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Vishay General Semiconductor - Diodes Division SM6T15A-E3/52
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- Part No.:
- SM6T15A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T15A-E3/52.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:1,046
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Product details
Overview
SM6T15A-E3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features 15 V breakdown voltage (VBR = 14.3–15.8 V at 1.0 mA), 21.2 V maximum clamping voltage (VC) at 28.0 A peak pulse current, 600 W peak pulse power (10/1000 μs), and 1.0 μA max reverse leakage at 12.8 V stand-off voltage - deployed in automotive sensor protection and industrial I/O interface circuits.
For engineers reviewing the SM6T15A-E3/52 datasheet, SM6T15A-E3/52 pinout, SM6T15A-E3/52 application, or SM6T15A-E3/52 equivalent, key selection criteria include unidirectional polarity, SMB thermal resistance (RθJA = 100 °C/W), AEC-Q101 qualification eligibility (via HE3 suffix), low-inductance clamping response, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
The SM6T15A-E3/52 operates as a unidirectional avalanche diode, triggering conduction when reverse voltage exceeds its 14.3–15.8 V breakdown range. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1.0 μA at VWM = 12.8 V), while low parasitic inductance enables fast response to ESD and load-switching transients.
Thermally, it sustains 150 °C max junction temperature with 5.0 W steady-state power dissipation on infinite heatsink at 50 °C ambient. Derating follows Fig. 2 of the datasheet, and its MSL Level 1 rating supports lead-free reflow up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 14.3 V / 15.8 V at 1.0 mA - defines precise clamping onset threshold for overvoltage events |
| VWM | 12.8 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | 21.2 V at 28.0 A (10/1000 μs) - actual clamped voltage seen by protected circuit during surge |
| PPPM | 600 W - peak transient energy absorption capability under standardized surge waveform |
| IFSM | 100 A - surge current handling for 10 ms half-sine wave, critical for inductive load switching |
| RθJA | 100 °C/W - thermal resistance from junction to ambient, determines derating in PCB layout |
| TJ max | +150 °C - maximum allowable junction temperature, sets upper limit for thermal design margin |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, matte tin-plated leads, RoHS-compliant (E3 suffix), MSL Level 1, UL 94 V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased anode connection point | Connected to protected line; conducts during overvoltage to shunt current to ground |
| Anode | Reference/ground return path | Typically tied to system ground or low-impedance return plane for effective clamping |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges in automotive and industrial environments |
| Glass passivated chip junction | Ensures long-term stability of VBR and low leakage drift over temperature and lifetime |
| Low inductance construction | Minimizes voltage overshoot during fast transients (e.g., ESD > 30 kV), improving clamping fidelity |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture-related popcorning or delamination |
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 jump-start transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp spikes before they reach sensitive input stages. Use Value: Limits voltage to ≤21.2 V during 28 A transients, preventing damage to 3.3 V/5 V interface ICs and preserving signal integrity. | Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to inductive kickback from solenoids and relays. IC Role / Device Role / Timing Role: Standoff-rated TVS on 24 V DC input lines, absorbing repetitive 600 W surges without degradation. Use Value: Maintains <1.0 μA leakage at 12.8 V, ensuring reliable high-impedance sensing while surviving >1000 surge events per IEC 61000-4-5. |
| Consumer Power Adapter Input | Telecom Line Interface Protection |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters subjected to lightning-induced surges on DC output rails. IC Role / Device Role / Timing Role: Unidirectional clamping device across +VOUT and GND, triggered only during abnormal positive excursions. Use Value: Clamps to 21.2 V within nanoseconds, protecting downstream DC-DC converters rated for 24 V max input. | Use Scenario: Protecting Ethernet PHY or RS-485 transceivers from induced surges on twisted-pair data lines in building automation networks. IC Role / Device Role / Timing Role: Point-of-entry TVS on differential pair, leveraging low capacitance and fast response to avoid signal distortion. Use Value: Delivers 600 W surge handling with minimal impact on 100 Mbps signal rise time due to low junction inductance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A | Same SMB package, 15 V VBR, but lower PPPM = 400 W and higher VC = 24.4 V at 24.5 A | Limited to less severe surge environments (e.g., consumer-grade rather than automotive) | Select SMAJ15A only if 400 W rating suffices and board space constraints match SMB footprint |
| SMCJ15A | Larger SMC (DO-214AB) package, same 15 V VBR, higher PPPM = 1500 W, VC = 24.4 V at 61.5 A | Requires larger PCB pad area and higher thermal mass; suited for primary-side or high-energy rail protection | Choose SMCJ15A when surge energy exceeds 600 W or when higher IPPM headroom is required |
Compared with SMAJ15A and SMCJ15A, the SM6T15A-E3/52 delivers optimal balance of 600 W surge capacity, compact SMB footprint, and 21.2 V clamping voltage - making it preferred for space-constrained automotive and industrial control applications where both size and performance are critical.
