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Vishay General Semiconductor - Diodes Division SM6T27AHM3_B/I
- Part No.:
- SM6T27AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T27AHM3_B/I.pdf
- Description:
- 600W,27V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,853
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Product details
Overview
SM6T27AHM3_B/I 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 a 27 V breakdown voltage (VBR = 25.7–28.4 V at 1 mA), 23.1 V stand-off voltage (VWM), 37.5 V max clamping voltage (VC) at 16.0 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SM6T27AHM3_B/I datasheet, SM6T27AHM3_B/I pinout, SM6T27AHM3_B/I application, or SM6T27AHM3_B/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, low clamping ratio (VC/VBR ≈ 1.39), and thermal resistance (RθJA = 100 °C/W) under standard PCB pad layout.
Technical Context
The SM6T27AHM3_B/I operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its specified VBR range (25.7–28.4 V). Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 μA at VWM = 23.1 V).
It delivers 600 W transient suppression capability per 10/1000 μs waveform with a clamping voltage of 37.5 V at 16.0 A, enabling robust protection against ESD, inductive switching spikes, and lightning surges in 12 V and 24 V automotive subsystems and industrial I/O circuits.
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 reliable overvoltage triggering |
| VWM | 23.1 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | 37.5 V at 16.0 A (10/1000 μs) - clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 600 W - peak transient power handling capacity under standardized surge waveform |
| RθJA | 100 °C/W - thermal resistance from junction to ambient, measured on 0.2" × 0.2" copper pads |
| TJ max | +150 °C - maximum allowable junction temperature for sustained operation and reliability |
| Leakage ID | <1.0 μA at VWM - ensures minimal power loss and signal integrity in standby conditions |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, AEC-Q101 qualified. Cathode indicated by band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VREV > VBR |
| Anode (unmarked end) | Reference node | Typically tied to system ground or lower-potential rail; completes clamping path |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables single-device protection against high-energy transients (e.g., ISO 7637-2 Pulse 1/2a/5a) without derating |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive powertrain, body electronics, and ADAS modules requiring zero-failure reliability |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes stress on downstream components by limiting clamped voltage close to breakdown threshold |
| Glass-passivated junction | Ensures stable VBR, low leakage, and long-term parameter consistency across temperature and life cycles |
| MSL Level 1 (260 °C peak) | Supports standard SMT reflow without moisture-related popcorn failure or delamination |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply rails feeding ECUs, lighting drivers, and window motor controllers from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery rail and local regulator input. Use Value: Clamps 12 V system surges up to 37.5 V, preventing damage to LDOs and microcontrollers rated for ≤40 V absolute maximum. | Use Scenario: Safeguarding analog front-end inputs of pressure, temperature, and position sensors connected to PLC I/O modules. IC Role / Device Role / Timing Role: Standoff protection device on sensor signal lines exposed to field wiring inductive coupling. Use Value: Limits induced transients to ≤37.5 V while maintaining sub-1 μA leakage at 23.1 V, preserving signal accuracy and ADC reference stability. |
| Telecom DC Power Input | Consumer Appliance Motor Control |
Use Scenario: Shielding 24 V/48 V telecom power entry points from lightning-induced surges and hot-swap transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on bulk DC input before DC/DC converter stage. Use Value: Absorbs 600 W pulses without degradation, meeting ITU-T K.20/21 immunity requirements for central office equipment. | Use Scenario: Protecting gate drivers and MCU I/O pins in washing machine, HVAC, and power tool motor inverters. IC Role / Device Role / Timing Role: Secondary-level transient suppressor on low-side MOSFET source lines and feedback paths. Use Value: Withstands repetitive 100 A IFSM surges and maintains <1 μA leakage, ensuring long-term reliability in high-humidity environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A | Same SMB package, 24 V VBR (22.8–25.2 V), 38.9 V VC at 15.4 A, non-AEC-Q101 | Lacks automotive qualification; suitable for commercial/industrial only | Select when AEC-Q101 is not required and tighter VWM (21.6 V) is acceptable |
| SMCJ27A | Higher-power SMC package (1500 W), same VBR range, 43.5 V VC at 34.5 A, AEC-Q101 available (HM3 variant) | Physically larger (7.11 × 6.22 mm vs. 4.57 × 3.94 mm); requires PCB redesign | Choose for higher surge duty cycles or where 1500 W rating is mandated by system-level testing |
Compared with SMAJ24A and SMCJ27A, the SM6T27AHM3_B/I offers optimal balance of AEC-Q101 compliance, compact SMB footprint, and precise 27 V clamping for 24 V nominal systems - making it ideal for space-constrained automotive modules where qualification and form factor are critical.
