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Vishay General Semiconductor - Diodes Division SM15T39A-M3/9AT
- Part No.:
- SM15T39A-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T39A-M3/9AT.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,716
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Product details
Overview
SM15T39A-M3/9AT from Vishay General Semiconductor is a unidirectional 1500 W Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, with 33.3 V stand-off voltage (VWM), 37.1–41.0 V breakdown voltage (VBR at 1 mA), and 53.9 V maximum clamping voltage (VC) at 28.0 A peak pulse current (IPPM). It protects MOSFETs, ICs, and sensor signal lines against lightning-induced and inductive-switching transients in automotive and industrial power electronics.
For engineers reviewing the SM15T39A-M3/9AT datasheet, SM15T39A-M3/9AT pinout, SM15T39A-M3/9AT application, or SM15T39A-M3/9AT equivalent, key selection criteria include clamping performance under 10/1000 μs surge, unidirectional polarity with cathode band marking, halogen-free RoHS compliance (M3 suffix), and AEC-Q101 qualification readiness via HM3 variant.
Technical Context
The SM15T39A-M3/9AT employs a glass-passivated silicon junction optimized for low-inductance transient suppression. Its 1500 W peak pulse power rating is defined per 10/1000 μs waveform, with thermal resistance RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to TJ = 150 °C.
It delivers 53.9 V clamping at 28.0 A IPPM, with reverse leakage ≤1.0 μA at 33.3 V VWM. The device is mounted on 8.0 mm × 8.0 mm copper pads per terminal and meets MSL Level 1 (260 °C peak reflow).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33.3 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 37.1 V / 41.0 V at 1.0 mA - Confirmed breakdown threshold ensuring predictable turn-on during overvoltage events |
| VC @ IPPM | 53.9 V at 28.0 A (10/1000 μs) - Clamping voltage limiting downstream component stress during surge |
| PPPM | 1500 W - Peak pulse power handling capability for lightning and inductive switching threats |
| TJ max. | +150 °C - Maximum junction temperature supporting operation in under-hood automotive and industrial environments |
| Package | SMC (DO-214AB) - Surface-mount outline with 0.320" length, compatible with automated placement and J-STD-020 reflow |
| Compliance | Halogen-free, RoHS-compliant (M3 suffix), MSL Level 1 - Ensures manufacturability and environmental compliance |
Pinout & Package
SM15T39A-M3/9AT uses the SMC (DO-214AB) package: a surface-mount, molded plastic case with matte tin-plated leads solderable per J-STD-002. Polarity is unidirectional; the cathode is marked by a band on the body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to system ground or low-side reference | Enables conduction path during reverse transient when cathode is held at higher potential |
| Cathode | Marked terminal (band); connected to protected line or supply rail | Defines clamping direction: voltage on cathode above anode triggers avalanche breakdown |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Supports robust protection against IEC 61000-4-5 Level 4 (4 kV) surges without derating in standard PCB layouts |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage stress on downstream ICs while maintaining fast response time |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| MSL Level 1, 260 °C peak reflow | Eliminates moisture sensitivity concerns and enables single-pass lead-free assembly |
| Halogen-free & RoHS-compliant (M3) | Fulfills strict environmental requirements for automotive and industrial OEM supply chains |
Applications
| Automotive Power Distribution | Industrial Motor Drive I/O Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs and body control modules from load-dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp positive surges exceeding 33.3 V. Use Value: Limits clamped voltage to 53.9 V at 28 A, preventing damage to 36 V-rated DC-DC converters and microcontrollers. |
Use Scenario: Safeguarding PLC analog input channels connected to 4–20 mA sensors exposed to relay-coil switching noise. IC Role / Device Role / Timing Role: Standoff-rated TVS on signal line to ground, suppressing sub-millisecond inductive spikes before they reach ADC front-end. Use Value: Sub-100 ns response and 1.0 μA leakage at 33.3 V preserve signal integrity and measurement accuracy. |
| Telecom Base Station Power Rails | Consumer Appliance Motor Control Boards |
Use Scenario: Secondary-side transient protection on +48 V telecom power supplies subject to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: High-power unidirectional suppressor shunting surge energy to chassis ground during 10/1000 μs events. Use Value: 1500 W rating and 75 °C/W RθJA allow sustained operation without thermal runaway in enclosed enclosures. |
Use Scenario: Protecting gate drivers and bootstrap circuits in washing machine inverter boards from MOSFET switching overshoot. IC Role / Device Role / Timing Role: Cathode-to-rail placement clamps positive voltage excursions on high-side driver supply nodes. Use Value: 53.9 V clamping ensures gate oxide safety margin for 60 V-rated N-channel MOSFETs during commutation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A-E3/57T | Lower PPPM (400 W), same SMC package, VWM = 33 V, VC = 53.3 V @ 7.5 A | Rated for lighter-duty transients; insufficient for IEC 61000-4-5 Level 4 | Select when cost-sensitive designs face only low-energy ESD or local switching noise |
| SMCJ33A-M3/86A | Same 1500 W rating, identical VWM/VBR/VC, but M3/86A tape-and-reel packaging (850 pcs/reel vs. 3500) | No functional difference; differs only in reel size and base quantity | Choose for smaller batch prototyping or where 13" reels are logistically constrained |
Compared with SMAJ33A-E3/57T and SMCJ33A-M3/86A, the SM15T33A-M3/9AT offers identical clamping performance to SMCJ33A but with higher volume packaging, while providing triple the surge capacity of SMAJ33A-making it optimal for high-reliability automotive and industrial surge zones.
