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Vishay General Semiconductor - Diodes Division P4SMA47AHE3_A/I
- Part No.:
- P4SMA47AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA47AHE3_A/I.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA47AHE3_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), 40.2 V stand-off voltage (VWM), 64.8 V maximum clamping voltage (VC) at 6.2 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial power supplies.
For engineers reviewing the P4SMA47AHE3_A/I datasheet, P4SMA47AHE3_A/I pinout, P4SMA47AHE3_A/I application, or P4SMA47AHE3_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 transient suppression design.
Technical Context
This TVS diode operates as a unidirectional clamping device with avalanche breakdown behavior, triggered when reverse voltage exceeds VBR. Its glass-passivated junction ensures stable leakage performance (<1.0 µA at VWM) and fast response time (<1 ns), enabling protection against ESD, inductive switching spikes, and lightning-induced surges.
Rated for 150 °C maximum junction temperature and compliant with J-STD-020 MSL Level 1 (peak reflow 260 °C), the P4SMA47AHE3_A/I supports automated SMT assembly. Its 3.3 W steady-state power dissipation and 40 A non-repetitive forward surge capability (8.3 ms half-sine) support robust operation in 12 V/24 V automotive and industrial DC 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 onset range for reliable clamping threshold |
| VWM | 40.2 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 64.8 V at 6.2 A - clamped voltage during 400 W 10/1000 µs transient, limiting downstream stress |
| IPPM | 6.2 A - peak pulse current handling capacity under standardized surge waveform |
| PPPM | 400 W - peak pulse power rating for 10/1000 µs waveform, derated above 25 °C ambient |
| RθJA | 120 °C/W - thermal resistance from junction to ambient, critical for PCB copper pad layout (0.2" × 0.2") |
| TJ max | +150 °C - maximum junction temperature, supporting operation in under-hood automotive environments |
Pinout & Package
Package: SMA (DO-214AC) - surface-mount, low-profile plastic case with matte tin-plated leads, UL 94 V-0 rated molding compound, and polarity indicated by cathode band on unidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; conducts during forward surge (e.g., reverse battery events) |
| Cathode | Avalanche clamping terminal | Marked with band; connected to higher-potential side; initiates clamping when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage (<1 µA) over lifetime and temperature extremes |
| 400 W peak pulse power | Withstands high-energy transients common in 24 V industrial control and automotive power distribution |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; compatible with 260 °C peak profile per J-STD-020 |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for sensitive ICs |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Suppressing load-dump and jump-start transients on 12 V/24 V vehicle power buses feeding ECUs and body controllers. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between power rail and ground, activated within nanoseconds of overvoltage event. Use Value: Limits rail voltage to ≤64.8 V during 400 W surges, preventing damage to 36 V-rated CAN transceivers and microcontrollers. |
Use Scenario: Protecting analog output lines (e.g., 4–20 mA current loops) of pressure/temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Standoff-mode protector mounted across signal and return, conducting only during >40.2 V fault conditions. Use Value: Maintains signal integrity below VWM, while clamping induced surges from nearby motor drives to safe levels for ADC front-ends. |
| Telecom DC Power Input Protection | Consumer Device USB Power Port Protection |
|
Use Scenario: Safeguarding primary DC input of PoE-powered network switches against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-stage transient suppressor on 48 V input rail, upstream of DC-DC converters and hot-swap controllers. Use Value: Absorbs up to 400 W energy without degradation, meeting IEC 61000-4-5 Level 3 (1 kV/2 Ω) requirements. |
Use Scenario: Preventing USB-C port damage from electrostatic discharge or accidental 20 V PD adapter misconnection in portable speakers. IC Role / Device Role / Timing Role: Unidirectional clamp between VBUS and GND, leveraging fast <1 ns response to divert ESD pulses. Use Value: Provides 30 kV air-gap ESD immunity per IEC 61000-4-2 while maintaining <1 µA leakage at 5 V nominal operation. |
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 (44.7–49.4 V), but lower PPPM = 400 W only at TA ≤ 25 °C; RθJA = 135 °C/W vs. 120 °C/W | Less effective thermal performance on compact PCBs; requires larger copper area for equivalent power handling | Select when cost sensitivity outweighs thermal margin needs and AEC-Q101 is not required |
| 1.5SMC47A | Higher PPPM = 1500 W, DO-214AB package (larger footprint), VC = 77 V at 19.3 A - less precise clamping | Better for high-energy surges but incompatible with space-constrained SMA layouts and tighter VC budgets | Choose only if system-level surge tests exceed 400 W and board real estate allows larger SMC package |
Compared with SMAJ47A-E3/5A and 1.5SMC47A, the P4SMA47AHE3_A/I delivers superior thermal efficiency in the same SMA footprint and AEC-Q101 validation for automotive use - making it optimal for space-limited, high-reliability 24 V rail protection where clamping precision and qualification matter.
