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Vishay General Semiconductor - Diodes Division P4SMA47AHM3/I
- Part No.:
- P4SMA47AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA47AHM3/I.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,870
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Product details
Overview
P4SMA47AHM3/I 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/I datasheet, P4SMA47AHM3/I pinout, P4SMA47AHM3/I application, or P4SMA47AHM3/I equivalent, this device delivers AEC-Q101 qualification, halogen-free RoHS compliance, MSL Level 1 moisture sensitivity, and verified clamping performance under repetitive surge conditions - critical for automotive-grade ESD and load-dump protection design.
Technical Context
The P4SMA47AHM3/I operates as a unidirectional avalanche diode with glass-passivated junction, enabling fast response (<1 ns) to transient overvoltages and low incremental surge resistance for stable clamping. Its 47 V nominal breakdown supports systems where DC bus or supply rail protection must tolerate up to ±10 % tolerance while maintaining robust standoff (VWM = 40.2 V).
Designed for surface-mount assembly on 0.2" × 0.2" copper pads, it delivers 3.3 W steady-state power dissipation at TA = 50 °C and handles 40 A non-repetitive forward surge (8.3 ms half-sine), making it suitable for both primary and secondary-level protection in 24 V and 48 V industrial control rails.
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 avalanche initiation window for predictable clamping onset |
| VWM | 40.2 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA, ensuring no false triggering |
| VC @ IPPM | 64.8 V at 6.2 A - clamping voltage during 10/1000 µs surge, limiting protected circuit stress to safe margin below 70 V |
| PPPM | 400 W - peak pulse power handling capability, sufficient for ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 3 surges |
| IFSM | 40 A - single half-sine surge rating (8.3 ms), supporting high-energy load dump events in automotive 12 V/24 V systems |
| TJ max | +150 °C - maximum junction temperature, enabling operation in under-hood or industrial enclosure environments |
| Package | SMA (DO-214AC) - industry-standard SMD outline with 5.28 mm length, 4.50 mm width, and 2.29 mm height for automated placement |
Pinout & Package
SMA (DO-214AC) package with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; cathode indicated by band marking; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to system ground or lower-potential node; enables low-VF path during surge clamp |
| Cathode | Current exit terminal during reverse-biased clamping | Connected to protected line (e.g., 24 V rail or sensor input); absorbs transient energy into ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets global environmental regulations without compromising thermal or electrical performance |
| 400 W peak pulse power (10/1000 µs) | Supports repeated surge events in industrial motor drives and power supply inputs without degradation |
| MSL Level 1 (260 °C peak reflow) | Enables single-pass lead-free reflow assembly without moisture-induced popcorn failure |
| Glass-passivated junction | Ensures long-term reliability and stable VBR drift < ±5 % over 1000 hrs at TJ = 125 °C |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and relay driver outputs from load dump and inductive kickback in 12 V vehicle networks. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground, clamping transients within 1 ns to prevent latch-up in microcontrollers and drivers. Use Value: Withstands 40 A surge (8.3 ms) and maintains VC ≤ 64.8 V, keeping downstream ICs within absolute maximum ratings during battery disconnect events. |
Use Scenario: Shielding 24 V digital input channels of programmable logic controllers from field-wiring induced surges and ESD. IC Role / Device Role / Timing Role: Primary overvoltage clamp on each input channel, positioned upstream of optocoupler or Schmitt trigger interface. Use Value: 400 W pulse rating ensures immunity to IEC 61000-4-5 Level 3 (2 kV/12 Ω) surges without derating or parallel staging. |
| Telecom Power Supply Input Stage | Automotive Camera Sensor Signal Line |
Use Scenario: Safeguarding AC/DC and DC/DC converter inputs against lightning-induced surges and AC line transients. IC Role / Device Role / Timing Role: First-line transient suppressor on bulk input rail, coordinated with MOVs and fuses for staged protection. Use Value: Low clamping ratio (VC/VBR ≈ 1.38) minimizes voltage overshoot across filter capacitors and reduces stress on upstream rectifiers. |
Use Scenario: Protecting FPD-Link III or GMSL serial video interfaces in rear-view and surround-view cameras from cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS on differential data pair, grounded via short trace to chassis. Use Value: Junction capacitance < 100 pF at VWM preserves signal integrity up to 3 Gbps while clamping ESD > ±15 kV (HBM). |
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 range (44.7–49.4 V), but SMB package (DO-214AA) with higher thermal resistance (RθJA = 140 °C/W vs. 120 °C/W) | Lower power density; less suitable for high-duty-cycle surges in compact layouts | Select when board space allows larger footprint and thermal management is less constrained |
| 1.5SMC47A | Same electrical specs but SMC (DO-214AB) package with 1.5 kW peak power rating and higher IPPM (12.5 A) | Over-engineered for 400 W requirements; adds cost and size without benefit for standard automotive transients | Choose only if future-proofing for ISO 16750-2 Pulse 5b (100 V/10 Ω) is required |
Compared with SMBJ47A-E3/52, P4SMA47AHM3/I offers better thermal performance in space-constrained designs; versus 1.5SMC47A, it provides optimal cost-performance balance for AEC-Q101-compliant 400 W surge protection without over-specification.
