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Vishay General Semiconductor - Diodes Division SM6T27A-E3/52
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- Part No.:
- SM6T27A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T27A-E3/52.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,029
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Product details
Overview
SM6T27A-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, with 27 V breakdown voltage (VBR = 25.7–28.4 V at 1.0 mA), 23.1 V stand-off voltage (VWM), and 37.5 V maximum clamping voltage (VC) at 16.0 A peak pulse current - designed to protect MOSFETs, ICs, and sensor signal lines against inductive switching transients in automotive and industrial power electronics.
For engineers reviewing the SM6T27A-E3/52 datasheet, SM6T27A-E3/52 pinout, SM6T27A-E3/52 application, or SM6T27A-E3/52 equivalent, key selection criteria include clamping performance under 10/1000 μs surge, unidirectional polarity marking, RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
The SM6T27A-E3/52 operates as a unidirectional avalanche diode with glass-passivated junction, delivering 600 W peak pulse power (10/1000 μs waveform) and low clamping ratio (VC/VBR ≈ 1.39). Its thermal resistance (RθJA = 100 °C/W) and 150 °C max junction temperature support sustained operation in compact PCB layouts.
Designed for transient suppression in DC power rails and low-speed signal paths, it features low inductance and meets MSL Level 1 (260 °C reflow peak), enabling robust reliability in automotive-grade commercial applications without requiring AEC-Q101 qualification (HE3/HM3 suffix variants required for that).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V at 1.0 mA - defines precise avalanche initiation threshold for predictable overvoltage triggering |
| VWM | 23.1 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 37.5 V at 16.0 A (10/1000 μs) - clamping voltage limiting downstream component stress during surge events |
| PPPM | 600 W - peak transient energy absorption capability under standardized surge waveform |
| RθJA | 100 °C/W - thermal resistance from junction to ambient, critical for derating above 25 °C ambient |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with cathode band marking and 0.2" × 0.2" pad requirement |
| Polarity | Unidirectional - cathode marked by band; blocks forward conduction, clamps reverse transients only |
Pinout & Package
SMB (DO-214AA) package: molded plastic case with matte tin-plated leads, 0.220" × 0.130" footprint, 0.086" height, and cathode band marking on one end. Complies with UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected circuit; conducts during forward-biased surges (e.g., ESD in certain configurations) |
| Cathode | Avalanche clamping terminal | Marked by band; connected to higher-potential rail (e.g., VCC or signal line) to clamp reverse transients to VC |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables protection against high-energy load dump and inductive kick events in 12 V/24 V systems |
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| Low inductance construction | Minimizes voltage overshoot during fast-rising transients (e.g., <10 ns rise time), improving clamping fidelity |
| MSL Level 1 (260 °C peak) | Supports single-reflow assembly without moisture-related popcorn failure or delamination |
| RoHS-compliant, commercial grade (E3 suffix) | Meets global environmental compliance requirements while maintaining cost-effective supply chain availability |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Suppressing load-dump transients (up to 40 V, 100 ms) on 12 V battery-fed ECUs and body control modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and ground to clamp overvoltage before reaching LDOs and microcontrollers. Use Value: Limits peak rail voltage to ≤37.5 V during ISO 7637-2 Pulse 5a, preventing latch-up or permanent damage to downstream silicon. | Use Scenario: Protecting analog output lines (e.g., 4–20 mA current loops) from ESD and cable discharge events in factory automation sensors. IC Role / Device Role / Timing Role: TVS mounted across signal and return path near connector to shunt fast transients before reaching op-amp input stages. Use Value: Clamps 8 kV contact ESD (IEC 61000-4-2) to <40 V within nanoseconds, preserving signal integrity and ADC accuracy. |
| Consumer Power Adapter Input Protection | Telecom DC Power Feeding Protection |
Use Scenario: Safeguarding AC/DC adapter primary-side controllers from surge coupling via mains input during lightning-induced grid disturbances. IC Role / Device Role / Timing Role: Unidirectional TVS placed across bulk capacitor terminals to absorb differential-mode surges before rectifier and controller IC. Use Value: Absorbs 600 W peak energy per event without degradation, extending adapter lifetime in regions with unstable utility power. | Use Scenario: Shielding PoE-powered devices (e.g., IP cameras) from induced surges on 48 V DC feeding lines due to nearby lightning strikes. IC Role / Device Role / Timing Role: TVS installed at PD (Powered Device) input to clamp common-mode surges between power pair and ground. Use Value: Maintains <37.5 V clamping under 16 A 10/1000 μs surge, ensuring IEEE 802.3af/at compliance and uninterrupted operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A | Lower PPPM (400 W), same SMB package, VBR = 26.7–29.5 V, VC = 38.9 V @ 10.3 A | Reduced surge margin; suitable only where peak currents remain below 10.3 A | Select SMAJ24A only when system-level testing confirms 400 W rating suffices and layout allows tighter thermal management. |
| SMCJ24A | Higher PPPM (1500 W), larger SMC (DO-214AB) package, VBR = 26.7–29.5 V, VC = 39.4 V @ 38.0 A | Requires PCB area increase (~2.5× footprint); better for high-reliability industrial environments | Choose SMCJ24A when surge threat level exceeds 600 W or when extended lifetime under repeated transients is mandatory. |
Compared with SM6T27A-E3/52, SMAJ24A offers lower cost and same form factor but reduced surge handling, while SMCJ24A delivers superior robustness at the expense of board space and thermal design complexity - making SM6T27A-E3/52 the optimal balance for space-constrained 12–24 V systems needing proven 600 W protection.
