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Vishay General Semiconductor - Diodes Division P4SMA47AHM3_A/I
- Part No.:
- P4SMA47AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA47AHM3_A/I.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,576
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Product details
Overview
P4SMA47AHM3_A/I 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 47 V breakdown voltage (VBR = 44.7–49.4 V at IT = 1.0 mA), 400 W peak pulse power (10/1000 µs), 64.8 V maximum clamping voltage (VC) at IPPM, and 40.2 V stand-off voltage (VWM). It is AEC-Q101 qualified, halogen-free, RoHS-compliant, and used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial electronics.
For engineers reviewing the P4SMA47AHM3_A/I datasheet, P4SMA47AHM3_A/I pinout, P4SMA47AHM3_A/I application, or P4SMA47AHM3_A/I equivalent, key selection criteria include clamping performance under 10/1000 µs surge, thermal resistance (RθJA = 120 °C/W), unidirectional polarity marking, SMA (DO-214AC) package compatibility with automated placement, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
The P4SMA47AHM3_A/I operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 44.7–49.4 V breakdown range and clamping transient energy to ≤64.8 V at 6.2 A peak pulse current. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1.0 ns).
Rated for 3.3 W steady-state power dissipation and 40 A non-repetitive forward surge (8.3 ms half-sine), it supports operation from −65 °C to +150 °C junction temperature. The device meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive applications, with matte tin-plated leads solderable per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 44.7 V / 49.4 V at IT = 1.0 mA - defines precise avalanche onset threshold for reliable overvoltage detection |
| VWM | 40.2 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 64.8 V at 6.2 A - clamping voltage during 10/1000 µs surge, limiting downstream stress |
| PPPM | 400 W - peak transient power handling capability under standard 10/1000 µs waveform |
| RθJA | 120 °C/W - thermal resistance from junction to ambient, critical for PCB pad layout and derating above 25 °C |
| TJ max | +150 °C - maximum junction temperature enabling use in under-hood automotive environments |
| AEC-Q101 | Qualified - validated for automotive reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: SMA (DO-214AC) - low-profile, surface-mount plastic package with 0.208" × 0.157" outline, matte tin-plated leads, UL 94 V-0 molding compound, and cathode band marking for unidirectional polarity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to circuit ground or lower-potential node in unidirectional TVS configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line; band marking identifies this terminal for correct PCB orientation |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges without derating below 91 V |
| Glass passivated chip junction | Ensures stable VBR tolerance (±5%), low leakage (<1 µA), and long-term reliability under thermal cycling |
| AEC-Q101 qualification (HM3 suffix) | Validates suitability for automotive powertrain, body control, and ADAS modules requiring zero-failure field performance |
| MSL Level 1, 260 °C reflow compatible | Supports single-pass lead-free reflow assembly without moisture sensitivity concerns |
| Halogen-free & RoHS-compliant | Fulfills EU ELV and automotive OEM material compliance requirements for end-of-life recyclability |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting 12 V supply rails and LIN bus signal lines from load dump and inductive switching transients in vehicle door modules and lighting controllers. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and ground, clamping transients within 1 ns to prevent latch-up in microcontrollers and driver ICs. Use Value: Withstands 400 W surges while maintaining VC ≤ 64.8 V, ensuring downstream 5 V LDOs and CAN transceivers remain within absolute maximum ratings. |
Use Scenario: Safeguarding 24 V digital input channels of programmable logic controllers against field-wiring induced surges and electrostatic discharge. IC Role / Device Role / Timing Role: Standoff-rated TVS on each input channel, absorbing repetitive 10/1000 µs transients up to 300×/hour without degradation. Use Value: 40.2 V VWM allows full 24 V system margin; 64.8 V VC prevents damage to optocoupler input stages and FPGA I/O banks. |
| Consumer Appliance Motor Drive Board | Telecom Power Supply Front-End |
Use Scenario: Clamping flyback spikes from brushed DC motor commutation in washing machine and HVAC blower control boards. IC Role / Device Role / Timing Role: Mounted directly across motor terminals or H-bridge high-side FET drains to suppress >100 V inductive kick. Use Value: 40 A IFSM rating handles repeated 8.3 ms surge events; low RθJL = 30 °C/W enables direct thermal coupling to copper pour. |
Use Scenario: Secondary-side transient suppression on 48 V telecom rectifier outputs feeding base station RF amplifiers and backhaul interfaces. IC Role / Device Role / Timing Role: Unidirectional TVS on +48 V rail, coordinated with upstream MOVs and fuses to meet GR-1089-CORE Level 3 immunity. Use Value: 400 W PPPM and 64.8 V VC limit rail sag and prevent false triggering of overvoltage lockout in DC-DC controllers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ47A-E3/52 | Same VBR (44.7–49.4 V), but SMB package (DO-214AA); 600 W PPPM; higher RθJA (140 °C/W) | Higher surge rating suits less thermally optimized layouts; larger footprint may conflict with dense automotive PCBs | Select when board space permits and higher single-pulse margin is required over thermal efficiency |
| 1.5SMC47A | Same electrical specs, but SMC (DO-214AB) package; 1500 W PPPM; RθJA = 100 °C/W; no AEC-Q101 qualification | Designed for industrial/commercial use only; lacks automotive reliability validation and halogen-free certification | Choose for cost-sensitive non-automotive systems where AEC-Q101 is not mandated and higher surge headroom is needed |
Compared with SMBJ47A-E3/52 and 1.5SMC47A, P4SMA47AHM3_A/I delivers optimal balance of AEC-Q101 qualification, halogen-free compliance, compact SMA footprint, and verified 400 W surge capability-making it the preferred choice for space-constrained automotive and industrial designs requiring certified reliability.
