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Vishay General Semiconductor - Diodes Division P4KE39CAHE3/54
- Part No.:
- P4KE39CAHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE39CAHE3/54.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:2,262
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Product details
Overview
P4KE39CAHE3/54 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 circuits.
For engineers reviewing the P4KE39CAHE3/54 datasheet, P4KE39CAHE3/54 pinout, P4KE39CAHE3/54 application, or P4KE39CAHE3/54 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, DO-41 mechanical compatibility, thermal resistance (RθJL = 66 °C/W), and compliance with IEC 61000-4-2/4-4/4-5 surge immunity requirements.
Technical Context
This TVS diode operates symmetrically in both polarities due to its bidirectional construction, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1 μA at VWM), while the 10/1000 μs surge response supports robust handling of inductive switching transients and ESD events.
The device is rated for continuous operation from –55 °C to +175 °C junction temperature, with thermal derating starting above 25 °C ambient. Its 1.5 W steady-state power dissipation (PD) and 66 °C/W junction-to-lead thermal resistance allow direct PCB mounting without heatsinking for typical transient duty cycles (≤0.01%).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33.3 V - Maximum continuous reverse voltage before conduction; defines operating margin below clamping threshold. |
| VBR min/max | 37.1 V / 41.0 V at 1 mA - Confirmed breakdown range ensuring reliable turn-on during overvoltage events. |
| VC @ IPPM | 53.9 V at 7.4 A - Clamped voltage seen by protected circuit under 10/1000 μs surge; limits stress on downstream ICs. |
| PPPM | 400 W - Peak transient energy absorption capacity per single 10/1000 μs pulse; meets IEC 61000-4-5 Level 3. |
| TJ max | +175 °C - Maximum junction temperature; enables use in under-hood automotive and high-ambient industrial environments. |
| RθJL | 66 °C/W - Junction-to-lead thermal resistance; determines safe power dissipation without forced cooling. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
Pinout & Package
DO-41 (DO-204AL) molded epoxy package with matte tin-plated leads; no polarity marking for bidirectional configuration; RoHS-compliant and JESD 201 Class 2 whisker tested (HE3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | Both terminals function identically; no cathode band - enables placement in AC or floating signal paths without orientation check. |
| Lead 1 / Lead 2 | Current path during clamping | Leads conduct surge current bidirectionally; must be routed with low-inductance traces to minimize VC overshoot. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures ±5% VBR tolerance and <1 μA ID at VWM across –55 °C to +175 °C, critical for precision clamping stability. |
| 400 W peak pulse power (10/1000 μs) | Supports repeated surge events in industrial motor drives and automotive power distribution without degradation. |
| AEC-Q101 qualification | Validates suitability for automotive body electronics, sensor modules, and infotainment power rails per stress test requirements. |
| UL 94 V-0 molding compound | Prevents flame propagation in enclosed enclosures - required for industrial control cabinet and EV charging system approvals. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a), improving protection margin for 3.3 V/5 V logic. |
Applications
| Automotive Sensor Protection | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and MEMS pressure sensors from load dump and ESD in engine control units. IC Role / Device Role / Timing Role: Bidirectional clamping element placed at connector interface to shunt transients before reaching signal conditioning ICs. Use Value: Maintains 33.3 V stand-off while clamping to 53.9 V - preserves signal integrity for 5 V rail sensors and avoids false triggering of fault detection. |
Use Scenario: Safeguarding 4–20 mA current loop inputs in programmable logic controllers against field wiring surges and ground bounce. IC Role / Device Role / Timing Role: Primary transient suppressor across input terminals, operating in parallel with precision shunt regulators. Use Value: Withstands 400 W pulses without degradation, enabling >100,000 surge cycles in factory automation environments per IEC 61000-4-4. |
| Telecom Line Interface | Consumer Appliance Power Supply |
Use Scenario: Shielding Ethernet PHY magnetics and PoE injectors from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-stage protector on secondary side of isolation transformer, coordinated with GDT and MOV stages. Use Value: Fast response (<1 ns) and symmetric clamping ensure balanced differential mode suppression without skewing signal timing. |
Use Scenario: Suppressing switch-mode power supply (SMPS) turn-off spikes and ESD on AC input rectifier bridges in washing machines and HVAC controls. IC Role / Device Role / Timing Role: Secondary-level TVS across bridge output or DC bus, complementing primary X/Y-capacitor filtering. Use Value: 175 °C TJ rating allows placement near hot SMPS transformers without thermal derating penalties. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36CA | DO-214AA package; 36 V VWM; 58.1 V VC @ 6.9 A; same 400 W PPPM but lower RθJA (50 °C/W). | Better thermal performance in high-density layouts; requires SMT reflow vs. through-hole assembly. | Select when board space is constrained and automated assembly is preferred over manual soldering. |
| 1.5KE39CA | Same DO-41 package; identical VWM/VBR/VC specs; higher 1500 W PPPM (10/1000 μs); larger physical size and 2.5 W PD. | Higher energy handling for infrequent but severe surges (e.g., utility grid coupling); not AEC-Q101 qualified. | Choose for non-automotive industrial mains protection where surge repetition is rare and qualification is not mandated. |
Compared with SMBJ36CA and 1.5KE39CA, P4KE39CAHE3/54 offers AEC-Q101 qualification and DO-41 through-hole compatibility at 400 W rating - making it optimal for cost-sensitive, automotive-qualified designs requiring proven mechanical robustness and legacy assembly support.
