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Vishay General Semiconductor - Diodes Division 1.5SMC47AHM3_A/I
- Part No.:
- 1.5SMC47AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC47AHM3_A/I.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,047
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Product details
Overview
1.5SMC47AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power rails and signal lines. It features a 47 V standoff voltage (VWM), 64.8 V maximum clamping voltage (VC) at 23.1 A peak pulse current (IPPM), and 1500 W peak pulse power capability with a 10/1000 μs waveform - deployed in automotive ECUs, industrial motor drives, and telecom interface circuits.
For engineers reviewing the 1.5SMC47AHM3_A/I datasheet, 1.5SMC47AHM3_A/I pinout, 1.5SMC47AHM3_A/I application, or 1.5SMC47AHM3_A/I equivalent, key selection criteria include its AEC-Q101 qualification, halogen-free RoHS-compliant HM3 packaging, low incremental surge resistance, and verified clamping performance under repetitive transients per IEC 61000-4-5.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging a glass-passivated silicon junction for fast response (<1 ns) and stable breakdown behavior. Its thermal design supports operation up to 150 °C junction temperature, with RθJA = 75 °C/W and RθJL = 15 °C/W enabling effective heat dissipation on standard 8 mm × 8 mm copper pads.
The 1.5SMC47AHM3_A/I delivers precise transient suppression with a 44.7–49.4 V breakdown voltage (VBR) at 1 mA test current, 40.2 V stand-off voltage (VWM), and <1 μA reverse leakage at VWM - ensuring minimal standby power loss while maintaining high immunity to ESD and lightning-induced surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 40.2 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC rail margin. |
| VBR (Breakdown) | 44.7–49.4 V at 1 mA - Verified avalanche onset range; ensures predictable turn-on during transients. |
| VC (Clamping) | 64.8 V at 23.1 A IPPM - Peak voltage seen by protected circuit during 10/1000 μs surge; determines downstream component stress. |
| PPPM | 1500 W - Sustained surge energy handling per IEC 61000-4-5; enables single-device protection for Class 3/4 interfaces. |
| IFSM | 200 A - Non-repetitive forward surge rating (8.3 ms half-sine); supports inrush current tolerance in power supply inputs. |
| TJ max | +150 °C - Maximum junction temperature; allows deployment in under-hood automotive and high-ambient industrial environments. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 0.320" x 0.246" footprint; compatible with automated pick-and-place and reflow. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-side connection in unidirectional configuration | Connects to protected line; clamps positive transients to ground when referenced to anode. |
| Anode | Reference/ground node | Typically tied to system ground or low-impedance return path; establishes clamping reference potential. |
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) | Meets JESD201 Class 2 whisker resistance and global environmental compliance mandates without performance trade-offs. |
| 1500 W peak pulse power (10/1000 μs) | Single-device protection against severe lightning surges (IEC 61000-4-5 Level 4) on 12 V/24 V systems. |
| Low clamping ratio (VC/VBR ≈ 1.33) | Minimizes overvoltage stress on downstream ICs such as CAN transceivers, microcontrollers, and analog front-ends. |
| Fast response time (<1 ns) | Engages before transient energy couples into sensitive circuitry; critical for protecting high-speed data lines. |
Applications
| Automotive Power Rail Protection | Industrial Motor Drive Control |
|---|---|
|
Use Scenario: Protecting 12 V battery-supplied MCU power inputs in engine control modules exposed to load dump (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Unidirectional TVS clamping positive transients to ground; acts as first-line defense upstream of LDOs and DC-DC converters. Use Value: Limits peak voltage to 64.8 V during 1500 W surges, preventing latch-up or permanent damage to 5 V/3.3 V logic supplies. |
Use Scenario: Safeguarding gate driver inputs in 3-phase inverter boards subjected to switching-induced dv/dt noise and cross-talk. IC Role / Device Role / Timing Role: Clamps fast-rising voltage spikes on isolated gate drive signal paths (e.g., optocoupler outputs or level shifters). Use Value: Sub-1 ns response prevents false triggering of IGBT/MOSFET gates, preserving timing integrity and preventing shoot-through. |
| Telecom Interface Surge Protection | Consumer Sensor Signal Line Guarding |
|
Use Scenario: Shielding RS-485 transceiver pins in outdoor base station equipment against induced lightning surges (IEC 61000-4-5). IC Role / Device Role / Timing Role: Bidirectional-capable variant not applicable; this unidirectional part used with series impedance + parallel grounding for asymmetric line protection. Use Value: Maintains signal integrity below 64.8 V clamp while supporting >10 kV surge immunity with coordinated PCB layout. |
Use Scenario: Securing I²C/SPI lines connecting MEMS sensors (e.g., accelerometers, pressure transducers) to host processors in white goods. IC Role / Device Role / Timing Role: Low-leakage (≤1 μA at 40.2 V) TVS placed directly at connector entry point to shunt ESD events before trace coupling. Use Value: Prevents sensor offset drift or communication lockup caused by ±8 kV contact ESD (IEC 61000-4-2) without loading active bus signals. |
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-E3/57T | Same 47 V VWM, but SMA package (smaller footprint, lower PPPM = 400 W), non-AEC-Q101, no halogen-free designation. | Limited to consumer-grade, low-energy surge environments; unsuitable for automotive or industrial duty cycles. | Select only for space-constrained, cost-sensitive designs where 1500 W surge immunity is not required. |
| 1.5KE47A | Through-hole DO-201 package, identical electrical specs (VWM = 40.2 V, VC = 64.8 V), but lacks AEC-Q101, MSL Level 1, and halogen-free compliance. | Requires manual or wave soldering; incompatible with high-volume SMT assembly and automotive qualification requirements. | Use only for prototyping or legacy through-hole systems where rework flexibility outweighs production scalability. |
Compared with SMAJ47A-E3/57T and 1.5KE47A, the 1.5SMC47AHM3_A/I uniquely combines AEC-Q101 qualification, halogen-free RoHS compliance, SMC surface-mount compatibility, and full 1500 W surge rating - making it the sole choice for volume automotive and industrial SMT production requiring long-term supply stability and regulatory alignment.