Availability
P4SMA47AHM3_A/I is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O protection, and telecom power front-end designs requiring stable component supply, AEC-Q101 traceability, and halogen-free compliance.
Supply support for P4SMA47AHM3_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, TVS devices, and MOSFETs with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA series was developed to deliver high-power, surface-mount transient suppression for automotive and industrial systems where space, thermal performance, and qualification rigor are critical design constraints.
FAQ
What is the breakdown voltage tolerance for P4SMA47AHM3_A/I?
The P4SMA47AHM3_A/I has a breakdown voltage (VBR) range of 44.7 V to 49.4 V at test current IT = 1.0 mA, corresponding to a ±5 % tolerance about the nominal 47 V rating. This tight tolerance ensures consistent clamping behavior across production lots and supports precise overvoltage protection design in automotive and industrial applications where margin control is essential.
Is P4SMA47AHM3_A/I suitable for bidirectional transient suppression?
No, P4SMA47AHM3_A/I is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay offers the P4SMA47CA variant. Using P4SMA47AHM3_A/I in bidirectional configurations risks forward conduction during negative transients and failure to clamp-always verify polarity alignment in schematic and layout for P4SMA47AHM3_A/I.
What does the "HM3_A/I" suffix mean in P4SMA47AHM3_A/I?
In P4SMA47AHM3_A/I, "HM3" denotes halogen-free, RoHS-compliant, and AEC-Q101 qualified construction; "A" indicates the revision level per Vishay's internal documentation; "I" specifies packaging in 13" diameter tape-and-reel (7500 units/reel). This full suffix confirms automotive-grade material compliance, reliability validation, and logistics readiness for high-volume SMT production.
How does the thermal resistance of P4SMA47AHM3_A/I affect PCB layout?
P4SMA47AHM3_A/I has RθJA = 120 °C/W, meaning junction temperature rises 120 °C per watt dissipated without heatsinking. To maintain TJ ≤ 150 °C at full 3.3 W PD, PCB copper pads must follow Vishay's recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) layout per terminal. Reducing pad area increases thermal impedance and risks premature thermal runaway during sustained surge events.
Can P4SMA47AHM3_A/I replace older P4SMA47A-E3 parts in existing designs?
Yes, P4SMA47AHM3_A/I is a direct functional and mechanical replacement for P4SMA47A-E3, sharing identical electrical specs, SMA (DO-214AC) package dimensions, and pinout. The HM3 version adds AEC-Q101 qualification and halogen-free materials-no PCB or schematic changes are required, but qualification records and material declarations should be updated to reflect the enhanced automotive compliance.
P4SMA47AHM3_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):
- 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_A/I FAQ
1.How can I place an order for P4SMA47AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA47AHM3_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 P4SMA47AHM3_A/I reliable?
The price and inventory of P4SMA47AHM3_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 P4SMA47AHM3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA47AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA47AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA47AHM3_A/I?
P4SMA47AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA47AHM3_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 P4SMA47AHM3_A/I?
For technical support, including P4SMA47AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA47AHM3_A/I requirements.
6.How does Aetrix verify that P4SMA47AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA47AHM3_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 P4SMA47AHM3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA47AHM3_A/I?
All P4SMA47AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA47AHM3_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 P4SMA47AHM3_A/I part is unused and in its original packaging.
Return procedure for P4SMA47AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA47AHM3_A/I Tags
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