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Vishay General Semiconductor - Diodes Division P4SMA43CA-M3/5A
- Part No.:
- P4SMA43CA-M3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA43CA-M3/5A.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,852
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Product details
Overview
P4SMA43CA-M3/5A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the P4SMA series, designed for clamping voltage transients on signal and power lines. It features a 43 V breakdown voltage (VBR = 40.9–45.2 V at IT = 1.0 mA), 36.8 V stand-off 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, sensor interfaces, and telecom line drivers.
For engineers reviewing the P4SMA43CA-M3/5A datasheet, P4SMA43CA-M3/5A pinout, P4SMA43CA-M3/5A application, or P4SMA43CA-M3/5A equivalent, key selection criteria include bidirectional clamping capability, SMA (DO-214AC) package compatibility with automated placement, AEC-Q101 qualification status, thermal resistance (RθJA = 120 °C/W), and compliance with UL 497B surge protector classification.
Technical Context
The P4SMA43CA-M3/5A 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 VWM), while its 10/1000 µs waveform rating supports repetitive surge events at 0.01% duty cycle.
Thermally, it uses a DO-214AC (SMA) package with matte tin-plated leads solderable per J-STD-002, rated for TJ = –65 °C to +150 °C and meeting MSL Level 1 (peak reflow 260 °C). Its RθJL = 30 °C/W enables effective heat conduction to PCB copper pads (0.2" × 0.2") during transient events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 40.9 V / 45.2 V at IT = 1.0 mA - defines precise avalanche onset window for reliable clamping threshold |
| VWM | 36.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 59.3 V at 6.7 A - clamped voltage during 400 W transient, limiting downstream IC stress |
| PPPM | 400 W (10/1000 µs) - peak surge energy handling capacity under standard lightning/surge test waveform |
| IPPM | 6.7 A - peak pulse current corresponding to VC, determines minimum trace width and layout robustness |
| RθJA | 120 °C/W - thermal resistance from junction to ambient, critical for derating above 25 °C ambient |
| Package | SMA (DO-214AC) - industry-standard 2-pin SMD outline, compatible with JEDEC MS-013, footprint size 4.93 mm × 3.99 mm |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional device with no polarity marking. Cathode/anode terminals are functionally symmetrical; both leads serve as interchangeable surge current paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge current entry (negative polarity transient) | Accepts reverse-biased avalanche conduction during negative-going transients; identical behavior to cathode |
| Cathode | Surge current entry (positive polarity transient) | Accepts reverse-biased avalanche conduction during positive-going transients; identical behavior to anode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 400 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly laid out on 5.0 mm × 5.0 mm copper pads |
| Halogen-free & RoHS-compliant (M3 suffix) | Fulfills environmental compliance requirements for industrial and automotive end equipment without compromising surge performance |
| AEC-Q101 qualified option available | Enables use in automotive subsystems (e.g., body control modules) where reliability validation is mandatory |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD > 1 ns rise time), improving system-level robustness |
Applications
| Industrial Sensor Interface Protection | Telecom Line Driver Clamping |
|---|---|
|
Use Scenario: Protecting analog input pins of 24 V industrial PLC analog I/O modules against inductive switching transients from solenoid valves. IC Role / Device Role / Timing Role: Bidirectional TVS placed between signal line and ground, clamping ±1 kV transients within nanoseconds. Use Value: Prevents latch-up or permanent damage to precision ADC front-ends by limiting voltage to ≤59.3 V during surge events. |
Use Scenario: Safeguarding RS-485 transceivers in outdoor base station backhaul links exposed to lightning-induced surges on twisted-pair lines. IC Role / Device Role / Timing Role: Primary line-side TVS on differential bus, absorbing common-mode surges before reaching transceiver ESD structures. Use Value: Maintains signal integrity up to 10 Mbps by suppressing transients without adding capacitance (>100 pF) that would distort edge rates. |
| Automotive Body Control Module | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Shielding LIN bus nodes in door module ECUs from load dump and jump-start induced voltage spikes. IC Role / Device Role / Timing Role: Bidirectional clamp across LIN data line and chassis ground, activated within <1 ns of overvoltage detection. Use Value: Ensures uninterrupted communication during 12 V system transients up to 40 V, meeting ISO 7637-2 Pulse 1/2a requirements. |
Use Scenario: Protecting microcontroller GPIOs driving brushed DC motors in smart home vacuum cleaners from back-EMF spikes. IC Role / Device Role / Timing Role: Localized TVS at motor driver output stage, shunting inductive kickback away from logic-level MOSFET gates. Use Value: Eliminates need for external snubbers or larger gate resistors, reducing BOM count while maintaining 100 kHz PWM switching integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA | Higher PPPM = 600 W, larger SMB (DO-214AA) package (4.58 mm × 3.94 mm), VC = 69.4 V @ 8.6 A | Better suited for higher-energy surges but requires larger PCB area and has higher clamping voltage | Select when system-level surge testing exceeds IEC 61000-4-5 Level 4 or when layout allows larger footprint |
| 1.5KE43CA | Through-hole TO-218 package, PPPM = 1500 W, VC = 69.4 V @ 21.7 A, higher thermal mass | Designed for board-level primary protection; not suitable for space-constrained SMT designs | Choose only for legacy through-hole systems or where manual assembly and high-energy dissipation are prioritized over miniaturization |
Compared with SMBJ43CA and 1.5KE43CA, the P4SMA43CA-M3/5A delivers optimal balance of compact SMA footprint, 400 W surge rating, and low 59.3 V clamping - making it ideal for dense, high-volume SMT applications where board space and automated assembly are critical constraints.
