IPPM | 602 V - Clamped voltage during 602 A transient; determines maximum stress imposed on protected downstream circuitry. |
| PPPM | 400 W - Peak pulse power handling with 10/1000 μs waveform; defines transient energy absorption capability. |
| RθJL | 66 °C/W - Junction-to-lead thermal resistance; enables thermal design using lead-frame conduction rather than PCB copper area. |
| TJ max | +175 °C - Maximum junction temperature; supports operation in under-hood automotive and high-ambient industrial environments. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per JESD22 standards. |
Pinout & Package
DO-41 (DO-204AL) molded epoxy package with axial leads; matte tin-plated terminals solderable per J-STD-002; cathode indicated by color band on unidirectional variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path / low-side reference | Connected to ground or low-voltage rail in unidirectional protection configuration; carries full surge current during clamping. |
| Cathode | Reverse-biased clamping node | Connected to protected line (e.g., 376 V bus); initiates avalanche conduction when transient exceeds VWM. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures ±5 % VBR tolerance and long-term stability under thermal cycling and humidity exposure. |
| 400 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 Level 4 surge immunity (4 kV line-earth) in single-stage protection designs. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain and body electronics where failure modes must meet ISO 26262 ASIL-B readiness. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), improving protection fidelity for sensitive gate drivers. |
| UL 94 V-0 molding compound | Meets flammability requirements for enclosed industrial enclosures and EV battery management system housings. |
Applications
| Industrial Power Supply Protection | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protecting 380 V DC link in switch-mode power supplies against inductive kickback from contactor switching. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient spikes on high-voltage rail to prevent overvoltage damage to PWM controllers and gate drivers. Use Value: 376 V VWM allows safe operation near nominal DC bus while 602 V clamping limits stress on 650 V rated MOSFETs to within SOA limits. |
Use Scenario: Safeguarding CAN transceiver supply pins against load-dump transients in 12 V automotive systems. IC Role / Device Role / Timing Role: Standoff protection element absorbing 400 W surges induced by alternator regulation failure or battery disconnect events. Use Value: AEC-Q101 qualification and 175 °C TJ max ensure reliable operation in under-hood ECUs exposed to ambient temperatures up to 125 °C. |
| Telecom AC/DC Front-End | Sensor Signal Line Protection |
Use Scenario: Shielding AC-input rectifier stage of telecom power supplies from lightning-induced surges on mains input. IC Role / Device Role / Timing Role: Primary-level transient suppressor placed after MOV but before bridge rectifier to limit let-through voltage. Use Value: 400 W rating and 602 V clamping enable coordination with upstream Class II MOVs to achieve <1.5 kV residual voltage at 10 kA. |
Use Scenario: Guarding analog output lines of pressure sensors in factory automation against ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance (typ. <100 pF) unidirectional clamp on 24 V sensor supply rail to preserve signal integrity. Use Value: Fast response time (<1 ns) and 376 V standoff prevent false triggering during normal 24 V operation while suppressing >8 kV HBM ESD pulses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ400A | DO-214AA package; 400 V VWM; 436–482 V VBR; 600 V VC at 550 A; surface-mount only. | Requires PCB rework for SMT layout; lacks AEC-Q101 qualification; higher clamping voltage reduces margin for 650 V MOSFETs. | Select when board space is constrained and through-hole assembly is unavailable; verify thermal relief pad design for 1.5 W steady-state dissipation. |
| 1.5KE440A | DO-201AD package; same VWM/VBR specs; 400 W rating; 602 V VC; lead-free, commercial grade only (no AEC-Q101). | Larger DO-201AD footprint increases board area; no automotive qualification; identical electrical performance in non-automotive use cases. | Prefer for cost-sensitive industrial applications where AEC-Q101 is not mandated and DO-41 footprint is not required. |
Compared with SMBJ400A and 1.5KE440A, P4KE440-E3/73 uniquely combines DO-41 through-hole compatibility, AEC-Q101 qualification, and precise 376 V VWM for 400 V-class systems-making it optimal for automotive and legacy industrial designs requiring drop-in replacement and extended temperature reliability.
