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Vishay General Semiconductor - Diodes Division SM6T27AHM3/I
- Part No.:
- SM6T27AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T27AHM3/I.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,832
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Product details
Overview
SM6T27AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount TRANSZORB® transient voltage suppressor 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), 37.5 V clamping voltage (VC) at 16.0 A peak pulse current, and 600 W peak pulse power rating per 10/1000 μs waveform - used to protect MOSFETs and sensor signal lines in automotive ECUs and industrial motor drives.
For engineers reviewing the SM6T27AHM3/I datasheet, SM6T27AHM3/I pinout, SM6T27AHM3/I application, or SM6T27AHM3/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, low-inductance SMB package, and verified clamping performance under IEC 61000-4-5 surge conditions.
Technical Context
This device operates as a silicon avalanche diode designed for unidirectional transient suppression. It exhibits a tightly controlled breakdown voltage tolerance (±5%), low dynamic impedance, and thermal resistance of 20 °C/W junction-to-lead - enabling reliable energy diversion during fast-rising ESD or load-switching transients.
The SM6T27AHM3/I is rated for 150 °C maximum junction temperature and meets J-STD-020 MSL Level 1 moisture sensitivity with 260 °C reflow peak. Its cathode-band marking and matte tin-plated leads ensure compatibility with automated SMT assembly and JESD 22-B102 solderability standards.
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 repeatable clamping onset |
| VWM | 23.1 V - maximum continuous reverse voltage before leakage exceeds 1.0 μA, ensuring no false triggering |
| VC @ IPPM | 37.5 V at 16.0 A (10/1000 μs) - limits protected circuit voltage during worst-case surge events |
| PPPM | 600 W - peak transient power handling capability without degradation under standardized surge waveform |
| TJ max. | +150 °C - enables operation in under-hood automotive environments and high-ambient industrial enclosures |
| Package | SMB (DO-214AA) - 3.94 mm × 2.20 mm footprint with 2.18 mm minimum cathode pad width for thermal reliability |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional polarity with cathode band marking on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current return path | Connected to system ground or low-impedance reference plane to complete clamping loop |
| Cathode | Avalanche conduction terminal | Connected to protected line (e.g., sensor VOUT, gate drive); band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth) without failure when properly mounted |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive powertrain and body electronics per stress test requirements including HTOL and TC |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A material declaration requirements for green manufacturing |
| Low inductance SMB package | Minimizes voltage overshoot during nanosecond-scale transients (< 1 nH parasitic inductance typical) |
Applications
| Automotive Engine Control Unit (ECU) Protection | Industrial Motor Drive Gate Signal Line |
|---|---|
Use Scenario: Suppresses load-dump and alternator ripple transients on 12 V supply rails feeding microcontroller power domains. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VCC and GND, clamping overvoltage within 100 ns after event onset. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic supplies by limiting rail voltage to ≤37.5 V during 600 W surges. | Use Scenario: Shields isolated gate driver outputs from Miller-induced voltage spikes during IGBT switching transitions. IC Role / Device Role / Timing Role: Fast-response avalanche diode connected anode-to-ground, cathode-to-gate, diverting dv/dt-induced current. Use Value: Maintains gate voltage integrity below 20 V threshold, avoiding unintended IGBT turn-on and shoot-through failure. |
| Automotive Cabin Sensor Interface | Industrial PLC Analog Input Protection |
Use Scenario: Protects LIN bus transceivers and MEMS sensor signal lines against ESD (IEC 61000-4-2 ±8 kV contact) in HVAC modules. IC Role / Device Role / Timing Role: Unidirectional TVS on signal line with cathode tied to VIO, anode to GND, operating below VWM = 23.1 V. Use Value: Ensures signal integrity remains intact while clamping ESD pulses to <37.5 V, preserving ADC input range and sensor accuracy. | Use Scenario: Guards 4–20 mA current-loop inputs against field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Standoff-rated TVS across input terminals, absorbing 10/1000 μs transients up to 600 W without leakage drift. Use Value: Eliminates need for external series resistors or gas discharge tubes, reducing BOM count and PCB area by 35% vs. discrete protection stacks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ28A-E3/5B | Same SMB package, VBR = 29.1–32.2 V, VC = 45.4 V @ 13.2 A, non-AEC-Q101, RoHS-compliant only | Higher clamping voltage reduces margin for 24 V systems; suitable for commercial-grade industrial use only | Select when AEC-Q101 is not required and higher VC is acceptable for legacy 24 V designs |
| SMCJ28A-Q | SMC (DO-214AB) package, VBR = 29.1–32.2 V, PPPM = 1500 W, AEC-Q101 qualified, larger footprint (7.11 mm × 6.22 mm) | Higher power rating supports repeated surge events but requires 3× PCB area vs. SMB | Choose when system-level surge testing exceeds 600 W or multiple surge cycles must be sustained |
Compared with SMAJ28A-E3/5B and SMCJ28A-Q, the SM6T27AHM3/I delivers optimal balance of AEC-Q101 compliance, compact SMB footprint, and 37.5 V clamping - making it preferred for space-constrained automotive modules where both reliability and board area are critical.
