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Vishay General Semiconductor - Diodes Division P4SMA24CA-E3/5A
- Part No.:
- P4SMA24CA-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA24CA-E3/5A.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,753
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Product details
Overview
P4SMA24CA-E3/5A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal and power lines. It features a 24 V standoff voltage (VWM), 27.6 V maximum clamping voltage at 12 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial and automotive electronics.
For engineers reviewing the P4SMA24CA-E3/5A datasheet, P4SMA24CA-E3/5A pinout, P4SMA24CA-E3/5A application, or P4SMA24CA-E3/5A equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, thermal derating curves, RoHS-compliant packaging, and AEC-Q101 qualification status - all critical for ESD/surge protection design validation and BOM selection.
Technical Context
The P4SMA24CA-E3/5A operates as a bidirectional avalanche diode, symmetrically clamping transient overvoltages in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at 20.5 V), while MSL Level 1 moisture sensitivity supports lead-free reflow up to 260 °C.
It delivers 400 W peak pulse power (10/1000 µs) at 25 °C, derated linearly above TA = 25 °C per Figure 2, with typical junction-to-ambient thermal resistance of 120 °C/W. The device meets UL 497B recognition (QVGQ2) and is rated for -65 °C to +150 °C operating junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 20.5 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 22.8–25.2 V at 1.0 mA test current - Ensures predictable, repeatable avalanche initiation across production lots. |
| VC (Clamping Voltage) | 33.2 V at 12.0 A IPPM - Limits downstream voltage stress during surge events; critical for protecting 3.3 V/5 V/24 V logic and analog circuits. |
| PPPM (Peak Pulse Power) | 400 W (10/1000 µs) - Sustains high-energy transients common in inductive load switching and lightning-induced surges. |
| ID (Reverse Leakage) | ≤1.0 µA at VWM - Minimizes standby power loss and avoids false triggering in high-impedance sensor or communication lines. |
| TJ max. | +150 °C - Enables reliable operation in under-hood automotive or enclosed industrial enclosures without forced cooling. |
| Package | SMA (DO-214AC) - Surface-mount footprint compatible with automated placement; 0.2" × 0.2" copper pad layout required for full 400 W rating. |
Pinout & Package
SMA (DO-214AC) package: molded plastic case with matte tin-plated leads, UL 94 V-0 flammability rating, no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Conducts during negative-going surges; symmetrical with cathode for bidirectional clamping. |
| Cathode | Transient current entry (positive polarity) | Conducts during positive-going surges; identical electrical behavior to anode due to bidirectional construction. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., RS-485, CAN, USB D+/D−) without polarity concerns. |
| 400 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) when mounted per recommended 5.0 mm × 5.0 mm copper pads. |
| AEC-Q101 qualified | Validated for automotive applications including body control modules, infotainment interfaces, and sensor hubs requiring reliability under thermal cycling and vibration. |
| MSL Level 1 | Allows unlimited floor life and compatibility with standard lead-free reflow profiles up to 260 °C peak temperature. |
| UL 497B recognized | Meets safety requirements for telecom and industrial signal line protectors (File E136766), simplifying system-level certification. |
Applications
| Industrial Motor Control | Automotive Sensor Interface |
|---|---|
|
Use Scenario: Protecting gate drivers and feedback signals in 24 V DC motor controllers exposed to inductive kickback from solenoids and relays. IC Role / Device Role / Timing Role: Bidirectional TVS placed across H-bridge inputs and encoder lines to clamp ±1 kV transients. Use Value: Prevents latch-up or permanent damage to microcontrollers and isolated gate drivers by limiting voltage to ≤33.2 V during 10/1000 µs surges. |
Use Scenario: Shielding LIN bus and analog pressure/temperature sensor outputs in engine bay modules subject to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Standoff-clamp element on sensor supply and signal pins, operating continuously at 12–24 V nominal rails. Use Value: Maintains <1.0 µA leakage at 20.5 V to avoid offset errors in 16-bit ADC front-ends while surviving 400 W surge events. |
| Telecom Line Protection | Consumer Power Adapter Input |
|
Use Scenario: Safeguarding Ethernet PHY magnetics and PoE injectors against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary clamping device on secondary-side DC lines (e.g., 24 V PoE output), paired with GDT or MOV upstream. Use Value: Achieves sub-100 ns response time and 33.2 V clamping to keep protected silicon within absolute maximum ratings during fast-rising transients. |
Use Scenario: Secondary-side overvoltage suppression in universal-input AC/DC adapters powering smart home hubs and IoT gateways. IC Role / Device Role / Timing Role: Final-stage transient suppressor on regulated 5 V/12 V outputs, guarding against capacitor discharge and regulator fault conditions. Use Value: Delivers 400 W pulse handling without degradation after repeated 10/1000 µs events, ensuring long-term reliability in unattended deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CA | Same VWM (20.5 V) and VC (33.2 V), but 600 W PPPM rating in larger SMB (DO-214AA) package; higher thermal mass. | Better suited for higher-repetition surge environments (e.g., factory automation PLC I/O); requires larger PCB area. | Select SMBJ24CA when >400 W pulse energy or improved thermal dissipation is required; not drop-in due to footprint change. |
| 1.5KE24CA | Through-hole TO-204AA (DO-201AE) package; same VWM/VC specs but 1500 W PPPM; higher IFSM (200 A). | Used in legacy designs or high-surge infrastructure equipment where manual assembly or mechanical robustness is prioritized. | Choose 1.5KE24CA for prototyping, repair, or high-energy legacy systems; incompatible with SMT-only production flows. |
Compared with SMBJ24CA and 1.5KE24CA, the P4SMA24CA-E3/5A offers optimal balance of compact SMA footprint, AEC-Q101 qualification, and 400 W surge capability - making it ideal for space-constrained, automotive-grade, and high-volume SMT applications where board real estate and reflow compatibility are critical.
