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Vishay General Semiconductor - Diodes Division SM15T39A-M3/57T
- Part No.:
- SM15T39A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T39A-M3/57T.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,774
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Product details
Overview
SM15T39A-M3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 33.3 V stand-off voltage (VWM), 37.1–41.0 V breakdown voltage (VBR), and 53.9 V maximum clamping voltage at 28.0 A peak pulse current. It protects MOSFETs and signal lines in automotive sensor units against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T39A-M3/57T datasheet, SM15T39A-M3/57T pinout, SM15T39A-M3/57T application, or SM15T39A-M3/57T equivalent, key selection criteria include verified clamping performance at 28.0 A IPPM, halogen-free RoHS-compliant construction (M3 suffix), and AEC-Q101 qualification readiness via HM3 variant - critical for industrial and automotive ESD/surge co-design.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, designed to shunt transient energy above 33.3 V while maintaining low leakage (<1.0 μA at VWM) and low dynamic impedance. Its glass-passivated junction ensures stable breakdown and repeatable clamping under repetitive surge stress.
Thermal design relies on RθJA = 75 °C/W (typ.) and RθJL = 15 °C/W (typ.), requiring minimum 8.0 mm × 8.0 mm copper pads per terminal for full 1500 W rating. Failure mode under overstress is short-circuit, aligning with IEC 61000-4-5 system-level surge protection requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33.3 V - Maximum continuous reverse operating voltage before clamping begins; sets system-level DC margin for protected line. |
| VBR (min/max) | 37.1 V / 41.0 V at 1.0 mA - Confirmed breakdown threshold range; ensures reliable turn-on without premature conduction. |
| VC @ IPPM | 53.9 V at 28.0 A (10/1000 μs) - Clamped voltage during worst-case surge; defines maximum stress on downstream ICs. |
| PPPM | 1500 W - Peak pulse power handling capability; validates suitability for IEC 61000-4-5 Level 4 (4 kV) surge testing. |
| IFSM | 200 A - 10 ms half-sine forward surge rating; supports high-energy inductive load switching events. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated pick-and-place. |
Pinout & Package
SM15T39A-M3/57T uses the SMC (DO-214AB) package: molded epoxy case meeting UL 94 V-0, matte tin-plated leads solderable per J-STD-002, and cathode identified by a band on the body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or low-impedance return path; completes clamping loop during transient events. |
| Cathode | Protected line interface | Connected to I/O or power line being safeguarded; conducts avalanche current when VIN exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Validated clamping capacity for lightning-induced surges per IEC 61000-4-5; eliminates need for cascaded protection stages. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage stress on downstream silicon; preserves timing margins in high-speed sensor interfaces. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets automotive and industrial environmental compliance mandates without compromising thermal or electrical performance. |
| MSL Level 1 (260 °C peak reflow) | Enables single-pass lead-free assembly without moisture sensitivity concerns or baking requirements. |
| AEC-Q101 qualification path (HM3 variant) | Supports drop-in qualification upgrade for automotive ECUs without redesign; same footprint and electrical behavior. |
Applications
| Automotive Sensor Protection | Industrial Motor Drive I/O |
|---|---|
Use Scenario: Protecting LIN bus transceivers and Hall-effect position sensors in engine control modules exposed to load-dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between sensor signal line and chassis ground to limit transient excursions to ≤53.9 V. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V sensor interface ICs during ISO 7637-2 Pulse 1/2b events. |
Use Scenario: Safeguarding analog input channels of PLC analog I/O modules connected to 24 V DC field sensors near contactors and solenoids. IC Role / Device Role / Timing Role: Standoff-rated TVS (33.3 V) placed upstream of precision op-amp front-end to absorb 1500 W switching spikes. Use Value: Maintains <1.0 μA leakage at 24 V nominal, avoiding offset drift in 16-bit ADC measurement paths. |
| Telecom Line Interface | Consumer Power Adapter Feedback Loop |
Use Scenario: Shielding RS-485 transceiver pins in base station remote units subjected to induced surges from nearby AC mains wiring. IC Role / Device Role / Timing Role: Fast-response unidirectional suppressor tied between differential pair and local ground plane to clamp common-mode transients. Use Value: Achieves <5 ns response time and 53.9 V clamping, preserving signal integrity up to 10 Mbps data rates. |
Use Scenario: Securing optocoupler feedback path in isolated AC/DC adapters against primary-side MOSFET switching noise coupling into secondary-side regulation. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ < 100 pF typical) placed across optocoupler input to suppress sub-100 ns ringing. Use Value: Prevents false triggering of TL431-based error amplifiers without adding phase lag to control loop. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A-E3/57T | Lower PPPM (400 W), higher VC (53.3 V @ 7.5 A), SMA package (smaller thermal mass) | Restricted to lower-energy threats (IEC 61000-4-2 ESD only); unsuitable for IEC 61000-4-5 surge | Select only if board space is constrained and surge threat level is limited to ±8 kV contact ESD. |
| SMCJ33A-M3/57T | Same SMC package, identical VWM/VBR, but rated for 3000 W PPPM and 64.3 V VC @ 46.7 A | Higher clamping voltage reduces margin for 3.3 V logic; better suited for 24–48 V systems with robust downstream ICs | Choose when protecting 24 V CAN or Ethernet PHYs where higher clamping is acceptable for doubled surge headroom. |
Compared with SM15T39A-M3/57T, SMAJ33A-E3/57T trades surge robustness for size, while SMCJ33A-M3/57T delivers double the power rating at the cost of 10.4 V higher clamping - making SM15T39A-M3/57T the optimal balance of compactness, clamping tightness, and 1500 W capability for 3.3–5 V signal-line protection.
