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Vishay General Semiconductor - Diodes Division SM15T15CA-E3/57T
- Part No.:
- SM15T15CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T15CA-E3/57T.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:310
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Product details
Overview
SM15T15CA-E3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 15 V standoff voltage (VWM), 21.2 V max clamping voltage at 71 A IPPM, and operating from −65 °C to +150 °C. It protects signal lines in automotive sensor units against inductive switching transients.
For engineers reviewing the SM15T15CA-E3/57T datasheet, SM15T15CA-E3/57T pinout, SM15T15CA-E3/57T application, or SM15T15CA-E3/57T equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM = 1.41), RoHS-compliant commercial-grade construction, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This bidirectional TVS diode uses a glass-passivated silicon junction to deliver symmetrical clamping in both polarities, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its low-inductance SMC package and 15 Ω typical junction-to-lead thermal resistance support robust surge handling under high-impedance source conditions.
The device meets J-STD-020 MSL Level 1 (260 °C peak reflow) and exhibits a 10.4 × 10⁻⁴/°C temperature coefficient of breakdown voltage (αT), ensuring stable clamping across industrial temperature ranges. Failure mode under overstress is short-circuit, aligning with fail-safe system design requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse voltage before leakage exceeds 1 μA; defines safe operating margin for 12 V nominal systems. |
| VBR (min/max) | 14.3 V / 15.8 V at 1 mA - Confirmed breakdown threshold ensures reliable turn-on during fast transients. |
| VC @ IPPM | 21.2 V at 71 A (10/1000 μs) - Clamping voltage limits downstream IC stress to ≤21.2 V during lightning-level surges. |
| PPPM | 1500 W - Peak pulse power rating validates suitability for IEC 61000-4-5 Level 4 (4 kV) surge immunity designs. |
| RθJL | 15 °C/W - Low junction-to-lead thermal resistance enables effective heat transfer to PCB copper pads without heatsink. |
| TJ max. | +150 °C - Supports operation in under-hood automotive environments and industrial enclosures. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, UL 94 V-0 molding compound. Bidirectional construction has no polarity marking; terminals are symmetric anode/cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Accepts reverse surge current during negative-going transients; clamps to ≤21.2 V. |
| Cathode | Transient current entry (positive polarity) | Accepts forward surge current during positive-going transients; clamps to ≤21.2 V. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC or differential lines (e.g., CAN, RS-485) without external polarity management. |
| 1500 W peak pulse power | Withstands 71 A surge current (10/1000 μs), meeting IEC 61000-4-5 surge test requirements for industrial equipment. |
| Low clamping ratio (VC/VWM = 1.41) | Minimizes overvoltage stress on protected ICs compared to alternatives with ratios >1.5. |
| MSL Level 1 reflow compatibility | Supports standard lead-free reflow profiles up to 260 °C peak, eliminating special handling in SMT lines. |
Applications
| Automotive Sensor Protection | Industrial I/O Line Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) in engine control modules from load-dump and inductive kickback. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between signal line and ground, responding within nanoseconds to transients exceeding 15 V. Use Value: Limits voltage seen by downstream ASIC to ≤21.2 V, preventing latch-up or gate oxide damage in 3.3 V/5 V interface ICs. |
Use Scenario: Shielding PLC analog input channels (4–20 mA, 0–10 V) from ESD and switching noise generated by solenoid valves and contactors. IC Role / Device Role / Timing Role: Primary surge suppression element located at connector entry point, shunting energy before reaching precision ADC front-end. Use Value: Maintains signal integrity by clamping transients before they induce offset errors or saturate op-amp stages. |
| Telecom Data Line Protection | Consumer Device USB Port Protection |
Use Scenario: Safeguarding Ethernet PHY interfaces (10/100BASE-TX) against induced surges from nearby AC wiring or lightning coupling. IC Role / Device Role / Timing Role: Common-mode TVS pair (two SM15T15CA devices) across differential pairs, providing symmetrical clamping. Use Value: Preserves signal eye diagram integrity by limiting common-mode overvoltage to <21.2 V while maintaining <0.5 pF junction capacitance per line. |
Use Scenario: Adding secondary surge protection to USB 2.0 data lines (D+/D−) in smart home hubs exposed to user-accessible ports. IC Role / Device Role / Timing Role: Secondary clamping stage after primary ESD diode array, absorbing residual energy from 8/20 μs surges. Use Value: Extends system-level surge withstand to 4 kV (IEC 61000-4-5) without degrading high-speed signal rise time due to low inductance SMC layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CA | 600 W PPPM, 24.4 V VC @ 24.3 A IPPM, SMB package (smaller footprint, lower surge rating) | Lower power handling limits use to sub-2 kV surge environments; unsuitable for IEC 61000-4-5 Level 4. | Select when board space is constrained and threat level is limited to ESD + minor switching noise. |
| SMCJ15CA | 1500 W PPPM, identical VWM/VC specs, same SMC package but higher TJ max. (175 °C) and AEC-Q101 qualification option | Supports extended temperature range and automotive qualification; otherwise functionally interchangeable in commercial designs. | Choose for automotive-grade compliance or extended high-temp operation beyond 150 °C. |
Compared with SM15T15CA-E3/57T, SMBJ15CA offers smaller size but sacrifices 60% surge energy absorption, while SMCJ15CA matches all electrical specs and adds AEC-Q101 readiness-making it a drop-in upgrade path for automotive programs without layout change.
