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Vishay General Semiconductor - Diodes Division P4SMA43AHM3/H
- Part No.:
- P4SMA43AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA43AHM3/H.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,511
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Product details
Overview
P4SMA43AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features 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 interfaces in industrial and automotive electronics.
For engineers reviewing the P4SMA43AHM3/H datasheet, P4SMA43AHM3/H pinout, P4SMA43AHM3/H application, or P4SMA43AHM3/H equivalent, this device is selected for robust ESD and surge protection where low-profile SMT placement, AEC-Q101 qualification, halogen-free RoHS compliance, and stable clamping under repetitive transients are required.
Technical Context
The P4SMA43AHM3/H operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%), low incremental surge resistance, and fast response time (<1 ns), enabling effective suppression of inductive switching spikes and lightning-induced surges.
Rated for 150 °C maximum junction temperature and MSL Level 1 moisture sensitivity, it delivers 3.3 W steady-state power dissipation on infinite heatsink at 50 °C and supports 40 A non-repetitive forward surge current (8.3 ms half-sine). The cathode band denotes polarity, and thermal resistance is 120 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 40.9 V / 45.2 V at 1 mA - defines precise avalanche onset range for reliable overvoltage triggering |
| VWM | 36.8 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | 59.3 V at 6.7 A - clamped voltage during 400 W transient, limiting stress on downstream components |
| PPPM | 400 W (10/1000 µs) - peak surge energy handling capacity under standardized test waveform |
| IFSM | 40 A (8.3 ms half-sine) - surge current capability for short-duration line faults or inrush events |
| TJ max | 150 °C - enables operation in under-hood automotive and high-temperature industrial environments |
| Package | SMA (DO-214AC) - industry-standard SMT footprint with 0.208" × 0.157" outline and matte tin-plated leads |
Pinout & Package
SMA (DO-214AC) package: surface-mount, molded plastic case with cathode band marking; terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional TVS configuration |
| Cathode | Avalanche conduction terminal | Marked by band; connected to protected line (e.g., 36.8 V rail or signal trace) to clamp transients to ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for modern industrial and automotive PCB assemblies |
| 400 W peak pulse power | Handles high-energy transients without degradation when mounted on recommended 5 mm × 5 mm copper pads |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for sensitive ICs |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without preconditioning or baking |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Suppresses load-dump spikes and alternator ripple on 12 V/24 V vehicle power buses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC converter input. Use Value: Clamps transients to ≤59.3 V, preventing damage to downstream PMICs and microcontrollers rated for 40 V absolute max. |
Use Scenario: Shields analog and digital signal lines (e.g., CAN, LIN, or I²C) from ESD and cable discharge events. IC Role / Device Role / Timing Role: TVS placed at connector entry point, shunting surge current to chassis ground. Use Value: Sub-1 ns response and low capacitance preserve signal integrity while meeting ISO 10605 ±30 kV contact discharge requirements. |
| Telecom Line Card Surge Protection | Consumer Power Adapter Input Protection |
|
Use Scenario: Protects AC/DC front-end rectifiers and primary-side controllers against lightning-induced surges on PoE or DSL lines. IC Role / Device Role / Timing Role: Mounted across bridge rectifier output or bulk capacitor input. Use Value: 400 W rating and 150 °C TJ max ensure sustained performance in enclosed telecom enclosures with limited airflow. |
Use Scenario: Guards secondary-side 5 V/12 V outputs of wall adapters against user-induced ESD and hot-plug transients. IC Role / Device Role / Timing Role: Unidirectional TVS between regulated output and ground, downstream of isolation barrier. Use Value: Low-profile SMA package fits tight board space; halogen-free construction satisfies IEC 62368-1 material requirements. |
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 | Same VBR range (40.9–45.2 V), but SMB package (DO-214AA); 600 W PPPM, higher IPPM (10.3 A) | Larger footprint; better suited for higher-energy surges where board space allows | Select SMBJ43A when 600 W surge margin is needed and PCB layout accommodates larger package |
| 1.5SMC43A | Same VBR and VC, but SMC (DO-214AB) package; 1500 W PPPM, 34.7 A IPPM | Substantially higher surge rating; requires larger pad area and thermal relief | Choose 1.5SMC43A for industrial mains-connected equipment requiring IEC 61000-4-5 Level 4 immunity |
Compared with SMBJ43A and 1.5SMC43A, the P4SMA43AHM3/H offers optimal balance of compact size, AEC-Q101 qualification, and 400 W surge capability - making it ideal for space-constrained automotive modules and consumer power supplies where halogen-free compliance is mandatory.
