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Vishay General Semiconductor - Diodes Division SM6T15CA-E3/5B
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- Part No.:
- SM6T15CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T15CA-E3/5B.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,283
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Product details
Overview
SM6T15CA-E3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping ESD and surge transients on signal/power lines. It features 15 V standoff voltage (VWM), 21.2 V max clamping voltage at 28 A peak pulse current, 600 W peak pulse power (10/1000 μs), and operates from −65 °C to +150 °C junction temperature.
For engineers reviewing the SM6T15CA-E3/5B datasheet, SM6T15CA-E3/5B pinout, SM6T15CA-E3/5B application, or SM6T15CA-E3/5B equivalent, this page delivers verified electrical parameters, polarity configuration, thermal resistance (RθJA = 100 °C/W), AEC-Q101 qualification status, and real-world protection use cases for automotive sensor interfaces and industrial I/O lines.
Technical Context
The SM6T15CA-E3/5B is a bidirectional TVS diode with symmetrical breakdown behavior-VBR min/max = 14.3 V / 15.8 V at 1 mA test current-and no cathode marking. Its low-inductance SMB package enables fast response (<1 ns) to transients while maintaining stable clamping under repetitive 10/1000 μs surges up to 600 W.
Thermal performance is defined by RθJL = 20 °C/W (junction-to-lead) and derating above 25 °C ambient per Figure 2; it meets J-STD-020 MSL Level 1 (260 °C peak reflow) and supports automated SMT placement with matte tin-plated leads compliant to JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12.8 V - Maximum reverse stand-off voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (min/max) | 14.3 V / 15.8 V at 1 mA - Confirmed bidirectional breakdown range; ensures symmetrical overvoltage triggering |
| VC @ IPPM | 21.2 V at 28 A (10/1000 μs) - Clamping voltage during worst-case surge; limits downstream IC stress to safe levels |
| PPPM | 600 W - Peak pulse power handling capability; sustains industry-standard lightning/surge waveforms without failure |
| TJ range | −65 °C to +150 °C - Extended junction temperature operation; suitable for under-hood automotive and industrial environments |
| RθJA | 100 °C/W - Thermal resistance to ambient on standard 0.2" × 0.2" copper pads; informs PCB thermal layout requirements |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); molded compound meets UL 94 V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | Either terminal accepts surge current; no fixed anode/cathode polarity due to symmetric construction |
| Cathode | Transient current exit (bidirectional) | Same as Anode-both terminals function identically; device conducts equally in both directions |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth) without degradation when properly mounted |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage overshoot during fast transients-critical for protecting 3.3 V/5 V logic interfaces |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow assembly without moisture-related popcorning or delamination |
| AEC-Q101 qualified option available | HE3/HM3 variants meet automotive reliability standards; SM6T15CA-E3/5B is commercial-grade but shares identical die and package |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt surge energy before reaching ASIC or MCU. Use Value: Limits transient voltage to ≤21.2 V, preventing latch-up or gate oxide damage in 5 V tolerant receivers while surviving repeated 10/1000 μs surges. | Use Scenario: Safeguarding digital input modules in programmable logic controllers against field-wiring induced transients and relay coil flyback. IC Role / Device Role / Timing Role: Parallel-connected TVS across input terminals to clamp induced spikes before optocoupler or Schmitt trigger input stage. Use Value: Provides 600 W surge immunity with <1 ns response-faster than MOVs-ensuring deterministic protection timing for 24 V DC control signals. |
| Consumer USB Port ESD Protection | Telecom Line Interface Surge Suppression |
Use Scenario: Secondary-level ESD protection on USB 2.0 data lines (D+/D−) in set-top boxes and smart displays. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed after primary ESD array to handle higher-energy CDM events. Use Value: Delivers 15 kV contact / 20 kV air discharge immunity per IEC 61000-4-2 while adding <0.5 pF parasitic capacitance-no signal integrity impact. | Use Scenario: Front-end surge suppression on Ethernet PHY or RS-485 transceiver lines in network switches and base stations. IC Role / Device Role / Timing Role: Primary surge diverter on differential pair, coordinated with common-mode chokes to divert longitudinal surges. Use Value: Handles combined lightning-induced surges (IEC 61000-4-5) and telecom-specific threats (GR-1089) with 21.2 V clamping-preserving receiver common-mode range. |
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 | Same SMB package, 15 V VWM, but rated for 600 W with tighter VBR tolerance (14.3–15.8 V vs. 14.3–15.8 V); identical RθJA and TJ range | No functional difference; SMBJ series uses same die but different branding and test screening-fully interchangeable in layout and circuit | Select SMBJ15CA if sourcing from distributors emphasizing the SMBJ family or requiring alternate part traceability |
| P6SMB15CA | Same electrical specs and SMB package; P6SMB is legacy naming for identical SM6T-series device-same Vishay datasheet (88385), same production line | No application difference; P6SMB15CA is obsolete nomenclature retained for cross-reference; functionally identical to SM6T15CA-E3/5B | Choose P6SMB15CA only for legacy BOM alignment; new designs should specify SM6T15CA-E3/5B per current Vishay documentation |
Compared with SMBJ15CA and P6SMB15CA, the SM6T15CA-E3/5B offers identical clamping performance and thermal behavior but carries updated RoHS-compliant (E3) and tape-and-reel (5B) packaging-ensuring compatibility with modern SMT lines and environmental compliance requirements without design change.
