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Vishay General Semiconductor - Diodes Division P4SMA47AHM3/H
- Part No.:
- P4SMA47AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA47AHM3/H.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA47AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 47 V breakdown voltage (VBR = 44.7–49.4 V at IT = 1.0 mA), 64.8 V maximum clamping voltage (VC) at 6.2 A peak pulse current, and 400 W peak pulse power (10/1000 µs waveform). It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients in industrial and automotive electronics.
For engineers reviewing the P4SMA47AHM3/H datasheet, P4SMA47AHM3/H pinout, P4SMA47AHM3/H application, or P4SMA47AHM3/H equivalent, key selection criteria include its AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, 150 °C max junction temperature, and verified clamping performance under repetitive surge conditions per JESD22-B102 and MSL Level 1 (260 °C reflow).
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging glass-passivated silicon junction technology for fast response (<1 ns) and low incremental surge resistance. Its thermal design relies on 0.2" × 0.2" copper pads per terminal to sustain 400 W peak pulse power - derated above 25 °C per Fig. 2 of the datasheet.
The P4SMA47AHM3/H exhibits a 0.101 %/°C temperature coefficient of VBR, ensuring stable breakdown across -65 °C to +150 °C operating range. It meets UL 497B recognition (QVGQ2) and supports automated SMT placement due to its low-profile SMA package and matte tin-plated leads compliant with J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 44.7 V / 49.4 V at 1.0 mA test current - defines precise voltage threshold where avalanche conduction begins under transient stress |
| VWM | 40.2 V - maximum continuous reverse working voltage; circuit must operate below this to avoid leakage-induced power loss |
| VC @ IPPM | 64.8 V at 6.2 A - clamped voltage seen by protected IC during worst-case 10/1000 µs surge; determines downstream overvoltage margin |
| PPPM | 400 W - peak pulse power handling capability with 10/1000 µs waveform; enables protection against high-energy inductive spikes |
| IFSM | 40 A - non-repetitive forward surge rating (8.3 ms half-sine); supports robustness during accidental polarity reversal events |
| TJ max | +150 °C - maximum junction temperature; allows operation in under-hood automotive or high-ambient industrial environments |
| RθJA | 120 °C/W - junction-to-ambient thermal resistance; informs PCB copper pad sizing requirements for thermal management |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads; cathode identified by black band; meets UL 94 V-0 flammability rating and J-STD-020 MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance reference plane; completes clamping loop during positive transients |
| Cathode | Avalanche conduction node / protected line interface | Connected to the line being protected (e.g., sensor supply or data line); conducts when VAK exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control and ADAS modules |
| Halogen-free & RoHS-compliant | Meets IEC 61249-2-21 and JEDEC J-STD-203; eliminates brominated flame retardants without compromising UL 94 V-0 rating |
| 400 W peak pulse power (10/1000 µs) | Withstands high-energy transients from relay coil de-energization or motor commutation in industrial PLC I/O stages |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns response), preserving timing margins in high-speed sensor interfaces |
| MSL Level 1 moisture sensitivity | Enables standard SMT assembly without dry-pack or baking; compatible with high-throughput pick-and-place systems |
Applications
| Automotive Sensor Protection | Industrial PLC Input Protection |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay environments subject to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between sensor VOUT and ground to shunt transients before reaching ADC input stage. Use Value: Limits clamped voltage to 64.8 V at 6.2 A, preventing damage to 3.3 V or 5 V rail-tied signal conditioning ICs while maintaining AEC-Q101 compliance. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers exposed to inductive kickback from solenoid valves. IC Role / Device Role / Timing Role: Standoff-rated TVS (VWM = 40.2 V) placed across input terminals to clamp surges before optocoupler input stage. Use Value: Withstands 400 W pulses without degradation, enabling >100,000 surge cycles per IEC 61000-4-5 Level 4 compliance testing. |
| Telecom Line Interface Protection | Consumer Power Supply Surge Clamping |
|
Use Scenario: Secondary-side transient suppression on DC bias lines feeding RF front-end modules in base station radios. IC Role / Device Role / Timing Role: Fast-response TVS connected between DC feed and RF IC ground to absorb ESD and lightning-induced surges. Use Value: Sub-1 ns response time and 64.8 V clamping ensure RF ICs remain within absolute maximum ratings during 8 kV contact ESD events. |
Use Scenario: Output rail protection in AC/DC adapters for smart home devices subjected to mains-borne surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Unidirectional TVS installed between regulated 5 V/12 V output and common ground to suppress differential-mode transients. Use Value: 400 W rating and 150 °C TJ max allow sustained operation in enclosed enclosures without thermal runaway risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ47A-E3/5A | Same VBR range (44.7–49.4 V), but lower PPPM = 400 W only at TA ≤ 25 °C; no AEC-Q101 qualification; MSL Level 1 confirmed. | Commercial-grade use only; not validated for automotive temperature cycling or humidity testing. | Select when cost sensitivity outweighs automotive qualification requirements and ambient temperature remains <50 °C. |
| 1.5SMC47A | Higher package thermal mass (DO-214AB), RθJA = 100 °C/W; identical VBR/VC specs but larger footprint; AEC-Q101 not claimed. | Preferred for high-power, low-frequency surge scenarios where board space permits larger SMC package. | Choose for legacy designs using DO-214AB footprints or where higher thermal inertia improves long-pulse survivability. |
Compared with P4SMA47AHM3/H, SMAJ47A-E3/5A offers identical electrical clamping but lacks automotive qualification and tighter thermal derating, while 1.5SMC47A provides better thermal dissipation in larger packages but requires PCB layout change and omits AEC-Q101 validation.
