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Vishay General Semiconductor - Diodes Division SM6T30AHM3/H
- Part No.:
- SM6T30AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T30AHM3/H.pdf
- Description:
- TVS DIODE 25.6VWM 41.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,037
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Product details
Overview
SM6T30AHM3/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping ESD and surge transients on power/signal lines. It features 30 V standoff voltage (VWM = 25.6 V), 31.5 V minimum breakdown (VBR), 41.5 V max clamping voltage at 14.5 A (10/1000 μs), 600 W peak pulse power, and AEC-Q101 qualification for automotive electronics protection.
For engineers reviewing the SM6T30AHM3/H datasheet, SM6T30AHM3/H pinout, SM6T30AHM3/H application, or SM6T30AHM3/H equivalent, key selection criteria include clamping performance under 10/1000 μs surge, unidirectional polarity with cathode band marking, halogen-free RoHS compliance, and suitability for automotive-grade board-level surge immunity per ISO 7637-2 and IEC 61000-4-5.
Technical Context
This TVS diode operates as a fast-acting shunt clamp during overvoltage events, leveraging an avalanche junction to divert transient current away from protected circuitry. Its low clamping ratio (VC/VBR ≈ 1.31) and low dynamic impedance ensure effective suppression of inductive switching spikes and ESD pulses up to ±30 kV contact discharge.
The device is rated for 150 °C maximum junction temperature and exhibits 100 °C/W junction-to-ambient thermal resistance when mounted on 5.0 mm × 5.0 mm copper pads. Its 10/1000 μs waveform rating reflects standardized surge testing per IEC 61000-4-5, with derating applied above 25 °C ambient per Fig. 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 25.6 V - Maximum reverse working voltage before leakage exceeds 1 μA; defines safe operating range for continuous DC bias. |
| VBR (min) | 28.5 V - Minimum breakdown voltage at 1 mA test current; ensures reliable turn-on during transients without premature conduction. |
| VC @ IPPM | 41.5 V at 14.5 A (10/1000 μs) - Clamping voltage seen by protected IC/MOSFET during worst-case surge; limits stress on downstream components. |
| PPPM | 600 W - Peak pulse power handling capability; supports robust protection against ISO 7637-2 Pulse 1/2a/5a surges in automotive systems. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments with high ambient thermal load. |
| Package | SMB (DO-214AA) - Surface-mount package with 2.20 mm height and 3.94 mm length; compatible with standard SMT reflow profiles and automated placement. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional configuration with cathode indicated by a band on the case body. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, qualified to JESD 201 Class 2 whisker test.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to ground or lower-potential rail in unidirectional TVS configuration; forms return path for surge current. |
| Cathode | Current exit terminal during reverse-biased clamping | Marked with band; connected to line being protected (e.g., 12 V supply rail); conducts avalanche current to ground during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensors, supporting long-term reliability under thermal cycling and vibration stress. |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for global automotive OEMs and industrial equipment; no brominated flame retardants in molding compound. |
| 600 W peak pulse power (10/1000 μs) | Enables single-device protection against severe load-dump and inductive-switching transients common in 12 V vehicle electrical systems. |
| Low clamping voltage (41.5 V) | Provides tighter voltage margin between clamping level and 33 V-rated downstream ICs, reducing risk of overvoltage damage during surge events. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump (ISO 7637-2 Pulse 5a) and alternator-induced transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between power rail and chassis ground to clamp surges before they reach MCU or CAN transceiver. Use Value: Limits peak voltage to ≤41.5 V during 14.5 A surge, preserving 33 V-rated power management ICs and ensuring system-level EMC compliance. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC modules exposed to relay coil flyback. IC Role / Device Role / Timing Role: Low-capacitance TVS on signal lines to absorb 10/1000 μs inductive spikes without distorting millivolt-level sensor signals. Use Value: Maintains signal integrity with <10 pF junction capacitance at zero bias, while clamping transients within 1 ns response time to prevent ADC saturation. |
| Consumer Device USB Port Protection | Telecom Line Card Surge Suppression |
Use Scenario: ESD protection for USB 2.0 VBUS and D+/D− lines in portable medical monitors and smart home hubs. IC Role / Device Role / Timing Role: Primary-level TVS on input rails to meet IEC 61000-4-2 ±15 kV air/±8 kV contact discharge requirements. Use Value: Withstands repeated ESD strikes without parametric shift due to glass-passivated junction, extending field lifetime beyond 10,000 cycles. | Use Scenario: Secondary surge protection on Ethernet PHY power rails in telecom access equipment subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Coordinated clamping device staged after GDT or MOV to limit let-through voltage to PHY ICs rated for ≤36 V absolute maximum. Use Value: Achieves 41.5 V clamping at 14.5 A, enabling coordination with upstream protectors to maintain total protective margin below 33 V logic thresholds. |
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 VWM (25.6 V), identical SMB package, but rated for 400 W PPPM and not AEC-Q101 qualified. | Lacks automotive qualification; suitable for commercial/industrial use only where AEC-Q101 is not mandated. | Select SMAJ30A for cost-sensitive non-automotive designs requiring same footprint but lower surge rating. |
| SMCJ30A | Higher PPPM (1500 W), larger SMC (DO-214AB) package, same VWM and clamping voltage. | Requires PCB layout change due to larger 7.11 mm × 6.22 mm footprint; used where higher surge energy must be absorbed. | Choose SMCJ30A when system-level surge tests exceed 600 W, accepting larger board area and different thermal profile. |
Compared with SMAJ30A and SMCJ30A, SM6T30AHM3/H delivers AEC-Q101 assurance in the smallest SMB form factor with 600 W capability-making it optimal for space-constrained automotive modules where qualification and moderate surge handling are both required.
