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Vishay General Semiconductor - Diodes Division SM6T30AHM3/I
- Part No.:
- SM6T30AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T30AHM3/I.pdf
- Description:
- TVS DIODE 25.6VWM 41.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,266
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Product details
Overview
SM6T30AHM3/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection of sensitive electronics. It features a 30 V breakdown voltage (VBR = 28.5–31.5 V at 1.0 mA), 41.5 V maximum clamping voltage (VC) at 14.5 A peak pulse current, 600 W peak pulse power (10/1000 μs), and SMB (DO-214AA) surface-mount package - deployed in automotive sensor signal lines, industrial I/O interfaces, and power supply rail protection.
For engineers reviewing the SM6T30AHM3/I datasheet, SM6T30AHM3/I pinout, SM6T30AHM3/I application, or SM6T30AHM3/I equivalent, key selection criteria include its AEC-Q101 qualification, halogen-free RoHS-compliant construction (HM3 suffix), 150 °C max junction temperature, and verified clamping performance under standardized surge waveforms.
Technical Context
The SM6T30AHM3/I operates as a unidirectional avalanche diode with glass-passivated junction, delivering precise voltage clamping during fast transients. Its low-inductance SMB package and MSL Level 1 rating support high-reliability automated assembly in harsh environments.
It is rated for non-repetitive 10/1000 μs surges up to 600 W and 14.5 A, with thermal resistance RθJA = 100 °C/W and RθJL = 20 °C/W. The cathode band denotes polarity, and it meets JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 28.5 V / 31.5 V at 1.0 mA - defines precise avalanche onset threshold for reliable triggering |
| VWM | 25.6 V - maximum continuous reverse stand-off voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 41.5 V at 14.5 A (10/1000 μs) - clamping voltage limiting protected circuit stress during surge |
| PPPM | 600 W - peak pulse power handling capability per standardized transient waveform |
| TJ max | +150 °C - enables operation in under-hood automotive and industrial ambient conditions |
| Package | SMB (DO-214AA) - industry-standard 2-pin SMD outline with 5.0 mm × 5.0 mm copper pad thermal design |
| Qualification | AEC-Q101 qualified (HM3 suffix) - validated for automotive-grade reliability and lifetime performance |
Pinout & Package
SMB (DO-214AA) surface-mount package with matte tin-plated leads; cathode indicated by molded band on body; no anode marking required for unidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VRM exceeded |
| Anode | Reference/ground return | Typically tied to system ground or low-impedance return path for clamping loop integrity |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables suppression of high-energy transients common in automotive load-dump and inductive switching events |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| MSL Level 1, 260 °C reflow compatible | Supports lead-free soldering without preconditioning or special handling in high-volume SMT lines |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control units, ADAS sensors, and body electronics |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for global OEM and Tier-1 supply chains |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from ESD and load-dump transients in vehicle cabins and powertrain zones. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between signal line and chassis ground to clamp voltage excursions above 25.6 V. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V interface ICs while maintaining signal integrity below VWM. |
Use Scenario: Safeguarding PLC digital input modules and fieldbus terminations against induced surges from relay coil switching and motor drive noise. IC Role / Device Role / Timing Role: Standoff-clamp protector on 24 V DC input lines, absorbing repetitive 600 W pulses without degradation. Use Value: Extends mean time between failures (MTBF) in factory automation systems operating continuously at 85 °C ambient. |
| Power Supply Rail Protection | Consumer Device USB Port |
Use Scenario: Secondary-side overvoltage suppression on 3.3 V/5 V/12 V DC-DC converter outputs feeding microcontrollers and memory subsystems. IC Role / Device Role / Timing Role: Fast-response clamping device placed adjacent to load, activated within nanoseconds of transient onset. Use Value: Limits VOUT excursion to ≤41.5 V during 10/1000 μs surges, preserving downstream ICs rated for 36 V absolute max. |
Use Scenario: ESD and surge protection for USB 2.0 data lines and VBUS in portable medical monitors and smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance unidirectional suppressor on VBUS line, grounded via short PCB trace to minimize loop inductance. Use Value: Passes IEC 61000-4-2 Level 4 (±15 kV air, ±8 kV contact) while adding <1 pF parasitic capacitance to signal path. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A | Same VBR range (28.5–31.5 V), but lower PPPM = 400 W; SMA package (larger footprint, higher RθJA) | Less suitable for automotive under-hood use due to 125 °C TJ max and no AEC-Q101 rating | Select SMAJ30A only for cost-sensitive commercial applications where 600 W surge margin is not required. |
| SMCJ30A | Higher PPPM = 1500 W, same VBR/VC, but larger SMC (DO-214AB) package and higher RθJA = 15 °C/W | Better for high-energy industrial surge environments (e.g., AC motor drives), but incompatible with SMB board space | Choose SMCJ30A when PCB layout allows larger footprint and system-level surge testing exceeds 600 W requirements. |
Compared with SMAJ30A and SMCJ30A, the SM6T30AHM3/I delivers optimal balance of AEC-Q101 qualification, 600 W surge capacity, and compact SMB footprint - making it the preferred choice for space-constrained, thermally demanding automotive and industrial designs requiring production-grade reliability.
