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Vishay General Semiconductor - Diodes Division P4KE24HE3/73
- Part No.:
- P4KE24HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE24HE3/73.pdf
- Description:
- TVS DIODE 19.4VWM 34.7VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:3,509
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Product details
Overview
P4KE24HE3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-41 package, designed for circuit protection against ESD and voltage transients. It features 22.8 V to 25.2 V breakdown voltage (VBR), 20.5 V maximum standoff voltage (VWM), 400 W peak pulse power (10/1000 μs), 12.0 A peak pulse current (IPPM), and clamps to ≤33.2 V at rated surge. It is AEC-Q101 qualified and used to protect MOSFETs and sensor signal lines in automotive power electronics.
For engineers reviewing the P4KE24HE3/73 datasheet, P4KE24HE3/73 pinout, P4KE24HE3/73 application, or P4KE24HE3/73 equivalent, key selection criteria include its unidirectional polarity, DO-41 mechanical form factor, 175 °C max junction temperature, 1.0 mA test current for VBR, and compliance with JESD 201 Class 2 whisker resistance - critical for under-hood automotive designs requiring long-term reliability.
Technical Context
This device operates as a clamping-type overvoltage protector: when reverse voltage exceeds VWM (20.5 V), it avalanches at VBR (22.8–25.2 V) and limits transient energy by diverting surge current to ground. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response time (<1 ns), enabling effective suppression of ESD (IEC 61000-4-2) and inductive switching spikes.
The P4KE24HE3/73 is thermally rated for 1.5 W steady-state dissipation on infinite heatsink at TL = 75 °C, with RθJL = 66 °C/W and RθJA = 100 °C/W. Its 40 A IFSM (8.3 ms half-sine) supports robust handling of repetitive load-dump events in 12 V automotive systems without degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 22.8 V / 25.2 V at 1.0 mA - defines precise avalanche onset window for predictable clamping threshold |
| VWM | 20.5 V - maximum continuous reverse operating voltage before leakage rises above 1.0 μA |
| VC @ IPPM | ≤33.2 V at 12.0 A - clamped voltage during 10/1000 μs surge, limiting stress on downstream ICs |
| PPPM | 400 W - peak transient power handling capability per single 10/1000 μs pulse at 0.01% duty cycle |
| IFSM | 40 A - non-repetitive forward surge rating (8.3 ms half-sine), critical for automotive load-dump immunity |
| TJ max. | +175 °C - enables operation in high-temperature engine-bay environments without derating |
| Package | DO-41 (DO-204AL) - industry-standard axial-leaded package with UL 94 V-0 epoxy body |
Pinout & Package
DO-41 (DO-204AL) molded epoxy package with matte tin-plated leads; cathode indicated by color band on body; lead length ≥9.5 mm for thermal derating compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to system ground or low-side return; carries surge current during clamping |
| Cathode | Avalanche junction terminal | Connected to protected line (e.g., battery rail or sensor input); color-banded end identifies polarity |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Ensures stable VBR tolerance (±5%) and low leakage (<1.0 μA) across temperature and lifetime |
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, humidity bias, and mechanical shock |
| 400 W peak pulse power (10/1000 μs) | Provides sufficient energy absorption for ISO 7637-2 Pulse 1/2a/5a transients in 12 V systems |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for 3.3 V/5 V logic |
| JESD 201 Class 2 whisker resistance | Prevents tin whisker growth under thermal stress, ensuring long-term solder joint integrity in automotive ECUs |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed control modules from load-dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC input, clamping surges before they reach regulator ICs. Use Value: With VC ≤33.2 V and IPPM = 12.0 A, P4KE24HE3/73 prevents overvoltage damage to 36 V-rated input regulators while surviving repeated 40 V/100 ms events. | Use Scenario: Shielding analog sensor outputs (e.g., pressure or temperature sensors) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: TVS mounted at connector entry point, shunting transients before signal conditioning op-amps or ADC inputs. Use Value: Sub-1 ns response and <1.0 μA leakage at 20.5 V preserve signal integrity and offset accuracy in 16-bit measurement systems. |
| Consumer Power Adapter Input | Telecom Line Interface Protection |
Use Scenario: Safeguarding AC-DC adapter primary-side rectifiers and controllers against lightning-induced surges on mains input. IC Role / Device Role / Timing Role: Placed across bridge rectifier output to clamp differential-mode transients before bulk capacitor and PWM controller. Use Value: 400 W peak power and 175 °C TJ max allow reliable operation in enclosed, thermally constrained adapters without active cooling. | Use Scenario: Protecting RS-485 transceivers and PHY interfaces from induced surges on long-wire fieldbus installations. IC Role / Device Role / Timing Role: Unidirectional TVS on each data line (A/B) referenced to common-mode ground, suppressing common-mode transients. Use Value: Low clamping voltage (33.2 V) ensures transceiver I/O remains within absolute maximum ratings even during 1 kV/μs fast transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A | Surface-mount SMB package (vs. axial DO-41); same VBR range (22.8–25.2 V) but lower PPPM = 600 W | Designed for automated SMT assembly; unsuitable for through-hole or high-vibration mechanical mounting | Select SMBJ24A only when board space is constrained and reflow compatibility is required |
| 1.5KE24A | Higher PPPM = 1500 W; same DO-41 package and VBR; larger junction capacitance (≈150 pF vs. ≈50 pF) | Better suited for high-energy industrial transients but may degrade high-speed signal integrity | Choose 1.5KE24A where surge energy exceeds 400 W but signal bandwidth is not critical |
Compared with SMBJ24A and 1.5KE24A, the P4KE24HE3/73 offers optimal balance of AEC-Q101 qualification, DO-41 mechanical robustness, and 400 W surge capacity - making it the preferred choice for cost-sensitive, through-hole automotive and industrial power rail protection where moderate energy handling suffices.
