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Vishay General Semiconductor - Diodes Division 1.5SMC43AHM3/H
- Part No.:
- 1.5SMC43AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC43AHM3/H.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,045
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Product details
Overview
1.5SMC43AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 1500 W peak pulse power (10/1000 μs), 43 V breakdown voltage (VBR = 40.9–45.2 V at 1 mA), and clamping voltage of 59.3 V at 25.3 A. It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial power electronics.
For engineers reviewing the 1.5SMC43AHM3/H datasheet, 1.5SMC43AHM3/H pinout, 1.5SMC43AHM3/H application, or 1.5SMC43AHM3/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, thermal resistance (RθJA = 75 °C/W), and junction temperature range (–65 to +150 °C).
Technical Context
This TVS diode operates as a clamping device triggered by transient overvoltage events, leveraging a glass-passivated silicon junction for fast response (<1 ns) and low incremental surge resistance. Its unidirectional configuration provides forward conduction capability up to 200 A (8.3 ms half-sine) and reverse standoff voltage (VWM) of 36.8 V.
Designed for surface-mount assembly on 8.0 mm × 8.0 mm copper pads, it meets MSL Level 1 per J-STD-020 (peak reflow 260 °C) and supports automated placement. The HM3 suffix confirms halogen-free, RoHS-compliant, and AEC-Q101-qualified construction for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 40.9 V / 45.2 V at 1 mA - defines precise voltage threshold for avalanche conduction onset |
| VWM | 36.8 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA |
| VC @ IPPM | 59.3 V at 25.3 A - clamped voltage during 1500 W surge, limiting stress on downstream components |
| PPPM | 1500 W (10/1000 μs waveform) - peak transient energy absorption capacity under standardized surge test |
| IFSM | 200 A (8.3 ms half-sine) - forward surge current rating, enabling robust protection against inductive kickback |
| TJ Range | –65 °C to +150 °C - operational and storage junction temperature range supporting under-hood automotive use |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, guiding PCB copper pad sizing for thermal management |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to circuit ground or low-side return path; defines polarity-sensitive clamping direction |
| Cathode | Avalanche conduction terminal / Surge current sink | Banded end; connects to protected line (e.g., power rail or signal trace) to shunt transients to ground |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables protection against severe lightning-induced surges and inductive switching spikes in 12 V/24 V systems |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for global automotive and industrial OEM supply chains |
| Glass passivated chip junction | Ensures stable breakdown characteristics and long-term reliability under thermal cycling and humidity stress |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow processes without preconditioning or special handling |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp surges above 36.8 V. Use Value: Limits peak voltage to 59.3 V during 1500 W transients, preventing damage to downstream DC/DC converters and microcontrollers. |
Use Scenario: Safeguarding analog outputs of pressure or temperature sensors connected to PLC I/O modules. IC Role / Device Role / Timing Role: TVS mounted directly at connector interface to suppress ESD (IEC 61000-4-2) and cable discharge events. Use Value: Sub-1 ns response time and 59.3 V clamping prevent latch-up or gate oxide rupture in precision op-amps and ADC front-ends. |
| Telecom DC Power Input Protection | Consumer Device USB Power Port Protection |
Use Scenario: Securing 48 V DC inputs of PoE-powered network switches against induced surges from nearby AC wiring. IC Role / Device Role / Timing Role: Unidirectional TVS on primary side of DC/DC stage, referenced to system ground. Use Value: Withstands repetitive 10/1000 μs surges at 0.01 % duty cycle, maintaining integrity across extended field deployment. |
Use Scenario: Hardening 5 V USB VBUS lines in smart home hubs against hot-plug transients and ESD. IC Role / Device Role / Timing Role: TVS placed between VBUS and GND, leveraging low capacitance to avoid signal integrity degradation. Use Value: 36.8 V standoff ensures normal operation during 5 V regulation; 59.3 V clamping prevents overvoltage damage to USB controller ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A-E3/52 | Same VBR range (40.9–45.2 V), lower PPPM (600 W), SMB package (smaller footprint, higher RθJA = 85 °C/W) | Suitable for space-constrained consumer electronics where 1500 W surge margin is not required | Select when board area is limited and surge threat level is moderate (e.g., IEC 61000-4-5 Level 3) |
| 1.5KE43A | Through-hole DO-201 package, identical electrical specs but incompatible mounting and thermal profile (RθJA ≈ 60 °C/W on FR4) | Used in legacy industrial controls or prototyping where manual assembly or socketing is preferred | Choose only if SMT is unavailable; requires PCB redesign and lacks AEC-Q101 qualification |
Compared with 1.5SMC43AHM3/H, SMBJ43A-E3/52 offers reduced surge capacity and thermal performance in a smaller package, while 1.5KE43A provides identical clamping behavior but mandates through-hole layout and lacks automotive qualification-making 1.5SMC43AHM3/H the optimal choice for production automotive and high-reliability SMT designs.
