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Vishay General Semiconductor - Diodes Division SM15T30A-M3/9AT
- Part No.:
- SM15T30A-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T30A-M3/9AT.pdf
- Description:
- TVS DIODE 25.6VWM 41.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,802
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Product details
Overview
SM15T30A-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 V standoff voltage (VWM = 25.6 V), 41.5 V clamping voltage at 36 A peak pulse current, and operating up to +150 °C junction temperature. 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 SM15T30A-M3/9AT datasheet, SM15T30A-M3/9AT pinout, SM15T30A-M3/9AT application, or SM15T30A-M3/9AT equivalent, key selection criteria include verified clamping performance at IPPM, unidirectional polarity with cathode band marking, halogen-free RoHS compliance (M3 suffix), and SMC package thermal resistance (RθJA = 75 °C/W) for board-level surge immunity design.
Technical Context
This TVS diode uses a glass-passivated silicon junction to achieve low inductance and fast response (<1 ns) to transient overvoltages. Its breakdown voltage is specified at 28.5–31.5 V (IT = 1.0 mA), with clamping guaranteed at 41.5 V under 36 A 10/1000 μs pulse - enabling reliable protection of 3.3 V–24 V logic and power rails without overstressing downstream components.
The device operates across –65 °C to +150 °C and meets J-STD-020 MSL Level 1 (260 °C peak reflow). Its failure mode under overstress is short-circuit, supporting fail-safe system architecture. The SMC package provides mechanical robustness and thermal dissipation suitable for high-energy transient suppression on PCBs with minimum 8.0 mm × 8.0 mm copper pads per terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 25.6 V - maximum continuous reverse voltage before significant leakage; sets upper limit for protected circuit operating voltage. |
| VBR (Breakdown Voltage) | 28.5–31.5 V at 1.0 mA - ensures precise turn-on threshold for transient clamping without false triggering. |
| VC (Clamping Voltage) | 41.5 V at IPPM = 36 A (10/1000 μs) - defines worst-case voltage seen by protected IC during surge event. |
| PPPM (Peak Pulse Power) | 1500 W - supports robust immunity to IEC 61000-4-5 Level 4 (4 kV line-earth) surges when properly mounted. |
| RθJA | 75 °C/W - requires ≥8.0 mm × 8.0 mm copper pad per terminal to maintain TJ ≤ 150 °C under sustained 6.5 W dissipation. |
| Polarity & Marking | Unidirectional with cathode band - enables correct orientation in DC-biased protection paths; no marking for bidirectional variants. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant (M3 suffix), matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Protected circuit return path / surge sink node | Connected to ground or low-impedance reference; carries full transient current during clamping. |
| Anode | Protected line input / signal source side | Connected to I/O line or power rail being safeguarded; reverse-biased during normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse rating (10/1000 μs) | Enables single-device protection against lightning surges per IEC 61000-4-5 up to 4 kV in typical PCB layouts. |
| Glass-passivated junction | Ensures stable VBR over time and temperature; eliminates risk of junction degradation under repeated transient stress. |
| Low inductance SMC package | Minimizes voltage overshoot during fast transients (<1 ns rise time), critical for protecting high-speed digital interfaces. |
| Halogen-free, RoHS-compliant (M3) | Meets environmental compliance requirements for automotive and industrial end equipment without compromising surge capability. |
Applications
| Automotive Power Distribution | Industrial Motor Drive I/O Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V power inputs in body control modules against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC converter input to clamp spikes above 41.5 V. Use Value: Prevents damage to buck controller ICs during ISO 7637-2 Pulse 5a (12 V systems) with verified 36 A surge handling. |
Use Scenario: Shielding analog sensor inputs (e.g., current shunt amplifiers) from switching noise in variable-frequency drives. IC Role / Device Role / Timing Role: Clamping transient coupling onto 4–20 mA loop lines induced by IGBT commutation. Use Value: Maintains signal integrity below 41.5 V clamping level, avoiding ADC saturation and false fault detection. |
| Telecom Power Supply Inputs | Consumer Appliance Control Boards |
Use Scenario: Safeguarding AC-DC adapter secondary-side outputs against surges conducted from primary-side EMI filters. IC Role / Device Role / Timing Role: TVS connected across 5 V/12 V output rails to absorb residual transients escaping primary-side MOVs. Use Value: Delivers 1500 W pulse handling without derating at TA = 50 °C, ensuring reliability in enclosed telecom enclosures. |
Use Scenario: Protecting microcontroller GPIOs and relay driver circuits in washing machine main boards from inductive kickback. IC Role / Device Role / Timing Role: Bidirectional protection not applicable; SM15T30A-M3/9AT used on DC supply lines feeding solenoid drivers. Use Value: Withstands 200 A non-repetitive forward surge (IFSM), surviving repeated relay coil de-energization events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A | Lower PPPM (400 W), same VWM (25.6 V), larger VBR tolerance (28.5–33.3 V), SMA package (higher RθJA ≈ 110 °C/W) | Suitable only for lower-energy threats (IEC 61000-4-4); insufficient for IEC 61000-4-5 Level 3+ without parallel devices | Select SM15T30A-M3/9AT when 1500 W single-device surge margin is required and board space allows SMC footprint. |
| SMCJ30A | Same PPPM (1500 W), identical VWM/VBR/VC specs, but E3 suffix (RoHS-compliant, not halogen-free); same SMC package | No functional difference in protection performance; differs only in material compliance (halogen content) | Choose SM15T30A-M3/9AT where halogen-free certification (e.g., JESC 2011, IPC-1752) is mandated for final product compliance. |
Compared with SMAJ30A and SMCJ30A, SM15T30A-M3/9AT delivers identical surge clamping performance to SMCJ30A while meeting stricter halogen-free requirements, and significantly exceeds SMAJ30A's energy handling - making it optimal for automotive and industrial designs requiring both high-power transient immunity and green material compliance.
