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Vishay General Semiconductor - Diodes Division P4SMA43A-E3/5A
- Part No.:
- P4SMA43A-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA43A-E3/5A.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA43A-E3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the P4SMA series, designed for clamping voltage transients on power and signal lines. It features a 43 V breakdown voltage (VBR = 40.9–45.2 V at 1 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 a 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and automotive electronics.
For engineers reviewing the P4SMA43A-E3/5A datasheet, P4SMA43A-E3/5A pinout, P4SMA43A-E3/5A application, or P4SMA43A-E3/5A equivalent, key selection criteria include unidirectional polarity, SMA (DO-214AC) package compatibility, clamping performance under 10/1000 µs surge, thermal resistance (RθJA = 120 °C/W), and AEC-Q101 qualification eligibility via HE3/HM3 variants.
Technical Context
The P4SMA43A-E3/5A operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology for stable reverse-biased transient suppression. Its clamping action begins at VWM = 36.8 V and fully engages at VBR = 40.9–45.2 V (tested at 1 mA), delivering VC = 59.3 V at IPPM = 6.7 A under standardized 10/1000 µs surge conditions.
It exhibits low incremental surge resistance and fast response time typical of silicon avalanche TVS devices, with thermal limits defined by TJ(max) = 150 °C and RθJL = 30 °C/W. The device is rated for repetitive surges at 0.01% duty cycle and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 40.9 V / 45.2 V at 1 mA - defines reliable avalanche onset range for consistent clamping initiation |
| VWM | 36.8 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | 59.3 V at 6.7 A - clamped voltage during 10/1000 µs surge, limiting stress on downstream components |
| PPPM | 400 W - peak pulse power handling capability under standard 10/1000 µs waveform |
| IPPM | 6.7 A - maximum non-repetitive peak pulse current supported at VC |
| TJ(max) | +150 °C - maximum junction temperature enabling operation in under-hood or industrial environments |
| RθJA | 120 °C/W - thermal resistance from junction to ambient, guiding PCB copper pad sizing for thermal management |
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; polarity indicated by cathode band on unidirectional types.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 36.8 V rail); band-marked end absorbs positive transients |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 surge events without derating below 91 V |
| Glass passivated chip junction | Ensures long-term stability and low leakage (<1 µA at VWM) across temperature and humidity |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns |
| AEC-Q101 qualification option | Available in HE3/HM3 variants for automotive-grade reliability validation in engine control and ADAS modules |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for 3.3 V/5 V logic |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Suppressing load-dump and alternator ripple transients on 12 V battery-fed ECUs and body control modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp positive surges above 36.8 V. Use Value: Limits voltage seen by downstream DC-DC converters and microcontrollers to ≤59.3 V during 6.7 A surges, preventing latch-up or gate oxide damage. |
Use Scenario: Protecting analog outputs and digital I/O of pressure, temperature, and position sensors in PLCs and motor drives. IC Role / Device Role / Timing Role: TVS connected across sensor output and reference/ground to absorb ESD and inductive switching noise. Use Value: Maintains signal integrity by clamping transients within 1 ns, with <1 µA leakage at 36.8 V ensuring minimal offset error in precision measurement circuits. |
| Telecom Interface Port Protection | Consumer Device USB/UART Line Protection |
|
Use Scenario: Safeguarding RS-485 transceivers and Ethernet PHY interfaces against lightning-induced surges in outdoor base stations. IC Role / Device Role / Timing Role: Primary-level TVS on differential bus lines, coordinated with secondary GDT or polymer PTC. Use Value: Withstands 400 W pulses while maintaining VC ≤59.3 V, preserving common-mode rejection and preventing receiver saturation. |
Use Scenario: Adding overvoltage resilience to USB 2.0 D+/D− and UART TX/RX traces in smart home hubs and wearables. IC Role / Device Role / Timing Role: Low-capacitance unidirectional suppressor placed adjacent to connector to shunt ESD strikes. Use Value: Delivers 15 kV contact ESD immunity (IEC 61000-4-2) without degrading signal rise time, thanks to DO-214AC package geometry and fast avalanche response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A (Diodes Inc.) | Same VWM (36.8 V), higher PPPM = 600 W, larger SMB (DO-214AA) package (4.58 × 3.94 mm vs. SMA's 4.50 × 2.79 mm) | Preferred where higher surge margin is needed and board space allows larger footprint | Select when system-level surge testing exceeds IEC 61000-4-5 Level 4 and layout permits SMB package |
| 1.5SMC43A (ON Semiconductor) | Identical VBR/VWM/VC specs, same SMA package, but rated for 1500 W PPPM (10/1000 µs) and higher IPPM = 21.5 A | Used in high-energy industrial motor drive controls requiring extended surge endurance | Choose when legacy designs require drop-in replacement with enhanced pulse handling, verified via thermal simulation |
Compared with P4SMA43A-E3/5A, SMBJ43A offers greater surge headroom in a larger package, while 1.5SMC43A delivers triple the peak power in identical SMA form factor - both require verification of PCB thermal relief and trace width for their respective IPPM ratings.