Availability
P4SMA47AHM3/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom power interface circuits requiring stable component supply, halogen-free compliance, and AEC-Q101 assurance.
Supply support for P4SMA47AHM3/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, 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 SMT applications, targeting automotive, industrial, and telecom markets where AEC-Q101 qualification and consistent clamping performance are mandatory.
FAQ
What is the exact breakdown voltage range for P4SMA47AHM3/H?
The P4SMA47AHM3/H has a guaranteed breakdown voltage range of 44.7 V to 49.4 V at a test current of 1.0 mA, as specified in the Vishay datasheet revision 09-Jan-2024. This VBR window ensures predictable avalanche initiation during overvoltage events while maintaining compatibility with 47 V nominal system rails. The P4SMA47AHM3/H's tight tolerance supports reliable coordination with downstream overvoltage protection thresholds.
Does P4SMA47AHM3/H meet automotive qualification standards?
Yes, the P4SMA47AHM3/H is AEC-Q101 qualified, as indicated by the "HM3" suffix denoting halogen-free, RoHS-compliant, and automotive-grade construction. It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 Rev D. This makes the P4SMA47AHM3/H suitable for under-hood and chassis-mounted applications where reliability under thermal and mechanical stress is critical.
What is the maximum clamping voltage of P4SMA47AHM3/H under surge conditions?
The P4SMA47AHM3/H clamps to a maximum of 64.8 V at 6.2 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This VC value is measured with the device mounted on 0.2" × 0.2" copper pads per terminal. The low clamping ratio (VC/VBR ≈ 1.38) confirms effective transient energy diversion without overstressing protected ICs, a key design advantage of the P4SMA47AHM3/H.
Can P4SMA47AHM3/H be used in bidirectional configurations?
No, the P4SMA47AHM3/H is a unidirectional TVS diode, as confirmed by its part number suffix "A" (not "CA") and explicit designation in the Vishay datasheet. Bidirectional variants such as P4SMA47CHM3/H exist separately. Using the P4SMA47AHM3/H in reverse-biased AC applications would result in forward conduction and potential failure; always verify polarity marking (cathode band) during layout for the P4SMA47AHM3/H.
What packaging and moisture sensitivity level does P4SMA47AHM3/H have?
The P4SMA47AHM3/H is supplied in 7" diameter plastic tape and reel (H carrier code), with 1800 units per reel. It meets J-STD-020 Moisture Sensitivity Level 1, allowing indefinite floor life at ≤30 °C/60% RH and standard reflow profiling up to 260 °C peak without preconditioning. This MSL Level 1 rating simplifies manufacturing logistics and eliminates baking steps for the P4SMA47AHM3/H in high-volume SMT lines.
P4SMA47AHM3/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):
- 40.2V
- Voltage - Breakdown (Min):
- 44.7V
- Voltage - Clamping (Max) @ Ipp:
- 64.8V
- Current - Peak Pulse (10/1000µs):
- 6.2A
- 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)
P4SMA47AHM3/H FAQ
1.How can I place an order for P4SMA47AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA47AHM3/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 P4SMA47AHM3/H reliable?
The price and inventory of P4SMA47AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA47AHM3/H is usually 5 days.
3.What payment methods are accepted for P4SMA47AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA47AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA47AHM3/H?
P4SMA47AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA47AHM3/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 P4SMA47AHM3/H?
For technical support, including P4SMA47AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA47AHM3/H requirements.
6.How does Aetrix verify that P4SMA47AHM3/H is sourced from the original manufacturer or authorized distributors?
All P4SMA47AHM3/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 P4SMA47AHM3/H meets industry standards.
7.What is the process for return or replacement of P4SMA47AHM3/H?
All P4SMA47AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA47AHM3/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 P4SMA47AHM3/H part is unused and in its original packaging.
Return procedure for P4SMA47AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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