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Vishay General Semiconductor - Diodes Division P4SMA24CAHE3_A/I
- Part No.:
- P4SMA24CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA24CAHE3_A/I.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,906
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Product details
Overview
P4SMA24CAHE3_A/I 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 automotive and industrial systems.
For engineers reviewing the P4SMA24CAHE3_A/I datasheet, P4SMA24CAHE3_A/I pinout, P4SMA24CAHE3_A/I application, or P4SMA24CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low incremental surge resistance, and compatibility with automated SMT assembly on standard PCB copper pads.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal lines without polarity concerns. Its glass-passivated junction ensures stable breakdown behavior and fast response time (<1 ns) to transient events such as ESD, inductive switching spikes, and lightning-induced surges.
The device is rated for 150 °C maximum junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its thermal resistance (RθJA = 120 °C/W) reflects performance on standard 0.2" × 0.2" copper pads, and it delivers consistent clamping across repetitive 0.01% duty cycle pulses.
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 mA test current - precise voltage threshold where avalanche conduction initiates reliably. |
| VC (Clamping Voltage) | 33.2 V at 12 A IPPM - peak voltage seen by protected circuit during worst-case 10/1000 µs transient; critical for IC survivability. |
| PPPM (Peak Pulse Power) | 400 W - energy-handling capacity under standardized 10/1000 µs surge; enables robust protection against IEC 61000-4-5 threats. |
| ID (Reverse Leakage) | 1.0 µA at VWM - negligible standby current ensuring minimal power loss and no interference with low-power sensor signals. |
| TJ max. | 150 °C - supports operation in under-hood automotive and high-temperature industrial environments without derating. |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, humidity testing, and mechanical shock per AEC specification. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. No polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | One terminal of symmetrical PN junction; conducts surge current equally in either direction during overvoltage event. |
| Cathode | Transient current exit (bidirectional) | Second terminal of symmetrical structure; forms complete low-impedance path to shunt energy away from protected node. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC, differential, or floating signal lines without external polarity management. |
| 400 W peak pulse power | Handles high-energy transients per IEC 61000-4-5 Level 4 (4 kV surge) when mounted on recommended 5 mm × 5 mm copper pads. |
| Glass passivated junction | Ensures stable, repeatable breakdown voltage and long-term reliability under repeated surge stress. |
| AEC-Q101 qualification | Validated for automotive electronics including engine control units, body modules, and ADAS sensor interfaces. |
| MSL Level 1 rating | Supports standard SMT reflow profiles up to 260 °C peak without moisture-related failure risk. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector entry point to clamp transients before they reach signal conditioning circuitry. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V microcontrollers and precision ADCs exposed to ±100 V transients. |
Use Scenario: Safeguarding digital input/output channels of programmable logic controllers against field-wiring induced surges and ground bounce. IC Role / Device Role / Timing Role: Low-capacitance TVS installed across isolated 24 V DC input terminals to suppress fast-rising transients from relay coil switching. Use Value: Maintains signal integrity and prevents false triggering while supporting >100,000 surge cycles per IEC 61000-4-4. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Shielding Ethernet PHYs and RS-485 transceivers from ESD and lightning-induced surges in network equipment and base stations. IC Role / Device Role / Timing Role: Bidirectional TVS deployed on differential pairs to preserve common-mode rejection while limiting differential overvoltage. Use Value: Achieves <10 pF junction capacitance at VWM, minimizing signal distortion on 100 Mbps+ data lines. |
Use Scenario: Suppressing back-EMF spikes generated by brushed DC motors in washing machines, HVAC blowers, and power tools. IC Role / Device Role / Timing Role: Mounted across motor terminals to divert inductive kickback energy away from H-bridge MOSFETs and gate drivers. Use Value: Limits voltage overshoot to ≤33.2 V, preventing avalanche failure of 40 V-rated power switches during commutation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CA | Higher 600 W PPPM rating; larger SMB (DO-214AA) package; 38.9 V VC at 17.3 A. | Better suited for higher-energy surges but requires more PCB area and has higher thermal resistance (RθJA = 140 °C/W). | Select when system-level surge testing exceeds IEC 61000-4-5 Level 4 or when board layout allows larger footprint. |
| 1.5KE24CA | Through-hole TO-204AE (DO-204AB) package; 1500 W PPPM; 38.9 V VC at 38.8 A; higher leakage (5.0 µA). | Designed for legacy through-hole designs or high-power primary-side protection; not suitable for dense SMT layouts. | Choose only for cost-sensitive, non-automated production or where manual repairability is prioritized over miniaturization. |
Compared with SMBJ24CA and 1.5KE24CA, the P4SMA24CAHE3_A/I offers optimal balance of compact SMA footprint, AEC-Q101 qualification, and sufficient 400 W surge handling for secondary-side protection in space-constrained automotive and industrial modules.
