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Vishay General Semiconductor - Diodes Division SM15T30A-E3/9AT
- Part No.:
- SM15T30A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T30A-E3/9AT.pdf
- Description:
- TVS DIODE 25.6VWM 41.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:207
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Product details
Overview
SM15T30A-E3/9AT 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 stand-off voltage (VWM = 25.6 V), 41.5 V max clamping voltage at 36 A peak pulse current, and 150 °C max junction temperature. It protects MOSFETs and sensor signal lines in automotive powertrain control modules against inductive switching transients.
For engineers reviewing the SM15T30A-E3/9AT datasheet, SM15T30A-E3/9AT pinout, SM15T30A-E3/9AT application, or SM15T30A-E3/9AT equivalent, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, peak pulse current capability under system source impedance, unidirectional polarity alignment with DC rail topology, and RoHS-compliant commercial-grade SMC packaging for automated surface-mount assembly.
Technical Context
This TVS operates as a voltage-clamped shunt protector: under normal bias it presents <1.0 μA reverse leakage at 25.6 V; when exposed to transients exceeding its 28.5–31.5 V breakdown range (measured at 1.0 mA), it avalanches to clamp the line at ≤41.5 V while conducting up to 36.0 A (10/1000 μs). Its low-inductance SMC package and glass-passivated junction ensure fast response (<1 ns) and stable performance across -65 °C to +150 °C.
The device is not intended for continuous conduction - it handles non-repetitive surges only, with failure mode specified as short-circuit under overstress. Thermal resistance is 75 °C/W (junction-to-ambient, on 8 mm × 8 mm copper pads), limiting sustained power dissipation to 6.5 W at 50 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 25.6 V - Maximum steady-state reverse voltage before leakage exceeds 1.0 μA; sets upper limit for protected circuit's operating DC rail. |
| VBR (min/max) | 28.5 V / 31.5 V - Breakdown occurs within this band at 1.0 mA test current; defines turn-on threshold tolerance for surge suppression timing. |
| VC @ IPPM | 41.5 V - Clamped voltage at 36.0 A peak pulse (10/1000 μs); must remain below protected device's absolute maximum input rating. |
| PPPM | 1500 W - Peak transient power handling per single 10/1000 μs pulse; validates suitability for lightning-induced or motor-switching threats. |
| IPPM | 36.0 A - Corresponding peak pulse current at VC; used with system source impedance to verify clamping compliance. |
| TJ max | +150 °C - Maximum allowable junction temperature; constrains PCB copper area and airflow requirements for thermal management. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on standard 8 mm × 8 mm pads; determines steady-state power derating above 25 °C ambient. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile, matte tin-plated leads, RoHS-compliant (E3 suffix), MSL Level 1 (260 °C reflow peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode of internal avalanche junction | Connected to protected line; cathode side faces positive rail in unidirectional configuration. |
| Anode | Cathode of internal avalanche junction | Connected to ground or return path; polarity marking ensures correct orientation during placement. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Validates robustness against high-energy transients from industrial motor switching or indirect lightning coupling. |
| 41.5 V clamping voltage at 36 A | Provides ≥15% margin below typical 48 V automotive microcontroller I/O absolute maximum ratings. |
| Glass-passivated chip junction | Ensures long-term reliability and stable VBR drift under thermal cycling and humidity exposure. |
| Low-inductance SMC package | Minimizes voltage overshoot during nanosecond-scale transient events, critical for fast-edge digital interfaces. |
| RoHS-compliant, commercial grade (E3) | Meets global environmental compliance without halogen restrictions; suitable for consumer and industrial applications. |
Applications
| Automotive Powertrain Control | Industrial Motor Drive I/O Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V CAN transceiver supply rails and GPIO lines in engine control units exposed to alternator load dump and solenoid coil flyback. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VCC and GND, clamping transients within 1 ns to prevent latch-up or gate oxide damage. Use Value: Withstands 36 A pulses while holding voltage at 41.5 V - sufficient margin below 45 V CAN PHY absolute maximum rating. | Use Scenario: Safeguarding analog input channels of PLC analog I/O modules connected to 4–20 mA current loops driving field actuators. IC Role / Device Role / Timing Role: Standoff-rated TVS on signal line to ground, suppressing inductive kickback from 24 V solenoid valves and contactors. Use Value: 25.6 V VWM allows full 20 mA loop operation; 41.5 V clamping prevents ADC overvoltage during 100 V/100 ns transients. |
| Consumer Appliance Mainboard ESD | Telecom Power Supply Input Stage |
