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Vishay General Semiconductor - Diodes Division 1.5SMC39A-M3/57T
- Part No.:
- 1.5SMC39A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC39A-M3/57T.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:6,263
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Product details
Overview
1.5SMC39A-M3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, rated for 39 V breakdown voltage (VBR = 37.1–41.0 V at 1 mA), 33.3 V stand-off voltage (VWM), and 53.9 V maximum clamping voltage (VC) at 27.8 A peak pulse current. It delivers 1500 W peak pulse power (10/1000 µs), operates from −65 °C to +150 °C, and is halogen-free, RoHS-compliant, and qualified to J-STD-020 MSL level 1.
For engineers reviewing the 1.5SMC39A-M3/57T datasheet, 1.5SMC39A-M3/57T pinout, 1.5SMC39A-M3/57T application, or 1.5SMC39A-M3/57T equivalent, this device serves as a robust overvoltage protection solution for DC power rails and signal lines in automotive, industrial, and telecom systems where fast response (<1 ns), low clamping ratio (VC/VWM ≈ 1.62), and high surge capability are required.
Technical Context
The 1.5SMC39A-M3/57T uses a glass-passivated silicon junction optimized for transient suppression with low incremental surge resistance and excellent clamping linearity under repetitive 10/1000 µs surges at 0.01% duty cycle. Its unidirectional polarity features a cathode band marking and supports forward conduction only during reverse transients.
Thermally, it exhibits RθJA = 75 °C/W (typ.) and RθJL = 15 °C/W (typ.), enabling reliable operation on standard 8.0 mm × 8.0 mm copper pads without heatsinking up to 6.5 W continuous power dissipation at 50 °C ambient. Junction temperature is rated to 150 °C max.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 37.1 V / 41.0 V at IT = 1 mA - defines precise reverse breakdown threshold for accurate clamping onset |
| VWM | 33.3 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | 53.9 V at 27.8 A - clamping voltage under 1500 W 10/1000 µs surge; ensures protected ICs see <54 V |
| PPPM | 1500 W - peak transient power handling capacity per industry-standard waveform |
| IFSM | 200 A - non-repetitive forward surge rating (8.3 ms half-sine), supporting inrush tolerance |
| TJ range | −65 °C to +150 °C - wide operating junction temperature enables under-hood and industrial deployment |
| Package | SMC (DO-214AB) - surface-mount outline with 0.320" × 0.246" footprint, compatible with automated placement |
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) | Transient current sink | Connected to protected circuit's positive rail or signal line; conducts surge current to ground during overvoltage events |
| Anode | Reference/return path | Typically tied to system ground; completes clamping path when reverse-biased beyond VWM |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Withstands high-energy lightning-induced surges common in automotive and industrial power inputs |
| Clamping voltage ≤53.9 V at 27.8 A | Provides tight overvoltage margin for 36 V nominal systems (e.g., 24 V automotive with load dump) |
| Fast response time (<1 ns) | Activates before sensitive downstream components (e.g., MCU I/O, CAN transceivers) sustain damage |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for global electronics manufacturing and end-of-life recycling |
| MSL level 1, 260 °C peak reflow | Enables single-pass lead-free reflow assembly without moisture sensitivity concerns |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Guarding |
|---|---|
Use Scenario: Protecting 12 V/24 V vehicle ECUs against ISO 7637-2 load dump and ISO 16750-2 jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and regulator input to clamp surges above 33.3 V. Use Value: Limits voltage to ≤53.9 V during 1500 W transients, preventing damage to LDOs and microcontrollers rated for 40 V absolute max. |
Use Scenario: Shielding analog outputs (e.g., 4–20 mA current loops) of pressure/temperature sensors in factory automation. IC Role / Device Role / Timing Role: TVS mounted across sensor output and ground to absorb ESD and inductive switching spikes. Use Value: Low 1 µA leakage at 33.3 V avoids loading precision current sources; fast clamping preserves signal integrity. |
| Telecom DC Power Input Protection | Consumer Device USB Port Surge Suppression |
Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras) against AC/DC adapter transients and cable-induced surges. IC Role / Device Role / Timing Role: Primary TVS on 48 V input rail upstream of DC-DC converter, configured unidirectionally. Use Value: Withstands repeated 10/1000 µs surges up to 1500 W while maintaining VC below 54 V-within safe margin for 60 V-rated converters. |
Use Scenario: Adding secondary-level surge protection on VBUS line of USB-C ports in portable monitors or docking stations. IC Role / Device Role / Timing Role: TVS placed between VBUS and GND to suppress ESD (IEC 61000-4-2 ±15 kV) and hot-swap overshoot. Use Value: 53.9 V clamping prevents latch-up in USB PD controllers; SMC package fits compact board layouts near connectors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A | Lower PPPM (600 W), smaller SMB package (DO-214AA), VWM = 36 V, VC = 58.1 V at 10.3 A | Reduced surge margin; suitable only for lower-energy environments (e.g., consumer USB, low-power IoT) | Select when board space is constrained and surge threat level is limited to IEC 61000-4-5 Level 3 (0.5 kV) |
| 1.5KE39A | Through-hole DO-201 package, same VBR/VC, but higher RθJA (≈100 °C/W), no MSL rating | Not suitable for automated SMT lines; requires wave soldering; less reliable in high-vibration automotive use | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ36A and 1.5KE39A, the 1.5SMC39A-M3/57T offers superior surge robustness (1500 W vs. 600 W or 1500 W with inferior thermal performance), SMT compatibility, and automotive-grade process control-making it optimal for production-grade 24 V systems requiring long-term reliability and AEC-Q101 traceability.
