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Vishay General Semiconductor - Diodes Division SM6T12A-E3/52
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- Part No.:
- SM6T12A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T12A-E3/52.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,148
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Product details
Overview
SM6T12A-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 12 V breakdown voltage (VBR = 11.4–12.6 V at 1.0 mA), 16.7 V maximum clamping voltage (VC) at 36.0 A peak pulse current, and 600 W peak pulse power capability with 10/1000 μs waveform - deployed in automotive sensor protection and industrial I/O interface circuits.
For engineers reviewing the SM6T12A-E3/52 datasheet, SM6T12A-E3/52 pinout, SM6T12A-E3/52 application, or SM6T12A-E3/52 equivalent, key selection criteria include unidirectional polarity, 10.2 V stand-off voltage (VWM), 5.0 μA max reverse leakage at VWM, RoHS-compliant E3 suffix, and AEC-Q101 qualification eligibility via HE3 variant.
Technical Context
This TVS diode operates as a fast-acting shunt clamp during overvoltage events, leveraging a glass-passivated silicon junction to achieve low dynamic impedance and excellent clamping ratio (VC/VBR ≈ 1.39). Its 100 °C/W junction-to-ambient thermal resistance and 150 °C maximum junction temperature support reliable operation under repetitive surge conditions when mounted on 5.0 mm × 5.0 mm copper pads.
The device complies with JEDEC J-STD-020 MSL Level 1 (260 °C peak reflow), uses matte tin-plated leads solderable per J-STD-002, and meets JESD201 Class 2 whisker resistance. Unidirectional configuration enables integration into DC-biased rails where polarity-aware protection is required - distinct from bidirectional CA-suffix variants used in AC or floating-line applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 11.4 V / 12.6 V at 1.0 mA - defines precise breakdown onset for predictable clamping threshold |
| VWM | 10.2 V - maximum continuous reverse operating voltage before leakage exceeds 5.0 μA |
| VC @ IPPM | 16.7 V at 36.0 A (10/1000 μs) - clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 600 W - peak transient power handling capacity under standardized 10/1000 μs waveform |
| RθJA | 100 °C/W - thermal resistance limiting junction temperature rise under sustained power dissipation |
| TJ max | +150 °C - maximum allowable junction temperature for long-term reliability in harsh environments |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads; cathode indicated by band marking on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to lower-potential side of protected line | Provides reference point for unidirectional clamping - must be tied to ground or return path in DC systems |
| Cathode | Current exit terminal in forward bias; marked with band; connected to higher-potential side | Defines clamping polarity - voltage between cathode and anode is suppressed above VBR during transients |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust suppression of ISO 7637-2 Pulse 1/2a/5a surges without degradation in automotive ECUs |
| Glass passivated chip junction | Ensures stable VBR tolerance and low leakage (<5 μA) across temperature and lifetime |
| MSL Level 1 moisture sensitivity | Allows direct placement into high-volume SMT lines without baking or special handling |
| AEC-Q101 qualification path | Supports automotive-grade sourcing via HE3/HM3 variants - critical for ADAS and body control modules |
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 inductive switching transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Shunt-clamp TVS placed directly at connector or IC input pin to divert surge energy before reaching sensitive front-end circuitry. Use Value: Limits transient voltage to ≤16.7 V, preventing latch-up or gate oxide damage in microcontrollers and transceivers rated for 18 V absolute max. | Use Scenario: Safeguarding digital input channels of programmable logic controllers against field-wiring induced surges (IEC 61000-4-5 Level 3). IC Role / Device Role / Timing Role: Standoff-rated protector on 24 V DC input lines, activated only during >10.2 V overvoltage events to preserve normal signal integrity. Use Value: Maintains <5.0 μA leakage at 10.2 V, avoiding false triggering or loading of high-impedance optocoupler or comparator inputs. |
| Consumer Power Adapter Input | Telecom Line Interface Protection |
Use Scenario: Secondary-side transient suppression on 5–12 V DC outputs of wall adapters exposed to mains-coupled noise and ESD. IC Role / Device Role / Timing Role: Fast-response clamp (tR < 1 ns) placed after rectification but before LDO regulators to prevent output rail collapse. Use Value: Delivers 600 W pulse handling without derating up to +85 °C ambient, ensuring compliance with UL 62368-1 surge immunity requirements. | Use Scenario: Protection of Ethernet PHY or RS-485 transceiver pins against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS on differential pairs, coordinated with common-mode chokes to meet IEC 61000-4-5 4 kV/2 Ω test profiles. Use Value: Low 20 °C/W junction-to-lead thermal resistance allows efficient heat transfer to PCB copper, sustaining repeated 8/20 μs surges up to 21.7 A. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A | Same SMB package, 12 V VBR, but lower PPPM = 400 W and higher VC = 19.9 V at 20 A | Limited to less severe surge environments (e.g., consumer USB ports vs. automotive battery lines) | Select SMAJ12A only if system-level testing confirms 400 W rating suffices and 19.9 V clamping is acceptable |
| 1.5SMC12A | Higher PPPM = 1500 W, larger SMC (DO-214AB) package, same VBR/VC specs | Requires PCB layout change; suited for primary-side AC/DC input protection where space permits | Choose 1.5SMC12A when surge energy exceeds 600 W or when board real estate allows larger footprint |
Compared with SMAJ12A and 1.5SMC12A, SM6T12A-E3/52 delivers optimal balance of 600 W surge capacity, SMB footprint compatibility, and 16.7 V clamping - making it preferred for space-constrained automotive and industrial modules requiring AEC-Q101 readiness and RoHS compliance.
