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Vishay General Semiconductor - Diodes Division P4KE39CA-E3/73
- Part No.:
- P4KE39CA-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE39CA-E3/73.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:9,283
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Product details
Overview
P4KE39CA-E3/73 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode in DO-41 package, designed for clamping voltage transients on signal or power lines. It features a 33.3 V stand-off voltage (VWM), 37.1–41.0 V breakdown voltage (VBR) at 1 mA, 53.9 V maximum clamping voltage (VC) at 7.4 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive sensor protection and industrial I/O interface surge suppression.
For engineers reviewing the P4KE39CA-E3/73 datasheet, P4KE39CA-E3/73 pinout, P4KE39CA-E3/73 application, or P4KE39CA-E3/73 equivalent, this page delivers verified electrical parameters, DO-41 terminal mapping, bidirectional clamping behavior, AEC-Q101 qualification status, and direct alternatives for ESD/lightning transient protection in 24 V control systems, CAN bus interfaces, and DC power rail conditioning.
Technical Context
The P4KE39CA-E3/73 operates as a bidirectional avalanche diode, symmetrically clamping positive and negative transients above its breakdown threshold without polarity marking. Its glass-passivated junction enables fast response (<1 ns), low incremental surge resistance, and stable VBR temperature coefficient of +0.100 %/°C.
Rated for 400 W peak pulse power (10/1000 μs), it sustains repetitive surges at 0.01 % duty cycle and derates linearly above 25 °C ambient, with thermal resistance RθJA = 100 °C/W and RθJL = 66 °C/W - enabling use in compact PCB layouts without forced cooling in industrial motor drives and automotive body electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33.3 V - maximum continuous reverse working voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR min/max | 37.1 V / 41.0 V at 1 mA - guaranteed avalanche onset range; ensures consistent turn-on across production lots and temperature. |
| VC @ IPPM | 53.9 V at 7.4 A - clamped voltage during 10/1000 μs surge; determines protected circuit's maximum transient exposure level. |
| PPPM | 400 W - peak transient energy handling capacity; supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge immunity in 24 V systems. |
| ID @ VWM | 1.0 μA - reverse leakage at stand-off voltage; negligible power loss and signal distortion in high-impedance sensor lines. |
| TJ max | +175 °C - maximum junction temperature; enables operation in under-hood automotive environments and sealed industrial enclosures. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per JESD47. |
Pinout & Package
Package: DO-41 (DO-204AL), axial-leaded, molded epoxy case meeting UL 94 V-0; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. Bidirectional construction has no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Identical avalanche behavior in both directions; terminals interchangeable in PCB layout - no orientation dependency. |
| Lead 1 / Lead 2 | Thermal and electrical interface | Leads serve as primary heat dissipation path (RθJL = 66 °C/W); 10 mm lead length required for rated PD = 1.5 W at TL = 75 °C. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables <1 ns response time and stable long-term VBR drift (<±5 % over 1000 hrs at TJ = 125 °C). |
| 400 W peak pulse power (10/1000 μs) | Supports repeated lightning-induced surges in telecom line cards and industrial PLC analog inputs without degradation. |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules, ADAS camera power rails, and infotainment USB ports. |
| Low clamping ratio (VC/VBR ≈ 1.41) | Minimizes overvoltage stress on downstream MOSFETs or microcontrollers during 1 kV EFT bursts. |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker test; suitable for lead-free reflow and high-reliability medical equipment. |
Applications
| Automotive Sensor Protection | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting 5 V or 24 V supply lines feeding ABS wheel speed sensors exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping device placed between sensor VCC and GND, shunting transients before they reach ASIC front-end. Use Value: Limits transient voltage to ≤53.9 V during 10/1000 μs surges, preserving sensor IC integrity while maintaining <1 μA leakage at nominal 24 V operation. |
Use Scenario: Safeguarding 4–20 mA current loop inputs against field wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Parallel-connected TVS across input terminals, activated only during >33.3 V excursions to avoid interfering with normal loop calibration. Use Value: Clamps 1 kV/500 Ω surge to 53.9 V within nanoseconds, preventing op-amp saturation and ADC latch-up in precision measurement circuits. |
| CAN Bus Power Line Conditioning | DC Power Rail Surge Suppression |
Use Scenario: Secondary protection on 12 V CAN transceiver VCC rail alongside primary LC filtering in vehicle gateway ECUs. IC Role / Device Role / Timing Role: Fast-acting clamp absorbing residual energy after common-mode chokes and ferrites attenuate bulk surge energy. Use Value: Withstands 400 W peak pulses without parametric shift, ensuring CAN communication remains functional after repeated 10/1000 μs transients per ISO 16750-2. |
Use Scenario: Standoff protection on 24 V DC power entry of industrial HMIs subjected to switching transients from nearby contactors. IC Role / Device Role / Timing Role: Primary overvoltage limiter placed directly at connector, conducting surge current away from downstream DC/DC converters. Use Value: Delivers 7.4 A peak pulse current capability at 53.9 V clamping, limiting voltage overshoot to safe levels for 36 V-rated input capacitors and regulators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA | DO-214AA package; 33 V VWM; 53.3 V VC @ 7.5 A; 600 W PPPM; lower RθJA (50 °C/W) but larger footprint. | Better thermal performance in high-density layouts; requires PCB pad redesign due to SMD footprint vs. axial DO-41. | Select when board space allows surface-mount integration and higher surge repetition rate is needed. |
| 1.5KE39CA | DO-201AD package; same VWM/VBR/VC specs; 1500 W PPPM; higher IFSM (200 A); larger case size and weight. | Higher single-pulse energy absorption; suited for primary-level protection in AC/DC front-ends or telecom power supplies. | Choose for first-stage surge defense where 400 W is insufficient and through-hole mounting is acceptable. |
Compared with SMBJ33CA and 1.5KE39CA, the P4KE39CA-E3/73 offers optimal balance of compact DO-41 form factor, AEC-Q101 qualification, and 400 W surge handling - making it ideal for secondary protection in space-constrained automotive and industrial control modules where axial lead compatibility and RoHS/E3 compliance are mandatory.