Availability
P4SMA24CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer appliance motor control requiring stable component supply and AEC-Q101 compliance.
Supply support for P4SMA24CAHE3_A/I 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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series targets high-volume, high-reliability transient suppression in automotive, industrial, and communications systems - engineered for automated assembly, thermal stability, and consistent clamping performance across temperature and lifetime.
FAQ
What is the clamping voltage of P4SMA24CAHE3_A/I at its rated peak pulse current?
The P4SMA24CAHE3_A/I exhibits a maximum clamping voltage (VC) of 33.2 V when subjected to its specified 12 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured at TA = 25 °C on 0.2" × 0.2" copper pads and represents the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is P4SMA24CAHE3_A/I suitable for automotive applications?
Yes, P4SMA24CAHE3_A/I is AEC-Q101 qualified and explicitly designated for automotive use via its "HE3" suffix and revision "A" ordering code. It undergoes stress testing for temperature cycling, humidity, mechanical shock, and surge endurance per AEC requirements - making it appropriate for engine control units, body electronics, and ADAS sensor interfaces where reliability under harsh conditions is mandatory.
How does the bidirectional configuration of P4SMA24CAHE3_A/I affect its circuit placement?
The bidirectional nature of P4SMA24CAHE3_A/I eliminates polarity sensitivity, allowing it to be placed across any two nodes subject to differential or AC-coupled transients - such as RS-485 lines, CAN bus pairs, or transformer-coupled interfaces. Unlike unidirectional TVS diodes, P4SMA24CAHE3_A/I requires no cathode/anode orientation check during placement, simplifying layout and reducing assembly errors in automated SMT processes.
What is the thermal resistance of P4SMA24CAHE3_A/I, and how does it impact PCB layout?
P4SMA24CAHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard FR-4 board material and natural convection; increasing pad area or adding thermal vias can reduce effective RθJA, improving sustained surge handling and long-term reliability in thermally demanding environments.
Does P4SMA24CAHE3_A/I meet RoHS and halogen-free requirements?
Yes, P4SMA24CAHE3_A/I carries the "HE3" suffix indicating RoHS-compliant construction and AEC-Q101 qualification. It is not halogen-free - that designation applies to "HM3" variants. The molding compound meets UL 94 V-0 flammability rating, and terminals are matte tin plated per J-STD-002, ensuring compatibility with lead-free reflow processes and environmental compliance for commercial and automotive markets.
P4SMA24CAHE3_A/I 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:
- -
- 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_A/I FAQ
1.How can I place an order for P4SMA24CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA24CAHE3_A/I 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_A/I reliable?
The price and inventory of P4SMA24CAHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA24CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA24CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA24CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA24CAHE3_A/I?
P4SMA24CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA24CAHE3_A/I 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_A/I?
For technical support, including P4SMA24CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA24CAHE3_A/I requirements.
6.How does Aetrix verify that P4SMA24CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA24CAHE3_A/I 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_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA24CAHE3_A/I?
All P4SMA24CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA24CAHE3_A/I, 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_A/I part is unused and in its original packaging.
Return procedure for P4SMA24CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA24CAHE3_A/I Tags
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