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Vishay General Semiconductor - Diodes Division SM15T30CA-E3/57T
- Part No.:
- SM15T30CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T30CA-E3/57T.pdf
- Description:
- TVS DIODE 25.6VWM 41.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,864
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Product details
Overview
SM15T30CA-E3/57T from Vishay General Semiconductor is a bidirectional 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), and clamping voltage of 41.5 V at 36 A peak pulse current. It protects signal lines and power rails in automotive sensor units and industrial I/O interfaces against lightning-induced and switching transients.
For engineers reviewing the SM15T30CA-E3/57T datasheet, SM15T30CA-E3/57T pinout, SM15T30CA-E3/57T application, or SM15T30CA-E3/57T equivalent, key selection criteria include bidirectional clamping capability, 30 V VWM, 41.5 V VC at 36 A, AEC-Q101 qualification eligibility, and SMC package thermal performance with RθJA = 75 °C/W.
Technical Context
The SM15T30CA-E3/57T operates as a bidirectional avalanche diode with symmetrical breakdown behavior in both polarities, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable leakage (<1 μA at VWM) and repeatable clamping across temperature.
Designed for high-energy transient suppression, it delivers 1500 W peak pulse power under standardized 10/1000 μs waveform conditions when mounted on 8.0 mm × 8.0 mm copper pads. Failure mode under overstress is short-circuit, supporting fail-safe system design in automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR min / max | 28.5 V / 31.5 V - Breakdown voltage range at 1 mA test current; ensures reliable turn-on within specified tolerance band. |
| VC @ IPPM | 41.5 V at 36 A - Clamping voltage during 10/1000 μs transient; determines maximum voltage stress imposed on downstream ICs. |
| PPPM | 1500 W - Peak pulse power handling capacity; enables robust protection against lightning surges and inductive switching spikes. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive and high-ambient industrial environments. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance; informs heatsinking requirements for sustained power dissipation. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile, RoHS-compliant matte tin-plated leads. Meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; reverse-biased reference for clamping | One side of symmetrical bidirectional structure; no polarity marking required on device body. |
| Cathode | Current exit terminal in forward bias; reverse-biased reference for clamping | Other side of symmetrical bidirectional structure; functionally identical to Anode under reverse transient conditions. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC, differential, or floating signal lines without polarity-sensitive layout constraints. |
| 1500 W peak pulse power (10/1000 μs) | Supports compliance with IEC 61000-4-5 Level 4 (4 kV line-to-line) when properly mounted. |
| Glass passivated junction | Ensures stable leakage current (<1 μA at 30 V) and long-term reliability under thermal cycling. |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT assembly processes without moisture sensitivity concerns. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN, LIN, or analog sensor outputs (e.g., pressure, temperature) in engine control modules from load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across signal pair or supply rail to limit transient overvoltage. Use Value: Maintains signal integrity below 41.5 V during 36 A transients, preventing latch-up or damage to 3.3 V/5 V sensor interface ICs. |
Use Scenario: Shielding PLC digital input channels connected to external field wiring exposed to relay coil flyback and ESD events. IC Role / Device Role / Timing Role: Primary transient suppression element located at connector entry point before optocoupler or level-shifter. Use Value: Absorbs 1500 W surge energy while limiting voltage to ≤41.5 V, ensuring immunity to 1 kV/500 A IEC 61000-4-4 bursts. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Safeguarding Ethernet PHY or RS-485 transceivers on outdoor telecom equipment subject to induced lightning surges. IC Role / Device Role / Timing Role: Secondary-level protection device placed after gas discharge tube (GDT) in hybrid protection network. Use Value: Provides fast-response clamping (sub-nanosecond) with low dynamic impedance, complementing GDT's high-energy handling. |
Use Scenario: Input-stage surge protection for AC-DC adapters used in smart home hubs, guarding against mains-borne transients per IEC 61000-4-5. IC Role / Device Role / Timing Role: Bidirectional TVS across L-N or L/N-PE inputs to clamp common-mode and differential-mode surges. Use Value: Withstands repeated 10/1000 μs surges up to 36 A without degradation, meeting 5-year field reliability targets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30CA | Lower peak pulse power (600 W), same VWM (30 V), larger VC (48.4 V at 12.4 A), SMB package (smaller thermal mass) | Suitable only for lower-energy threats (IEC 61000-4-4 Level 3); not recommended for lightning-prone outdoor installations | Select SMBJ30CA only when board space is constrained and threat level is limited to switching transients. |
| SMCJ30CA | Same package (SMC), identical VWM/VC, but rated for 3000 W peak pulse power (10/1000 μs) and higher IPPM (87.5 A) | Required where full IEC 61000-4-5 Level 4 (4 kV line-earth) immunity must be achieved without derating | Choose SMCJ30CA when system-level testing demands >1500 W margin or extended surge lifetime under repetitive stress. |
Compared with SMBJ30CA, SM15T30CA-E3/57T delivers 2.5× higher surge power handling and tighter clamping; versus SMCJ30CA, it offers identical footprint and thermal profile but trades 50 % peak power capacity for cost and availability advantages in mid-tier industrial designs.
