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Vishay General Semiconductor - Diodes Division SM6T27AHM3_B/H
- Part No.:
- SM6T27AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T27AHM3_B/H.pdf
- Description:
- 600W,27V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:6,913
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Product details
Overview
SM6T27AHM3_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), 37.5 V maximum clamping voltage (VC) at 16 A peak pulse current, and 600 W peak pulse power rating per 10/1000 μs waveform. It protects MOSFETs and signal lines in automotive sensor units against inductive switching transients.
For engineers reviewing the SM6T27AHM3_B/H datasheet, SM6T27AHM3_B/H pinout, SM6T27AHM3_B/H application, or SM6T27AHM3_B/H equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, SMB package thermal data, and direct alternative part comparisons for ESD and surge protection design-in.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, designed to shunt transient energy above its stand-off voltage (VWM = 23.1 V) while maintaining low leakage (<1 μA). Its glass-passivated junction ensures stable breakdown behavior under repetitive surge stress.
The device meets J-STD-020 MSL Level 1 (peak reflow ≤260 °C), features matte tin-plated leads, and is halogen-free and RoHS-compliant. Its 20 °C/W junction-to-lead thermal resistance supports reliable power dissipation in compact PCB layouts with minimum 5.0 mm × 5.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V at 1 mA - defines precise clamping onset threshold for overvoltage detection |
| VWM | 23.1 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA |
| VC @ IPPM | 37.5 V at 16 A (10/1000 μs) - limits downstream voltage during worst-case surge events |
| PPPM | 600 W - peak transient power handling capacity under standardized surge waveform |
| TJ max. | +150 °C - enables operation in under-hood automotive environments without derating |
| RθJL | 20 °C/W - quantifies thermal path efficiency from junction to lead for layout-driven cooling |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, with cathode band marking on unidirectional variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current return path | Connected to ground or low-impedance reference plane to complete clamping loop |
| Cathode | Transient current input node | Connected to protected line (e.g., sensor supply or signal trace); band denotes this terminal |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Withstands high-energy surges common in automotive load-dump and ISO 7637-2 tests |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage margin between clamping and protected IC's absolute maximum rating |
| MSL Level 1 moisture sensitivity | Eliminates bake requirements prior to SMT reflow, reducing manufacturing cost and risk |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-switching transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between signal line and ground, activated within nanoseconds of overvoltage event. Use Value: Limits transient voltage to ≤37.5 V, preventing damage to 3.3 V or 5 V interface ICs rated for ≤40 V absolute maximum. | Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Standoff protector on 24 V DC input channels, absorbing repetitive 600 W surges without degradation. Use Value: Maintains <1 μA leakage at 23.1 V, ensuring clean logic-level recognition while surviving >1000 surges per IEC 61000-4-5. |
| Consumer Power Adapter Input | Telecom Line Interface Protection |
Use Scenario: Secondary-side overvoltage suppression on AC/DC adapter outputs feeding USB-C PD controllers or PMICs. IC Role / Device Role / Timing Role: Fast-response clamp on regulated 5–20 V rails, triggered by capacitor discharge or regulator fault. Use Value: Clamps to 37.5 V within 1 ns, protecting downstream silicon with 30 V absolute maximum ratings. | Use Scenario: Surge protection on Ethernet PHY power rails (e.g., +3.3 V bias) in PoE-powered switches and access points. IC Role / Device Role / Timing Role: Low-inductance TVS mounted adjacent to connector, shunting lightning-induced common-mode transients. Use Value: 20 °C/W RθJL enables effective heat transfer into PCB copper, sustaining repeated 10/1000 μs surges without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ27A | Same VBR range (25.7–28.4 V), but 400 W PPPM and SMA package (higher RθJA = 150 °C/W) | Limited to lower-energy transients; less suitable for automotive load-dump where 600 W is required | Select SM6T27AHM3_B/H when 600 W surge rating and AEC-Q101 qualification are mandatory |
| SMCJ27A | Same VBR, 1500 W PPPM, but larger SMC (DO-214AB) package (4.5 mm × 3.9 mm vs. SMB's 3.9 mm × 2.2 mm) | Requires more PCB area; better for industrial mains-survival applications than space-constrained automotive modules | Choose SM6T27AHM3_B/H for footprint-sensitive designs needing AEC-Q101 and 600 W balance |
Compared with SMAJ27A and SMCJ27A, SM6T27AHM3_B/H delivers optimal trade-off of automotive qualification, 600 W surge capability, and SMB footprint-enabling robust protection in tight-layout ECUs without sacrificing reliability or requiring board redesign.
