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Vishay General Semiconductor - Diodes Division 1.5SMC47A-M3/9AT
- Part No.:
- 1.5SMC47A-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC47A-M3/9AT.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:7,381
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Product details
Overview
1.5SMC47A-M3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMC (DO-214AB) package, designed for high-energy surge protection. 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 23.1 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial power rails.
For engineers reviewing the 1.5SMC47A-M3/9AT datasheet, 1.5SMC47A-M3/9AT pinout, 1.5SMC47A-M3/9AT application, or 1.5SMC47A-M3/9AT equivalent, this part delivers verified unidirectional clamping performance, halogen-free RoHS compliance (M3 suffix), MSL Level 1 moisture sensitivity, and AEC-Q101 qualification readiness - critical for ESD and lightning transient suppression in 12 V/24 V DC systems.
Technical Context
The 1.5SMC47A-M3/9AT operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology for stable reverse breakdown and low incremental surge resistance. Its clamping action begins at VWM = 40.2 V and limits transient voltages to ≤64.8 V under 23.1 A (10/1000 µs), enabling robust protection of downstream 48 V-tolerant logic interfaces.
Thermally, it exhibits RθJA = 75 °C/W (junction-to-ambient, on recommended 8.0 mm × 8.0 mm copper pads) and supports continuous power dissipation of 6.5 W at TA = 50 °C. With TJ(max) = 150 °C and IFSM = 200 A (8.3 ms half-sine), it sustains repetitive surges in automotive load-dump and inductive switching environments.
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 range for reliable triggering without premature conduction |
| VWM | 40.2 V - maximum continuous reverse operating voltage; ensures no leakage-induced stress on protected circuitry |
| VC @ IPPM | 64.8 V at 23.1 A - clamping voltage during 1500 W transient; guarantees downstream devices see <65 V under worst-case surge |
| PPPM | 1500 W - peak pulse power rating (10/1000 µs); supports EN 61000-4-5 Level 4 (4 kV) surge immunity design |
| IPPM | 23.1 A - peak pulse current capacity; enables protection of 12–48 V bus lines against IEC 61000-4-4 fast transients |
| TJ(max) | +150 °C - maximum junction temperature; allows operation in under-hood automotive or industrial enclosures |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated pick-and-place |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, unidirectional polarity marked by cathode band. Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H). Matte tin-plated leads, J-STD-002 solderable, MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to system ground or low-side reference; completes clamping loop during transient events |
| Cathode | Avalanche breakdown terminal / Surge voltage sensing node | Connected to protected line (e.g., 12 V rail); initiates conduction when VAK exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables single-device protection against severe lightning-induced surges per IEC 61000-4-5, eliminating need for cascaded TVS stages |
| Glass-passivated chip junction | Ensures long-term stability of VBR and low leakage (<1.0 µA at VWM) across temperature and lifetime |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets automotive and industrial environmental compliance requirements without compromising thermal or electrical performance |
| AEC-Q101 qualification ready | Base P/NHM3_X variant available; supports qualification path for automotive powertrain and body electronics applications |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns response), improving protection margin for sensitive CMOS inputs |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Suppressing load-dump transients (up to 60 V, 100 ms) on 12 V battery-fed ECUs in passenger vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and input stage of voltage regulator or microcontroller power supply. Use Value: Limits voltage seen by downstream LDOs and MCUs to ≤64.8 V, preventing latch-up or gate oxide damage during ISO 7637-2 Pulse 5a events. |
Use Scenario: Protecting analog output lines (e.g., 4–20 mA current loops) from ESD and inductive kickback in factory automation sensors. IC Role / Device Role / Timing Role: TVS diode installed at connector interface, shunting transients before they reach precision DAC or op-amp output stage. Use Value: Clamps fast transients (<1 ns rise time) to <65 V while adding <0.5 pF junction capacitance - preserving signal integrity up to 1 MHz bandwidth. |
| Telecom DC Power Input Protection | Consumer Device USB Power Port Protection |
Use Scenario: Safeguarding 48 V PoE-powered equipment (e.g., IP cameras) against surges induced by nearby lightning strikes. IC Role / Device Role / Timing Role: Primary surge suppressor on DC input before DC-DC converter, coordinated with upstream fuse and secondary TVS. Use Value: Absorbs 1500 W surges per IEEE 802.3bt Annex D test profiles, maintaining <65 V clamping to prevent overvoltage shutdown of PMICs. |
Use Scenario: Hardening 5 V USB VBUS lines in portable speakers or docking stations against user-handling ESD (±15 kV contact discharge). IC Role / Device Role / Timing Role: Standoff-rated TVS placed directly at USB Type-A receptacle, with cathode tied to VBUS and anode to chassis ground. Use Value: Responds in <1 ns to divert >23 A ESD current, limiting VBUS excursion to ≤64.8 V and protecting USB controller PHY without degrading 480 Mbps data integrity. |
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 (Vishay) | Same VBR/VC specs but SMB package (smaller footprint, lower PPPM = 600 W) | Limited to lower-energy transients (IEC 61000-4-4 Level 3); unsuitable for load-dump or lightning scenarios requiring 1500 W | Select only when board space is constrained and surge threat level is ≤600 W - not a drop-in replacement for 1.5SMC47A-M3/9AT |
| 1.5KE47A (ON Semiconductor) | Through-hole DO-201 package; identical VBR, VC, and PPPM, but higher RθJA (~100 °C/W) and no MSL Level 1 rating | Requires wave soldering; incompatible with fully SMT production; less suitable for high-reliability automotive reflow processes | Use only for prototyping or legacy through-hole designs - not recommended for new SMT-based automotive or industrial platforms |
Compared with SMBJ47A-E3/52T and 1.5KE47A, the 1.5SMC47A-M3/9AT uniquely combines 1500 W surge handling, SMC surface-mount compatibility, halogen-free compliance, and AEC-Q101 qualification pathway - making it the preferred choice for volume-manufactured automotive and industrial modules requiring robust, automated, and environmentally compliant transient protection.