Availability
P4KE39CA-E3/73 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC analog inputs, and CAN bus power conditioning requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for P4KE39CA-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 passive components with emphasis on reliability, power efficiency, and automotive-grade qualification.
The P4KE39CA-E3/73 belongs to Vishay's TRANSZORB® TVS family, engineered specifically for robust, bidirectional transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure modes must be mitigated without compromising signal integrity.
FAQ
What is the clamping voltage of the P4KE39CA-E3/73 under a standard 10/1000 μs surge?
The P4KE39CA-E3/73 exhibits a maximum clamping voltage (VC) of 53.9 V when subjected to its rated peak pulse current of 7.4 A using the 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88365 and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the P4KE39CA-E3/73 suitable for automotive applications?
Yes, the P4KE39CA-E3/73 is AEC-Q101 qualified and explicitly listed in Vishay's automotive-grade product offering. Its DO-41 package, 175 °C maximum junction temperature, and validation across temperature cycling, HTRB, and ESD tests make it appropriate for under-hood and cabin applications such as engine control sensors, body control modules, and infotainment power rails - provided layout adheres to thermal derating curves in the datasheet.
How does the bidirectional design of the P4KE39CA-E3/73 affect PCB layout?
The P4KE39CA-E3/73 has no polarity marking and identical electrical behavior in both directions, so PCB layout requires no orientation alignment - either lead may connect to VCC or GND. This simplifies placement in differential or AC-coupled lines like CAN or RS-485, eliminates risk of reverse installation, and avoids need for silkscreen polarity indicators - reducing assembly errors and test overhead in high-volume manufacturing.
What is the maximum steady-state power dissipation of the P4KE39CA-E3/73?
The P4KE39CA-E3/73 has a maximum DC power dissipation (PD) of 1.5 W when mounted on an infinite heatsink at lead temperature (TL) of 75 °C. At ambient temperatures above 25 °C, this rating must be derated per Figure 5 in Vishay document 88365 - for example, to ~1.0 W at TA = 75 °C - ensuring junction temperature stays within the 175 °C limit during continuous reverse-bias leakage conditions.
Does the P4KE39CA-E3/73 meet RoHS and lead-free assembly requirements?
Yes, the "E3" suffix in P4KE39CA-E3/73 indicates full RoHS compliance per EU Directive 2011/65/EU and JESD 201 Class 1A whisker testing. Its matte tin-plated leads are compatible with lead-free reflow profiles (peak 260 °C), and the molding compound meets UL 94 V-0 flammability - satisfying environmental and safety mandates for medical, industrial, and consumer electronics produced for global markets.
P4KE39CA-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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 7.4A
- 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)
P4KE39CA-E3/73 FAQ
1.How can I place an order for P4KE39CA-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE39CA-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 P4KE39CA-E3/73 reliable?
The price and inventory of P4KE39CA-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 P4KE39CA-E3/73 is usually 5 days.
3.What payment methods are accepted for P4KE39CA-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE39CA-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE39CA-E3/73?
P4KE39CA-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE39CA-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 P4KE39CA-E3/73?
For technical support, including P4KE39CA-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE39CA-E3/73 requirements.
6.How does Aetrix verify that P4KE39CA-E3/73 is sourced from the original manufacturer or authorized distributors?
All P4KE39CA-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 P4KE39CA-E3/73 meets industry standards.
7.What is the process for return or replacement of P4KE39CA-E3/73?
All P4KE39CA-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with P4KE39CA-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 P4KE39CA-E3/73 part is unused and in its original packaging.
Return procedure for P4KE39CA-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KE39CA-E3/73 Tags
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