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Vishay General Semiconductor - Diodes Division P4SMA43AHM3_A/I
- Part No.:
- P4SMA43AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA43AHM3_A/I.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,156
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Product details
Overview
P4SMA43AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the P4SMA series, designed for clamping fast-rising ESD and surge transients on power and signal lines. It features a 43 V breakdown voltage (VBR = 40.9–45.2 V at IT = 1.0 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 automotive and industrial power supplies.
For engineers reviewing the P4SMA43AHM3_A/I datasheet, P4SMA43AHM3_A/I pinout, P4SMA43AHM3_A/I application, or P4SMA43AHM3_A/I equivalent, key selection criteria include its AEC-Q101 qualification, SMA (DO-214AC) package compatibility, unidirectional polarity with cathode band marking, and thermal resistance (RθJA = 120 °C/W) for board-level thermal design.
Technical Context
The P4SMA43AHM3_A/I operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its specified VBR range (40.9–45.2 V), then clamping transient energy to ≤59.3 V at 6.7 A. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM).
It delivers 400 W peak pulse power per 10/1000 µs waveform under derated conditions (300 W above 91 V), with a maximum junction temperature of +150 °C and MSL Level 1 moisture sensitivity. The device supports automated SMT placement and meets JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 40.9 V / 45.2 V at IT = 1.0 mA - defines reliable avalanche initiation threshold for overvoltage protection |
| VWM | 36.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 59.3 V at 6.7 A - clamping voltage during 10/1000 µs surge, limiting stress on downstream components |
| PPPM | 400 W - peak transient power handling capability, enabling robust protection against IEC 61000-4-5 surges |
| RθJA | 120 °C/W - junction-to-ambient thermal resistance, guiding PCB copper pad sizing (0.2" × 0.2") for thermal reliability |
| TJ max | +150 °C - maximum junction temperature, supporting operation in under-hood automotive environments |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. Cathode indicated by a band on the body; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (unidirectional) | Connected to lower-potential side of protected line; conducts during forward-biased faults |
| Cathode | Reverse breakdown terminal (unidirectional) | Marked end; connected to higher-potential side; avalanches during overvoltage events to clamp voltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| 400 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 surge immunity without external heat sinking |
| Glass-passivated junction | Ensures stable VBR tolerance and low long-term parameter drift under thermal cycling |
| MSL Level 1 (260 °C peak reflow) | Enables single-pass lead-free reflow assembly without moisture-related popcorn failure |
| Halogen-free & RoHS-compliant (HM3 suffix) | Fulfills environmental compliance for global automotive OEM supply chains |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load-dump and ISO 7637-2 transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp surges before they reach LDOs or microcontrollers. Use Value: Limits voltage to ≤59.3 V during 6.7 A transients, preventing latch-up or gate oxide damage in downstream ICs. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors from ESD and cable-induced noise. IC Role / Device Role / Timing Role: Low-capacitance TVS on signal lines (e.g., 4–20 mA loop or CAN stubs) to absorb sub-100 ns ESD events. Use Value: Sub-1 ns response time and <1.0 µA leakage at 36.8 V preserve signal integrity and measurement accuracy. |
| Telecom DC Power Input Protection | Consumer Device USB Port Protection |
|
Use Scenario: Safeguarding PoE-powered switches and base stations against lightning-induced surges on 48 V input rails. IC Role / Device Role / Timing Role: Primary clamping device upstream of DC-DC converters, coordinated with MOVs for multi-stage protection. Use Value: 400 W rating and 150 °C TJ max enable sustained operation in enclosed telecom enclosures without derating. |
Use Scenario: Adding secondary surge protection to USB VBUS lines in portable audio/video devices. IC Role / Device Role / Timing Role: Standoff-rated TVS (36.8 V) placed after primary fuse and upstream of USB controller's internal protection. Use Value: Prevents false triggering during normal 5 V operation while clamping >15 kV contact ESD per IEC 61000-4-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A-E3/52 (Vishay) | Same VBR range (40.9–45.2 V) but SMB (DO-214AA) package; 600 W PPPM; RθJA = 100 °C/W | Higher power handling and better thermal performance, but 25 % larger footprint | Select when board space allows and higher surge margin (e.g., industrial motor drives) is required |
| 1.5SMC43A (ON Semiconductor) | Identical VBR, VWM, VC, and PPPM; same SMA package; not AEC-Q101 qualified | Lacks automotive qualification; suitable for commercial/industrial use only | Choose for cost-sensitive non-automotive designs where AEC-Q101 is not mandated |
Compared with SMBJ43A-E3/52, P4SMA43AHM3_A/I offers smaller footprint and AEC-Q101 compliance but lower peak power; versus 1.5SMC43A, it adds automotive qualification and halogen-free construction without sacrificing electrical specs.