Availability
P4SMA47AHE3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom power supply designs requiring stable component supply, AEC-Q101 compliance, and consistent 400 W transient suppression performance.
Supply support for P4SMA47AHE3_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, power efficiency, and automotive qualification.
The P4SMA series was developed specifically for surface-mount transient suppression in harsh environments, combining high pulse power density, AEC-Q101 validation, and industry-standard SMA packaging for broad adoption in automotive and industrial power systems.
FAQ
What is the breakdown voltage tolerance of the P4SMA47AHE3_A/I?
The P4SMA47AHE3_A/I has a specified breakdown voltage range of 44.7 V to 49.4 V at 1.0 mA test current, representing ±5% tolerance around the nominal 47 V rating. This tight VBR window ensures predictable clamping onset across production lots and temperature ranges, critical for protecting 36 V-rated components in automotive applications. The P4SMA47AHE3_A/I maintains this specification per Vishay Document Number 88367, Revision 09-Jan-2024.
Is the P4SMA47AHE3_A/I suitable for bidirectional transient protection?
No, the P4SMA47AHE3_A/I is a unidirectional TVS diode, identifiable by its cathode band marking and specified parameters (VBR, VWM, VC) for reverse-biased operation only. For bidirectional protection, Vishay offers the P4SMA47CA variant. Using the P4SMA47AHE3_A/I in bidirectional configurations risks forward conduction during positive transients and inadequate clamping - always verify polarity alignment in circuit design for the P4SMA47AHE3_A/I.
Does the P4SMA47AHE3_A/I require derating at elevated ambient temperatures?
Yes, the P4SMA47AHE3_A/I must be derated above 25 °C ambient per Figure 2 in Vishay Document 88367. Its 400 W peak pulse power rating decreases linearly with junction temperature, reaching ~300 W at 85 °C ambient on standard 0.2" × 0.2" copper pads. Designers must apply thermal modeling using RθJA = 120 °C/W and ensure TJ remains ≤150 °C during surge events - a key constraint when applying the P4SMA47AHE3_A/I in enclosed industrial enclosures.
What does the "HE3_A/I" suffix indicate in P4SMA47AHE3_A/I?
The "HE3" denotes RoHS-compliant construction with AEC-Q101 qualification; "A" specifies the revision level per Vishay's internal coding; and "I" indicates packaging in 13" diameter tape-and-reel (7500 units per reel). This full suffix confirms the P4SMA47AHE3_A/I meets automotive reliability standards and is optimized for high-volume SMT assembly - distinguishing it from commercial-grade E3 or M3 variants without AEC-Q101 validation.
How does the P4SMA47AHE3_A/I compare to older P4KE47A through-hole TVS diodes?
The P4SMA47AHE3_A/I replaces through-hole P4KE47A in SMT designs with identical electrical specs (VBR, VC, PPPM) but in a smaller SMA (DO-214AC) package - reducing PCB area by ~60%. It adds AEC-Q101 qualification, MSL Level 1 reflow compatibility, and lower thermal resistance (120 vs. 150 °C/W), enabling higher power density in modern automotive ECUs. Unlike P4KE47A, the P4SMA47AHE3_A/I is not drop-in compatible due to different footprint and soldering requirements.
P4SMA47AHE3_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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA47AHE3_A/I FAQ
1.How can I place an order for P4SMA47AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA47AHE3_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 P4SMA47AHE3_A/I reliable?
The price and inventory of P4SMA47AHE3_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 P4SMA47AHE3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA47AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA47AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA47AHE3_A/I?
P4SMA47AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA47AHE3_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 P4SMA47AHE3_A/I?
For technical support, including P4SMA47AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA47AHE3_A/I requirements.
6.How does Aetrix verify that P4SMA47AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA47AHE3_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 P4SMA47AHE3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA47AHE3_A/I?
All P4SMA47AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA47AHE3_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 P4SMA47AHE3_A/I part is unused and in its original packaging.
Return procedure for P4SMA47AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA47AHE3_A/I Tags
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