Availability
P4KE39CAHE3/54 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC analog inputs, and telecom line protection requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for P4KE39CAHE3/54 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive qualification.
The P4KE39CAHE3/54 belongs to Vishay's TRANSZORB® TVS family - engineered specifically for robust, bidirectional transient suppression in harsh environments including automotive, industrial, and telecom infrastructure.
FAQ
What is the clamping voltage of P4KE39CAHE3/54 and how does it protect downstream circuits?
The P4KE39CAHE3/54 has a maximum clamping voltage (VC) of 53.9 V at 7.4 A peak pulse current (10/1000 μs). This value represents the highest voltage imposed on the protected line during a surge event. By limiting transient voltage to this level, the P4KE39CAHE3/54 prevents overvoltage damage to downstream ICs such as microcontrollers, transceivers, or analog front-ends rated for ≤60 V absolute maximum ratings. Its low incremental resistance ensures minimal overshoot beyond VC.
Is P4KE39CAHE3/54 suitable for automotive applications?
Yes, P4KE39CAHE3/54 is AEC-Q101 qualified and manufactured with JESD 201 Class 2 whisker-resistant plating (HE3 suffix). It operates reliably from –55 °C to +175 °C and meets automotive surge immunity standards including ISO 7637-2 and IEC 61000-4-5. Its bidirectional symmetry makes it ideal for protecting LIN/CAN bus nodes, sensor signal lines, and power distribution networks in engine control, body electronics, and ADAS subsystems.
How does the DO-41 package of P4KE39CAHE3/54 affect thermal performance?
The DO-41 (DO-204AL) package of P4KE39CAHE3/54 provides a typical junction-to-lead thermal resistance (RθJL) of 66 °C/W and junction-to-ambient (RθJA) of 100 °C/W with 10 mm lead length. This allows direct mounting on standard FR-4 PCBs without heatsinks for intermittent surge duty cycles (≤0.01%). For sustained high-power transients, minimizing lead length and using copper pour under the body improves heat dissipation - verified in Vishay's Fig. 5 derating curve.
What is the difference between P4KE39CAHE3/54 and unidirectional P4KE39AHE3/54?
P4KE39CAHE3/54 is bidirectional with symmetrical clamping in both polarities and no cathode marking, whereas P4KE39AHE3/54 is unidirectional with a cathode band and conducts only in reverse bias. The CA version supports AC-coupled or floating signal lines (e.g., differential buses), while the A version suits DC power rails or single-polarity data lines. Both share identical VWM (33.3 V), VBR (37.1–41.0 V), and VC (53.9 V), but only the CA variant guarantees performance in either direction.
Does P4KE39CAHE3/54 require external series impedance for optimal protection?
Yes, P4KE39CAHE3/54 should be used with a series current-limiting resistor or ferrite bead upstream to reduce peak current demand during clamping. Without impedance, the 7.4 A IPPM may exceed trace or connector ratings. Typical design practice places the P4KE39CAHE3/54 within 2–3 mm of the protected port, with series impedance selected to limit current to <5 A while maintaining system response time - validated via SPICE simulation using the device's dynamic resistance model.
P4KE39CAHE3/54 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):
- 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:
- -
- 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)
P4KE39CAHE3/54 FAQ
1.How can I place an order for P4KE39CAHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE39CAHE3/54 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 P4KE39CAHE3/54 reliable?
The price and inventory of P4KE39CAHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE39CAHE3/54 is usually 5 days.
3.What payment methods are accepted for P4KE39CAHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE39CAHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE39CAHE3/54?
P4KE39CAHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE39CAHE3/54 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 P4KE39CAHE3/54?
For technical support, including P4KE39CAHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE39CAHE3/54 requirements.
6.How does Aetrix verify that P4KE39CAHE3/54 is sourced from the original manufacturer or authorized distributors?
All P4KE39CAHE3/54 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 P4KE39CAHE3/54 meets industry standards.
7.What is the process for return or replacement of P4KE39CAHE3/54?
All P4KE39CAHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with P4KE39CAHE3/54, 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 P4KE39CAHE3/54 part is unused and in its original packaging.
Return procedure for P4KE39CAHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KE39CAHE3/54 Tags
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