Availability
SM15T30A-M3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive I/O protection, and telecom power supply inputs requiring stable component supply, long-term lifecycle support, and halogen-free compliance.
Supply support for SM15T30A-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 optoelectronics with emphasis on reliability and application-specific performance.
The SM15T Series was designed specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where 1500 W surge immunity, AEC-Q101 qualification readiness, and halogen-free compliance are mandatory.
FAQ
What is the clamping voltage of SM15T30A-M3/9AT at its rated peak pulse current?
The SM15T30A-M3/9AT has a maximum clamping voltage (VC) of 41.5 V when subjected to its rated peak pulse current (IPPM) of 36 A under the standard 10/1000 μs waveform. This value is measured with the device mounted on 8.0 mm × 8.0 mm copper pads per terminal, and defines the upper voltage limit imposed on protected circuitry during surge events.
Is SM15T30A-M3/9AT suitable for automotive applications requiring AEC-Q101 qualification?
The SM15T30A-M3/9AT itself is commercial-grade (M3 suffix), not AEC-Q101 qualified. However, Vishay offers the functionally identical SM15T30AHM3_X variant (e.g., SM15T30AHM3_A/I) with AEC-Q101 qualification. For automotive use, SM15T30A-M3/9AT may be deployed in non-safety-critical subsystems where qualification is not mandated, but SM15T30AHM3_X is required for full compliance.
What does the "M3" suffix indicate in SM15T30A-M3/9AT?
The "M3" suffix in SM15T30A-M3/9AT denotes halogen-free, RoHS-compliant construction per Vishay's material categorization standards. It confirms compliance with JEDEC J-STD-20 MSL Level 1 (260 °C peak reflow), JESD 201 Class 2 whisker resistance, and UL 94 V-0 flammability rating - distinguishing it from E3 (RoHS only) and HM3 (AEC-Q101 + halogen-free) variants.
How does the SMC package of SM15T30A-M3/9AT affect thermal performance?
The SMC (DO-214AB) package of SM15T30A-M3/9AT provides a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. This enables safe operation at its 6.5 W steady-state power dissipation up to +50 °C ambient, and supports reliable 1500 W transient handling without thermal runaway during short-duration surges.
Can SM15T30A-M3/9AT be used in bidirectional transient protection circuits?
No - SM15T30A-M3/9AT is strictly unidirectional, as indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay specifies the "CA" suffix (e.g., SM15T30CA). Using SM15T30A-M3/9AT in AC or floating signal paths would result in forward conduction during negative half-cycles, causing malfunction or damage.
SM15T30A-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):
- 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-M3/9AT FAQ
1.How can I place an order for SM15T30A-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T30A-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 SM15T30A-M3/9AT reliable?
The price and inventory of SM15T30A-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 SM15T30A-M3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T30A-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T30A-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T30A-M3/9AT?
SM15T30A-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T30A-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 SM15T30A-M3/9AT?
For technical support, including SM15T30A-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T30A-M3/9AT requirements.
6.How does Aetrix verify that SM15T30A-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T30A-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 SM15T30A-M3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T30A-M3/9AT?
All SM15T30A-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T30A-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 SM15T30A-M3/9AT part is unused and in its original packaging.
Return procedure for SM15T30A-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T30A-M3/9AT Tags
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