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Vishay General Semiconductor - Diodes Division 1.5SMC39AHM3_A/H
- Part No.:
- 1.5SMC39AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC39AHM3_A/H.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,439
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Product details
Overview
1.5SMC39AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMC (DO-214AB) package, rated for 39 V breakdown voltage (VBR = 37.1–41.0 V at IT = 1.0 mA), 53.9 V maximum clamping voltage (VC) at 27.8 A peak pulse current, and 1500 W peak pulse power with 10/1000 μs waveform - deployed for robust overvoltage protection of automotive-grade power rails and signal lines.
For engineers reviewing the 1.5SMC39AHM3_A/H datasheet, 1.5SMC39AHM3_A/H pinout, 1.5SMC39AHM3_A/H application, or 1.5SMC39AHM3_A/H equivalent, this part delivers AEC-Q101 qualification, halogen-free RoHS compliance, low incremental surge resistance, fast response time, and MSL Level 1 moisture sensitivity - critical for high-reliability automotive electronics design and industrial power interface protection.
Technical Context
The 1.5SMC39AHM3_A/H operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve precise reverse standoff voltage (VWM = 33.3 V) and low leakage (<1.0 μA at VWM). Its thermal resistance (RθJA = 75 °C/W) and junction temperature range (–65 to +150 °C) support sustained operation under transient stress in compact PCB layouts.
Designed for repetitive 10/1000 μs surge events at 0.01% duty cycle, it maintains stable clamping performance across ambient temperatures up to +125 °C (derated per Fig. 2), with cathode-band polarity marking and matte tin-plated leads compliant to J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 37.1 V / 41.0 V at IT = 1.0 mA - defines precise avalanche onset threshold for reliable overvoltage triggering |
| VWM | 33.3 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 53.9 V at 27.8 A - clamping voltage limiting downstream circuit stress during 10/1000 μs transients |
| PPPM | 1500 W - peak pulse power handling capability under standardized surge waveform |
| TJ max. | +150 °C - enables use in under-hood automotive environments and high-temperature industrial enclosures |
| AEC-Q101 | Qualified - validated for automotive reliability including temperature cycling, HTRB, and ESD testing |
| Package | SMC (DO-214AB) - industry-standard 2-pin surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal requirement |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads; cathode indicated by band on body; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential rail; conducts during forward surge (e.g., reverse-battery protection) |
| Cathode | Avalanche clamping terminal | Connected to protected line; initiates clamping when reverse voltage exceeds VWM; marked by band |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units, ADAS sensors, and infotainment power supplies |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for global automotive OEMs and industrial safety certifications |
| 1500 W peak pulse power | Withstands ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 surge events without degradation |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes voltage overshoot during transients, reducing stress on downstream MOSFETs and ICs |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without pre-baking or special handling |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamping |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump (ISO 16750-2) and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp surges above 33.3 V. Use Value: Limits peak voltage to ≤53.9 V during 1500 W transients, preventing damage to LDOs and microcontrollers. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation systems. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to shunt ESD and switching noise on 0–5 V signal lines. Use Value: Sub-1 ns response time and <1.0 μA leakage preserve signal integrity while meeting IEC 61000-4-2 Level 4. |
| Telecom DC Power Interface | Consumer Device USB Port Protection |
Use Scenario: Securing 48 V PoE-powered equipment inputs against lightning-induced surges on outdoor Ethernet links. IC Role / Device Role / Timing Role: Primary clamping device on DC input rail upstream of DC/DC converter. Use Value: 1500 W rating handles multi-kV induced transients; AEC-Q101 grade ensures long-term field reliability. |
Use Scenario: Adding secondary overvoltage protection on VBUS line of USB-C ports in portable medical devices. IC Role / Device Role / Timing Role: Unidirectional suppressor between VBUS and chassis ground to absorb hot-plug spikes. Use Value: 33.3 V VWM avoids interference with 5 V ±5% USB spec; 53.9 V VC prevents USB PHY latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ39A-E3/57T | Same VBR range (37.1–41.0 V) but lower PPPM = 400 W; SMA package (smaller footprint, higher RθJA) | Limited to lower-energy transients (e.g., ESD-only); unsuitable for load dump or lightning surges | Select only when board space is constrained and surge energy is below 400 W capability |
| 1.5KE39A | Through-hole DO-201 package; identical electrical specs but no AEC-Q101 qualification or halogen-free status | Not approved for automotive production; requires manual insertion or wave soldering | Use only for prototyping or non-automotive industrial applications where surface-mount is not required |
Compared with SMAJ39A-E3/57T and 1.5KE39A, the 1.5SMC39AHM3_A/H uniquely combines 1500 W surge capacity, AEC-Q101 qualification, halogen-free construction, and SMC package thermal performance - making it the only option qualified for volume automotive production with full compliance traceability.