Availability
SM6T27AHM3_B/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor protection, and telecom power input applications requiring stable component supply, halogen-free compliance, and AEC-Q101 validation.
Supply support for SM6T27AHM3_B/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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The SM6T Series is engineered for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where consistent clamping, low leakage, and qualification-grade consistency are mandatory.
FAQ
What is the breakdown voltage tolerance for SM6T27AHM3_B/I?
The SM6T27AHM3_B/I has a specified breakdown voltage (VBR) range of 25.7 V to 28.4 V at 1.0 mA test current, representing ±10% tolerance around the nominal 27 V rating. This tight distribution ensures predictable clamping onset across production lots and supports robust design margins in 24 V automotive and industrial systems.
Is SM6T27AHM3_B/I suitable for automotive applications?
Yes, SM6T27AHM3_B/I is AEC-Q101 qualified (denoted by HM3 suffix), halogen-free, and RoHS-compliant - meeting requirements for automotive body electronics, infotainment power supplies, and ADAS sensor interfaces. Its 150 °C max junction temperature and MSL Level 1 rating further validate suitability for under-hood and module-integrated use cases.
What does the "B/I" suffix mean in SM6T27AHM3_B/I?
The "B/I" suffix in SM6T27AHM3_B/I indicates packaging configuration: "B" denotes revision code B per Vishay's internal documentation, and "I" specifies 13-inch diameter plastic tape-and-reel delivery with 3200 units per reel. This format enables automated SMT placement and aligns with standard J-STD-033 handling protocols.
How does SM6T27AHM3_B/I compare to bidirectional TVS diodes like SM6T27CA?
The SM6T27AHM3_B/I is unidirectional and intended for DC line protection where polarity is fixed (e.g., +24 V rail to ground), whereas SM6T27CA is bidirectional and suited for AC or differential signal lines. Their VBR, VC, and PPPM ratings are identical, but SM6T27AHM3_B/I provides lower leakage and avoids ambiguity in cathode orientation on polarized circuits.
What is the maximum clamping voltage of SM6T27AHM3_B/I under surge conditions?
The SM6T27AHM3_B/I exhibits a maximum clamping voltage (VC) of 37.5 V when subjected to a 10/1000 μs waveform at 16.0 A peak pulse current. This value is guaranteed per Vishay's datasheet and reflects worst-case conduction behavior - critical for verifying that protected ICs remain within their absolute maximum voltage ratings during transient events.
SM6T27AHM3_B/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:
- 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)
SM6T27AHM3_B/I FAQ
1.How can I place an order for SM6T27AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T27AHM3_B/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 SM6T27AHM3_B/I reliable?
The price and inventory of SM6T27AHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T27AHM3_B/I is usually 5 days.
3.What payment methods are accepted for SM6T27AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T27AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T27AHM3_B/I?
SM6T27AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T27AHM3_B/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 SM6T27AHM3_B/I?
For technical support, including SM6T27AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T27AHM3_B/I requirements.
6.How does Aetrix verify that SM6T27AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SM6T27AHM3_B/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 SM6T27AHM3_B/I meets industry standards.
7.What is the process for return or replacement of SM6T27AHM3_B/I?
All SM6T27AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T27AHM3_B/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 SM6T27AHM3_B/I part is unused and in its original packaging.
Return procedure for SM6T27AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T27AHM3_B/I Tags
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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