Availability
SM15T30CA-E3/57T is available at Aetrix Electronics and suitable for automotive sensor units, industrial PLC I/O modules, and telecom line interface circuits requiring stable component supply, RoHS compliance, and traceable sourcing.
Supply support for SM15T30CA-E3/57T 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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SM15T Series is designed specifically for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where failure modes must be predictable and clamping performance tightly controlled.
FAQ
What is the clamping voltage of SM15T30CA-E3/57T at its rated peak pulse current?
The SM15T30CA-E3/57T has a maximum clamping voltage (VC) of 41.5 V when subjected to its rated peak pulse current 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 JEDEC standards and defines the upper voltage limit imposed on protected circuitry during surge events.
Is SM15T30CA-E3/57T qualified for automotive applications?
The base SM15T30CA-E3/57T is commercial-grade and RoHS-compliant. However, Vishay offers AEC-Q101-qualified variants under ordering codes SM15T30CAHE3_A/H or SM15T30CAHM3_A/H. The SM15T30CA-E3/57T itself is not AEC-Q101 certified, though its construction and thermal specs align with automotive environmental requirements when used in non-safety-critical subsystems.
What does the "CA" suffix indicate in SM15T30CA-E3/57T?
The "CA" suffix in SM15T30CA-E3/57T explicitly denotes a bidirectional configuration. Unlike unidirectional variants ending in "A", the CA version provides symmetrical clamping in both polarities, making it suitable for protecting AC signals, differential buses, or floating nodes where voltage polarity reversal may occur during transients.
What is the maximum operating temperature for SM15T30CA-E3/57T?
The SM15T30CA-E3/57T has a maximum junction temperature (TJ) rating of +150 °C and an operating junction and storage temperature range of -65 °C to +150 °C. This allows reliable deployment in under-hood automotive locations and high-ambient industrial enclosures without derating below 125 °C ambient.
How does the SMC (DO-214AB) package of SM15T30CA-E3/57T compare thermally to SMA or SMB packages?
The SMC package of SM15T30CA-E3/57T provides significantly better thermal performance than SMA or SMB: its typical junction-to-ambient thermal resistance (RθJA) is 75 °C/W versus ~120–150 °C/W for SMA/SMB. This enables higher sustained power dissipation and improved surge survivability, especially when mounted on recommended 8.0 mm × 8.0 mm copper pads.
SM15T30CA-E3/57T 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:
- -
- Bidirectional Channels:
- 1
- 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)
SM15T30CA-E3/57T FAQ
1.How can I place an order for SM15T30CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T30CA-E3/57T 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 SM15T30CA-E3/57T reliable?
The price and inventory of SM15T30CA-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T30CA-E3/57T is usually 5 days.
3.What payment methods are accepted for SM15T30CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T30CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T30CA-E3/57T?
SM15T30CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T30CA-E3/57T 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 SM15T30CA-E3/57T?
For technical support, including SM15T30CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T30CA-E3/57T requirements.
6.How does Aetrix verify that SM15T30CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T30CA-E3/57T 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 SM15T30CA-E3/57T meets industry standards.
7.What is the process for return or replacement of SM15T30CA-E3/57T?
All SM15T30CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T30CA-E3/57T, 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 SM15T30CA-E3/57T part is unused and in its original packaging.
Return procedure for SM15T30CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T30CA-E3/57T Tags
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