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Vishay General Semiconductor - Diodes Division SM15T12A-M3/57T
- Part No.:
- SM15T12A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T12A-M3/57T.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,673
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Product details
Overview
SM15T12A-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), 12 V standoff voltage (VWM = 10.2 V), and clamping voltage of 16.7 V at 90 A peak pulse current. It protects MOSFETs and signal lines in automotive sensor units against inductive switching transients.
For engineers reviewing the SM15T12A-M3/57T datasheet, SM15T12A-M3/57T pinout, SM15T12A-M3/57T application, or SM15T12A-M3/57T equivalent, key selection criteria include unidirectional polarity, 150 °C max junction temperature, halogen-free RoHS compliance (M3 suffix), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SM15T12A-M3/57T uses a glass-passivated silicon junction to achieve low clamping ratio (VC/VWM ≈ 1.64) and low dynamic impedance under transient stress. Its 10/1000 μs waveform rating targets lightning-induced and motor-switching surges with source impedances high enough to limit current within its 90 A IPPM.
Designed for fail-safe short-circuit operation under overstress, it meets MSL Level 1 per J-STD-020 (260 °C reflow peak), features matte tin-plated leads compliant with J-STD-002, and exhibits typical thermal resistance RθJA = 75 °C/W on standard PCB pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 10.2 V - Maximum continuous reverse operating voltage before leakage exceeds 5.0 μA |
| VBR min/max | 11.4 V / 12.6 V at 1.0 mA test current - Ensures reliable breakdown onset within tight tolerance band |
| VC @ IPPM | 16.7 V at 90.0 A (10/1000 μs) - Clamps transient energy to safe level for downstream 12 V logic or power stages |
| PPPM | 1500 W - Handles high-energy transients from inductive loads without degradation |
| TJ max | +150 °C - Enables use in under-hood automotive environments and industrial enclosures |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
| Compliance | Halogen-free, RoHS-compliant (M3 suffix), JESD201 Class 2 whisker resistant |
Pinout & Package
SM15T12A-M3/57T is housed in an SMC (DO-214AB) package with two terminals: cathode (marked by band) and anode. The device is unidirectional; polarity must be observed during PCB layout to ensure proper clamping direction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VIN > VBR |
| Anode | Reference/return path | Typically tied to system ground or low-impedance return plane for effective clamping |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables robust protection against lightning-induced surges and industrial motor switching events |
| Low clamping voltage (16.7 V @ 90 A) | Prevents overvoltage damage to 12 V-rated ICs and MOSFET gate drivers in automotive ECUs |
| Glass passivated junction | Ensures stable VBR and low leakage (<5 μA at VWM) across temperature and lifetime |
| MSL Level 1 (260 °C peak) | Supports single-reflow SMT assembly without moisture sensitivity concerns |
| Halogen-free & RoHS-compliant (M3) | Fulfills environmental compliance requirements for automotive and industrial OEM supply chains |
Applications
| Automotive Sensor Protection | Industrial Motor Drive I/O |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and Hall-effect sensor outputs in engine control modules exposed to load-dump and inductive kickback. IC Role / Device Role: Unidirectional TVS placed between signal line and chassis ground to clamp negative transients and absorb positive surges. Use Value: Maintains signal integrity below 16.7 V clamping threshold while surviving repeated 90 A pulses per ISO 7637-2 Pulse 1/2a. |
Use Scenario: Safeguarding PLC analog input channels connected to solenoid valves and contactors subject to 200 A inductive turn-off spikes. IC Role / Device Role: Primary front-end transient suppressor on 0–10 V or 4–20 mA input traces before signal conditioning circuitry. Use Value: Limits transient voltage to ≤16.7 V, preventing ADC saturation and op-amp rail-to-rail latch-up during field wiring faults. |
| Consumer Power Adapter Input | Telecom DC Power Feed |
Use Scenario: Secondary-side overvoltage suppression on 12 V output rails of AC/DC adapters powering routers and set-top boxes. IC Role / Device Role: Unidirectional clamping device between +12 V output and GND to absorb feedback transients from downstream capacitive loads. Use Value: Prevents 12 V rail overshoot beyond 16.7 V during hot-plug or load-step events, protecting USB-PD controllers and PMICs. |
Use Scenario: DC feed line protection in PoE-powered base stations where 12 V bias lines are routed alongside RF sections. IC Role / Device Role: Standoff-rated TVS on 12 V bias rail to suppress coupling noise from adjacent RF amplifiers and switching regulators. Use Value: Provides <5 μA leakage at 10.2 V, minimizing standby current impact while clamping ESD and burst transients to 16.7 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A-E3/57T (Vishay) | Lower PPPM (400 W), same VWM/VC, SMA package (smaller thermal mass) | Not suitable for lightning-level threats; limited to board-level ESD and low-energy switching noise | Select SM15T12A-M3/57T when IEC 61000-4-5 Level 3/4 or ISO 7637-2 Pulse 5a compliance is required. |
| 1.5KE12A (ON Semiconductor) | Through-hole DO-201 package, identical VWM/VC, but higher VBR tolerance (11.4–13.8 V) and 1500 W rating | Requires wave soldering or hand-soldering; incompatible with high-speed SMT lines | Choose SM15T12A-M3/57T for automated assembly, space-constrained layouts, and RoHS/halogen-free mandates. |
Compared with SMAJ12A-E3/57T and 1.5KE12A, the SM15T12A-M3/57T delivers equivalent clamping performance in a halogen-free, MSL Level 1 SMC package optimized for automotive-grade SMT production-making it the preferred choice for volume-manufactured 12 V systems requiring high-reliability transient immunity.