Availability
SM6T27A-E3/52 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface design, and consumer power adapter development requiring stable component supply and full traceability.
Supply support for SM6T27A-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 passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SM6T Series is engineered for robust transient suppression in harsh electrical environments - targeting cost-sensitive yet reliability-critical applications in automotive, industrial, and telecom infrastructure where consistent clamping performance and SMT manufacturability are essential.
FAQ
What is the breakdown voltage tolerance for SM6T27A-E3/52?
The SM6T27A-E3/52 has a specified breakdown voltage range of 25.7 V to 28.4 V at 1.0 mA test current, corresponding to ±10% tolerance around the nominal 27 V rating. This tight VBR window ensures consistent turn-on behavior across production lots and supports reliable coordination with downstream overvoltage protection thresholds in designs using SM6T27A-E3/52.
Is SM6T27A-E3/52 suitable for automotive applications requiring AEC-Q101 qualification?
No, SM6T27A-E3/52 is RoHS-compliant commercial-grade only. For AEC-Q101 qualified versions, select the HE3 or HM3 suffix variants (e.g., SM6T27AHE3_A), which undergo additional stress testing and lot traceability. SM6T27A-E3/52 remains appropriate for non-safety-critical automotive subsystems where qualification is not mandated by OEM specifications.
What is the maximum clamping voltage of SM6T27A-E3/52 under a 10/1000 μs surge?
The SM6T27A-E3/52 exhibits a maximum clamping voltage (VC) of 37.5 V when subjected to its rated 16.0 A peak pulse current under the standard 10/1000 μs waveform. This value is guaranteed per datasheet Figure 1 and Table on page 2, and represents the upper limit of voltage seen by protected circuitry during worst-case transient events.
Does SM6T27A-E3/52 have bidirectional capability?
No, SM6T27A-E3/52 is strictly unidirectional. Bidirectional variants use the "CA" suffix (e.g., SM6T27CA). The cathode band marking on SM6T27A-E3/52 confirms polarity, and its electrical characteristics - including forward surge rating (IFSM = 100 A) - apply only in the reverse-clamping direction; forward conduction is not intended for transient suppression.
What PCB pad layout is recommended for optimal thermal performance of SM6T27A-E3/52?
Vishay specifies mounting SM6T27A-E3/52 on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated 600 W pulse power and proper thermal dissipation. Smaller pads reduce heat spreading, causing premature thermal derating; the datasheet's Figure 2 shows >20% power reduction at TA = 75 °C when using minimum pad sizes instead of recommended ones.
SM6T27A-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):
- 23.1V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- Current - Peak Pulse (10/1000µs):
- 16A
- 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)
SM6T27A-E3/52 FAQ
1.How can I place an order for SM6T27A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T27A-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 SM6T27A-E3/52 reliable?
The price and inventory of SM6T27A-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 SM6T27A-E3/52 is usually 5 days.
3.What payment methods are accepted for SM6T27A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T27A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T27A-E3/52?
SM6T27A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T27A-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 SM6T27A-E3/52?
For technical support, including SM6T27A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T27A-E3/52 requirements.
6.How does Aetrix verify that SM6T27A-E3/52 is sourced from the original manufacturer or authorized distributors?
All SM6T27A-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 SM6T27A-E3/52 meets industry standards.
7.What is the process for return or replacement of SM6T27A-E3/52?
All SM6T27A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SM6T27A-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 SM6T27A-E3/52 part is unused and in its original packaging.
Return procedure for SM6T27A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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