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Vishay General Semiconductor - Diodes Division SM15T30A-M3/57T
- Part No.:
- SM15T30A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T30A-M3/57T.pdf
- Description:
- TVS DIODE 25.6VWM 41.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SM15T30A-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), 30 V standoff voltage (VWM = 25.6 V), 41.5 V clamping voltage at 36 A IPPM, and 150 °C max junction temperature - used to protect MOSFETs, ICs, and sensor signal lines against lightning-induced and inductive-switching transients in automotive and industrial power supplies.
For engineers reviewing the SM15T30A-M3/57T datasheet, SM15T30A-M3/57T pinout, SM15T30A-M3/57T application, or SM15T30A-M3/57T equivalent, key selection criteria include verified clamping performance at 36 A, halogen-free RoHS-compliant construction (M3 suffix), unidirectional polarity with cathode band marking, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SM15T30A-M3/57T employs a glass-passivated silicon junction optimized for low-inductance transient suppression. Its 1500 W peak pulse rating is defined under standardized 10/1000 μs waveform conditions with derating above 25 °C ambient per Fig. 2, and thermal resistance is specified as RθJA = 75 °C/W (typ.) and RθJL = 15 °C/W (typ.).
It operates across -65 °C to +150 °C junction temperature range and fails short-circuit under overstress. The device meets J-STD-020 MSL Level 1 (260 °C peak reflow), JESD 201 Class 2 whisker resistance, and UL 94 V-0 flammability for molding compound.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 1500 W - sustains single high-energy transients from lightning or motor switching without degradation |
| Standoff Voltage (VWM) | 25.6 V - maximum continuous reverse voltage before conduction begins; sets operating margin below clamping threshold |
| Breakdown Voltage (VBR) | 28.5–31.5 V at 1.0 mA - defines onset of avalanche conduction; ensures reliable turn-on before system damage |
| Clamping Voltage (VC) | 41.5 V at 36 A IPPM - limits downstream voltage during surge; critical for protecting 3.3 V/5 V/24 V logic and power stages |
| Peak Pulse Current (IPPM) | 36 A (10/1000 μs) - quantifies maximum surge current the device can safely shunt to ground |
| Junction Temperature Range | -65 °C to +150 °C - supports operation in under-hood automotive and industrial environments |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
Pinout & Package
SM15T30A-M3/57T uses the SMC (DO-214AB) package: molded plastic case with matte tin-plated leads, 0.305" × 0.220" (7.75 mm × 5.59 mm) body, cathode band marking on one end, and recommended 8.0 mm × 8.0 mm copper pad layout per terminal for thermal and surge performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection in unidirectional configuration | Connected to circuit ground or return path; completes current loop during transient clamp |
| Cathode (banded end) | High-side connection in unidirectional configuration | Connected to protected line (e.g., 24 V rail or sensor output); blocks reverse leakage until breakdown |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) without derating in typical PCB layouts |
| Glass-passivated junction | Ensures stable VBR over time and temperature; eliminates risk of moisture-induced parameter drift |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets automotive and industrial environmental compliance requirements without compromising surge capability |
| Low inductance design | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), improving clamping fidelity |
| MSL Level 1 reflow rating | Supports standard lead-free reflow profiles up to 260 °C peak without delamination or parametric shift |
Applications
| Automotive Power Distribution | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 24 V supply rails in engine control units (ECUs) and body control modules (BCMs) against load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC input to clamp transients before regulator stage. Use Value: Clamps to 41.5 V at 36 A, preventing overvoltage damage to 36 V-rated buck controllers and ensuring ASIL-B functional safety compliance. |
Use Scenario: Safeguarding analog input channels (0–10 V, 4–20 mA) in programmable logic controllers against field-wiring induced surges. IC Role / Device Role / Timing Role: Front-end transient suppressor on signal conditioning PCB, positioned before op-amp buffers and ADC inputs. Use Value: Limits transient energy to <15 mJ per event, preserving measurement accuracy and avoiding latch-up in precision instrumentation amplifiers. |
| Consumer Appliance Motor Control | Telecom Power Interface |
Use Scenario: Shielding gate drivers and microcontrollers in washing machine inverter boards from back-EMF spikes generated by BLDC motors. IC Role / Device Role / Timing Role: Parallel-connected TVS on half-bridge high-side and low-side supply rails to absorb commutation spikes. Use Value: Withstands repetitive 200 A IFSM surges and maintains clamping stability across 10⁵ switching cycles, extending board lifetime. |
Use Scenario: Protecting PoE-powered Ethernet ports (IEEE 802.3af/at) from lightning-induced common-mode surges on data pairs and power lines. IC Role / Device Role / Timing Role: Unidirectional TVS on DC bias lines feeding isolated DC-DC converters, coordinated with common-mode chokes. Use Value: Delivers 1500 W pulse handling while maintaining <1 μA ID at 25.6 V, minimizing standby power loss in always-on network infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A-E3/57T (Vishay) | 600 W PPPM rating, SMA package (smaller footprint), higher RθJA (110 °C/W), same VWM/VC specs | Limited to lower-energy threats (IEC 61000-4-4); unsuitable for lightning-level surges | Select when space-constrained and threat level is ≤1 kV/50 Ω |
| 1.5SMC30A (ON Semiconductor) | Identical 1500 W PPPM, SMC package, but VWM = 25.6 V and VC = 41.5 V match exactly; RoHS-compliant but not halogen-free | No M3 suffix - lacks halogen-free certification required for some automotive Tier 1 programs | Use where halogen-free compliance is not mandated and cost optimization is prioritized |
Compared with SMAJ30A-E3/57T and 1.5SMC30A, SM15T30A-M3/57T uniquely combines full 1500 W surge capacity, halogen-free construction, and MSL Level 1 reflow compatibility - making it the preferred choice for AEC-Q101-aligned automotive designs and high-reliability industrial deployments requiring documented environmental compliance.