Availability
SM15T15CA-E3/57T is available at Aetrix Electronics and suitable for automotive sensor units, industrial PLC I/O modules, telecom data line interfaces, and consumer USB port protection requiring stable component supply and RoHS-compliant commercial-grade TVS diodes.
Supply support for SM15T15CA-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, TVS, MOSFETs, and optoelectronics with emphasis on reliability and application-specific performance.
The SM15T Series is designed specifically for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where 1500 W surge capability and fail-safe short-circuit behavior are critical.
FAQ
What does the "CA" suffix indicate in SM15T15CA-E3/57T?
The "CA" suffix denotes a bidirectional configuration, meaning the SM15T15CA-E3/57T provides symmetrical clamping for both positive and negative voltage transients. Unlike unidirectional variants (e.g., SM15T15A), it has no polarity marking and functions identically in either direction-ideal for protecting AC-coupled or differential signal lines such as CAN or RS-485 without external circuitry.
What is the maximum clamping voltage of SM15T15CA-E3/57T under standard test conditions?
The SM15T15CA-E3/57T has a maximum clamping voltage (VC) of 21.2 V when subjected to a 10/1000 μs waveform at its peak pulse current (IPPM) of 71 A. This value is measured per Figure 1 in Vishay document 88380 and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
Is SM15T15CA-E3/57T suitable for automotive applications?
SM15T15CA-E3/57T is RoHS-compliant and commercial-grade (E3 suffix); it is not AEC-Q101 qualified. For automotive use, Vishay offers the SM15T15CAHE3 variant (HE3 suffix), which carries AEC-Q101 qualification. The SM15T15CA-E3/57T remains appropriate for non-safety-critical automotive subsystems where qualification is not mandated.
How does the SMC (DO-214AB) package of SM15T15CA-E3/57T affect PCB layout?
The SMC package of SM15T15CA-E3/57T requires 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal for rated thermal performance. Its low-inductance structure minimizes voltage overshoot during fast transients, and the symmetric bidirectional terminal layout eliminates orientation concerns during automated placement-reducing assembly complexity and misalignment risk.
What is the thermal resistance specification for SM15T15CA-E3/57T, and why does it matter?
SM15T15CA-E3/57T has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W. This low value enables efficient heat transfer from the silicon junction to the PCB copper pads during surge events, preventing thermal runaway and sustaining repeated surge capability. It directly supports the 1500 W peak pulse rating when mounted per recommended pad layout.
SM15T15CA-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):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 71A
- 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)
SM15T15CA-E3/57T FAQ
1.How can I place an order for SM15T15CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T15CA-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 SM15T15CA-E3/57T reliable?
The price and inventory of SM15T15CA-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 SM15T15CA-E3/57T is usually 5 days.
3.What payment methods are accepted for SM15T15CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T15CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T15CA-E3/57T?
SM15T15CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T15CA-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 SM15T15CA-E3/57T?
For technical support, including SM15T15CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T15CA-E3/57T requirements.
6.How does Aetrix verify that SM15T15CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T15CA-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 SM15T15CA-E3/57T meets industry standards.
7.What is the process for return or replacement of SM15T15CA-E3/57T?
All SM15T15CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T15CA-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 SM15T15CA-E3/57T part is unused and in its original packaging.
Return procedure for SM15T15CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T15CA-E3/57T Tags
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