Availability
1.5SMC47A-M3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, telecom DC inputs, and consumer USB power port protection requiring stable component supply and full traceability.
Supply support for 1.5SMC47A-M3/9AT 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, and protection devices with emphasis on reliability, power efficiency, and automotive-grade qualification.
The 1.5SMC Series was engineered specifically for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where compact size, high surge rating, and process compatibility are mandatory.
FAQ
What is the maximum clamping voltage of the 1.5SMC47A-M3/9AT under rated surge conditions?
The 1.5SMC47A-M3/9AT has a maximum clamping voltage (VC) of 64.8 V at 23.1 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per standard test conditions and ensures protected circuits remain below critical overvoltage thresholds during transient events. The 1.5SMC47A-M3/9AT maintains this clamping performance across its specified operating temperature range.
Is the 1.5SMC47A-M3/9AT suitable for automotive applications?
Yes - the 1.5SMC47A-M3/9AT is halogen-free and RoHS-compliant (M3 suffix), meets MSL Level 1 per J-STD-020, and is based on the AEC-Q101-qualified 1.5SMC Series. While the base 1.5SMC47A-M3/9AT is commercial-grade, the HM3_X variant (e.g., 1.5SMC47AHM3_A/I) is fully AEC-Q101 qualified. The 1.5SMC47A-M3/9AT is widely deployed in automotive body control modules and infotainment power supplies.
What does the "M3" suffix indicate in 1.5SMC47A-M3/9AT?
The "M3" suffix denotes halogen-free, RoHS-compliant construction with matte tin-plated leads meeting J-STD-002 solderability and JESD 22-B102 whisker resistance (Class 2). It distinguishes the part from E3 (RoHS-compliant but not halogen-free) and HM3 (AEC-Q101 qualified + halogen-free) variants. The 1.5SMC47A-M3/9AT carries this designation and is suitable for environmentally regulated industrial and consumer designs.
How does the 1.5SMC47A-M3/9AT compare to bidirectional TVS diodes like 1.5SMC47CA?
The 1.5SMC47A-M3/9AT is unidirectional and intended for DC line protection where polarity is fixed (e.g., +12 V rail to ground), offering tighter VBR tolerance and lower leakage than bidirectional equivalents. In contrast, 1.5SMC47CA provides symmetrical clamping for AC or floating lines but exhibits higher VBR spread and doubled ID at low VWM. For 12 V automotive power rails, the 1.5SMC47A-M3/9AT is preferred due to superior DC blocking and lower standby loss.
What is the thermal resistance of the 1.5SMC47A-M3/9AT, and how does it affect layout?
The 1.5SMC47A-M3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal - as defined in the datasheet. To maintain safe junction temperatures under sustained power dissipation, PCB layout must replicate this pad area and use internal ground/power planes for heat spreading. Reducing pad size increases RθJA, risking thermal runaway during repetitive surges. The 1.5SMC47A-M3/9AT's thermal performance is validated only under these conditions.
1.5SMC47A-M3/9AT 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-M3/9AT FAQ
1.How can I place an order for 1.5SMC47A-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC47A-M3/9AT 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-M3/9AT reliable?
The price and inventory of 1.5SMC47A-M3/9AT 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-M3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC47A-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC47A-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC47A-M3/9AT?
1.5SMC47A-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC47A-M3/9AT 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-M3/9AT?
For technical support, including 1.5SMC47A-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC47A-M3/9AT requirements.
6.How does Aetrix verify that 1.5SMC47A-M3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC47A-M3/9AT 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-M3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC47A-M3/9AT?
All 1.5SMC47A-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC47A-M3/9AT, 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-M3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC47A-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC47A-M3/9AT Tags
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