Availability
P4SMA43AHM3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom power supply designs requiring stable component supply, AEC-Q101 validation, and halogen-free compliance.
Supply support for P4SMA43AHM3_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 was developed for high-reliability transient suppression in space-constrained, thermally demanding environments - particularly automotive, industrial, and telecom infrastructure where consistent clamping and long-term stability are critical.
FAQ
What is the breakdown voltage tolerance of the P4SMA43AHM3_A/I?
The P4SMA43AHM3_A/I has a specified breakdown voltage (VBR) range of 40.9 V to 45.2 V at test current IT = 1.0 mA, representing ±5 % tolerance around the nominal 43 V rating. This tight tolerance ensures predictable clamping behavior across production lots and temperature ranges, critical for protecting sensitive 3.3 V or 5 V logic rails downstream.
Is the P4SMA43AHM3_A/I suitable for bidirectional transient protection?
No, the P4SMA43AHM3_A/I is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay offers the P4SMA43CA variant. Using P4SMA43AHM3_A/I in bidirectional applications would result in forward conduction during negative transients, potentially damaging the device or failing to suppress.
Does the P4SMA43AHM3_A/I require a heatsink for 400 W surge handling?
No, the P4SMA43AHM3_A/I achieves its 400 W peak pulse power rating with a standard 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad per terminal - no external heatsink needed. Its RθJA = 120 °C/W is characterized under this layout; reducing pad area or adding thermal vias will degrade surge capability and must be validated per JEDEC standards.
What does the "HM3_A/I" suffix mean in P4SMA43AHM3_A/I?
The "HM3" denotes halogen-free, RoHS-compliant construction; "A" indicates AEC-Q101 qualification for automotive use; "I" specifies packaging in 13" diameter tape-and-reel (7500 units/reel). This full suffix confirms the part meets automotive reliability, environmental, and logistics requirements - distinct from commercial-grade "E3" or non-qualified "A" variants.
How does the P4SMA43AHM3_A/I perform under repeated surge stress?
The P4SMA43AHM3_A/I is rated for repetitive surges at 0.01 % duty cycle (e.g., 1 pulse per 10 s), maintaining VBR stability and leakage <1.0 µA after 1000 pulses. Its glass-passivated junction and AEC-Q101 qualification ensure no parametric shift or catastrophic failure under defined repetitive stress, making it suitable for cyclic industrial equipment protection.
P4SMA43AHM3_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:
- 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_A/I FAQ
1.How can I place an order for P4SMA43AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA43AHM3_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 P4SMA43AHM3_A/I reliable?
The price and inventory of P4SMA43AHM3_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 P4SMA43AHM3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA43AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA43AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA43AHM3_A/I?
P4SMA43AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA43AHM3_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 P4SMA43AHM3_A/I?
For technical support, including P4SMA43AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA43AHM3_A/I requirements.
6.How does Aetrix verify that P4SMA43AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA43AHM3_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 P4SMA43AHM3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA43AHM3_A/I?
All P4SMA43AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA43AHM3_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 P4SMA43AHM3_A/I part is unused and in its original packaging.
Return procedure for P4SMA43AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA43AHM3_A/I Tags
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