Availability
SM6T27AHM3_B/H is available at Aetrix Electronics and suitable for automotive sensor units, industrial PLC I/O modules, consumer power adapter outputs, and telecom line interfaces requiring stable component supply across production lifecycles.
Supply support for SM6T27AHM3_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 passive components with emphasis on reliability and application-specific performance.
The SM6T Series is engineered for high-reliability transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where AEC-Q101 compliance and repeatable clamping performance are critical.
FAQ
What is the clamping voltage of SM6T27AHM3_B/H at its rated peak pulse current?
The SM6T27AHM3_B/H has a maximum clamping voltage (VC) of 37.5 V when subjected to a 10/1000 μs waveform peak pulse current of 16 A. This value is measured under standard test conditions (TA = 25 °C, mounted on 5.0 mm × 5.0 mm copper pads) and defines the upper voltage limit imposed on protected circuitry during surge events. The SM6T27AHM3_B/H maintains this clamping performance consistently due to its glass-passivated junction and low-inductance SMB package.
Is SM6T27AHM3_B/H qualified for automotive applications?
Yes, SM6T27AHM3_B/H is AEC-Q101 qualified, as indicated by the "HM3" suffix (halogen-free, RoHS-compliant, and AEC-Q101 qualified). It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge per AEC-Q101 standards. The SM6T27AHM3_B/H is specifically intended for use in automotive subsystems such as body control modules, sensor interfaces, and infotainment power rails where reliability under thermal and electrical stress is mandatory.
What does the "_B/H" suffix mean in SM6T27AHM3_B/H?
The "_B/H" suffix in SM6T27AHM3_B/H denotes packaging configuration: "B" indicates tape-and-reel delivery per EIA-481 standard, and "H" specifies a 7-inch diameter reel containing 750 units. This ordering code aligns with Vishay's preferred package code system and confirms the part is supplied in halogen-free, RoHS-compliant form with AEC-Q101 qualification. The SM6T27AHM3_B/H is not a sample or evaluation variant-it is a full-production, automotive-grade part.
How does SM6T27AHM3_B/H compare to bidirectional TVS diodes like SM6T27CA?
SM6T27AHM3_B/H is unidirectional, meaning it conducts only during reverse-bias overvoltage events and blocks forward current up to its rated IFSM (100 A). In contrast, SM6T27CA is bidirectional and provides symmetrical clamping for AC-coupled or floating lines. The SM6T27AHM3_B/H offers lower leakage (<1 μA at 23.1 V) and higher surge current capability in DC-biased applications, making it preferable for power rail and signal-line protection where polarity is fixed and forward conduction must be avoided.
What is the thermal resistance from junction to ambient for SM6T27AHM3_B/H?
The SM6T27AHM3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on standard 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per JEDEC standards. However, its junction-to-lead resistance (RθJL) is 20 °C/W-indicating superior heat transfer to PCB traces via soldered leads. For thermal design, engineers should prioritize copper pad area and internal layer connectivity, as the SM6T27AHM3_B/H relies on conduction through leads rather than ambient convection for sustained power dissipation.
SM6T27AHM3_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)
SM6T27AHM3_B/H FAQ
1.How can I place an order for SM6T27AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T27AHM3_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 SM6T27AHM3_B/H reliable?
The price and inventory of SM6T27AHM3_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 SM6T27AHM3_B/H is usually 5 days.
3.What payment methods are accepted for SM6T27AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T27AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T27AHM3_B/H?
SM6T27AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T27AHM3_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 SM6T27AHM3_B/H?
For technical support, including SM6T27AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T27AHM3_B/H requirements.
6.How does Aetrix verify that SM6T27AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SM6T27AHM3_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 SM6T27AHM3_B/H meets industry standards.
7.What is the process for return or replacement of SM6T27AHM3_B/H?
All SM6T27AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SM6T27AHM3_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 SM6T27AHM3_B/H part is unused and in its original packaging.
Return procedure for SM6T27AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T27AHM3_B/H Tags
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