Availability
SM6T30AHM3/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O interface hardening, and power supply rail clamping requiring stable component supply across multi-year production programs.
Supply support for SM6T30AHM3/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 automotive, industrial, and computing systems - prioritizing low clamping voltage, repeatable surge endurance, and AEC-Q101 compliance for mission-critical signal and power paths.
FAQ
What is the breakdown voltage tolerance of the SM6T30AHM3/I?
The SM6T30AHM3/I has a specified breakdown voltage (VBR) range of 28.5 V to 31.5 V at 1.0 mA test current, representing a ±5% tolerance around the nominal 30 V rating. This tight tolerance ensures consistent clamping behavior across production lots and supports precise overvoltage protection design in safety-critical circuits.
Is the SM6T30AHM3/I suitable for automotive applications?
Yes, the SM6T30AHM3/I is AEC-Q101 qualified (denoted by the HM3 suffix) and specifically designed for automotive use. It meets stringent reliability requirements for under-hood and cabin electronics, including thermal cycling, humidity resistance, and surge endurance - confirmed in Vishay's qualification report for the SM6T series.
What does the "HM3" suffix indicate in SM6T30AHM3/I?
The "HM3" suffix in SM6T30AHM3/I signifies halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from commercial-grade E3/M3 versions and confirms compliance with automotive environmental and reliability standards - critical for Tier-1 and OEM supply chain acceptance.
How does the clamping voltage of SM6T30AHM3/I compare to its breakdown voltage?
The SM6T30AHM3/I clamps at 41.5 V (VC) when subjected to a 14.5 A, 10/1000 μs surge - approximately 36% above its minimum VBR of 28.5 V. This controlled voltage overshoot ensures effective protection while staying within safe operating limits of typical 36 V-rated downstream ICs.
What is the thermal resistance of SM6T30AHM3/I, and how does it affect PCB layout?
The SM6T30AHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain TJ ≤ 150 °C at full 5.0 W steady-state dissipation, designers must provide adequate copper area and avoid thermal bottlenecks in the ground plane.
SM6T30AHM3/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):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.5V
- Current - Peak Pulse (10/1000µs):
- 14.5A
- 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)
SM6T30AHM3/I FAQ
1.How can I place an order for SM6T30AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T30AHM3/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 SM6T30AHM3/I reliable?
The price and inventory of SM6T30AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T30AHM3/I is usually 5 days.
3.What payment methods are accepted for SM6T30AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T30AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T30AHM3/I?
SM6T30AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T30AHM3/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 SM6T30AHM3/I?
For technical support, including SM6T30AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T30AHM3/I requirements.
6.How does Aetrix verify that SM6T30AHM3/I is sourced from the original manufacturer or authorized distributors?
All SM6T30AHM3/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 SM6T30AHM3/I meets industry standards.
7.What is the process for return or replacement of SM6T30AHM3/I?
All SM6T30AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T30AHM3/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 SM6T30AHM3/I part is unused and in its original packaging.
Return procedure for SM6T30AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T30AHM3/I Tags
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