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Vishay General Semiconductor - Diodes Division 1.5SMC47A-E3/9AT
- Part No.:
- 1.5SMC47A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC47A-E3/9AT.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:4,980
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Product details
Overview
1.5SMC47A-E3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 47 V breakdown voltage (VBR = 44.7–49.4 V at 1 mA), 40.2 V stand-off voltage (VWM), 64.8 V maximum clamping voltage (VC) at 23.1 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O protection, and DC power rail surge suppression.
For engineers reviewing the 1.5SMC47A-E3/9AT datasheet, 1.5SMC47A-E3/9AT pinout, 1.5SMC47A-E3/9AT application, or 1.5SMC47A-E3/9AT equivalent, this page delivers verified electrical parameters, SMC (DO-214AB) package details, clamping performance under surge conditions, thermal resistance data, and RoHS-compliant commercial-grade sourcing context for production design-in.
Technical Context
The 1.5SMC47A-E3/9AT operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold to clamp transients. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1 µA at VWM), while the 10/1000 µs waveform compliance enables standardized surge immunity testing per IEC 61000-4-5.
Thermal design is supported by RθJA = 75 °C/W (typ.) and RθJL = 15 °C/W (typ.), with derating above 25 °C ambient per Fig. 2. The device is rated for TJ = –65 to +150 °C and meets MSL Level 1 (260 °C peak reflow), making it suitable for automated SMT assembly without moisture sensitivity concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 44.7 V / 49.4 V at 1 mA - defines precise avalanche onset range for reliable clamping initiation |
| VWM | 40.2 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | 64.8 V at 23.1 A - clamped voltage during 1500 W transient, limiting downstream stress |
| PPPM | 1500 W - peak pulse power handling capability with standard 10/1000 µs surge waveform |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance on recommended 8.0 mm × 8.0 mm copper pads |
| TJ Range | –65 °C to +150 °C - full operational and storage temperature envelope for harsh environments |
| Package | SMC (DO-214AB) - surface-mount outline with cathode band marking, JEDEC-compliant footprint |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side in unidirectional configuration; carries forward surge current up to 200 A (8.3 ms half-sine) |
| Cathode | Reverse-biased clamping terminal | Marked with band; referenced to system ground or protected line; conducts avalanche current during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables protection against severe transients including lightning-induced surges (IEC 61000-4-5 Level 4) |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes voltage overshoot during clamping, reducing stress on downstream ICs and MOSFETs |
| Glass-passivated junction | Ensures long-term stability of VBR and low leakage across temperature and lifetime |
| MSL Level 1 rating | Supports lead-free reflow without baking; compatible with standard SMT assembly processes |
| RoHS-compliant (E3 suffix) | Meets EU Directive 2011/65/EU and JESD201 Class 2 whisker resistance requirements |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in 12 V/24 V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and ground to shunt fast transients before they reach sensitive input stages. Use Value: Clamps 40 V transients to ≤64.8 V within nanoseconds, preserving signal integrity and preventing latch-up in automotive-grade microcontrollers. |
Use Scenario: Safeguarding digital and analog I/O channels on programmable logic controllers exposed to inductive switching noise from solenoids and relays. IC Role / Device Role / Timing Role: Standoff-rated TVS on field-side signal traces, absorbing repetitive 1500 W surges without degradation. Use Value: Maintains VWM = 40.2 V margin above 24 V nominal supply, enabling reliable operation in noisy factory environments with >100,000 surge cycles. |
| DC Power Rail Surge Suppression | Telecom Line Interface Protection |
Use Scenario: Secondary-level surge protection on 48 V telecom power supplies and PoE injectors subjected to AC-line coupled transients. IC Role / Device Role / Timing Role: Unidirectional clamping device placed after primary MOV/GDT stage to refine voltage limiting and handle residual energy. Use Value: Delivers 64.8 V clamping at 23.1 A with <1 ns response, limiting downstream voltage rise to safe levels for DC-DC converters and PMICs. |
Use Scenario: Protecting Ethernet PHY interface circuits (e.g., RJ45 magnetics secondary side) from induced surges on data lines in building-wide networks. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ < 100 pF at 0 V) placed across differential pairs to suppress common-mode transients without signal distortion. Use Value: Enables high-speed data integrity up to 100 Mbps while meeting GR-1089-CORE lightning immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ47A-E3/52T | Same VBR range (44.7–49.4 V), but SMB package (DO-214AA); lower PPPM = 600 W | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 | Select when board space is constrained and surge threat level is moderate (e.g., consumer USB ports) |
| 1.5KE47A-T | Through-hole DO-201AE package; identical VBR, VC, and PPPM; higher RθJA (~100 °C/W) | Requires wave soldering; less suitable for high-density SMT designs | Choose for legacy through-hole assemblies or where thermal mass improves surge endurance in non-SMT contexts |
Compared with SMBJ47A-E3/52T and 1.5KE47A-T, the 1.5SMC47A-E3/9AT uniquely balances 1500 W surge capacity, SMC's compact SMT footprint, and MSL Level 1 compatibility - making it optimal for automotive and industrial modules requiring high-reliability, automated production-ready protection.