Use Scenario: Secondary-level protection on AC-DC adapter output rails feeding microcontrollers in washing machines and HVAC controllers. IC Role / Device Role / Timing Role: Final-stage TVS on 5 V/3.3 V distribution net, absorbing residual surges after primary MOV filtering. Use Value: 1500 W rating handles residual energy from Class III surge tests; SMC footprint enables compact layout near connectors. | Use Scenario: Input-side transient suppression on 48 V telecom rectifier outputs feeding PoE injectors and baseband processors. IC Role / Device Role / Timing Role: Unidirectional TVS between 48 V bus and chassis ground, clamping conducted surges from upstream distribution lines. Use Value: 25.6 V VWM supports 48 V nominal with 2× margin; 41.5 V VC stays below 53 V DC-DC converter input limits. |
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 | 600 W PPPM, same VWM/VC but lower IPPM (24.7 A), SMA package (higher RθJA = 110 °C/W) | Limited to lower-energy threats; unsuitable for lightning-level surges or high-impedance motor drive environments | Select SMAJ30A only if system-level threat analysis confirms ≤600 W transient energy and thermal constraints allow higher junction rise. |
| SMCJ30A | Identical PPPM (1500 W), VWM (25.6 V), VC (41.5 V), and SMC package; differs in RoHS status (M3 = halogen-free vs. E3) | No functional or electrical difference; substitution requires verification of halogen-free requirement and tape/reel compatibility (9AT vs. 57T) | SMCJ30A-M3/9AT is a direct material-compliance alternative where halogen-free construction is mandated. |
Compared with SMAJ30A, SM15T30A-E3/9AT delivers 2.5× higher surge energy handling and superior thermal performance in the same board area; versus SMCJ30A, it shares identical electrical specs but uses RoHS-compliant (non-halogen-free) terminations, simplifying procurement for commercial-grade designs without halogen restrictions.
Availability
SM15T30A-E3/9AT is available at Aetrix Electronics and suitable for automotive powertrain control, industrial motor drive I/O protection, and telecom power supply input stage applications requiring stable component supply, consistent tape-and-reel delivery, and long-term lifecycle support.
Supply support for SM15T30A-E3/9AT 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, power handling, and automotive qualification.
The SM15T Series was designed specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where 1500 W surge immunity and AEC-Q101 readiness (in HE3 variants) are critical.
FAQ
What is the peak pulse current rating of the SM15T30A-E3/9AT?
The SM15T30A-E3/9AT has a peak pulse current (IPPM) rating of 36.0 A under the standard 10/1000 μs waveform. This value is measured at its maximum clamping voltage of 41.5 V and reflects the device's ability to safely divert high-energy transients without degradation, provided the system source impedance limits current to this level.
Does the SM15T30A-E3/9AT meet automotive qualification standards?
The SM15T30A-E3/9AT is RoHS-compliant and commercial-grade (E3 suffix); it is not AEC-Q101 qualified. For automotive applications requiring qualification, the variant SM15T30AHE3_A/I (with HE3 suffix) must be selected - that version carries AEC-Q101 certification and uses the same 13" tape-and-reel packaging (I suffix).
What is the meaning of the "-E3/9AT" suffix in SM15T30A-E3/9AT?
The "E3" denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads; "9AT" specifies packaging in 13-inch diameter plastic tape and reel, with a base quantity of 3500 units per reel. This format supports high-volume SMT assembly and is distinct from the 7-inch "57T" reel option.
How does the clamping voltage of SM15T30A-E3/9AT compare to its breakdown voltage?
The SM15T30A-E3/9AT has a breakdown voltage (VBR) range of 28.5 V to 31.5 V at 1.0 mA, while its maximum clamping voltage (VC) is 41.5 V at 36.0 A. This 10–13 V differential represents the dynamic voltage rise under full surge current and defines the protective margin available for downstream ICs.
Can SM15T30A-E3/9AT be used in bidirectional configurations?
No - SM15T30A-E3/9AT is unidirectional, indicated by the "A" suffix. Bidirectional operation requires the "CA" suffix (e.g., SM15T30CA). Using SM15T30A-E3/9AT on AC or bipolar signal lines would result in forward conduction during negative half-cycles, causing failure or malfunction.
SM15T30A-E3/9AT 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-E3/9AT FAQ
1.How can I place an order for SM15T30A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T30A-E3/9AT 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-E3/9AT reliable?
The price and inventory of SM15T30A-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T30A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T30A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T30A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T30A-E3/9AT?
SM15T30A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T30A-E3/9AT 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-E3/9AT?
For technical support, including SM15T30A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T30A-E3/9AT requirements.
6.How does Aetrix verify that SM15T30A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T30A-E3/9AT 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-E3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T30A-E3/9AT?
All SM15T30A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T30A-E3/9AT, 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-E3/9AT part is unused and in its original packaging.
Return procedure for SM15T30A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T30A-E3/9AT Tags
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