Availability
1.5SMC39AHM3_A/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, telecom power supplies, and consumer USB-C protection requiring stable component supply and full AEC-Q101 documentation.
Supply support for 1.5SMC39AHM3_A/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 validation.
The 1.5SMC Series was developed to deliver high-power, surface-mount TVS solutions for automotive and industrial systems demanding AEC-Q101 qualification, low clamping voltage, and robust surge immunity - directly addressing ISO 7637 and IEC 61000-4-5 compliance needs.
FAQ
What is the clamping voltage of the 1.5SMC39AHM3_A/H under a 10/1000 μs surge?
The 1.5SMC39AHM3_A/H has a maximum clamping voltage (VC) of 53.9 V at 27.8 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is measured per Figure 1 in the Vishay datasheet 88303 and defines the upper voltage limit imposed on protected circuits during surge events. The 1.5SMC39AHM3_A/H maintains this clamping performance across its specified junction temperature range.
Is the 1.5SMC39AHM3_A/H suitable for automotive applications?
Yes, the 1.5SMC39AHM3_A/H is AEC-Q101 qualified and explicitly designated for automotive use with ordering code suffix "HM3" indicating halogen-free, RoHS-compliant, and AEC-Q101-qualified construction. It meets requirements for under-hood and cabin electronics, including engine control modules and ADAS sensor interfaces, as confirmed in Vishay's 1.5SMC Series datasheet revision 09-Mar-2026.
What does the "_A/H" suffix mean in 1.5SMC39AHM3_A/H?
The "_A/H" suffix in 1.5SMC39AHM3_A/H indicates two attributes: "A" denotes AEC-Q101 qualification for the 6.8 V to 220 V voltage range, and "H" specifies packaging in 7-inch diameter plastic tape and reel with 850 units per reel. This matches Vishay's Ordering Information table (page 3, document 88303), where "H" corresponds to the delivery mode code for 7″ reels.
What is the maximum reverse leakage current for the 1.5SMC39AHM3_A/H at its standoff voltage?
The 1.5SMC39AHM3_A/H exhibits a maximum reverse leakage current (ID) of 1.0 μA at its rated standoff voltage (VWM = 33.3 V), measured at TA = 25 °C. This low leakage preserves power efficiency in always-on automotive modules and ensures minimal impact on high-impedance sensor bias networks.
Does the 1.5SMC39AHM3_A/H have a defined thermal resistance specification?
Yes, the 1.5SMC39AHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the minimum recommended 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal. This value is critical for estimating junction temperature rise under continuous power dissipation and is specified in the Thermal Characteristics table (page 3, document 88303).
1.5SMC39AHM3_A/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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 27.8A
- 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)
1.5SMC39AHM3_A/H FAQ
1.How can I place an order for 1.5SMC39AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC39AHM3_A/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 1.5SMC39AHM3_A/H reliable?
The price and inventory of 1.5SMC39AHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC39AHM3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC39AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC39AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC39AHM3_A/H?
1.5SMC39AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC39AHM3_A/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 1.5SMC39AHM3_A/H?
For technical support, including 1.5SMC39AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC39AHM3_A/H requirements.
6.How does Aetrix verify that 1.5SMC39AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC39AHM3_A/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 1.5SMC39AHM3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC39AHM3_A/H?
All 1.5SMC39AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC39AHM3_A/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 1.5SMC39AHM3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC39AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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