Availability
P4SMA24CA-E3/5A is available at Aetrix Electronics and suitable for industrial motor control, automotive sensor interface, telecom line protection, and consumer power adapter input applications requiring stable component supply, RoHS compliance, and AEC-Q101 validation.
Supply support for P4SMA24CA-E3/5A 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The P4SMA Series was developed for robust, surface-mount transient suppression in automotive, industrial, and telecom systems - delivering consistent clamping, low leakage, and AEC-Q101 qualification in standardized SMA packages.
FAQ
What is the maximum clamping voltage of the P4SMA24CA-E3/5A at its rated peak pulse current?
The P4SMA24CA-E3/5A has a maximum clamping voltage (VC) of 33.2 V at 12.0 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per JEDEC standards and guarantees that downstream circuitry remains within safe voltage limits during surge events. The P4SMA24CA-E3/5A maintains this clamping performance across its specified operating temperature range of -65 °C to +150 °C.
Is the P4SMA24CA-E3/5A suitable for automotive applications?
Yes, the P4SMA24CA-E3/5A is AEC-Q101 qualified and explicitly listed in Vishay's automotive-grade ordering codes (HE3/HM3 variants). Its glass-passivated junction, MSL Level 1 rating, and operation up to +150 °C junction temperature make it appropriate for under-hood and chassis-mounted automotive modules. The P4SMA24CA-E3/5A is commonly deployed in engine control units, body electronics, and ADAS sensor interfaces requiring certified transient protection.
What is the standoff voltage (VWM) and why is it important for the P4SMA24CA-E3/5A?
The P4SMA24CA-E3/5A has a standoff voltage (VWM) of 20.5 V - the maximum continuous DC or RMS voltage the device can withstand without entering avalanche conduction. This parameter ensures reliable operation on 24 V nominal systems while maintaining low leakage (<1.0 µA). Selecting a VWM correctly prevents false triggering during normal operation while preserving sufficient margin to VBR (22.8–25.2 V) for dependable transient response. The P4SMA24CA-E3/5A's VWM directly enables its use in 24 V industrial and automotive power domains.
Does the P4SMA24CA-E3/5A have polarity markings on its SMA package?
No, the P4SMA24CA-E3/5A does not have polarity markings because it is a bidirectional TVS diode. Unlike unidirectional variants (e.g., P4SMA24A), the CA suffix indicates symmetrical clamping in both directions, eliminating the need for cathode band identification. This simplifies PCB layout and eliminates orientation errors during automated placement. The P4SMA24CA-E3/5A functions identically regardless of terminal connection direction.
What is the thermal resistance and how does it affect PCB layout for the P4SMA24CA-E3/5A?
The P4SMA24CA-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To achieve its full 400 W peak pulse rating, PCB layout must adhere to this pad size; smaller pads increase thermal impedance and reduce surge capability. The P4SMA24CA-E3/5A's RθJA value directly determines allowable duty cycle in repetitive surge environments and influences long-term reliability under sustained power dissipation.
P4SMA24CA-E3/5A 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:
- Active
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA24CA-E3/5A FAQ
1.How can I place an order for P4SMA24CA-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA24CA-E3/5A 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 P4SMA24CA-E3/5A reliable?
The price and inventory of P4SMA24CA-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA24CA-E3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA24CA-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA24CA-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA24CA-E3/5A?
P4SMA24CA-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA24CA-E3/5A 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 P4SMA24CA-E3/5A?
For technical support, including P4SMA24CA-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA24CA-E3/5A requirements.
6.How does Aetrix verify that P4SMA24CA-E3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA24CA-E3/5A 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 P4SMA24CA-E3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA24CA-E3/5A?
All P4SMA24CA-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA24CA-E3/5A, 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 P4SMA24CA-E3/5A part is unused and in its original packaging.
Return procedure for P4SMA24CA-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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