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Vishay General Semiconductor - Diodes Division SM6T27AHE3_A/I
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- Part No.:
- SM6T27AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T27AHE3_A/I.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,617
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Product details
Overview
SM6T27AHE3_A/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping inductive switching transients and ESD events. It features a 23.1 V stand-off voltage (VWM), 25.7–28.4 V breakdown range (VBR at 1 mA), 37.5 V max clamping voltage (VC) at 16.0 A peak pulse current, and 600 W peak pulse power (10/1000 μs). It is AEC-Q101 qualified and used to protect automotive sensor signal lines and MOSFET gate drivers.
For engineers reviewing the SM6T27AHE3_A/I datasheet, SM6T27AHE3_A/I pinout, SM6T27AHE3_A/I application, or SM6T27AHE3_A/I equivalent, key selection criteria include clamping performance under 10/1000 μs surge, unidirectional polarity with cathode band marking, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement on SMB footprint.
Technical Context
The SM6T27AHE3_A/I operates as a unidirectional silicon avalanche diode, leveraging glass-passivated junction technology for stable breakdown and low leakage (<1.0 μA at VWM). Its clamping response is optimized for fast-rising transients up to 600 W with minimal inductance due to SMB package geometry and internal leadframe design.
It is rated for operation from −65 °C to +150 °C junction temperature, derated above 25 °C per Fig. 2, and meets J-STD-020 MSL Level 1 with 260 °C reflow peak. The device is intended for PCB-level protection where low-profile mounting and high surge robustness are required without external biasing circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 23.1 V - maximum reverse working voltage before significant leakage; defines safe operating margin below breakdown |
| VBR (min/max) | 25.7 V / 28.4 V at 1.0 mA - guaranteed avalanche onset range; ensures predictable turn-on across production lot |
| VC @ IPPM | 37.5 V at 16.0 A (10/1000 μs) - peak clamped voltage during worst-case surge; determines protected IC's voltage stress limit |
| PPPM | 600 W - peak pulse power handling capability; validates suitability for ISO 7637-2 Pulse 1/2a/5a automotive transients |
| TJ max | +150 °C - maximum junction temperature; enables use in under-hood automotive environments with limited airflow |
| RθJA | 100 °C/W - thermal resistance junction-to-ambient; informs minimum copper pad area (0.2" × 0.2") needed for thermal reliability |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to system ground or low-side reference | Provides return path during clamping; must be routed with low-inductance trace to minimize voltage overshoot |
| Cathode | Current exit terminal in forward bias; marked by band; connected to protected line | Defines polarity-sensitive placement; reverse connection renders device non-functional for unidirectional suppression |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| 600 W peak pulse power (10/1000 μs) | Enables single-device protection against ISO 7637-2 Pulse 5a (load dump) in 12 V systems without parallel staging |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes overvoltage exposure to downstream ICs while maintaining margin above VWM for noise immunity |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without pre-baking or special handling protocols |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage under thermal/humidity stress; reduces parameter drift over life |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of engine coolant temperature sensors exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp transients before reaching ADC input. Use Value: Limits voltage excursion to ≤37.5 V during 16 A surges, preserving 12-bit ADC accuracy and preventing latch-up in microcontroller front-end. |
Use Scenario: Shielding 24 V digital input modules from relay coil flyback and field wiring ESD in factory automation cabinets. IC Role / Device Role / Timing Role: Standoff-clamp TVS on each input channel, referenced to common ground plane. Use Value: Absorbs 600 W pulses without degradation, enabling >100,000 actuation cycles while maintaining <1 μA leakage at 23.1 V nominal. |
| Power Supply Rail Clamping | MOSFET Gate Driver Protection |
Use Scenario: Secondary-side transient suppression on 5 V/3.3 V DC-DC converter outputs feeding sensitive logic rails. IC Role / Device Role / Timing Role: Fast-response clamping diode placed directly at point-of-load after LC filter. Use Value: Responds within nanoseconds to hold rail voltage below absolute maximum ratings of LDOs and FPGAs during board-level ESD events. |
Use Scenario: Gate-source protection of N-channel high-side MOSFETs in motor drive half-bridges subjected to Miller-induced spikes. IC Role / Device Role / Timing Role: Unidirectional TVS from gate to source, sized to clamp <10 ns spikes without affecting PWM timing. Use Value: Prevents gate oxide breakdown by limiting VGS to 37.5 V while adding <1 pF capacitance-negligible impact on 100 kHz switching. |
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 | Higher VWM (20.5 V), lower PPPM (400 W), same SMB package, non-AEC-Q101 | Limited to commercial-grade industrial use; insufficient for automotive load dump compliance | Select when cost sensitivity outweighs AEC-Q101 requirement and surge energy is ≤400 W |
| 1.5SMC27A | Same VWM/VBR specs, higher PPPM (1500 W), larger SMC (DO-214AB) package, AEC-Q101 available only in HE3 variant | Requires PCB layout change; suited for higher-energy transients beyond ISO 7637-2 scope | Choose when system-level testing reveals >600 W surge exposure or when thermal margin is constrained |
Compared with SMAJ24A and 1.5SMC27A, the SM6T27AHE3_A/I uniquely balances AEC-Q101 qualification, SMB footprint compatibility, and 600 W surge capacity-making it optimal for space-constrained automotive ECUs where qualification and form factor are non-negotiable.
