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Vishay General Semiconductor - Diodes Division P4SMA24CAHE3/5A
- Part No.:
- P4SMA24CAHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA24CAHE3/5A.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,469
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Product details
Overview
P4SMA24CAHE3/5A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 24 V standoff voltage (VWM), 25.2 V minimum breakdown voltage (VBR), and 400 W peak pulse power (10/1000 µs). It clamps transients to ≤33.2 V at 12 A peak pulse current and is AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the P4SMA24CAHE3/5A datasheet, P4SMA24CAHE3/5A pinout, P4SMA24CAHE3/5A application, or P4SMA24CAHE3/5A equivalent, this device serves as a robust, RoHS-compliant, bidirectional surge protector for signal lines, sensor interfaces, and power rails in harsh environments where fast response (<1 ns), low clamping voltage, and high reliability are critical.
Technical Context
This bidirectional TVS operates symmetrically in both polarities with identical electrical characteristics - no cathode/anode distinction - making it ideal for AC-coupled or differential signal paths. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1 µA at 20.5 V).
Designed for transient suppression per IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and ISO 7637-2 (automotive load dump), it delivers 400 W peak pulse power at TA = 25 °C on standard 5.0 mm × 5.0 mm copper pads, derating linearly above 25 °C with RθJA = 120 °C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 20.5 V - Maximum continuous reverse voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 22.8–25.2 V at 1.0 mA - Confirmed avalanche onset range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 33.2 V at IPPM = 12 A - Peak voltage seen by protected circuit under 10/1000 µs surge; limits stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 400 W - Sustains single 10/1000 µs transients without failure; enables protection against lightning-induced surges and inductive switching spikes. |
| ID (Reverse Leakage) | ≤1.0 µA at VWM - Negligible standby current; avoids signal distortion or battery drain in always-on systems. |
| TJ max. | 150 °C - Enables operation in under-hood automotive environments and industrial enclosures with elevated ambient temperatures. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 standards. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile (max height 2.29 mm), matte tin-plated terminals, UL 94 V-0 molding compound, MSL Level 1 (260 °C reflow compatible).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | No polarity marking; interchangeable connection - protects AC signals, differential buses, or floating references without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Withstands high-energy transients common in automotive load-dump and industrial motor switching without degradation. |
| Fast response time (<1 ns) | Activates before sensitive logic or analog circuitry sustains damage from ESD or EFT pulses. |
| Glass-passivated junction | Ensures long-term stability of VBR and low parametric drift across temperature and lifetime. |
| RoHS-compliant + AEC-Q101 qualified | Meets automotive supply chain requirements for traceability, reliability, and environmental compliance. |
| MSL Level 1 rating | Supports standard SMT reflow profiles without pre-baking; reduces manufacturing complexity and cost. |
Applications
| Automotive Sensor Interface | Industrial CAN Bus Protection |
|---|---|
Use Scenario: Protecting LIN/CAN transceivers and MEMS sensor signal lines from ESD and load-dump transients in engine control units and body modules. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point or IC I/O pins. Use Value: Limits transient voltage to ≤33.2 V while maintaining <1 µA leakage - preserving signal integrity and enabling reliable communication in 12 V/24 V vehicle networks. |
Use Scenario: Safeguarding CAN FD physical layer transceivers against ISO 7637-2 pulse 1, 2a, 3a/b, and IEC 61000-4-2 contact discharge up to ±15 kV. IC Role / Device Role / Timing Role: Primary line-to-line and line-to-ground TVS on differential CANH/CANL traces. Use Value: Symmetric clamping ensures equal protection for both bus lines without biasing concerns; 400 W rating handles repetitive surge stress in factory automation networks. |
| Consumer USB Port Protection | Telecom DSL Line Interface |
Use Scenario: Shielding USB 2.0 data lines (D+/D−) and VBUS from ESD events during hot-plug insertion in set-top boxes and smart displays. IC Role / Device Role / Timing Role: Low-capacitance bidirectional suppressor placed adjacent to USB connector. Use Value: Clamps ±15 kV ESD strikes to <33.2 V within nanoseconds - preventing latch-up or gate oxide damage in USB PHY ICs. |
Use Scenario: Protecting ADSL/VDSL line drivers and SLIC circuits from lightning-induced surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: Secondary-level surge protector between isolation transformer and codec IC. Use Value: Withstands 400 W surges while maintaining 20.5 V standoff - allowing clean DC bias for line drivers and avoiding false triggering during normal mode noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CA | Same VWM/VBR/VC specs but in larger SMB (DO-214AA) package; higher thermal mass (RθJA = 85 °C/W); 600 W PPPM rating. | Better suited for higher average power dissipation or less dense PCB layouts where footprint is not constrained. | Select when board space allows larger package and higher sustained surge energy handling is required. |
| 1.5KE24CA | Through-hole TO-218 package; same 24 V bidirectional rating; 1500 W PPPM; higher IFSM (200 A); no AEC-Q101 qualification. | Used in legacy industrial power supplies or telecom line cards where through-hole assembly remains standard. | Choose only for non-automotive, non-SMT designs requiring maximum single-pulse energy absorption. |
Compared with SMBJ24CA and 1.5KE24CA, the P4SMA24CAHE3/5A offers optimal balance of compact SMA footprint, AEC-Q101 qualification, and sufficient 400 W surge capability for modern automotive and space-constrained industrial modules - without sacrificing reliability or manufacturability.