Availability
SM6T15CA-E3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, consumer USB port protection, and telecom line interface surge suppression requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for SM6T15CA-E3/5B 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 high-reliability, automotive-qualified, and AEC-Q101-compliant components.
The SM6T Series was developed specifically for robust, surface-mount transient suppression in space-constrained applications-targeting automotive electronics, industrial controls, and communications infrastructure where fast clamping, low inductance, and reflow compatibility are critical.
FAQ
What is the polarity configuration of SM6T15CA-E3/5B?
The SM6T15CA-E3/5B is a bidirectional TVS diode with symmetrical construction-neither terminal is marked as anode or cathode. It clamps voltage transients equally in both directions, making it ideal for AC-coupled or differential signal lines where polarity reversal may occur during surge events. This eliminates orientation concerns during PCB layout and assembly.
Does SM6T15CA-E3/5B meet automotive qualification standards?
The SM6T15CA-E3/5B itself is commercial-grade (E3 suffix), but the same die and package are offered in AEC-Q101-qualified versions under ordering codes SM6T15CAHE3_B/I or SM6T15CAHM3_B/I. These variants undergo additional stress testing per AEC-Q101 and are recommended for automotive applications requiring formal qualification evidence.
What is the maximum clamping voltage of SM6T15CA-E3/5B under surge conditions?
The SM6T15CA-E3/5B has a maximum clamping voltage (VC) of 21.2 V when subjected to a 10/1000 μs waveform at its rated peak pulse current of 28 A. This value is guaranteed per Vishay datasheet 88385 and defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
Can SM6T15CA-E3/5B be used in place of unidirectional TVS diodes like SM6T15A?
No-SM6T15CA-E3/5B is strictly bidirectional and cannot replace unidirectional types such as SM6T15A in DC-biased circuits. Unidirectional devices have a defined cathode band and conduct only in reverse bias; substituting SM6T15CA-E3/5B would allow forward conduction during normal operation, potentially disrupting circuit functionality or causing excessive leakage.
What PCB pad layout is recommended for optimal thermal performance of SM6T15CA-E3/5B?
Vishay specifies mounting SM6T15CA-E3/5B on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve the rated RθJA of 100 °C/W. Smaller pads increase thermal resistance and reduce surge current handling; thermal vias under pads further improve heat dissipation in high-reliability designs.
SM6T15CA-E3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, 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):
- 28A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMBJ)
SM6T15CA-E3/5B FAQ
1.How can I place an order for SM6T15CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T15CA-E3/5B 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 SM6T15CA-E3/5B reliable?
The price and inventory of SM6T15CA-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T15CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SM6T15CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T15CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T15CA-E3/5B?
SM6T15CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T15CA-E3/5B 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 SM6T15CA-E3/5B?
For technical support, including SM6T15CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T15CA-E3/5B requirements.
6.How does Aetrix verify that SM6T15CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SM6T15CA-E3/5B 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 SM6T15CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SM6T15CA-E3/5B?
All SM6T15CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SM6T15CA-E3/5B, 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 SM6T15CA-E3/5B part is unused and in its original packaging.
Return procedure for SM6T15CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T15CA-E3/5B Tags
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