Availability
SM6T27AHM3/I is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drives, cabin sensor interfaces, and PLC analog input circuits requiring stable component supply across extended production lifecycles.
Supply support for SM6T27AHM3/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 protection devices with emphasis on high-reliability and automotive-grade solutions.
The SM6T Series is engineered specifically for robust transient suppression in harsh environments - targeting automotive power distribution, industrial motor controls, and sensor interface protection where AEC-Q101 validation and consistent clamping performance are mandatory.
FAQ
What is the clamping voltage of the SM6T27AHM3/I under standard surge conditions?
The SM6T27AHM3/I has a maximum clamping voltage (VC) of 37.5 V at 16.0 A peak pulse current with a 10/1000 μs waveform. This value is measured per Figure 1 in Vishay Document 88385 and ensures protected circuits remain below critical voltage thresholds during standardized surge events. The SM6T27AHM3/I maintains this clamping performance across its full operating temperature range.
Is the SM6T27AHM3/I qualified for automotive applications?
Yes, the SM6T27AHM3/I is AEC-Q101 qualified, as confirmed by the HM3 suffix in its ordering code. It undergoes stress testing including high-temperature operating life (HTOL), temperature cycling, and unbiased highly accelerated stress testing (uHAST) per AEC-Q101 Rev D. The SM6T27AHM3/I is approved for use in automotive powertrain, body electronics, and infotainment systems.
What does the "HM3" suffix indicate in SM6T27AHM3/I?
The "HM3" suffix in SM6T27AHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from commercial-grade versions (E3/M3) and confirms compliance with automotive reliability standards and environmental regulations. The "I" denotes 13-inch tape-and-reel packaging with 3200 units per reel.
How does the SM6T27AHM3/I compare to bidirectional TVS diodes in sensor protection?
The SM6T27AHM3/I is unidirectional and intended for DC-biased lines like power rails or single-ended signal paths with defined polarity. Unlike bidirectional devices (e.g., SM6T27CA), it provides lower leakage and tighter VBR tolerance in DC applications. For SM6T27AHM3/I, reverse standoff is 23.1 V and forward conduction begins near 0.7 V - making it unsuitable for AC-coupled or symmetrical signal lines.
What is the thermal resistance specification for the SM6T27AHM3/I?
The SM6T27AHM3/I has a typical thermal resistance of 20 °C/W from junction to lead (RθJL) and 100 °C/W from junction to ambient air (RθJA) on 0.2" × 0.2" copper pads. This allows safe dissipation of 5.0 W continuous power at 50 °C ambient when mounted per recommended pad layout. The SM6T27AHM3/I's RθJL enables effective heat transfer to PCB copper planes during transient events.
SM6T27AHM3/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:
- Discontinued at Digi-Key
- 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 (SMB)
SM6T27AHM3/I FAQ
1.How can I place an order for SM6T27AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T27AHM3/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/I reliable?
The price and inventory of SM6T27AHM3/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/I is usually 5 days.
3.What payment methods are accepted for SM6T27AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T27AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T27AHM3/I?
SM6T27AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T27AHM3/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/I?
For technical support, including SM6T27AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T27AHM3/I requirements.
6.How does Aetrix verify that SM6T27AHM3/I is sourced from the original manufacturer or authorized distributors?
All SM6T27AHM3/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/I meets industry standards.
7.What is the process for return or replacement of SM6T27AHM3/I?
All SM6T27AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T27AHM3/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/I part is unused and in its original packaging.
Return procedure for SM6T27AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T27AHM3/I Tags
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