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Vishay General Semiconductor - Diodes Division SM6T27CAHM3/I
- Part No.:
- SM6T27CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T27CAHM3/I.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,307
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Product details
Overview
SM6T27CAHM3/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features a 27 V breakdown voltage (VBR = 25.7–28.4 V at 1 mA), 37.5 V maximum 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 automotive sensor interfaces and industrial I/O circuits.
For engineers reviewing the SM6T27CAHM3/I datasheet, SM6T27CAHM3/I pinout, SM6T27CAHM3/I application, or SM6T27CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, halogen-free RoHS compliance, and thermal resistance (RθJA = 100 °C/W) under standard PCB pad layout.
Technical Context
The SM6T27CAHM3/I operates as a voltage-clamping protection device using an avalanche junction structure. Its bidirectional symmetry enables suppression of both positive and negative transients without polarity sensitivity, and its glass-passivated chip junction ensures stable leakage performance (<1.0 μA at 23.1 V) across temperature.
Designed for surface-mount placement on 0.2" × 0.2" copper pads, it delivers low-inductance transient response and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. The device sustains 150 °C maximum junction temperature and supports repetitive surge handling when derated above 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V at 1 mA - defines reliable avalanche initiation threshold in both directions |
| VWM | 23.1 V - maximum continuous reverse stand-off voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 37.5 V at 16.0 A (10/1000 μs) - clamping voltage limiting downstream circuit stress during ESD or load dump |
| PPPM | 600 W - peak transient power absorption capacity under standardized surge waveform |
| RθJA | 100 °C/W - thermal resistance from junction to ambient, measured on 5.0 mm × 5.0 mm copper pads |
| TJ max. | +150 °C - maximum allowable junction temperature for continuous operation and surge reliability |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Bidirectional construction means no cathode/anode marking; terminals are symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional transient path | Either terminal serves as input/output for clamping; no polarity dependency in circuit layout |
| Case | Thermal conduction path | Exposed metal area transfers heat to PCB copper; requires minimum 5.0 mm × 5.0 mm pad per terminal |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables robust protection against ISO 7637-2 Load Dump (Pulse 5a) and IEC 61000-4-5 surges up to 4 kV |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage exposure to protected ICs such as CAN transceivers or microcontroller GPIOs |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control modules and body electronics |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free assembly without moisture-related popcorn failure risk |
| Glass passivated junction | Ensures stable leakage current (<1.0 μA) and long-term reliability under humid or high-bias conditions |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting LIN bus sensors and analog temperature/pressure transducers from battery transients and ESD in vehicle cabins. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between sensor output line and ground, responding within nanoseconds to voltage spikes. Use Value: Maintains signal integrity below 37.5 V during 16 A surge events, preventing latch-up or damage to 3.3 V/5 V sensor interface ICs. | Use Scenario: Shielding PLC digital input channels from inductive kickback caused by relay or solenoid switching. IC Role / Device Role / Timing Role: Fast-response shunt device connected across input terminals to divert surge energy away from optocoupler inputs. Use Value: Limits transient voltage to ≤37.5 V at 16 A, ensuring compatibility with 24 V DC industrial logic thresholds and reducing false triggering. |
| Telecom Line Protection | Consumer USB Port ESD Guard |
Use Scenario: Safeguarding Ethernet PHY front-end components (e.g., magnetics, PHY ICs) against lightning-induced surges on PoE data lines. IC Role / Device Role / Timing Role: Primary-level TVS placed upstream of common-mode chokes to absorb differential-mode transients before they reach sensitive silicon. Use Value: Withstands 600 W pulses while maintaining <1.0 μA leakage at 23.1 V, preserving signal-to-noise ratio in 100BASE-TX operation. | Use Scenario: Adding secondary-level ESD protection on USB 2.0 D+/D− lines in portable audio devices and smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp integrated into USB connector footprint to suppress ±8 kV contact discharge per IEC 61000-4-2. Use Value: Clamps to 37.5 V within <1 ns, preventing damage to USB transceivers without degrading 480 Mbps data eye integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ27CA | Same SMB package, identical VBR range (25.7–28.4 V), but rated for 600 W with tighter VC tolerance (37.5 V max vs. 38.9 V for SMBJ); not AEC-Q101 qualified | Targeted at commercial/industrial use only; lacks automotive qualification and halogen-free certification | Select SMBJ27CA for cost-sensitive non-automotive designs where AEC-Q101 is not required |
| 1.5KE27CA | Through-hole DO-201 package, same VBR, higher PPPM (1500 W), but RθJA > 30 °C/W and incompatible with SMT assembly | Used in legacy power supply designs or high-energy surge zones where board space allows axial leads | Choose 1.5KE27CA only when retrofitting existing through-hole layouts or needing >600 W dissipation with heatsinking |
Compared with SMBJ27CA and 1.5KE27CA, SM6T27CAHM3/I uniquely combines AEC-Q101 qualification, halogen-free compliance, and SMB footprint - making it the preferred choice for new automotive and high-reliability SMT designs requiring zero rework for qualification or environmental compliance.
