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Vishay General Semiconductor - Diodes Division SM6T27AHE3_B/H
- Part No.:
- SM6T27AHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T27AHE3_B/H.pdf
- Description:
- 600W,27V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,183
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Product details
Overview
SM6T27AHE3_B/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, with 27 V breakdown voltage (VBR = 25.7–28.4 V at 1 mA), 23.1 V stand-off voltage (VWM), 37.5 V clamping voltage (VC) at 16 A peak pulse current, and 600 W peak pulse power rating per 10/1000 μs waveform - deployed for overvoltage protection of automotive sensor signal lines, MOSFET gate drivers, and industrial I/O interfaces.
For engineers reviewing the SM6T27AHE3_B/H datasheet, SM6T27AHE3_B/H pinout, SM6T27AHE3_B/H application, or SM6T27AHE3_B/H equivalent, key selection criteria include its AEC-Q101 qualification, low clamping ratio (VC/VBR ≈ 1.35), 1.0 μA max reverse leakage at VWM, SMB thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: under normal bias it presents high impedance (<1.0 μA leakage at 23.1 V), but triggers avalanche conduction when transients exceed VBR, limiting downstream voltage to ≤37.5 V at 16 A (10/1000 μs). Its glass-passivated junction ensures stable breakdown and low inductance for fast response.
Designed for automotive-grade reliability, SM6T27AHE3_B/H meets AEC-Q101 stress tests and MSL Level 1 (260 °C reflow), with operating junction temperature range of –65 °C to +150 °C and thermal resistance RθJL = 20 °C/W to lead - enabling robust surge handling in engine control units and ADAS sensor modules without external heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V at 1.0 mA - defines precise avalanche onset window for repeatable clamping behavior |
| VWM | 23.1 V - maximum continuous reverse voltage before significant leakage; sets safe operating margin below VBR |
| VC @ IPPM | 37.5 V at 16.0 A (10/1000 μs) - actual clamped voltage seen by protected IC during worst-case surge |
| PPPM | 600 W - peak transient energy absorption capability under standardized lightning/surge waveform |
| IFSM | 100 A - single half-sine surge rating (10 ms), critical for inductive load switching protection |
| TJ max | +150 °C - enables operation in under-hood automotive environments without derating |
| RθJA | 100 °C/W - thermal performance on standard 5.0 mm × 5.0 mm PCB copper pads; guides layout cooling design |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002; cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (unidirectional) | Connected to system ground or lower-potential rail; completes conduction path during reverse transient |
| Cathode | Avalanche conduction terminal | Connected to protected line (e.g., sensor output); clamps voltage by shunting surge to ground via anode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements - supports PPAP and long-term reliability in ECU designs |
| 600 W peak pulse power | Withstands ISO 7637-2 Pulse 1/2a/5a surges and IEC 61000-4-5 Level 4 transients without degradation |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes voltage overshoot on protected node - preserves margin for 3.3 V/5 V/12 V logic and analog circuits |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles - no pre-baking required for SMT assembly |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between signal line and chassis ground to clamp transients before they reach sensitive input stages. Use Value: Maintains signal integrity under ISO 16750-2 load dump (12 V systems up to 35 V) and prevents latch-up in 5 V sensor interface ICs. | Use Scenario: Safeguarding PLC digital input modules against field-wiring induced surges from solenoid valves and motor contactors. IC Role / Device Role / Timing Role: Standoff voltage (23.1 V) matches 24 V DC industrial supply rails; clamps transients to 37.5 V to protect optocoupler inputs and microcontroller GPIOs. Use Value: Eliminates need for discrete RC snubbers while meeting IEC 61000-4-4 EFT and IEC 61000-4-5 surge immunity requirements. |
| MOSFET Gate Driver Protection | Consumer Power Adapter Output |
Use Scenario: Shielding high-side N-channel MOSFET gates in automotive LED drivers and BLDC motor controllers from Miller-induced voltage spikes. IC Role / Device Role / Timing Role: Placed between gate and source to clamp dv/dt-induced overshoot during fast switching transitions. Use Value: Prevents gate oxide breakdown with sub-10 ns response time and <1.0 μA leakage at 23.1 V - no impact on driver efficiency. | Use Scenario: Secondary-side overvoltage suppression in USB PD and QC-compliant AC/DC adapters to meet UL 1449 and IEC 62368-1 safety standards. IC Role / Device Role / Timing Role: Unidirectional TVS across output capacitor to absorb flyback energy from transformer leakage inductance. Use Value: Limits output voltage excursion to 37.5 V during no-load or short-circuit fault conditions - protects connected devices and satisfies regulatory clamping limits. |
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), higher VC/VBR ratio (≈1.43), same SMB package | Not AEC-Q101 qualified; suitable for commercial-grade power supplies but not automotive ECUs | Select SMAJ24A only for cost-sensitive non-automotive designs where 400 W surge rating suffices |
| SMCJ24A | Higher PPPM (1500 W), larger SMC (DO-214AB) package, same VBR range | Requires larger PCB footprint and different pad layout; used where higher surge margin is mandatory (e.g., telecom base stations) | Choose SMCJ24A when system-level surge testing exceeds 600 W or when longer transient duration (e.g., 8/20 μs) dominates |
Compared with SMAJ24A and SMCJ24A, SM6T27AHE3_B/H delivers optimal balance of AEC-Q101 compliance, 600 W surge capacity, and SMB footprint - making it the preferred choice for space-constrained automotive and industrial modules requiring validated reliability and precise clamping.
