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Vishay General Semiconductor - Diodes Division SM6T27AHE3_A/H
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- Part No.:
- SM6T27AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T27AHE3_A/H.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,354
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Product details
Overview
SM6T27AHE3_A/H 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 27 V breakdown voltage (VBR = 25.7–28.4 V), 37.5 V maximum clamping voltage at 16 A (10/1000 μs), 600 W peak pulse power, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SM6T27AHE3_A/H datasheet, SM6T27AHE3_A/H pinout, SM6T27AHE3_A/H application, or SM6T27AHE3_A/H equivalent, key selection criteria include unidirectional polarity, 23.1 V stand-off voltage (VWM), low clamping ratio (1.39), RoHS-compliant matte tin terminals, and MSL Level 1 reflow compatibility up to 260 °C.
Technical Context
This TVS diode operates as a fast-acting shunt protector with avalanche breakdown behavior, triggered when reverse voltage exceeds VBR. Its glass-passivated junction ensures stable leakage (<1 μA at 23.1 V) and robust surge handling under repetitive or single-pulse stress.
The device delivers consistent clamping performance across temperature (–65 °C to +150 °C) and supports high-reliability mounting on 5.0 mm × 5.0 mm copper pads. Thermal resistance is 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), enabling effective power dissipation during transient events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V - defines precise avalanche initiation range at 1 mA test current |
| VWM | 23.1 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA |
| VC @ IPPM | 37.5 V @ 16 A - clamps 10/1000 μs surges to safe levels for downstream ICs and MOSFETs |
| PPPM | 600 W - peak pulse power rating determines survivability against lightning or ESD-like transients |
| TJ max. | +150 °C - enables operation in under-hood automotive environments and industrial enclosures |
| AEC-Q101 | Qualified - validated for automotive electronics per stress-test requirements (HTOL, TCT, etc.) |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to ground or lower-potential node in unidirectional protection configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 24 V rail or sensor output); band-marked end |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 surges without derating |
| Glass passivated chip junction | Ensures stable VBR tolerance (±5 %), low leakage (<1 μA), and long-term reliability under thermal cycling |
| MSL Level 1, 260 °C peak reflow | Supports standard SMT assembly without pre-baking or special handling |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive powertrain, body control, and ADAS modules requiring zero-defect reliability |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply lines in vehicle ECUs from load-dump transients and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between battery rail and ground to clamp spikes above 23.1 V. Use Value: Limits voltage to ≤37.5 V during 16 A transients, preventing damage to MCU power inputs and CAN transceivers. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Reverse-biased TVS on sensor signal line to absorb ESD and switching noise from nearby solenoids. Use Value: Maintains signal integrity with <1 μA leakage at 23.1 V, ensuring sub-mV measurement accuracy remains unaffected. |
| Telecom DC Power Input Protection | Consumer USB-C Power Delivery Line |
Use Scenario: Guarding 48 V PoE injectors and splitters against induced surges from Ethernet cabling. IC Role / Device Role / Timing Role: Standoff-rated TVS on primary-side DC input, coordinated with upstream fuse and downstream DC-DC converter. Use Value: Withstands repeated 600 W pulses while maintaining 23.1 V hold-off-critical for UL 60950-1 compliance. | Use Scenario: Secondary-side overvoltage suppression on USB-C VBUS lines after buck converter regulation. IC Role / Device Role / Timing Role: Fast-response unidirectional clamp limiting fault voltage to 37.5 V during hot-plug or adapter mismatch events. Use Value: Low clamping ratio (1.39) prevents latch-up in USB PD controllers and protects Type-C CC logic pins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ27A | Same VBR range (25.7–28.4 V), but 400 W PPPM, SMA package (higher RθJA = 140 °C/W) | Limited to lower-energy transients; less suitable for automotive load dump | Choose SMAJ27A only if board space is constrained and surge energy is ≤400 W |
| 1.5SMC27A | Same VBR, 1500 W PPPM, larger SMC package (DO-214AB), higher IPPM = 39.1 A | Better for high-energy industrial surges; incompatible with SMB footprint | Select 1.5SMC27A when system-level testing requires >600 W margin and PCB layout allows larger pad area |
Compared with SMAJ27A and 1.5SMC27A, SM6T27AHE3_A/H provides optimal balance of AEC-Q101 qualification, 600 W capability, and SMB footprint-making it preferred for space-constrained automotive and industrial designs where reliability and reflow compatibility are critical.