Availability
SM6T12A-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, full traceability, and consistent RoHS-compliant manufacturing.
Supply support for SM6T12A-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, precision, and automotive-grade qualification.
The SM6T Series is engineered specifically for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where consistent clamping performance and AEC-Q101 readiness are mandatory.
FAQ
What is the breakdown voltage range for SM6T12A-E3/52?
The SM6T12A-E3/52 has a guaranteed breakdown voltage (VBR) range of 11.4 V to 12.6 V at a test current of 1.0 mA, measured per JEDEC standards. This tight tolerance ensures predictable clamping behavior in designs where precise overvoltage thresholds are critical. The SM6T12A-E3/52 achieves this specification using a glass-passivated silicon junction, contributing to long-term stability and low leakage.
Is SM6T12A-E3/52 RoHS-compliant and halogen-free?
Yes, SM6T12A-E3/52 carries the "E3" suffix, indicating full RoHS compliance per EU Directive 2011/65/EU and exemption 7a. It is not halogen-free; for halogen-free versions, select the "M3" suffix variant (e.g., SM6T12A-M3/52). Both E3 and M3 meet JESD201 Class 2 whisker resistance and J-STD-002 solderability requirements. The SM6T12A-E3/52 is supplied in 7" tape-and-reel packaging (750 units per reel).
What is the maximum clamping voltage of SM6T12A-E3/52 under surge conditions?
The SM6T12A-E3/52 exhibits a maximum clamping voltage (VC) of 16.7 V when subjected to a 10/1000 μs waveform at its rated peak pulse current of 36.0 A. This value is measured under standardized test conditions with 0.2" × 0.2" copper pads per terminal. The SM6T12A-E3/52 maintains this clamping performance across its operating temperature range, supporting robust protection in thermally demanding applications.
Can SM6T12A-E3/52 be used in automotive applications?
Yes - while the base SM6T12A-E3/52 is commercial-grade, it belongs to the AEC-Q101-qualified SM6T family. Automotive-grade variants use the "HE3" or "HM3" suffix (e.g., SM6T12AHE3_A). These undergo additional stress testing including temperature cycling, HTRB, and ESD. For non-safety-critical automotive subsystems like body electronics or infotainment, SM6T12A-E3/52 may be used pending internal validation; however, certified designs require the HE3/HM3 version. The SM6T12A-E3/52 shares identical electrical specs with its automotive counterparts.
What is the thermal resistance of SM6T12A-E3/52 and how does it affect layout?
The SM6T12A-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 per terminal. To maintain safe junction temperatures during repetitive surges, PCB layout must adhere to the recommended pad dimensions and avoid excessive trace length or isolation. Increasing copper area reduces RθJA; the SM6T12A-E3/52's RθJL of 20 °C/W further emphasizes the importance of thermal connection to PCB ground planes.
SM6T12A-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):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 36A
- 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)
SM6T12A-E3/52 FAQ
1.How can I place an order for SM6T12A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T12A-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 SM6T12A-E3/52 reliable?
The price and inventory of SM6T12A-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 SM6T12A-E3/52 is usually 5 days.
3.What payment methods are accepted for SM6T12A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T12A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T12A-E3/52?
SM6T12A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T12A-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 SM6T12A-E3/52?
For technical support, including SM6T12A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T12A-E3/52 requirements.
6.How does Aetrix verify that SM6T12A-E3/52 is sourced from the original manufacturer or authorized distributors?
All SM6T12A-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 SM6T12A-E3/52 meets industry standards.
7.What is the process for return or replacement of SM6T12A-E3/52?
All SM6T12A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SM6T12A-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 SM6T12A-E3/52 part is unused and in its original packaging.
Return procedure for SM6T12A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T12A-E3/52 Tags
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