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Vishay General Semiconductor - Diodes Division P4SMA43CAHE3_A/I
- Part No.:
- P4SMA43CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA43CAHE3_A/I.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,511
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Product details
Overview
P4SMA43CAHE3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in the P4SMA series, designed for clamping voltage transients on signal and power lines. It features a 43 V breakdown voltage (VBR min/max = 40.9–45.2 V at 1 mA), 36.8 V standoff voltage (VWM), 59.3 V maximum clamping voltage (VC) at 6.7 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial control systems.
For engineers reviewing the P4SMA43CAHE3_A/I datasheet, P4SMA43CAHE3_A/I pinout, P4SMA43CAHE3_A/I application, or P4SMA43CAHE3_A/I equivalent, this device delivers AEC-Q101 qualification, SMA (DO-214AC) package compatibility, low incremental surge resistance, and bidirectional transient suppression without polarity constraints - critical for robust ESD and load-switching surge protection in space-constrained PCB layouts.
Technical Context
The P4SMA43CAHE3_A/I operates as a bidirectional avalanche diode, leveraging glass-passivated junction technology to achieve fast response time (<1 ns) and stable clamping under repetitive 10/1000 µs surges. Its symmetrical I-V characteristic enables identical forward and reverse conduction behavior, eliminating polarity marking requirements and simplifying layout for differential or AC-coupled lines.
Thermally, it exhibits RθJA = 120 °C/W and RθJL = 30 °C/W, supporting operation up to TJ = 150 °C. With 1.0 µA max reverse leakage at VWM, it minimizes standby power loss while maintaining tight VBR tolerance (±5%) and temperature coefficient of +0.101 %/°C - enabling predictable performance across automotive temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 40.9–45.2 V at 1 mA - defines precise avalanche initiation threshold for reliable overvoltage triggering |
| Standoff Voltage VWM | 36.8 V - maximum continuous operating voltage before leakage exceeds 1.0 µA, ensuring no false triggering |
| Clamping Voltage VC | 59.3 V at 6.7 A IPPM - limits downstream voltage during surge, protecting 3.3 V/5 V/12 V logic and analog circuitry |
| Peak Pulse Power PPPM | 400 W (10/1000 µs) - sustains high-energy transients common in automotive load-dump and inductive switching events |
| Package | SMA (DO-214AC) - industry-standard SMD outline with 5.0 mm × 5.0 mm copper pad thermal design, MSL Level 1 compliant |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per AEC standard |
| Max Reverse Leakage ID | 1.0 µA at VWM - ensures minimal quiescent current draw in battery-powered or low-power sensor nodes |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional - no polarity marking; symmetrical two-terminal construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Identical avalanche behavior in both directions; either terminal may connect to line or ground - no orientation dependency |
| Case / Body | Thermal and mechanical interface | Non-electrical; mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for optimal heat dissipation and 400 W pulse handling |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), and ungrounded power rails without polarity concerns |
| 400 W peak pulse power | Withstands automotive load-dump pulses (ISO 7637-2 Pulse 5a) and industrial relay coil flyback energy without degradation |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity stress - critical for 15-year automotive life |
| AEC-Q101 qualification | Validated for automotive electronics use including engine control units, body controllers, and ADAS sensor interfaces |
| MSL Level 1, 260 °C reflow | Compatible with standard lead-free SMT assembly processes without pre-baking or special handling |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from ISO 16750-2 supply transients and ESD. IC Role / Device Role / Timing Role: Bidirectional TVS placed between signal line and ground to clamp ±25 kV ESD and ±100 V load-dump spikes. Use Value: Prevents latch-up or permanent damage to 3.3 V microcontrollers and precision ADC front-ends in harsh vehicle environments. |
Use Scenario: Shielding digital input modules from inductive kickback when switching solenoids, contactors, or relays in factory automation. IC Role / Device Role / Timing Role: Fast-response clamping device installed at terminal block entry point to suppress 600 V/100 A transients. Use Value: Eliminates need for external snubbers or varistors, reducing BOM count and improving system MTBF in 24 V DC control systems. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Safeguarding Ethernet PHYs and PoE injectors against lightning-induced surges on twisted-pair cabling per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary-level TVS on RJ45 magnetics secondary side, coordinated with gas discharge tube (GDT) upstream. Use Value: Limits induced common-mode voltage to <60 V, preserving Ethernet compliance and preventing PHY reset or data corruption. |
Use Scenario: Secondary-side transient suppression on 5 V/9 V/12 V USB-C and barrel-jack power inputs in smart home hubs and audio devices. IC Role / Device Role / Timing Role: Final-stage clamping element after primary MOV and fuse, absorbing residual switching noise and hot-plug spikes. Use Value: Maintains clean DC rail during plug-in events and prevents brownout resets in low-voltage SoCs and PMICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA | Same VBR range (40.9–45.2 V), but SMB package (DO-214AA); 600 W PPPM rating, higher thermal mass | Better suited for higher-energy surges; requires larger PCB footprint and different pad layout | Select SMBJ43CA when surge energy exceeds 400 W or when board space allows larger package for improved thermal margin |
| 1.5KE43CA | Through-hole TO-218 package; same VBR and VC, but 1500 W PPPM and higher IPPM (34.7 A) | Designed for legacy or high-reliability through-hole assemblies; not suitable for automated SMT production | Choose 1.5KE43CA only for repair, military/aerospace retrofits, or where manual assembly and extreme surge immunity are mandatory |
Compared with SMBJ43CA and 1.5KE43CA, the P4SMA43CAHE3_A/I offers optimal balance of compact SMA footprint, AEC-Q101 qualification, and 400 W surge capability - making it the preferred choice for new automotive and industrial SMT designs requiring certified reliability and space efficiency.