Availability
P4SMA43A-E3/5A is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom interface protection requiring stable component supply, RoHS-compliant commercial-grade TVS diodes, and 13-inch tape-and-reel delivery for high-volume SMT production.
Supply support for P4SMA43A-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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive qualification.
The P4SMA series is engineered for cost-effective, surface-mount transient suppression in consumer, industrial, and automotive applications - balancing high pulse power, tight parameter tolerances, and MSL-1 manufacturability in the compact SMA package.
FAQ
What is the maximum clamping voltage of the P4SMA43A-E3/5A under standard surge conditions?
The P4SMA43A-E3/5A has a maximum clamping voltage (VC) of 59.3 V when subjected to its rated peak pulse current of 6.7 A using the industry-standard 10/1000 µs waveform. This value is measured at TA = 25 °C on specified copper pads and represents the upper voltage limit imposed on protected circuitry during transient events. The P4SMA43A-E3/5A maintains this clamping performance across its full operating temperature range, supporting robust design margins in demanding environments.
Is the P4SMA43A-E3/5A suitable for automotive applications?
The P4SMA43A-E3/5A itself is a commercial-grade part (E3 suffix), but Vishay offers AEC-Q101 qualified versions under the HE3 and HM3 suffixes (e.g., P4SMA43AHE3_A). These variants undergo rigorous stress testing for temperature cycling, humidity, and mechanical shock, making them appropriate for automotive subsystems like body electronics and infotainment. The P4SMA43A-E3/5A shares identical electrical characteristics and SMA packaging with those qualified parts, enabling seamless qualification migration.
What does the "-E3/5A" suffix indicate in P4SMA43A-E3/5A?
The "-E3" denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads, while "/5A" specifies packaging in 13-inch diameter plastic tape-and-reel containing 7500 units - optimized for high-speed pick-and-place assembly. This differs from "/61", which indicates 7-inch reels with 1800 units. The P4SMA43A-E3/5A is not halogen-free (that requires M3 suffix) nor AEC-Q101 qualified (which requires HE3 or HM3), but retains full compatibility with standard reflow profiles including 260 °C peak temperature.
How does the P4SMA43A-E3/5A compare to bidirectional TVS diodes like P4SMA43CA?
The P4SMA43A-E3/5A is unidirectional and protects against positive transients only, with polarity marked by a cathode band; P4SMA43CA is bidirectional and suppresses surges of either polarity, lacking polarity marking. Both share identical VBR, VWM, and VC values, but the unidirectional P4SMA43A-E3/5A offers lower leakage (<1 µA at VWM) and supports forward conduction in crowbar circuits, whereas the bidirectional variant suits AC-coupled or differential signal paths where polarity reversal occurs.
What PCB layout considerations are critical for optimal performance of the P4SMA43A-E3/5A?
For effective transient energy dissipation, the P4SMA43A-E3/5A must be mounted on minimum recommended copper pads: 0.2" × 0.2" (5.0 mm × 5.0 mm) per terminal, per Vishay's datasheet. Trace inductance between the TVS and protected node must be minimized - ideally <2 mm - to prevent voltage overshoot during fast transients. Thermal vias under pads improve heat spreading, especially given its RθJA = 120 °C/W; improper layout can elevate junction temperature and reduce surge lifetime. The P4SMA43A-E3/5A performance is validated only with this pad geometry.
P4SMA43A-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:
- 1
- Bidirectional Channels:
- -
- 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)
P4SMA43A-E3/5A FAQ
1.How can I place an order for P4SMA43A-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA43A-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 P4SMA43A-E3/5A reliable?
The price and inventory of P4SMA43A-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 P4SMA43A-E3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA43A-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA43A-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA43A-E3/5A?
P4SMA43A-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA43A-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 P4SMA43A-E3/5A?
For technical support, including P4SMA43A-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA43A-E3/5A requirements.
6.How does Aetrix verify that P4SMA43A-E3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA43A-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 P4SMA43A-E3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA43A-E3/5A?
All P4SMA43A-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA43A-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 P4SMA43A-E3/5A part is unused and in its original packaging.
Return procedure for P4SMA43A-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA43A-E3/5A Tags
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