Availability
SM15T39A-M3/57T is available at Aetrix Electronics and suitable for automotive sensor units, industrial PLC analog I/O modules, and telecom RS-485 interface designs requiring stable component supply with halogen-free compliance and SMC footprint consistency.
Supply support for SM15T39A-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, and protection devices with emphasis on reliability, thermal performance, and automotive-grade qualification.
The SM15T Series was developed to deliver high-power transient suppression in standard SMC packages for automotive, industrial, and telecom applications where space-constrained layouts demand 1500 W surge capability without sacrificing clamping precision.
FAQ
What is the peak pulse current rating of SM15T39A-M3/57T at 10/1000 μs waveform?
The SM15T39A-M3/57T has a peak pulse current (IPPM) rating of 28.0 A when tested with a 10/1000 μs waveform. This value is directly specified in the Vishay datasheet (Document Number: 88380, page 2) and corresponds to its 1500 W peak pulse power rating at the clamping voltage of 53.9 V. The rating assumes mounting on 8.0 mm × 8.0 mm copper pads per terminal.
Does SM15T39A-M3/57T meet AEC-Q101 qualification?
The SM15T39A-M3/57T itself is not AEC-Q101 qualified; it is the commercial-grade halogen-free variant. However, the HM3-suffixed version (e.g., SM15T39AHM3_A/H) is explicitly stated as AEC-Q101 qualified in the Vishay documentation. Engineers requiring automotive qualification should select the HM3 variant while retaining identical electrical specs and SMC package dimensions.
What is the maximum clamping voltage for SM15T39A-M3/57T and under what test condition?
The maximum clamping voltage (VC) for SM15T39A-M3/57T is 53.9 V, measured at a peak pulse current (IPPM) of 28.0 A using the standardized 10/1000 μs double-exponential waveform. This parameter is confirmed in the Electrical Characteristics table (page 2 of datasheet 88380) and defines the upper voltage limit imposed on protected circuitry during surge events.
How does the M3 suffix affect the material composition of SM15T39A-M3/57T?
The M3 suffix on SM15T39A-M3/57T indicates halogen-free, RoHS-compliant construction per Vishay's material categorization standard. This means the molding compound contains no brominated or chlorinated flame retardants, and all terminations use matte tin plating compliant with JESD 22-B102. It meets JEDEC J-STD-020 MSL Level 1 with 260 °C peak reflow tolerance.
Can SM15T39A-M3/57T be used in bidirectional transient protection applications?
No - SM15T39A-M3/57T is a unidirectional TVS diode, as indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay specifies the "CA" suffix (e.g., SM15T39CA-M3/57T). Using the unidirectional SM15T39A-M3/57T on AC-coupled or symmetrical signal lines would result in forward conduction during negative transients, causing failure or malfunction.
SM15T39A-M3/57T 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-M3/57T FAQ
1.How can I place an order for SM15T39A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T39A-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 SM15T39A-M3/57T reliable?
The price and inventory of SM15T39A-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 SM15T39A-M3/57T is usually 5 days.
3.What payment methods are accepted for SM15T39A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T39A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T39A-M3/57T?
SM15T39A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T39A-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 SM15T39A-M3/57T?
For technical support, including SM15T39A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T39A-M3/57T requirements.
6.How does Aetrix verify that SM15T39A-M3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T39A-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 SM15T39A-M3/57T meets industry standards.
7.What is the process for return or replacement of SM15T39A-M3/57T?
All SM15T39A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T39A-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 SM15T39A-M3/57T part is unused and in its original packaging.
Return procedure for SM15T39A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T39A-M3/57T Tags
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