Availability
1.5SMC39A-M3/57T is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interfaces, telecom DC input stages, and consumer USB-C power delivery systems requiring stable component supply, halogen-free compliance, and MSL level 1 reflow readiness.
Supply support for 1.5SMC39A-M3/57T 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, MOSFETs, and protection devices with emphasis on high-reliability, automotive-qualified, and thermally optimized solutions.
The 1.5SMC Series was designed specifically for surface-mount transient voltage suppression in harsh environments-targeting automotive electronics, industrial controls, and telecom infrastructure where high peak power, fast response, and AEC-Q101 qualification are mandatory.
FAQ
What is the maximum clamping voltage of the 1.5SMC39A-M3/57T under a 10/1000 µs surge?
The 1.5SMC39A-M3/57T 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 guaranteed per Vishay's datasheet (Document Number 88303, Rev. 09-Mar-2026) and reflects worst-case clamping performance across temperature and production lot variation.
Is the 1.5SMC39A-M3/57T suitable for automotive applications?
Yes-the 1.5SMC39A-M3/57T is halogen-free, RoHS-compliant, and manufactured to meet J-STD-020 MSL level 1 (260 °C peak reflow). While the base M3 suffix denotes commercial grade, Vishay offers AEC-Q101-qualified variants (e.g., 1.5SMC39AHM3_A/H); the 1.5SMC39A-M3/57T itself is widely deployed in automotive subsystems where qualification is managed at the system level and thermal/mechanical robustness is verified.
What does the "M3" suffix indicate in 1.5SMC39A-M3/57T?
The "M3" suffix in 1.5SMC39A-M3/57T specifies halogen-free, RoHS-compliant construction with matte tin-plated leads meeting JESD 22-B102 whisker testing Class 2. It distinguishes the part from "E3" (RoHS-compliant but not halogen-free) and "HM3" (halogen-free + AEC-Q101 qualified). The "57T" denotes packaging: 850 units per 7-inch tape-and-reel.
How does the 1.5SMC39A-M3/57T compare to bidirectional TVS diodes like 1.5SMC39CA?
The 1.5SMC39A-M3/57T is unidirectional and features a cathode band; it conducts only during reverse overvoltage events and blocks forward current. In contrast, 1.5SMC39CA is bidirectional with symmetrical clamping in both polarities-used where AC signals or floating grounds require protection in both directions. The 1.5SMC39A-M3/57T is preferred for DC power rail protection due to lower leakage and tighter VWM specification.
What PCB pad layout is recommended for optimal thermal performance of the 1.5SMC39A-M3/57T?
Vishay specifies mounting the 1.5SMC39A-M3/57T on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to achieve rated 1500 W pulse power and 6.5 W continuous dissipation. Thermal vias under pads and internal copper planes further reduce RθJA; the datasheet confirms RθJA = 75 °C/W is measured using this layout, not on minimal FR-4.
1.5SMC39A-M3/57T 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC39A-M3/57T FAQ
1.How can I place an order for 1.5SMC39A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC39A-M3/57T 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 1.5SMC39A-M3/57T reliable?
The price and inventory of 1.5SMC39A-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC39A-M3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC39A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC39A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC39A-M3/57T?
1.5SMC39A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC39A-M3/57T 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 1.5SMC39A-M3/57T?
For technical support, including 1.5SMC39A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC39A-M3/57T requirements.
6.How does Aetrix verify that 1.5SMC39A-M3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC39A-M3/57T 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 1.5SMC39A-M3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC39A-M3/57T?
All 1.5SMC39A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC39A-M3/57T, 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 1.5SMC39A-M3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC39A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC39A-M3/57T Tags
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