Availability
P4KE440-E3/73 is available at Aetrix Electronics and suitable for industrial power supplies, automotive engine control units, and telecom front-end protection requiring stable component supply across multi-year production cycles.
Supply support for P4KE440-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and ruggedized packaging.
The P4KE series targets high-energy transient suppression in harsh environments, with design focus on automotive, industrial, and telecom infrastructure where long-term parametric stability and surge survivability are critical.
FAQ
What is the clamping voltage of P4KE440-E3/73 at its rated peak pulse current?
The P4KE440-E3/73 has a maximum clamping voltage (VC) of 602 V when subjected to its rated peak pulse current of 602 A under the standard 10/1000 μs waveform. This value is measured at the instant the current reaches its peak and defines the upper voltage limit imposed on protected circuitry during a surge event. The P4KE440-E3/73 maintains this clamping performance across its qualified operating temperature range.
Is P4KE440-E3/73 suitable for automotive applications?
Yes, P4KE440-E3/73 is AEC-Q101 qualified, confirming its reliability for automotive use including engine control units, body electronics, and powertrain modules. Its 175 °C maximum junction temperature, robust glass-passivated junction, and validated performance under temperature cycling and humidity testing make it appropriate for under-hood and cabin-mounted systems. The P4KE440-E3/73 meets automotive-grade surge immunity requirements when applied per Vishay's recommended layout guidelines.
What does the "E3/73" suffix indicate in P4KE440-E3/73?
The "E3" suffix denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads meeting J-STD-002 solderability and JESD 201 class 1A whisker resistance. The "/73" indicates packaging in 73 mm tape-and-reel format per Vishay's ordering convention, typically containing 5500 units per reel. This distinguishes P4KE440-E3/73 from variants like P4KE440AHE3/54 (AEC-Q101 qualified) or P4KE440CA (bidirectional version).
How does P4KE440-E3/73 differ from bidirectional P4KE440CA?
P4KE440-E3/73 is unidirectional, with polarity marked by a cathode band and intended for DC line protection where reverse conduction is not required. In contrast, P4KE440CA is bidirectional, lacking polarity marking and capable of clamping transients in both directions-suitable for AC lines or differential signal pairs. Their VBR, VWM, and VC values differ: P4KE440CA has symmetric 418–462 V breakdown in both directions, while P4KE440-E3/73 specifies these parameters only for reverse bias.
What is the thermal resistance of P4KE440-E3/73, and how does it affect layout?
P4KE440-E3/73 has a typical junction-to-lead thermal resistance (RθJL) of 66 °C/W, meaning each watt of power dissipated raises the junction temperature 66 °C above the lead temperature. This allows effective heat transfer via the axial leads into PCB copper pours or chassis connections-eliminating need for large thermal pads. Layout should maintain ≥10 mm lead length for accurate RθJA modeling and avoid excessive solder mask coverage on leads to preserve thermal conduction paths for the P4KE440-E3/73.
P4KE440-E3/73 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 356V
- Voltage - Breakdown (Min):
- 396V
- Voltage - Clamping (Max) @ Ipp:
- 631V
- Current - Peak Pulse (10/1000µs):
- 630mA
- 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)
P4KE440-E3/73 FAQ
1.How can I place an order for P4KE440-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE440-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 P4KE440-E3/73 reliable?
The price and inventory of P4KE440-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 P4KE440-E3/73 is usually 5 days.
3.What payment methods are accepted for P4KE440-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE440-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE440-E3/73?
P4KE440-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE440-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 P4KE440-E3/73?
For technical support, including P4KE440-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE440-E3/73 requirements.
6.How does Aetrix verify that P4KE440-E3/73 is sourced from the original manufacturer or authorized distributors?
All P4KE440-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 P4KE440-E3/73 meets industry standards.
7.What is the process for return or replacement of P4KE440-E3/73?
All P4KE440-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with P4KE440-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 P4KE440-E3/73 part is unused and in its original packaging.
Return procedure for P4KE440-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KE440-E3/73 Tags
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