Availability
1.5SMC47A-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, and DC power rail surge suppression requiring stable component supply, full traceability, and RoHS-compliant commercial-grade assurance.
Supply support for 1.5SMC47A-E3/9AT 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 optoelectronics with emphasis on reliability and application-specific performance.
The 1.5SMC Series was engineered for high-power surface-mount transient suppression in automotive, industrial, and telecom systems - delivering consistent clamping, low leakage, and robust surge endurance in the SMC package.
FAQ
What is the clamping voltage of the 1.5SMC47A-E3/9AT at its rated peak pulse current?
The 1.5SMC47A-E3/9AT has a maximum clamping voltage (VC) of 64.8 V at its rated peak pulse current (IPPM) of 23.1 A, measured using the standard 10/1000 µs waveform. This value ensures predictable voltage limiting during surge events and is validated per Vishay Document Number 88303, Table on page 2. The 1.5SMC47A-E3/9AT maintains this clamping performance across its specified operating temperature range.
Is the 1.5SMC47A-E3/9AT suitable for automotive applications?
Yes - the 1.5SMC47A-E3/9AT is RoHS-compliant (E3 suffix) and part of the AEC-Q101-qualified 1.5SMC family (with HE3/HM3 variants). While the E3/9AT variant itself is commercial-grade, its electrical specs, thermal robustness (TJ = –65 to +150 °C), and MSL Level 1 rating align with automotive subsystem requirements such as body control modules and sensor interfaces. For formal AEC-Q101 certification, the 1.5SMC47AHE3_A variant must be selected.
What does the "/9AT" suffix indicate in 1.5SMC47A-E3/9AT?
The "/9AT" suffix denotes packaging: 13-inch diameter plastic tape and reel, with 3500 units per reel. This format supports high-volume automated pick-and-place assembly. The "E3" prefix confirms RoHS compliance and commercial-grade qualification, while "A" specifies unidirectional polarity. The 1.5SMC47A-E3/9AT is not halogen-free (that requires M3 suffix) nor AEC-Q101 qualified (which requires HE3 or HM3).
How does the 1.5SMC47A-E3/9AT compare to bidirectional TVS diodes like 1.5SMC47CA?
The 1.5SMC47A-E3/9AT is unidirectional and intended for DC line protection where polarity is fixed (e.g., VCC-to-ground), offering tighter VBR tolerance and lower leakage than its bidirectional counterpart 1.5SMC47CA. The 1.5SMC47CA provides symmetrical clamping for AC or floating lines but exhibits higher leakage above 10 V VWM. Use the 1.5SMC47A-E3/9AT when protecting polarized rails with strict leakage budgets.
What PCB layout guidance applies to the 1.5SMC47A-E3/9AT for optimal thermal and surge performance?
Per Vishay's datasheet, the 1.5SMC47A-E3/9AT must be mounted on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to achieve rated PPPM and thermal resistance (RθJA = 75 °C/W). Avoid narrow traces between the device and ground/power planes; use short, wide connections to minimize inductance and ensure effective energy dissipation during transients. The 1.5SMC47A-E3/9AT benefits from thermal vias under pads if board layer count permits.
1.5SMC47A-E3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, 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):
- 23.1A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC47A-E3/9AT FAQ
1.How can I place an order for 1.5SMC47A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC47A-E3/9AT 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 1.5SMC47A-E3/9AT reliable?
The price and inventory of 1.5SMC47A-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC47A-E3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC47A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC47A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC47A-E3/9AT?
1.5SMC47A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC47A-E3/9AT 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 1.5SMC47A-E3/9AT?
For technical support, including 1.5SMC47A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC47A-E3/9AT requirements.
6.How does Aetrix verify that 1.5SMC47A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC47A-E3/9AT 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 1.5SMC47A-E3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC47A-E3/9AT?
All 1.5SMC47A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC47A-E3/9AT, 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 1.5SMC47A-E3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC47A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC47A-E3/9AT Tags
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