Availability
P4SMA43CAHE3_A/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC I/O modules, telecom line interfaces, and consumer power adapter designs requiring stable component supply, AEC-Q101 traceability, and RoHS-compliant manufacturing.
Supply support for P4SMA43CAHE3_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, MOSFETs, and protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The P4SMA series is engineered for high-volume, space-constrained transient suppression in automotive, industrial, and communications equipment - delivering consistent clamping performance and AEC-Q101 validation in standardized SMD packages.
FAQ
What is the exact breakdown voltage range for P4SMA43CAHE3_A/I?
The P4SMA43CAHE3_A/I has a guaranteed breakdown voltage (VBR) range of 40.9 V to 45.2 V at 1 mA test current, measured per ANSI/IEEE C62.35. This tight ±5% tolerance ensures predictable clamping onset across production lots and temperature extremes, directly supporting design margin calculations for protected circuits.
Is P4SMA43CAHE3_A/I suitable for automotive applications?
Yes, the P4SMA43CAHE3_A/I is AEC-Q101 qualified and carries the HE3 suffix indicating automotive-grade screening and reliability testing. It meets requirements for engine bay, chassis, and cabin electronics - including temperature cycling, humidity bias, and mechanical shock - making it fully suitable for use in modern automotive ECUs and ADAS sensor interfaces.
What does the "CA" suffix mean in P4SMA43CAHE3_A/I?
The "CA" suffix in P4SMA43CAHE3_A/I denotes bidirectional configuration: the device provides symmetrical transient suppression in both polarities, with identical VBR, VC, and leakage characteristics forward and reverse. This eliminates polarity marking and simplifies layout for AC-coupled or floating signal lines.
What is the maximum clamping voltage of P4SMA43CAHE3_A/I under surge conditions?
The P4SMA43CAHE3_A/I clamps to a maximum of 59.3 V at 6.7 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is critical for determining safe voltage margins for downstream components - for example, ensuring 5 V logic ICs remain below absolute maximum ratings during surge events.
Does P4SMA43CAHE3_A/I require special PCB layout considerations?
Yes - to achieve rated 400 W pulse power, the P4SMA43CAHE3_A/I must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, per Vishay's thermal design guidelines. Reduced pad area degrades thermal dissipation and lowers actual surge capability, potentially leading to premature failure under repeated transients.
P4SMA43CAHE3_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):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 6.7A
- 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)
P4SMA43CAHE3_A/I FAQ
1.How can I place an order for P4SMA43CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA43CAHE3_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 P4SMA43CAHE3_A/I reliable?
The price and inventory of P4SMA43CAHE3_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 P4SMA43CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA43CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA43CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA43CAHE3_A/I?
P4SMA43CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA43CAHE3_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 P4SMA43CAHE3_A/I?
For technical support, including P4SMA43CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA43CAHE3_A/I requirements.
6.How does Aetrix verify that P4SMA43CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA43CAHE3_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 P4SMA43CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA43CAHE3_A/I?
All P4SMA43CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA43CAHE3_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 P4SMA43CAHE3_A/I part is unused and in its original packaging.
Return procedure for P4SMA43CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA43CAHE3_A/I Tags
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