Availability
SM15T12A-M3/57T is available at Aetrix Electronics and suitable for automotive sensor units, industrial motor drive I/O interfaces, and telecom DC power feed circuits requiring stable component supply, halogen-free compliance, and AEC-Q101-ready qualification path.
Supply support for SM15T12A-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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on reliability, precision, and application-specific performance.
The SM15T Series was developed for high-power transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where 1500 W surge handling and fail-safe short-circuit behavior are critical design requirements.
FAQ
What is the clamping voltage of SM15T12A-M3/57T at its rated peak pulse current?
The SM15T12A-M3/57T has a maximum clamping voltage (VC) of 16.7 V when subjected to its rated peak pulse current of 90.0 A using the standardized 10/1000 μs waveform. This value is measured under specified test conditions per Figure 1 in Vishay document 88380 and ensures predictable overvoltage limiting for 12 V system components.
Is SM15T12A-M3/57T suitable for automotive applications?
Yes, SM15T12A-M3/57T is halogen-free and RoHS-compliant (M3 suffix), and belongs to the AEC-Q101-qualified SM15T family-though the specific part number SM15T12A-M3/57T carries commercial-grade qualification. For full AEC-Q101 compliance, select SM15T12AHM3_A/H or SM15T12AHM3_A/I variants with HM3 suffix and revision code.
What does the "M3" suffix indicate in SM15T12A-M3/57T?
The "M3" suffix in SM15T12A-M3/57T denotes halogen-free, RoHS-compliant construction with matte tin-plated leads that meet JESD201 Class 2 whisker resistance requirements. It distinguishes this variant from E3 (RoHS-compliant only) and HM3 (AEC-Q101 qualified + halogen-free) versions.
How is polarity identified on SM15T12A-M3/57T?
SM15T12A-M3/57T is a unidirectional TVS diode with cathode indicated by a visible band on the SMC (DO-214AB) package body. The banded end must be connected toward the protected line, while the anode connects to ground or reference potential to enable correct clamping action during positive transients.
What is the thermal resistance of SM15T12A-M3/57T under standard mounting conditions?
Under standard test conditions-mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads-the SM15T12A-M3/57T exhibits a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W. This value supports thermal design calculations for sustained power dissipation up to 6.5 W at 50 °C ambient.
SM15T12A-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):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 90A
- 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)
SM15T12A-M3/57T FAQ
1.How can I place an order for SM15T12A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T12A-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 SM15T12A-M3/57T reliable?
The price and inventory of SM15T12A-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 SM15T12A-M3/57T is usually 5 days.
3.What payment methods are accepted for SM15T12A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T12A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T12A-M3/57T?
SM15T12A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T12A-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 SM15T12A-M3/57T?
For technical support, including SM15T12A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T12A-M3/57T requirements.
6.How does Aetrix verify that SM15T12A-M3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T12A-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 SM15T12A-M3/57T meets industry standards.
7.What is the process for return or replacement of SM15T12A-M3/57T?
All SM15T12A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T12A-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 SM15T12A-M3/57T part is unused and in its original packaging.
Return procedure for SM15T12A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T12A-M3/57T Tags
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