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Vishay General Semiconductor - Diodes Division SM6T24AHM3_B/I
- Part No.:
- SM6T24AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T24AHM3_B/I.pdf
- Description:
- 600W,24V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,684
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Product details
Overview
SM6T24AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount TRANSZORB® transient voltage suppressor in SMB (DO-214AA) package, with 24 V breakdown voltage (VBR = 22.8–25.2 V at 1 mA), 33.2 V clamping voltage (VC) at 18 A peak pulse current, and 600 W peak pulse power rating per 10/1000 μs waveform. It protects MOSFETs and sensor signal lines in automotive ECUs against inductive switching transients.
For engineers reviewing the SM6T24AHM3_B/I datasheet, SM6T24AHM3_B/I pinout, SM6T24AHM3_B/I application, or SM6T24AHM3_B/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, 20.5 V stand-off voltage (VWM), 1 μA max reverse leakage at VWM, and halogen-free RoHS-compliant construction.
Technical Context
The SM6T24AHM3_B/I operates as a clamping-type TVS diode, leveraging a glass-passivated silicon junction to deliver fast response (<1 ns) to voltage surges. Its unidirectional configuration provides forward conduction path during overvoltage events while blocking reverse current below VWM = 20.5 V.
Designed for PCB-level surge protection, it meets J-STD-020 MSL Level 1 (260 °C reflow peak), supports automated placement, and achieves low-inductance performance due to SMB package geometry and internal leadframe design. Thermal resistance is RθJA = 100 °C/W (typ.) on 5.0 mm × 5.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 22.8 V / 25.2 V at IT = 1 mA - defines reliable avalanche initiation range under standardized test conditions |
| VWM | 20.5 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 33.2 V at 18 A (10/1000 μs) - clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 600 W - peak transient power handling capability without failure under standard waveform |
| ID @ VWM | ≤1 μA - ensures negligible standby power loss and signal integrity in high-impedance circuits |
| TJ max | +150 °C - enables operation in under-hood automotive environments and industrial enclosures |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, matte tin-plated leads. Cathode indicated by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance reference; completes clamping loop during transient |
| Cathode | Reverse-biased terminal / Protected line connection | Connected to line being protected (e.g., sensor VCC or signal); blocks normal operation, conducts during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges without derating |
| Glass passivated chip junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| MSL Level 1 (260 °C) | Supports single-reflow assembly without popcorn cracking or delamination risk |
| AEC-Q101 qualified (HM3 suffix) | Validates suitability for automotive powertrain, chassis, and ADAS modules requiring zero-failure field performance |
| Low inductance SMB layout | Minimizes VL = L·di/dt overshoot during fast-rising transients (e.g., load dump, relay bounce) |
Applications
| Automotive Body Control Module | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and microcontroller I/O pins from load-dump-induced transients in door module ECUs. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between LIN line and ground, triggered within nanoseconds of overvoltage event. Use Value: Limits voltage to ≤33.2 V during 18 A surge, preventing latch-up or gate oxide damage in 5 V tolerant transceivers. | Use Scenario: Safeguarding analog output (4–20 mA) transmitter circuitry from field wiring faults and electrostatic discharge in factory automation systems. IC Role / Device Role / Timing Role: Standoff-mode protector across supply rail and signal path, conducting only during >20.5 V excursions. Use Value: Maintains <1 μA leakage at 20.5 V, preserving loop accuracy while clamping 600 W surges without degradation. |
| Automotive Power Seat Motor Driver | Consumer Appliance Motor Control Board |
Use Scenario: Suppressing inductive kickback from brushed DC seat motor H-bridge outputs during PWM commutation. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals to clamp flyback spikes before reaching driver ICs. Use Value: Withstands 100 A non-repetitive forward surge (IFSM) and dissipates energy without thermal runaway at TJ ≤ 150 °C. | Use Scenario: Shielding MCU GPIOs and optocoupler inputs from ESD events during user interface button actuation in smart washing machines. IC Role / Device Role / Timing Role: Low-capacitance unidirectional suppressor placed at board edge connectors feeding front-panel controls. Use Value: Halogen-free, RoHS-compliant construction meets global regulatory requirements for white goods, with verified AEC-Q101 stress screening. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A-E3/5B | Same VBR range (22.8–25.2 V), but lower PPPM = 400 W; SMA package (DO-214AC), slightly larger footprint | Not AEC-Q101 qualified; suitable for commercial/industrial use only | Select when cost sensitivity outweighs automotive qualification and 600 W margin is unnecessary |
| SMCJ24A-H | Higher PPPM = 1500 W; SMC package (DO-214AB), larger size and higher thermal mass | Overqualified for typical 24 V system surges; requires more PCB area and may increase layout inductance | Choose only if system-level testing confirms need for >600 W surge immunity or extended lifetime under repetitive stress |
Compared with SMAJ24A-E3/5B and SMCJ24A-H, the SM6T24AHM3_B/I delivers optimal balance of AEC-Q101 compliance, 600 W surge capacity, and compact SMB footprint-making it ideal for space-constrained automotive modules where qualification and reliability are mandatory.