Availability
SM6T27AHE3_A/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, telecom power supplies, and consumer USB-C PD systems requiring stable component supply and long-term lifecycle support.
Supply support for SM6T27AHE3_A/H 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, TVS devices, and optoelectronics with emphasis on reliability and automotive-grade validation.
The SM6T Series was developed specifically for high-reliability transient suppression in harsh environments, targeting AEC-Q101-compliant automotive subsystems and industrial equipment exposed to inductive switching and lightning-induced surges.
FAQ
What is the breakdown voltage tolerance for SM6T27AHE3_A/H?
The SM6T27AHE3_A/H has a specified breakdown voltage range of 25.7 V to 28.4 V at 1 mA test current, corresponding to ±5 % tolerance around the nominal 27 V rating. This tight VBR window ensures predictable clamping onset and compatibility with 24 V system designs where overvoltage margins are tightly controlled. The value is measured per JEDEC standards and confirmed in Vishay's official datasheet revision 09-Jan-2024.
Is SM6T27AHE3_A/H suitable for bidirectional transient protection?
No, SM6T27AHE3_A/H is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional operation, Vishay specifies the "CA" suffix (e.g., SM6T27CA). Using SM6T27AHE3_A/H in bidirectional applications would result in forward conduction during negative transients, potentially causing failure. Always verify polarity alignment in schematic and layout for SM6T27AHE3_A/H.
What does the "HE3" suffix signify in SM6T27AHE3_A/H?
"HE3" denotes RoHS-compliant construction with AEC-Q101 qualification, distinguishing it from commercial-grade "E3" variants. The "H" in the ordering code indicates 7" tape-and-reel packaging (750 units per reel), while "A/H" reflects the revision level per Vishay's internal coding. This makes SM6T27AHE3_A/H appropriate for automotive production and high-reliability industrial use where qualification and traceability are mandatory.
How does SM6T27AHE3_A/H perform under elevated ambient temperatures?
SM6T27AHE3_A/H is rated for operation from –65 °C to +150 °C junction temperature. Its peak pulse power derates linearly above 25 °C ambient per Figure 2 in the datasheet: at 85 °C ambient, PPPM reduces to ~420 W. Designers must apply thermal modeling using RθJA = 100 °C/W and ensure adequate copper pour to maintain TJ < 150 °C during surge events. SM6T27AHE3_A/H maintains full specification compliance across this range.
Can SM6T27AHE3_A/H replace SMAJ27A in an existing design?
SM6T27AHE3_A/H is not a direct drop-in replacement for SMAJ27A due to differing packages (SMB vs. SMA) and thermal characteristics-RθJA is 100 °C/W vs. 140 °C/W-and different AEC-Q101 qualification status. While both share identical VBR, substituting SM6T27AHE3_A/H requires PCB land pattern revision and revalidation of surge immunity. Use SM6T27AHE3_A/H only after confirming mechanical fit and thermal performance in the target application.
SM6T27AHE3_A/H 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/H FAQ
1.How can I place an order for SM6T27AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T27AHE3_A/H 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/H reliable?
The price and inventory of SM6T27AHE3_A/H 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/H is usually 5 days.
3.What payment methods are accepted for SM6T27AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T27AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T27AHE3_A/H?
SM6T27AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T27AHE3_A/H 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/H?
For technical support, including SM6T27AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T27AHE3_A/H requirements.
6.How does Aetrix verify that SM6T27AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SM6T27AHE3_A/H 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/H meets industry standards.
7.What is the process for return or replacement of SM6T27AHE3_A/H?
All SM6T27AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SM6T27AHE3_A/H, 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/H part is unused and in its original packaging.
Return procedure for SM6T27AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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