Availability
P4KE24HE3/73 is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, and telecom line interface applications requiring stable component supply, long-lifecycle support, and AEC-Q101 compliance.
Supply support for P4KE24HE3/73 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 P4KE24HE3/73 belongs to Vishay's TRANSZORB® TVS family, engineered specifically for robust, standardized transient suppression in harsh environments - particularly automotive, industrial, and telecom infrastructure where repeatable clamping performance and long-term stability are mandatory.
FAQ
What is the breakdown voltage tolerance for P4KE24HE3/73?
The P4KE24HE3/73 has a specified breakdown voltage range of 22.8 V to 25.2 V at 1.0 mA test current, corresponding to a ±5% tolerance around the nominal 24 V rating. This tight VBR window ensures consistent clamping behavior across production lots and supports reliable design margining in 24 V system protection circuits.
Is P4KE24HE3/73 suitable for bidirectional transient suppression?
No, P4KE24HE3/73 is a unidirectional TVS diode - it conducts only in reverse bias above VBR and blocks forward current up to its rated IFSM. For bidirectional protection, Vishay specifies the CA-suffix variant (e.g., P4KE24CA). Using P4KE24HE3/73 in AC-coupled or symmetrical surge scenarios would require external circuitry to manage forward conduction.
What does the "HE3" suffix indicate in P4KE24HE3/73?
The "HE3" suffix denotes RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance. Unlike the "E3" commercial-grade variant, HE3-certified P4KE24HE3/73 undergoes additional stress testing for automotive under-hood reliability, including temperature cycling, humidity bias, and mechanical shock validation.
How does P4KE24HE3/73 perform under elevated ambient temperatures?
P4KE24HE3/73 derates linearly above 25 °C ambient: its peak pulse power drops to ~50% at TJ = 125 °C (per Fig. 2), and steady-state power dissipation falls to zero at TL = 150 °C (per Fig. 5). Its 175 °C max junction temperature allows operation in high-temp environments when PCB layout provides adequate copper pour for heat spreading.
Can P4KE24HE3/73 be used in place of P4KE24A?
Yes - P4KE24HE3/73 is the AEC-Q101 qualified, whisker-resistant version of P4KE24A, sharing identical electrical characteristics (VBR, VWM, VC, PPPM) and DO-41 packaging. The HE3 suffix adds automotive-grade reliability testing and enhanced plating, making P4KE24HE3/73 a drop-in replacement where qualification and long-term stability are required.
P4KE24HE3/73 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):
- 19.4V
- Voltage - Breakdown (Min):
- 21.6V
- Voltage - Clamping (Max) @ Ipp:
- 34.7V
- Current - Peak Pulse (10/1000µs):
- 11.5A
- 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)
P4KE24HE3/73 FAQ
1.How can I place an order for P4KE24HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE24HE3/73 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 P4KE24HE3/73 reliable?
The price and inventory of P4KE24HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE24HE3/73 is usually 5 days.
3.What payment methods are accepted for P4KE24HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE24HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE24HE3/73?
P4KE24HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE24HE3/73 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 P4KE24HE3/73?
For technical support, including P4KE24HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE24HE3/73 requirements.
6.How does Aetrix verify that P4KE24HE3/73 is sourced from the original manufacturer or authorized distributors?
All P4KE24HE3/73 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 P4KE24HE3/73 meets industry standards.
7.What is the process for return or replacement of P4KE24HE3/73?
All P4KE24HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with P4KE24HE3/73, 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 P4KE24HE3/73 part is unused and in its original packaging.
Return procedure for P4KE24HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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