Availability
1.5SMC47AHM3_A/I is available at Aetrix Electronics and suitable for automotive ECU designs, industrial motor controller protection, and telecom infrastructure surge hardening requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC47AHM3_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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The 1.5SMC Series was engineered specifically for surface-mount transient suppression in harsh environments - emphasizing AEC-Q101 reliability, high-power surge handling, and seamless integration into automated manufacturing flows.
FAQ
What is the clamping voltage of the 1.5SMC47AHM3_A/I under a 10/1000 μs surge?
The 1.5SMC47AHM3_A/I exhibits a maximum clamping voltage (VC) of 64.8 V when subjected to its rated 23.1 A peak pulse current (IPPM) using a 10/1000 μs waveform. This value is measured per standard test conditions (TA = 25 °C, mounted on 8 mm × 8 mm copper pads) and defines the upper voltage limit imposed on protected circuitry during surge events. The 1.5SMC47AHM3_A/I maintains this clamping performance consistently across its operational temperature range.
Is the 1.5SMC47AHM3_A/I qualified for automotive applications?
Yes, the 1.5SMC47AHM3_A/I carries AEC-Q101 qualification, confirmed by Vishay's documentation for the HM3 suffix variants. It is explicitly rated for use in automotive subsystems including engine control units, body control modules, and ADAS sensor interfaces. The 1.5SMC47AHM3_A/I meets stringent requirements for temperature cycling, humidity resistance, and mechanical shock - validated per the AEC-Q101 stress test standard.
What does the "HM3" suffix indicate in 1.5SMC47AHM3_A/I?
The "HM3" suffix in 1.5SMC47AHM3_A/I denotes halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance - distinct from the "E3" (RoHS only) and "HE3" (AEC-Q101 + RoHS) variants. The "_A/I" further specifies the revision code "A" and tape-and-reel packaging in 13-inch reels (3500 units per reel). This full suffix confirms both environmental compliance and production-ready packaging for high-volume SMT lines.
How does the 1.5SMC47AHM3_A/I compare to bidirectional TVS diodes?
The 1.5SMC47AHM3_A/I is strictly unidirectional, meaning it clamps only positive-going transients relative to its cathode-anode orientation - ideal for DC power rail protection. Unlike bidirectional variants (e.g., 1.5SMC47CHM3_A/I), it cannot suppress symmetrical AC transients without external biasing. Its unidirectional architecture yields lower leakage (<1 μA at VWM) and tighter VBR tolerance, making the 1.5SMC47AHM3_A/I preferred for precision DC protection where polarity is fixed.
What is the thermal resistance of the 1.5SMC47AHM3_A/I, and how does it affect layout?
The 1.5SMC47AHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead resistance (RθJL) of 15 °C/W, measured on standard 0.31" × 0.31" (8 mm × 8 mm) copper pads per terminal. To maintain safe operation at full 1500 W surge ratings, PCB layout must provide adequate copper area and thermal vias - undersized pads will elevate junction temperature beyond the 150 °C maximum, risking parametric shift or failure. The 1.5SMC47AHM3_A/I's thermal profile is optimized for standard SMC land patterns defined in JEDEC DO-214AB.
1.5SMC47AHM3_A/I 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:
- 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_A/I FAQ
1.How can I place an order for 1.5SMC47AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC47AHM3_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 1.5SMC47AHM3_A/I reliable?
The price and inventory of 1.5SMC47AHM3_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 1.5SMC47AHM3_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC47AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC47AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC47AHM3_A/I?
1.5SMC47AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC47AHM3_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 1.5SMC47AHM3_A/I?
For technical support, including 1.5SMC47AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC47AHM3_A/I requirements.
6.How does Aetrix verify that 1.5SMC47AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC47AHM3_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 1.5SMC47AHM3_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC47AHM3_A/I?
All 1.5SMC47AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC47AHM3_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 1.5SMC47AHM3_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC47AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC47AHM3_A/I Tags
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