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Vishay General Semiconductor - Diodes Division 1.5SMC47AHM3/H
- Part No.:
- 1.5SMC47AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC47AHM3/H.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,969
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Product details
Overview
1.5SMC47AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It features a 47 V standoff voltage (VWM), 49.4 V maximum breakdown voltage (VBR), 64.8 V 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 safeguard MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the 1.5SMC47AHM3/H datasheet, 1.5SMC47AHM3/H pinout, 1.5SMC47AHM3/H application, or 1.5SMC47AHM3/H equivalent, this device delivers verified AEC-Q101 qualification, halogen-free RoHS compliance, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for automotive-grade ESD and lightning transient suppression in production-constrained designs.
Technical Context
The 1.5SMC47AHM3/H operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve fast response time (<1 ns) and stable clamping under repetitive 10/1000 μs transients. Its thermal resistance (RθJA = 75 °C/W) and junction temperature limit (TJ = 150 °C) support operation on standard 8.0 mm × 8.0 mm copper pads without forced cooling.
Designed for DC-biased lines, it exhibits 1.0 μA max reverse leakage at 40.2 V (VWM) and a positive temperature coefficient of VBR (+0.101 %/°C), ensuring predictable voltage drift across automotive temperature ranges. The cathode-band polarity marking enables unambiguous PCB layout alignment in high-reliability power rail protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40.2 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for 48 V systems. |
| VBR (min/max) | 44.7 V / 49.4 V at 1.0 mA - Verified avalanche onset range ensures consistent turn-on across production lots and temperature. |
| VC @ IPPM | 64.8 V at 23.1 A - Clamping voltage limits downstream component stress during 1500 W surge events. |
| PPPM | 1500 W - Peak pulse power rating per 10/1000 μs waveform; supports IEC 61000-4-5 Level 4 surge immunity. |
| IFSM | 200 A - Non-repetitive forward surge current rating (8.3 ms half-sine); validates robustness against inductive switch-off spikes. |
| TJ max | 150 °C - Maximum junction temperature enables use in under-hood automotive environments without derating. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 0.320" × 0.246" footprint and matte tin-plated leads compliant with J-STD-002. |
Pinout & Package
Package: SMC (DO-214AB), molded epoxy case meeting UL 94 V-0 flammability rating; terminals are matte tin plated and solderable per J-STD-002 and JESD 22-B102. Polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to system ground or low-side return path; enables clamping when cathode voltage exceeds VBR. |
| Cathode | Current exit point during forward conduction; marked with band | Connected to protected line (e.g., 48 V rail); defines directionality and ensures correct orientation in series-connected protection schemes. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS power domains per stress test requirements. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and JEDEC J-STD-203; eliminates brominated flame retardants for safer end-of-life processing. |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 combination wave surges up to 4 kV (open-circuit)/2 kA (short-circuit) without degradation. |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes overvoltage exposure to downstream ICs - e.g., protects 60 V-rated MOSFETs in 48 V battery systems. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without baking or special handling prior to assembly. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Suppressing load-dump transients (up to 120 V, 400 ms) and jump-start spikes on 48 V boardnet power rails in electric power steering modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC-DC converter input stage to clamp overvoltage before it reaches primary regulation circuitry. Use Value: Limits peak voltage to ≤64.8 V during 23.1 A surge, preventing latch-up or gate oxide damage in 65 V-rated buck controllers. |
Use Scenario: Protecting analog front-end inputs of pressure/temperature sensors in factory automation PLC I/O modules exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Standoff protection element on 24 V sensor supply line, operating in parallel with local decoupling capacitors to absorb sub-microsecond ESD events. Use Value: Responds in <1 ns to divert >15 kV HBM ESD strikes while maintaining <1.0 μA leakage at 40.2 V - preserving sensor offset accuracy. |
| Telecom DC Power Feeding | Consumer USB-C PD Port Protection |
|
Use Scenario: Safeguarding PoE++ (IEEE 802.3bt Type 4) powered devices against cable discharge events and induced lightning surges on 57 V DC feed lines. IC Role / Device Role / Timing Role: Primary surge arrestor at PD input connector, coordinated with secondary GDT or polymer PTC for staged protection architecture. Use Value: Clamps 10/1000 μs surges to 64.8 V within 1 ns, enabling use of 60 V-rated hot-swap controllers without overdesign. |
Use Scenario: Secondary-level overvoltage protection on USB-C VBUS line after primary buck-boost controller in portable monitors and docking stations. IC Role / Device Role / Timing Role: Fast-acting clamp limiting VBUS excursions during adapter fault conditions or cable hot-plug transients. Use Value: Withstands 1500 W pulses while adding only 0.211 g mass and zero standby power - critical for thermally constrained enclosures. |
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 VWM (40.2 V), lower PPPM (600 W), SMB package (smaller footprint, higher RθJA = 85 °C/W) | Lower surge capacity suits consumer-grade 5 V–24 V rails; not AEC-Q101 qualified | Select when space-constrained layouts prioritize footprint over automotive reliability or 1500 W surge headroom. |
| 1.5KE47A | Same electrical specs but axial-leaded DO-201AD package; no halogen-free or AEC-Q101 variants available | Requires through-hole assembly; unsuitable for automated SMT lines or high-vibration environments | Choose only for legacy repair, prototyping, or non-automated production where SMT compatibility is not required. |
Compared with SMBJ47A-E3/52T and 1.5KE47A, the 1.5SMC47AHM3/H uniquely combines AEC-Q101 qualification, halogen-free compliance, 1500 W surge rating, and SMC package - making it the sole option for volume automotive SMT production requiring full regulatory alignment and robust transient immunity.