Availability
P4SMA43CA-M3/5A is available at Aetrix Electronics and suitable for industrial sensor interface protection, telecom line driver clamping, automotive body control modules, and consumer appliance motor drive protection requiring stable component supply and halogen-free compliance.
Supply support for P4SMA43CA-M3/5A 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 optimization.
The P4SMA series is engineered for high-reliability transient suppression in space-constrained SMT applications, targeting industrial automation, automotive electronics, and telecom infrastructure where consistent clamping performance and AEC-Q101 readiness matter.
FAQ
What is the breakdown voltage tolerance for P4SMA43CA-M3/5A?
The P4SMA43CA-M3/5A has a specified breakdown voltage range of 40.9 V to 45.2 V at test current IT = 1.0 mA, representing a ±5% tolerance around the nominal 43 V rating. This tight VBR window ensures predictable clamping onset across production lots and temperature ranges, critical for consistent system-level surge margin design. The P4SMA43CA-M3/5A maintains this specification under standard test conditions per ANSI/IEEE C62.35.
Is P4SMA43CA-M3/5A suitable for automotive applications?
The P4SMA43CA-M3/5A itself is halogen-free and RoHS-compliant (M3 suffix) but is not AEC-Q101 qualified. For automotive use, Vishay offers the P4SMA43CAHM3_B/I variant - same electrical specs and package, but with full AEC-Q101 qualification. Engineers must select the HM3-suffixed version for under-hood or safety-critical modules; the P4SMA43CA-M3/5A remains appropriate for non-automotive industrial or consumer applications.
What is the maximum clamping voltage of P4SMA43CA-M3/5A under surge conditions?
The P4SMA43CA-M3/5A exhibits a maximum clamping voltage (VC) of 59.3 V at peak pulse current IPPM = 6.7 A, measured with a 10/1000 µs waveform. This value represents the worst-case voltage seen by protected circuitry during standardized surge events and directly determines the required voltage margin for downstream ICs. The P4SMA43CA-M3/5A achieves this clamping performance while maintaining low incremental surge resistance for minimal overshoot.
Does P4SMA43CA-M3/5A have polarity markings on the package?
No, the P4SMA43CA-M3/5A is a bidirectional TVS diode and carries no polarity marking on its SMA (DO-214AC) package. Unlike unidirectional variants (e.g., P4SMA43A), which feature a cathode band, the CA-suffixed version functions identically in both directions - meaning either terminal may be connected to signal or ground without affecting clamping behavior. This simplifies layout and eliminates orientation errors during automated placement.
What is the thermal resistance of P4SMA43CA-M3/5A, and how does it affect layout?
The P4SMA43CA-M3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on standard 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimal PCB copper; increasing pad area or adding internal ground planes reduces RθJA and improves surge endurance. For sustained operation near TJ = 150 °C, designers must derate power dissipation using Fig. 2 from the datasheet - a key consideration when specifying the P4SMA43CA-M3/5A for high-duty-cycle environments.
P4SMA43CA-M3/5A 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):
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA43CA-M3/5A FAQ
1.How can I place an order for P4SMA43CA-M3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA43CA-M3/5A 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 P4SMA43CA-M3/5A reliable?
The price and inventory of P4SMA43CA-M3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA43CA-M3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA43CA-M3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA43CA-M3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA43CA-M3/5A?
P4SMA43CA-M3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA43CA-M3/5A 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 P4SMA43CA-M3/5A?
For technical support, including P4SMA43CA-M3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA43CA-M3/5A requirements.
6.How does Aetrix verify that P4SMA43CA-M3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA43CA-M3/5A 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 P4SMA43CA-M3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA43CA-M3/5A?
All P4SMA43CA-M3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA43CA-M3/5A, 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 P4SMA43CA-M3/5A part is unused and in its original packaging.
Return procedure for P4SMA43CA-M3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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