Availability
P4SMA47AHM3/I is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input protection, and telecom power supply surge hardening requiring stable component supply, halogen-free compliance, and AEC-Q101 qualification.
Supply support for P4SMA47AHM3/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, automotive qualification, and high-volume manufacturability.
The P4SMA series targets surface-mount transient suppression in automotive, industrial, and telecom applications, delivering standardized TVS performance with AEC-Q101 variants, halogen-free options, and tight parametric control across voltage grades.
FAQ
What is the maximum clamping voltage of the P4SMA47AHM3/I under a 10/1000 µs surge?
The P4SMA47AHM3/I has a maximum clamping voltage (VC) of 64.8 V at 6.2 A peak pulse current (IPPM) under a 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet 88367 and reflects worst-case clamping performance at TA = 25 °C with recommended PCB pad layout. The P4SMA47AHM3/I maintains this clamping level consistently across its operational temperature range.
Is the P4SMA47AHM3/I qualified for automotive applications?
Yes, the P4SMA47AHM3/I is AEC-Q101 qualified, as confirmed by the HM3 suffix and documentation in Vishay's P4SMA Series datasheet (Rev. 09-Jan-2024, Doc. #88367). It meets stress test requirements for temperature cycling, humidity bias, and mechanical shock applicable to automotive electronic modules. The P4SMA47AHM3/I is approved for use in body control units, lighting drivers, and sensor interfaces in passenger vehicles.
What does the "HM3" suffix indicate in P4SMA47AHM3/I?
The "HM3" suffix in P4SMA47AHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification and packaging in 13" tape-and-reel (I-type carrier). Per Vishay's ordering information table, HM3 indicates compliance with JEDEC J-STD-020 MSL Level 1 and whisker resistance per JESD 201 Class 2. The P4SMA47AHM3/I is not merely commercial-grade - the HM3 designation confirms full automotive reliability validation.
Can the P4SMA47AHM3/I be used in bidirectional configurations?
No, the P4SMA47AHM3/I is a unidirectional TVS diode, as indicated by the "A" suffix (not "CA") and explicit labeling in the Vishay datasheet's electrical characteristics table. Bidirectional variants use the CA suffix (e.g., P4SMA47CA). Using the P4SMA47AHM3/I in bidirectional circuits would result in forward conduction during negative transients, causing failure. For symmetric protection, select P4SMA47CHM3/I instead.
What is the standoff voltage (VWM) of the P4SMA47AHM3/I, and why does it matter?
The standoff voltage (VWM) of the P4SMA47AHM3/I is 40.2 V - the maximum DC or continuous reverse voltage it can block without exceeding 1.0 µA leakage current. This parameter ensures the P4SMA47AHM3/I remains non-conductive during normal operation of a 36–40 V system (e.g., 24 V automotive with 100 % tolerance), preventing power loss or false triggering while allowing reliable clamping above that threshold.
P4SMA47AHM3/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:
- 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/I FAQ
1.How can I place an order for P4SMA47AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA47AHM3/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/I reliable?
The price and inventory of P4SMA47AHM3/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/I is usually 5 days.
3.What payment methods are accepted for P4SMA47AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA47AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA47AHM3/I?
P4SMA47AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA47AHM3/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/I?
For technical support, including P4SMA47AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA47AHM3/I requirements.
6.How does Aetrix verify that P4SMA47AHM3/I is sourced from the original manufacturer or authorized distributors?
All P4SMA47AHM3/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/I meets industry standards.
7.What is the process for return or replacement of P4SMA47AHM3/I?
All P4SMA47AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA47AHM3/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/I part is unused and in its original packaging.
Return procedure for P4SMA47AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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