Availability
P4SMA43AHM3/H is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLC I/O modules, telecom line cards, and consumer power adapters requiring stable component supply, long-term lifecycle support, and certified environmental compliance.
Supply support for P4SMA43AHM3/H 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 automotive, industrial, and telecom systems - delivering consistent clamping performance, AEC-Q101 validation, and halogen-free packaging for next-generation electronics.
FAQ
What is the maximum clamping voltage of the P4SMA43AHM3/H under a 10/1000 µs surge?
The P4SMA43AHM3/H has a maximum clamping voltage (VC) of 59.3 V at 6.7 A peak pulse current, measured using the standardized 10/1000 µs waveform. This value ensures protected circuits remain below critical voltage thresholds during transient events. The P4SMA43AHM3/H achieves this clamping performance with low incremental resistance and fast avalanche response, making it suitable for safeguarding 3.3 V, 5 V, and 12 V logic and power rails.
Is the P4SMA43AHM3/H qualified for automotive applications?
Yes, the P4SMA43AHM3/H is AEC-Q101 qualified, as indicated by the "HM3" suffix and documented in Vishay's official specification (Document Number: 88367, Revision: 09-Jan-2024). This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, confirming suitability for under-hood and cabin electronics. The P4SMA43AHM3/H is explicitly listed in Vishay's AEC-Q101 qualified product matrix for the P4SMA family.
What does the "HM3" suffix signify in P4SMA43AHM3/H?
The "HM3" suffix in P4SMA43AHM3/H indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Per Vishay's ordering information, "HM3" denotes both environmental compliance (halogen-free molding compound) and automotive reliability validation. The trailing "/H" specifies packaging in 7" diameter tape-and-reel format with 1800 units per reel - a detail confirmed in the official ordering table on page 3 of Document 88367.
How does the P4SMA43AHM3/H compare to bidirectional TVS diodes like P4SMA43CA?
The P4SMA43AHM3/H is unidirectional and intended for DC line protection where polarity is fixed (e.g., +12 V rail to ground), whereas P4SMA43CA is bidirectional and used for AC or floating signal lines (e.g., RS-485, USB D+/D−). The P4SMA43AHM3/H provides lower leakage at VWM and avoids ambiguity in cathode orientation, but cannot suppress positive and negative transients on the same node without external biasing. Its design assumes defined anode/cathode connection per circuit topology.
What is the thermal resistance of the P4SMA43AHM3/H, and how does it affect layout?
The P4SMA43AHM3/H 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. This value implies that at 3.3 W steady-state dissipation, junction temperature rise above ambient will be ~396 °C - exceeding its 150 °C limit - so the device must operate in pulsed mode only. Layout must follow Vishay's pad dimensions and avoid excessive copper isolation to maintain specified surge ratings and thermal derating curves.
P4SMA43AHM3/H 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:
- Discontinued at Digi-Key
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA43AHM3/H FAQ
1.How can I place an order for P4SMA43AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA43AHM3/H 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 P4SMA43AHM3/H reliable?
The price and inventory of P4SMA43AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA43AHM3/H is usually 5 days.
3.What payment methods are accepted for P4SMA43AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA43AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA43AHM3/H?
P4SMA43AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA43AHM3/H 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 P4SMA43AHM3/H?
For technical support, including P4SMA43AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA43AHM3/H requirements.
6.How does Aetrix verify that P4SMA43AHM3/H is sourced from the original manufacturer or authorized distributors?
All P4SMA43AHM3/H 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 P4SMA43AHM3/H meets industry standards.
7.What is the process for return or replacement of P4SMA43AHM3/H?
All P4SMA43AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA43AHM3/H, 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 P4SMA43AHM3/H part is unused and in its original packaging.
Return procedure for P4SMA43AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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