Availability
SM15T30A-M3/57T is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC I/O protection, consumer appliance motor control, and telecom power interface applications requiring stable component supply, long-term lifecycle support, and traceable halogen-free sourcing.
Supply support for SM15T30A-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, TVS devices, and optoelectronics with emphasis on reliability, ruggedness, and application-specific validation.
The SM15T Series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure modes must be predictable (short-circuit) and performance must remain stable across temperature and lifetime.
FAQ
What is the clamping voltage of SM15T30A-M3/57T at its rated peak pulse current?
The SM15T30A-M3/57T has a maximum clamping voltage (VC) of 41.5 V when subjected to its rated peak pulse current (IPPM) of 36 A 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 it defines the upper voltage limit imposed on protected circuitry during surge events.
Is SM15T30A-M3/57T suitable for automotive applications requiring AEC-Q101 qualification?
No - SM15T30A-M3/57T carries the M3 suffix (halogen-free, RoHS-compliant commercial grade), not HM3 or HE3. For AEC-Q101 qualification, the correct part is SM15T30AHM3_A/H or SM15T30AHE3_A/H, which include the "_A/H" revision code and explicit AEC-Q101 testing per the Vishay ordering table.
What does the "/57T" suffix indicate in SM15T30A-M3/57T?
The "/57T" suffix denotes the packaging configuration: 7-inch diameter plastic tape and reel, with a base quantity of 850 units per reel. This format is optimized for high-speed SMT placement equipment and aligns with standard JEDEC carrier specifications for DO-214AB devices.
How does the thermal resistance of SM15T30A-M3/57T affect its power dissipation capability?
With a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W, the SM15T30A-M3/57T dissipates only 6.5 W continuously at TA = 50 °C. This means sustained power handling is limited - the device is designed for transient, not steady-state, dissipation. Its 1500 W rating applies only to non-repetitive pulses per Fig. 1 and Fig. 2 derating curves.
Can SM15T30A-M3/57T be used in bidirectional configurations?
No - SM15T30A-M3/57T is unidirectional, indicated by the "A" suffix (not "CA"). Bidirectional variants require the "CA" suffix (e.g., SM15T30CA-M3/57T) and exhibit symmetrical breakdown in both directions. Using SM15T30A-M3/57T in reverse-biased AC signal paths would result in forward conduction and potential failure.
SM15T30A-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):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.5V
- Current - Peak Pulse (10/1000µs):
- 36A
- 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)
SM15T30A-M3/57T FAQ
1.How can I place an order for SM15T30A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T30A-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 SM15T30A-M3/57T reliable?
The price and inventory of SM15T30A-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 SM15T30A-M3/57T is usually 5 days.
3.What payment methods are accepted for SM15T30A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T30A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T30A-M3/57T?
SM15T30A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T30A-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 SM15T30A-M3/57T?
For technical support, including SM15T30A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T30A-M3/57T requirements.
6.How does Aetrix verify that SM15T30A-M3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T30A-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 SM15T30A-M3/57T meets industry standards.
7.What is the process for return or replacement of SM15T30A-M3/57T?
All SM15T30A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T30A-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 SM15T30A-M3/57T part is unused and in its original packaging.
Return procedure for SM15T30A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T30A-M3/57T Tags
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