Availability
1.5SMC47AHM3/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, telecom DC feeding, and USB-C PD port hardening requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC47AHM3/H 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 high-reliability diodes, rectifiers, and protection devices for automotive, industrial, and computing markets.
The 1.5SMC Series was engineered specifically for surface-mount transient suppression in harsh-environment applications - emphasizing AEC-Q101 qualification, high-power pulse handling, and standardized SMC packaging for automated manufacturing scalability.
FAQ
What is the clamping voltage of the 1.5SMC47AHM3/H under maximum rated surge current?
The 1.5SMC47AHM3/H has a maximum clamping voltage (VC) of 64.8 V at its rated peak pulse current (IPPM) of 23.1 A, measured with a 10/1000 μs waveform. This value is guaranteed per Vishay's datasheet revision 09-Mar-2026 and defines the upper voltage limit imposed on protected circuits during worst-case surge events. The 1.5SMC47AHM3/H maintains this clamping performance across its full operating temperature range.
Is the 1.5SMC47AHM3/H qualified for automotive applications?
Yes, the 1.5SMC47AHM3/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" (halogen-free, RoHS-compliant, AEC-Q101 qualified) and documented in the 1.5SMC Series datasheet. This qualification covers stress tests including HTGB, AC/DC life test, temperature cycling, and mechanical shock - validating suitability for under-hood and chassis-mounted automotive electronics.
What does the "H" suffix mean in 1.5SMC47AHM3/H?
The "H" in 1.5SMC47AHM3/H denotes the tape-and-reel packaging option: 7-inch diameter plastic tape and reel containing 850 units. This is specified in Vishay's ordering information table and distinguishes it from the "I" variant (13-inch reel, 3500 units). The "HM3" base suffix confirms halogen-free, RoHS-compliant, and AEC-Q101-qualified construction.
How does the 1.5SMC47AHM3/H compare to bidirectional TVS diodes like 1.5SMC47CHM3/H?
The 1.5SMC47AHM3/H is unidirectional and intended for DC-biased lines with defined polarity (e.g., 48 V supply rails), whereas 1.5SMC47CHM3/H is bidirectional and suited for AC or floating signal lines. Key differences include polarity marking (cathode band on 1.5SMC47AHM3/H, no marking on bidirectional types) and reverse leakage behavior - the 1.5SMC47AHM3/H specifies 1.0 μA at 40.2 V, while bidirectional variants exhibit symmetrical leakage in both directions.
What is the thermal resistance of the 1.5SMC47AHM3/H, and how does it affect layout design?
The 1.5SMC47AHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on minimum recommended 8.0 mm × 8.0 mm copper pads per terminal. This value assumes no additional heatsinking and dictates that sustained power dissipation above ~6.5 W requires thermal derating. Layouts must maintain these pad dimensions and avoid thermal isolation to ensure reliable operation at TJ ≤ 150 °C.
1.5SMC47AHM3/H 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:
- 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):
- 23.1A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMC)
1.5SMC47AHM3/H FAQ
1.How can I place an order for 1.5SMC47AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC47AHM3/H 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 1.5SMC47AHM3/H reliable?
The price and inventory of 1.5SMC47AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC47AHM3/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC47AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC47AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC47AHM3/H?
1.5SMC47AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC47AHM3/H 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 1.5SMC47AHM3/H?
For technical support, including 1.5SMC47AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC47AHM3/H requirements.
6.How does Aetrix verify that 1.5SMC47AHM3/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC47AHM3/H 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 1.5SMC47AHM3/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC47AHM3/H?
All 1.5SMC47AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC47AHM3/H, 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 1.5SMC47AHM3/H part is unused and in its original packaging.
Return procedure for 1.5SMC47AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC47AHM3/H Tags
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