Availability
P4SMA24CAHE3/5A is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, consumer USB peripherals, and telecom line interface cards requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for P4SMA24CAHE3/5A 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, efficiency, and application-specific performance.
The P4SMA Series targets high-volume, high-reliability transient suppression in automotive, industrial, and communications equipment - engineered for automated SMT assembly, AEC-Q101 compliance, and consistent clamping behavior across temperature and life cycle.
FAQ
What is the standoff voltage rating of P4SMA24CAHE3/5A?
The P4SMA24CAHE3/5A has a standoff voltage (VWM) of 20.5 V - the maximum DC or continuous reverse voltage it can block without significant conduction. This value ensures safe operation below its 22.8–25.2 V breakdown range and provides design margin for nominal 24 V systems. The "CA" suffix confirms its bidirectional configuration, meaning this rating applies equally in both directions.
Is P4SMA24CAHE3/5A suitable for automotive applications?
Yes, P4SMA24CAHE3/5A is AEC-Q101 qualified and carries the "HE3" suffix denoting RoHS-compliant, automotive-grade construction. It meets stringent requirements for temperature cycling, high-temperature reverse bias, and ESD robustness - making it appropriate for engine control, ADAS sensors, and infotainment interfaces where reliability under vibration, thermal stress, and electrical transients is mandatory.
What does the "/5A" in P4SMA24CAHE3/5A indicate?
The "/5A" denotes the packaging configuration: 13-inch diameter plastic tape and reel containing 7500 units. This format supports high-speed pick-and-place assembly in volume manufacturing. The base part P4SMA24CAHE3 is identical electrically and mechanically; only the reel size and quantity differ from alternatives like /61 (7-inch reel, 1800 units).
How does P4SMA24CAHE3/5A compare to unidirectional variants like P4SMA24AHE3/5A?
P4SMA24CAHE3/5A is bidirectional with symmetrical clamping in both polarities and no polarity marking, whereas P4SMA24AHE3/5A is unidirectional with a cathode band and conducts only in reverse bias. The "C" in the former enables protection of AC signals, differential buses, or floating references without orientation sensitivity - critical for CAN, RS-485, or audio lines where voltage polarity reverses.
What is the clamping voltage of P4SMA24CAHE3/5A at its rated peak pulse current?
The P4SMA24CAHE3/5A clamps to a maximum of 33.2 V when subjected to its rated peak pulse current (IPPM) of 12 A under the standard 10/1000 µs waveform. This clamping voltage is measured across the device terminals during surge conduction and represents the upper voltage limit imposed on the protected circuit - a key parameter for ensuring downstream ICs remain within absolute maximum ratings.
P4SMA24CAHE3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- P4SMA, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 20.5V
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 33.2V
- Current - Peak Pulse (10/1000µs):
- 12A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA24CAHE3/5A FAQ
1.How can I place an order for P4SMA24CAHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA24CAHE3/5A 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 P4SMA24CAHE3/5A reliable?
The price and inventory of P4SMA24CAHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA24CAHE3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA24CAHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA24CAHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA24CAHE3/5A?
P4SMA24CAHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA24CAHE3/5A 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 P4SMA24CAHE3/5A?
For technical support, including P4SMA24CAHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA24CAHE3/5A requirements.
6.How does Aetrix verify that P4SMA24CAHE3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA24CAHE3/5A 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 P4SMA24CAHE3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA24CAHE3/5A?
All P4SMA24CAHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA24CAHE3/5A, 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 P4SMA24CAHE3/5A part is unused and in its original packaging.
Return procedure for P4SMA24CAHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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