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Vishay General Semiconductor - Diodes Division SM15T36A-M3/9AT
- Part No.:
- SM15T36A-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T36A-M3/9AT.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,218
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Product details
Overview
SM15T36A-M3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 30.8 V stand-off voltage (VWM), 34.2–37.8 V breakdown voltage (VBR), and 49.9 V clamping voltage (VC) at 30.0 A peak pulse current. It protects MOSFETs and ICs against lightning-induced and inductive-switching transients in automotive power supplies.
For engineers reviewing the SM15T36A-M3/9AT datasheet, SM15T36A-M3/9AT pinout, SM15T36A-M3/9AT application, or SM15T36A-M3/9AT equivalent, key selection criteria include clamping voltage margin relative to protected device's absolute maximum rating, thermal resistance (RθJA = 75 °C/W), halogen-free RoHS compliance (M3 suffix), and AEC-Q101 qualification path via HM3 variant.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, designed for placement across DC power rails or signal lines where transient energy must be shunted to ground without forward conduction during normal operation. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and repeatable breakdown behavior under repetitive surge stress.
The device delivers 1500 W peak pulse power per IEC 61000-4-5 (10/1000 μs waveform) with low clamping ratio (VC/VBR ≈ 1.34) and low parasitic inductance due to SMC package geometry. Thermal performance is specified with 0.31" × 0.31" copper pads, supporting reliable operation up to TJ = 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30.8 V - Maximum continuous reverse operating voltage before leakage exceeds 1.0 μA; sets upper limit for protected circuit's nominal rail voltage. |
| VBR (min/max) | 34.2 V / 37.8 V at 1.0 mA - Confirmed breakdown threshold range; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 49.9 V at 30.0 A (10/1000 μs) - Clamped voltage seen by downstream components; defines worst-case stress during surge. |
| PPPM | 1500 W - Peak transient power handling capability; validates suitability for Level 4 IEC 61000-4-5 immunity testing. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on standard 8.0 mm × 8.0 mm copper pads; informs derating above 25 °C ambient. |
| TJ max | 150 °C - Maximum allowable junction temperature; constrains sustained power dissipation and surge repetition rate. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant (M3 suffix), MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to system ground or return path; carries full surge current during clamping. |
| Cathode | High-side connection point | Marked with band; connects to protected line (e.g., 24 V rail); reverse-biased during normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Validated for IEC 61000-4-5 Level 4 surge immunity (4 kV line-earth, 2 kV line-line) in typical industrial layouts. |
| Glass-passivated junction | Ensures stable VBR tolerance (±5 %) and <1.0 μA leakage at VWM, critical for low-power sensor interfaces. |
| Low clamping ratio (VC/VBR ≈ 1.34) | Minimizes voltage overshoot during transients, reducing risk of gate oxide damage in protected MOSFETs. |
| Halogen-free & RoHS-compliant (M3) | Meets IPC-1752A material declaration requirements and EU Directive 2015/863 for restricted substances. |
Applications
| Automotive Power Rail Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: 24 V battery-supplied ECUs exposed to load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and ground to clamp transients before they reach DC-DC converters and microcontrollers. Use Value: With VC = 49.9 V, maintains stress below 55 V absolute maximum rating of common 50 V-input buck controllers. | Use Scenario: Analog input modules receiving 4–20 mA signals from field transmitters in factory environments. IC Role / Device Role / Timing Role: Primary protection element on signal line, paired with series resistor and secondary filtering. Use Value: Low leakage (<1.0 μA) prevents signal offset errors; fast response (<1 ns) limits transient propagation into precision ADC front-ends. |
| Telecom DC Power Interface | Consumer Appliance Motor Drive Protection |
Use Scenario: -48 V telecom rectifier outputs feeding base station backplanes. IC Role / Device Role / Timing Role: Standoff-rated TVS on primary DC bus to absorb lightning-induced surges coupled via long interconnects. Use Value: 1500 W rating supports coordination with upstream 10 kA SPDs; VWM = 30.8 V allows safe operation with -48 V nominal (derated for ripple and tolerance). | Use Scenario: Brushless DC motor inverters in washing machines subjected to coil-switching spikes. IC Role / Device Role / Timing Role: Rail-to-rail TVS across high-side FET source-drain to suppress VDS overshoot during commutation. Use Value: 200 A IFSM rating withstands repeated motor stall currents; SMC package enables automated placement near power stage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A-E3/57T | Same VWM (30.8 V), lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W) | Limited to lower-energy threats (IEC 61000-4-5 Level 2); unsuitable for direct lightning coupling paths. | Select when board space is constrained and surge threat level is defined as ≤1 kV line-earth. |
| SMCJ36A-M3/9AT | Same SMC package, identical VWM/VBR/VC, but rated for 3000 W PPPM (2× higher energy handling) | Supports longer-duration surges (e.g., 10/1000 μs at 60 A) and higher repetition rates without thermal runaway. | Choose when protecting against combined lightning + switching transients in harsh industrial settings. |
Compared with SMAJ36A-E3/57T, SM15T36A-M3/9AT provides 2.7× higher surge energy capacity in the same SMC footprint; versus SMCJ36A-M3/9AT, it trades 50 % peak power for tighter VBR tolerance (±5 % vs ±10 %) and lower unit cost in high-volume production.