Availability
SM6T24AHM3_B/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and consumer appliance motor controllers requiring stable component supply and full traceability.
Supply support for SM6T24AHM3_B/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, TVS devices, and power MOSFETs with emphasis on reliability and application-specific optimization.
The SM6T Series was developed to provide AEC-Q101-qualified, surface-mount transient suppression for 12 V and 24 V automotive systems, balancing high surge capability, low leakage, and automated assembly compatibility.
FAQ
What is the clamping voltage of SM6T24AHM3_B/I at its rated peak pulse current?
The SM6T24AHM3_B/I has a maximum clamping voltage (VC) of 33.2 V when subjected to its rated peak pulse current of 18 A under the standard 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88385 and defines the upper voltage limit imposed on protected circuitry during surge events. The SM6T24AHM3_B/I maintains this clamping performance across its qualified operating temperature range.
Is SM6T24AHM3_B/I suitable for automotive applications?
Yes, SM6T24AHM3_B/I is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's SM6T series datasheet (Rev. 09-Jan-2024, Doc. #88385). It is specifically designed for automotive use cases including body electronics, powertrain sensors, and infotainment interfaces. The SM6T24AHM3_B/I meets stringent reliability requirements including temperature cycling, highly accelerated life testing, and ESD robustness.
What does the "HM3" suffix indicate in SM6T24AHM3_B/I?
The "HM3" suffix in SM6T24AHM3_B/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Per Vishay's ordering information table, HM3 parts meet JESD201 Class 2 whisker resistance and are intended for automotive-grade applications. The "B/I" further specifies packaging: 13-inch tape-and-reel (I) with 3200-unit quantity and revision code B. This distinguishes SM6T24AHM3_B/I from commercial-grade M3 or E3 variants.
How does SM6T24AHM3_B/I differ from bidirectional TVS diodes like SM6T24CA?
The SM6T24AHM3_B/I is unidirectional and functions as a polarity-sensitive clamp-blocking reverse current up to 20.5 V (VWM) and conducting only during positive overvoltage on the cathode. In contrast, SM6T24CA is bidirectional with symmetrical clamping in both directions and no polarity marking. The SM6T24AHM3_B/I is selected for DC supply rail protection where polarity is fixed; SM6T24CA suits AC or differential signal lines.
What is the maximum operating junction temperature for SM6T24AHM3_B/I?
The SM6T24AHM3_B/I has a maximum operating junction temperature (TJ) of +150 °C, as specified in the Absolute Maximum Ratings table of Vishay document 88385. This rating enables deployment in under-hood automotive environments and enclosed industrial enclosures. Derating curves in Figure 2 show that peak pulse power must be reduced above 25 °C ambient to maintain safe TJ limits, with SM6T24AHM3_B/I retaining ≥50 % of 600 W capability at 75 °C ambient on recommended pad layout.
SM6T24AHM3_B/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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 20.5V
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 33.2V
- Current - Peak Pulse (10/1000µs):
- 18A
- 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)
SM6T24AHM3_B/I FAQ
1.How can I place an order for SM6T24AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T24AHM3_B/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 SM6T24AHM3_B/I reliable?
The price and inventory of SM6T24AHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T24AHM3_B/I is usually 5 days.
3.What payment methods are accepted for SM6T24AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T24AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T24AHM3_B/I?
SM6T24AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T24AHM3_B/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 SM6T24AHM3_B/I?
For technical support, including SM6T24AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T24AHM3_B/I requirements.
6.How does Aetrix verify that SM6T24AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SM6T24AHM3_B/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 SM6T24AHM3_B/I meets industry standards.
7.What is the process for return or replacement of SM6T24AHM3_B/I?
All SM6T24AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T24AHM3_B/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 SM6T24AHM3_B/I part is unused and in its original packaging.
Return procedure for SM6T24AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T24AHM3_B/I Tags
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