Availability
SM6T27AHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and DC-DC converter secondary-side protection requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for SM6T27AHE3_A/I 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 and application-specific optimization.
The SM6T Series was developed for robust, surface-mount transient suppression in automotive and industrial environments-prioritizing AEC-Q101 compliance, low-profile packaging, and repeatable clamping performance under repetitive surge stress.
FAQ
What is the polarity configuration of SM6T27AHE3_A/I?
The SM6T27AHE3_A/I is a unidirectional transient voltage suppressor diode. Its cathode is marked by a visible band on the SMB package body, and the anode is the unmarked end. This polarity must be observed during PCB layout to ensure proper clamping action-reverse orientation will prevent conduction during positive transients on the protected line.
Does SM6T27AHE3_A/I meet automotive qualification standards?
Yes, the SM6T27AHE3_A/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in datasheet 88385. It has passed stress tests including temperature cycling, high-temperature reverse bias (HTRB), and ESD per AEC-Q101 Rev D, making it suitable for under-hood and body-control module applications.
What is the maximum clamping voltage of SM6T27AHE3_A/I under surge conditions?
The SM6T27AHE3_A/I exhibits a maximum clamping voltage (VC) of 37.5 V when subjected to a 10/1000 μs waveform peak pulse current (IPPM) of 16.0 A. This value is measured per Figure 1 in the official Vishay datasheet and defines the upper voltage limit imposed on protected circuitry during standardized surge events.
Can SM6T27AHE3_A/I be used in bidirectional configurations?
No, SM6T27AHE3_A/I is strictly unidirectional. For bidirectional transient suppression, Vishay specifies devices with the "CA" suffix (e.g., SM6T27CA). Using SM6T27AHE3_A/I in reverse-biased mode does not provide symmetrical clamping and may result in failure under negative-going transients.
What is the thermal resistance and recommended pad layout for SM6T27AHE3_A/I?
The SM6T27AHE3_A/I 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. The datasheet specifies this pad size as the minimum for rated power dissipation; reducing pad area increases thermal impedance and risks exceeding TJ max of +150 °C.
SM6T27AHE3_A/I 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:
- Obsolete
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SM6T27AHE3_A/I FAQ
1.How can I place an order for SM6T27AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T27AHE3_A/I 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 SM6T27AHE3_A/I reliable?
The price and inventory of SM6T27AHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T27AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SM6T27AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T27AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T27AHE3_A/I?
SM6T27AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T27AHE3_A/I 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 SM6T27AHE3_A/I?
For technical support, including SM6T27AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T27AHE3_A/I requirements.
6.How does Aetrix verify that SM6T27AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SM6T27AHE3_A/I 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 SM6T27AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SM6T27AHE3_A/I?
All SM6T27AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T27AHE3_A/I, 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 SM6T27AHE3_A/I part is unused and in its original packaging.
Return procedure for SM6T27AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T27AHE3_A/I Tags
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