Availability
SM15T39A-M3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive I/O protection, and telecom base station power rails requiring stable component supply, halogen-free compliance, and AEC-Q101 qualification pathway.
Supply support for SM15T39A-M3/9AT 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, TVS devices, and power MOSFETs with emphasis on reliability, ruggedness, and application-specific optimization.
The SM15T Series was engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where failure modes must be controlled and clamping precision is critical.
FAQ
What is the clamping voltage of SM15T39A-M3/9AT at its rated peak pulse current?
The SM15T39A-M3/9AT has a maximum clamping voltage (VC) of 53.9 V at 28.0 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is measured with the device mounted on 8.0 mm × 8.0 mm copper pads per terminal and represents the upper limit of voltage seen by protected circuitry during worst-case surge conditions. The SM15T39A-M3/9AT maintains this clamping performance across its specified operating temperature range.
Is SM15T39A-M3/9AT suitable for automotive applications requiring AEC-Q101 qualification?
The SM15T39A-M3/9AT itself is commercial-grade and halogen-free (M3 suffix), but not AEC-Q101 qualified. However, Vishay offers the functionally identical SM15T39AHM3_A/I variant-same electrical specs and SMC package-with full AEC-Q101 qualification. Engineers specifying SM15T39A-M3/9AT for automotive use should verify whether the HM3 version is required for compliance; the SM15T39A-M3/9AT remains suitable for non-qualified automotive subsystems where robustness is prioritized over formal certification.
How does the SM15T39A-M3/9AT differ from the SMAJ33A series in surge handling capability?
The SM15T39A-M3/9AT delivers 1500 W peak pulse power (10/1000 μs), whereas the SMAJ33A provides only 400 W. This threefold increase allows the SM15T39A-M3/9AT to safely absorb lightning-induced surges (IEC 61000-4-5 Level 4) and high-energy inductive switching transients that would exceed the SMAJ33A's rating. Both share similar VWM (~33 V) and VC (~53 V), but the SM15T39A-M3/9AT sustains clamping at 28 A versus 7.5 A for the SMAJ33A.
What does the "M3/9AT" suffix indicate in SM15T39A-M3/9AT?
The "M3" suffix denotes halogen-free, RoHS-compliant construction meeting JEDEC J-STD-020 MSL Level 1 reflow requirements. The "9AT" specifies packaging: 13-inch diameter plastic tape-and-reel containing 3500 units. This contrasts with "57T" (7-inch reel, 850 units) and "H"/"I" variants used for AEC-Q101 qualified versions. The SM15T39A-M3/9AT is fully compatible with standard SMT pick-and-place equipment and lead-free reflow profiles.
Can SM15T39A-M3/9AT be used in bidirectional configurations?
No-SM15T39A-M3/9AT is strictly unidirectional, indicated by the "A" (not "CA") suffix and cathode band marking. For bidirectional operation, Vishay specifies the SM15T39CA variant, which has symmetrical breakdown in both directions and no polarity marking. Using SM15T39A-M3/9AT in a bidirectional circuit would result in forward conduction during negative transients, potentially damaging the device or failing to protect the system. Always match suffix and application polarity.
SM15T39A-M3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- SM15T, 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):
- 28A
- 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)
SM15T39A-M3/9AT FAQ
1.How can I place an order for SM15T39A-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T39A-M3/9AT 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 SM15T39A-M3/9AT reliable?
The price and inventory of SM15T39A-M3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T39A-M3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T39A-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T39A-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T39A-M3/9AT?
SM15T39A-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T39A-M3/9AT 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 SM15T39A-M3/9AT?
For technical support, including SM15T39A-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T39A-M3/9AT requirements.
6.How does Aetrix verify that SM15T39A-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T39A-M3/9AT 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 SM15T39A-M3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T39A-M3/9AT?
All SM15T39A-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T39A-M3/9AT, 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 SM15T39A-M3/9AT part is unused and in its original packaging.
Return procedure for SM15T39A-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T39A-M3/9AT Tags
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