Availability
SM6T27CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial programmable logic controllers, and telecom infrastructure equipment requiring stable component supply with full traceability and lifecycle management.
Supply support for SM6T27CAHM3/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 reliability, efficiency, and application-specific optimization.
The SM6T Series is engineered for high-speed transient suppression in space-constrained environments, targeting automotive, industrial, and communications systems where bidirectional clamping, AEC-Q101 compliance, and surface-mount scalability are critical.
FAQ
What does the "HM3" suffix indicate in SM6T27CAHM3/I?
The "HM3" suffix in SM6T27CAHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It confirms the device meets automotive reliability standards and environmental regulations, distinguishing it from commercial-grade "M3" or non-qualified "E3" variants. SM6T27CAHM3/I is fully traceable to Vishay's qualified production lot and certified for use in safety-critical vehicle subsystems.
Is SM6T27CAHM3/I unidirectional or bidirectional?
SM6T27CAHM3/I is a bidirectional transient voltage suppressor, as indicated by the "CA" suffix. It provides symmetrical clamping for both positive- and negative-going transients without polarity dependence. Unlike unidirectional versions (e.g., SM6T27A), SM6T27CAHM3/I has no cathode band marking and functions identically regardless of terminal orientation in the circuit.
What is the maximum clamping voltage of SM6T27CAHM3/I under surge conditions?
The maximum clamping voltage of SM6T27CAHM3/I is 37.5 V when subjected to a 10/1000 μs waveform at 16.0 A peak pulse current (IPPM). This value is guaranteed per Vishay's datasheet and reflects worst-case voltage seen by downstream components during standardized surge events - critical for ensuring compatibility with 24 V or 3.3 V logic interfaces.
Does SM6T27CAHM3/I require a heatsink for standard operation?
No, SM6T27CAHM3/I does not require an external heatsink for typical transient suppression duty cycles. Its RθJA of 100 °C/W is specified with 0.2" × 0.2" copper pads per terminal, which provide sufficient thermal dissipation for short-duration surges. Continuous power dissipation is limited to 5.0 W, so sustained DC loading is not intended - SM6T27CAHM3/I is optimized for pulsed, not steady-state, operation.
How does SM6T27CAHM3/I compare to SM6T27A in terms of electrical performance?
SM6T27CAHM3/I and SM6T27A share identical VBR (25.7–28.4 V), VWM (23.1 V), and VC (37.5 V) specifications, but differ in polarity and qualification: SM6T27CAHM3/I is bidirectional and AEC-Q101/halogen-free qualified, while SM6T27A is unidirectional and commercial-grade. Their clamping behavior and surge ratings are otherwise matched, but SM6T27CAHM3/I supports automotive deployment where polarity-agnostic protection is needed.
SM6T27CAHM3/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:
- -
- Bidirectional Channels:
- 1
- 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)
SM6T27CAHM3/I FAQ
1.How can I place an order for SM6T27CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T27CAHM3/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 SM6T27CAHM3/I reliable?
The price and inventory of SM6T27CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T27CAHM3/I is usually 5 days.
3.What payment methods are accepted for SM6T27CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T27CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T27CAHM3/I?
SM6T27CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T27CAHM3/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 SM6T27CAHM3/I?
For technical support, including SM6T27CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T27CAHM3/I requirements.
6.How does Aetrix verify that SM6T27CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SM6T27CAHM3/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 SM6T27CAHM3/I meets industry standards.
7.What is the process for return or replacement of SM6T27CAHM3/I?
All SM6T27CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T27CAHM3/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 SM6T27CAHM3/I part is unused and in its original packaging.
Return procedure for SM6T27CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T27CAHM3/I Tags
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