Availability
SM6T27AHE3_B/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O interface hardening, and MOSFET gate driver safeguarding requiring stable component supply across production lifecycles.
Supply support for SM6T27AHE3_B/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, MOSFETs, and protection devices with emphasis on reliability, precision, and automotive qualification.
The SM6T Series is designed specifically for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 validation, low clamping voltage, and consistent surge performance are mandatory.
FAQ
What is the exact breakdown voltage range for SM6T27AHE3_B/H?
The SM6T27AHE3_B/H has a guaranteed breakdown voltage (VBR) range of 25.7 V to 28.4 V at 1.0 mA test current, measured per JEDEC standards. This tight tolerance ensures predictable clamping behavior in automotive and industrial circuits where voltage margins are constrained. The value is confirmed in Vishay's official datasheet revision 09-Jan-2024, Document Number 88385.
Is SM6T27AHE3_B/H AEC-Q101 qualified?
Yes, SM6T27AHE3_B/H is explicitly AEC-Q101 qualified, as indicated by the "HE3" suffix and confirmed in the Vishay SM6T Series datasheet. It undergoes full stress testing including temperature cycling, HTRB, and ESD per AEC-Q101 Rev D, making it suitable for automotive powertrain and body electronics applications.
What is the clamping voltage of SM6T27AHE3_B/H at rated peak pulse current?
The SM6T27AHE3_B/H clamps to a maximum of 37.5 V at 16.0 A peak pulse current (10/1000 μs waveform), as specified in the Electrical Characteristics table. This value defines the upper voltage limit imposed on protected circuitry during surge events and is critical for ensuring compatibility with 24 V system interfaces.
Does SM6T27AHE3_B/H have bidirectional capability?
No, SM6T27AHE3_B/H is a unidirectional TVS diode, as confirmed by its part number structure (no "CA" suffix) and polarity marking (cathode band). Bidirectional variants require the "CA" suffix (e.g., SM6T27CA); using SM6T27AHE3_B/H in AC-coupled or bipolar signal paths would result in forward conduction during negative half-cycles.
What is the thermal resistance junction-to-ambient for SM6T27AHE3_B/H?
The typical thermal resistance junction-to-ambient (RθJA) for SM6T27AHE3_B/H is 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as stated in the Thermal Characteristics section of the Vishay datasheet. This value guides PCB thermal design for sustained power dissipation up to 5.0 W.
SM6T27AHE3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, TransZorb®
- Packaging:
- Bulk
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SM6T27AHE3_B/H FAQ
1.How can I place an order for SM6T27AHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T27AHE3_B/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_B/H reliable?
The price and inventory of SM6T27AHE3_B/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_B/H is usually 5 days.
3.What payment methods are accepted for SM6T27AHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T27AHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T27AHE3_B/H?
SM6T27AHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T27AHE3_B/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_B/H?
For technical support, including SM6T27AHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T27AHE3_B/H requirements.
6.How does Aetrix verify that SM6T27AHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SM6T27AHE3_B/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_B/H meets industry standards.
7.What is the process for return or replacement of SM6T27AHE3_B/H?
All SM6T27AHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SM6T27AHE3_B/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_B/H part is unused and in its original packaging.
Return procedure for SM6T27AHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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