Availability
SM15T36A-M3/9AT is available at Aetrix Electronics and suitable for automotive power rail protection, industrial PLC I/O protection, and telecom DC power interface applications requiring stable component supply, halogen-free compliance, and AEC-Q101 qualification readiness.
Supply support for SM15T36A-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 supplier of discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, automotive qualification, and power efficiency.
The SM15T Series is engineered for high-energy transient suppression in demanding environments, targeting design-in for automotive electronics, industrial controls, and infrastructure equipment where robustness against lightning and inductive switching is mandatory.
FAQ
What is the clamping voltage of SM15T36A-M3/9AT at its rated peak pulse current?
The SM15T36A-M3/9AT has a maximum clamping voltage (VC) of 49.9 V when subjected to a 10/1000 μs waveform at 30.0 A peak pulse current (IPPM). This value is measured under standardized test conditions with 0.31" × 0.31" copper pads and defines the upper voltage limit imposed on protected circuitry during surge events. The SM15T36A-M3/9AT maintains this clamping performance across its qualified operating temperature range.
Is SM15T36A-M3/9AT suitable for automotive applications?
Yes, SM15T36A-M3/9AT is halogen-free and RoHS-compliant (M3 suffix), and belongs to the AEC-Q101-qualified SM15T family. While the base M3 variant is commercial-grade, the automotive-qualified version is designated SM15T36AHM3_X (e.g., SM15T36AHM3_A). The SM15T36A-M3/9AT shares identical electrical characteristics and SMC package with the HM3 variant, enabling drop-in qualification path via minor suffix change and traceability documentation.
What does the "M3" suffix mean in SM15T36A-M3/9AT?
The "M3" suffix in SM15T36A-M3/9AT indicates halogen-free, RoHS-compliant construction meeting JEDEC J-STD-020 MSL Level 1 (260 °C peak reflow) and JESD 201 Class 2 whisker resistance. It distinguishes the part from E3 (RoHS-compliant only) and HM3 (AEC-Q101 qualified + halogen-free) variants. The SM15T36A-M3/9AT uses matte tin-plated leads solderable per J-STD-002 and JESD 22-B102 standards.
How does SM15T36A-M3/9AT compare to SMAJ36A in terms of surge handling?
SM15T36A-M3/9AT delivers 1500 W peak pulse power (10/1000 μs), whereas SMAJ36A is rated for 400 W - a 3.75× difference. Both share VWM = 30.8 V and similar VBR, but the SM15T36A-M3/9AT's larger SMC package enables higher surge current (30.0 A vs 12.3 A) and lower thermal resistance (75 °C/W vs 110 °C/W), making it suitable for Level 4 IEC 61000-4-5 testing where SMAJ36A would fail.
What is the maximum operating temperature for SM15T36A-M3/9AT?
The SM15T36A-M3/9AT has a maximum junction temperature (TJ) of +150 °C and an operating junction/storage temperature range of -65 °C to +150 °C. Derating of peak pulse power begins above 25 °C ambient, per Figure 2 in the datasheet (Document Number: 88380), with 100 % rating at 25 °C and ~50 % at 100 °C ambient on standard PCB pads. The SM15T36A-M3/9AT must be thermally managed to avoid exceeding TJ max under sustained surge duty cycles.
SM15T36A-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):
- 30.8V
- Voltage - Breakdown (Min):
- 34.2V
- Voltage - Clamping (Max) @ Ipp:
- 49.9V
- Current - Peak Pulse (10/1000µs):
- 30A
- 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)
SM15T36A-M3/9AT FAQ
1.How can I place an order for SM15T36A-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T36A-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 SM15T36A-M3/9AT reliable?
The price and inventory of SM15T36A-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 SM15T36A-M3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T36A-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T36A-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T36A-M3/9AT?
SM15T36A-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T36A-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 SM15T36A-M3/9AT?
For technical support, including SM15T36A-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T36A-M3/9AT requirements.
6.How does Aetrix verify that SM15T36A-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T36A-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 SM15T36A-M3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T36A-M3/9AT?
All SM15T36A-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T36A-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 SM15T36A-M3/9AT part is unused and in its original packaging.
Return procedure for SM15T36A-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T36A-M3/9AT Tags
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