Availability
1.5SMC43AHM3/H is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, telecom DC input safeguarding, and consumer USB port surge suppression requiring stable component supply and full AEC-Q101 traceability.
Supply support for 1.5SMC43AHM3/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 diodes, rectifiers, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was engineered for high-power, surface-mount transient suppression in harsh environments-targeting automotive, industrial, and telecom systems demanding AEC-Q101 validation and robust 1500 W surge handling.
FAQ
What is the clamping voltage of the 1.5SMC43AHM3/H under maximum surge conditions?
The 1.5SMC43AHM3/H exhibits a maximum clamping voltage (VC) of 59.3 V when subjected to its rated peak pulse current of 25.3 A (10/1000 μs waveform). This value is measured per standard test conditions and ensures downstream components experience no more than 59.3 V during transient events, directly supporting design margin calculations for 36 V-rated circuits.
Is the 1.5SMC43AHM3/H qualified for automotive applications?
Yes, the 1.5SMC43AHM3/H is AEC-Q101 qualified, as confirmed by the "HM3" suffix indicating halogen-free, RoHS-compliant, and automotive-grade construction. It is specifically intended for use in engine control units, body electronics, and ADAS sensor interfaces where reliability under thermal cycling, vibration, and high-energy transients is mandatory.
What does the "HM3" suffix mean in 1.5SMC43AHM3/H?
The "HM3" suffix in 1.5SMC43AHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. The "H" indicates packaging in 7-inch tape-and-reel (850 units/reel), while "M3" specifies the environmental and reliability grade-distinct from commercial "E3" or non-halogen-free "M3" variants without automotive validation.
How does the 1.5SMC43AHM3/H differ from bidirectional TVS diodes like 1.5SMC43CHM3/H?
The 1.5SMC43AHM3/H is unidirectional and features a cathode band for polarity-sensitive placement, enabling forward conduction and higher IFSM (200 A). In contrast, 1.5SMC43CHM3/H is bidirectional with no polarity marking and symmetric clamping in both directions-making the 1.5SMC43AHM3/H appropriate for DC power rails and the "C" variant better suited for AC signal lines or data buses.
What PCB layout guidance applies to the 1.5SMC43AHM3/H for optimal thermal performance?
For optimal thermal performance, the 1.5SMC43AHM3/H should be mounted on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, per Vishay's datasheet recommendation. This pad size achieves the specified RθJA of 75 °C/W; reducing pad area increases junction temperature and de-rates surge capability, especially under repetitive pulse conditions.
1.5SMC43AHM3/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):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 25.3A
- 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)
1.5SMC43AHM3/H FAQ
1.How can I place an order for 1.5SMC43AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC43AHM3/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 1.5SMC43AHM3/H reliable?
The price and inventory of 1.5SMC43AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC43AHM3/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC43AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC43AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC43AHM3/H?
1.5SMC43AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC43AHM3/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 1.5SMC43AHM3/H?
For technical support, including 1.5SMC43AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC43AHM3/H requirements.
6.How does Aetrix verify that 1.5SMC43AHM3/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC43AHM3/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 1.5SMC43AHM3/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC43AHM3/H?
All 1.5SMC43AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC43AHM3/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 1.5SMC43AHM3/H part is unused and in its original packaging.
Return procedure for 1.5SMC43AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC43AHM3/H Tags
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