Availability
SM6T15A-E3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply, RoHS compliance, and traceable sourcing.
Supply support for SM6T15A-E3/52 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, automotive qualification, and high-volume manufacturability.
The SM6T Series is engineered for robust transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where AEC-Q101 qualification, low clamping voltage, and automated assembly compatibility are essential design requirements.
FAQ
What is the breakdown voltage tolerance of SM6T15A-E3/52?
The SM6T15A-E3/52 has a specified breakdown voltage range of 14.3 V to 15.8 V at 1.0 mA test current, corresponding to ±10% tolerance around the nominal 15 V rating. This tight VBR window ensures predictable clamping behavior across production lots and temperature ranges, critical for consistent protection in automotive and industrial designs where margin is constrained.
Is SM6T15A-E3/52 qualified for automotive use?
The SM6T15A-E3/52 itself is RoHS-compliant commercial-grade; however, the SM6T15AHE3 variant (with HE3 suffix) is explicitly AEC-Q101 qualified. Engineers requiring automotive qualification must specify the HE3 version - the E3/52 suffix alone does not confer AEC-Q101 status, though the underlying die and construction support that qualification path.
What is the maximum clamping voltage of SM6T15A-E3/52 under surge conditions?
The SM6T15A-E3/52 exhibits a maximum clamping voltage (VC) of 21.2 V when subjected to a 10/1000 μs waveform with a peak pulse current (IPPM) of 28.0 A. This value is measured per Figure 1 in the datasheet and represents the worst-case voltage imposed on the protected circuit during standardized surge testing.
Can SM6T15A-E3/52 be used in bidirectional configurations?
No - SM6T15A-E3/52 is a unidirectional TVS diode, identified by its single cathode band marking. For bidirectional operation, Vishay specifies the CA-suffixed variant (e.g., SM6T15CA). Using SM6T15A-E3/52 in reverse-biased AC applications would result in forward conduction and failure; always verify polarity alignment in schematic and layout.
What is the thermal resistance and how does it affect layout for SM6T15A-E3/52?
The SM6T15A-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads. To maintain safe junction temperatures, PCB layout must provide adequate copper area and minimize thermal isolation - undersized pads or thin traces will increase RθJA and risk thermal runaway during sustained surge events.
SM6T15A-E3/52 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:
- 1
- Bidirectional Channels:
- -
- 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)
SM6T15A-E3/52 FAQ
1.How can I place an order for SM6T15A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T15A-E3/52 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 SM6T15A-E3/52 reliable?
The price and inventory of SM6T15A-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T15A-E3/52 is usually 5 days.
3.What payment methods are accepted for SM6T15A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T15A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T15A-E3/52?
SM6T15A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T15A-E3/52 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 SM6T15A-E3/52?
For technical support, including SM6T15A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T15A-E3/52 requirements.
6.How does Aetrix verify that SM6T15A-E3/52 is sourced from the original manufacturer or authorized distributors?
All SM6T15A-E3/52 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 SM6T15A-E3/52 meets industry standards.
7.What is the process for return or replacement of SM6T15A-E3/52?
All SM6T15A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SM6T15A-E3/52, 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 SM6T15A-E3/52 part is unused and in its original packaging.
Return procedure for SM6T15A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T15A-E3/52 Tags
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