Availability
SM6T30AHM3/H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, consumer USB power protection, and telecom line card surge suppression requiring stable component supply across production lifecycles.
Supply support for SM6T30AHM3/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 protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SM6T Series is engineered for board-level transient suppression in harsh environments, targeting automotive, industrial, and communications systems where consistent clamping performance and qualification-grade reliability are mandatory.
FAQ
What is the polarity configuration of SM6T30AHM3/H?
The SM6T30AHM3/H is a unidirectional TVS diode, with the cathode identified by a band on the SMB package body. This configuration allows it to conduct only during reverse overvoltage events on the protected line, making it ideal for DC power rail protection where polarity is fixed. The anode connects to ground, and the cathode connects to the line being protected-ensuring correct orientation during PCB assembly and preventing forward conduction during normal operation.
Is SM6T30AHM3/H qualified for automotive applications?
Yes, SM6T30AHM3/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" (halogen-free, RoHS-compliant, and AEC-Q101 qualified). This qualification covers stress tests including temperature cycling, humidity bias HAST, and mechanical shock-validating its suitability for under-hood and cabin-mounted automotive electronics such as body control modules and infotainment power supplies.
What is the maximum clamping voltage of SM6T30AHM3/H under standard surge conditions?
The SM6T30AHM3/H has a maximum clamping voltage (VC) of 41.5 V at 14.5 A peak pulse current using the industry-standard 10/1000 μs double-exponential waveform. This value is measured per Figure 1 in Vishay document 88385 and represents the upper voltage limit imposed on protected circuitry during worst-case surge events, directly informing system-level voltage margin design.
Does SM6T30AHM3/H meet halogen-free and RoHS requirements?
Yes, SM6T30AHM3/H meets both halogen-free and RoHS compliance standards, as indicated by the "HM3" suffix in its part number. Vishay specifies that HM3 devices use molding compounds free of brominated flame retardants and comply with EU Directive 2011/65/EU, making them acceptable for global OEM supply chains with strict environmental material declarations.
How does the thermal performance of SM6T30AHM3/H affect PCB layout?
The SM6T30AHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal. To maintain safe operation at full 600 W surge rating, designers must allocate adequate copper area and consider thermal vias beneath the SMB footprint. Reducing pad size or omitting thermal relief increases junction temperature, potentially derating peak pulse capability per Figure 2 in the datasheet.
SM6T30AHM3/H 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/H FAQ
1.How can I place an order for SM6T30AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T30AHM3/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 SM6T30AHM3/H reliable?
The price and inventory of SM6T30AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T30AHM3/H is usually 5 days.
3.What payment methods are accepted for SM6T30AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T30AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T30AHM3/H?
SM6T30AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T30AHM3/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 SM6T30AHM3/H?
For technical support, including SM6T30AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T30AHM3/H requirements.
6.How does Aetrix verify that SM6T30AHM3/H is sourced from the original manufacturer or authorized distributors?
All SM6T30AHM3/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 SM6T30AHM3/H meets industry standards.
7.What is the process for return or replacement of SM6T30AHM3/H?
All SM6T30AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SM6T30AHM3/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 SM6T30AHM3/H part is unused and in its original packaging.
Return procedure for SM6T30AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T30AHM3/H Tags
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