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Vishay General Semiconductor - Diodes Division SM6T24AHM3_A/H
- Part No.:
- SM6T24AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T24AHM3_A/H.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,097
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Product details
Overview
SM6T24AHM3_A/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 24 V standoff voltage (VWM = 20.5 V), 33.2 V clamping voltage at 18 A peak pulse current, and 600 W peak pulse power with 10/1000 μs waveform. It features glass passivated junction, AEC-Q101 qualification, and is used to protect automotive sensor signal lines from inductive switching transients.
For engineers reviewing the SM6T24AHM3_A/H datasheet, SM6T24AHM3_A/H pinout, SM6T24AHM3_A/H application, or SM6T24AHM3_A/H equivalent, key selection criteria include clamping performance under 10/1000 μs surge, unidirectional polarity with cathode band marking, AEC-Q101 qualification status, and SMB package thermal resistance (RθJA = 100 °C/W).
Technical Context
This TVS diode operates as a voltage-clamping protection device triggered by reverse-biased avalanche breakdown above its standoff voltage. Its low-inductance SMB package and glass-passivated junction ensure fast response (<1 ns) and stable clamping during ESD and lightning-induced surges.
The device sustains 100 A non-repetitive forward surge current (IFSM) and derates linearly above 25 °C ambient, with maximum junction temperature of 150 °C. Thermal resistance from junction to ambient is 100 °C/W on standard 5.0 mm × 5.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20.5 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 22.8 V / 25.2 V - Breakdown voltage range at 1 mA test current; defines turn-on threshold consistency |
| VC @ IPPM | 33.2 V at 18 A - Clamped voltage during 10/1000 μs surge; determines protected circuit's maximum overvoltage stress |
| PPPM | 600 W - Peak pulse power handling capability; validates robustness against IEC 61000-4-5 Level 4 surges |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard PCB pad layout; guides heatsinking requirements |
| TJ max. | +150 °C - Maximum allowable junction temperature; sets upper limit for ambient + power dissipation design margin |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Cathode indicated by black band on case end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode | Avalanche clamping terminal | Marked with band; connected to protected line (e.g., CAN_H, LIN, sensor output) to clamp positive transients |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables compliance with IEC 61000-4-5 surge immunity up to 4 kV (line-earth) in compact SMB footprint |
| Glass passivated chip junction | Ensures stable breakdown voltage over lifetime and improved humidity resistance vs. epoxy-passivated alternatives |
| MSL Level 1 (260 °C peak reflow) | Supports single-pass lead-free reflow assembly without popcorn cracking or delamination risk |
| AEC-Q101 qualified (HM3 suffix) | Validates suitability for automotive powertrain, body control, and ADAS sensor interfaces requiring zero-failure field reliability |
| Low inductance SMB package | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a/5a), improving clamping fidelity |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine control units exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamping positive transients on sensor supply or signal lines before they reach ADC inputs or op-amps. Use Value: Limits voltage excursion to ≤33.2 V during 18 A surge, preventing latch-up or permanent damage to 3.3 V/5 V signal chain components. | Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers subjected to inductive kickback from solenoid valves and contactors. IC Role / Device Role / Timing Role: Fast-acting shunt protector placed between input terminal and common rail to divert surge energy away from optocoupler input stages. Use Value: Withstands 100 A half-sine surge (IFSM), ensuring long-term reliability in high-noise factory environments without degradation. |
| Automotive LIN Bus Protection | Consumer Appliance Motor Control |
Use Scenario: Shielding LIN transceiver pins (LIN_H) in door modules and seat controllers from ESD and battery disconnect transients. IC Role / Device Role / Timing Role: Standoff-rated TVS (20.5 V) placed directly at connector interface to clamp transients before reaching LIN PHY layer. Use Value: Maintains bus integrity by clamping within 1 ns while preserving signal rise/fall times due to low package inductance. | Use Scenario: Protecting microcontroller GPIOs driving brushed DC motors in washing machines and HVAC blowers where back-EMF spikes exceed MCU voltage ratings. IC Role / Device Role / Timing Role: Unidirectional suppressor tied between motor driver output and ground to absorb inductive energy during PWM turn-off. Use Value: 600 W rating handles repetitive 10/1000 μs pulses typical of motor commutation, extending MCU lifespan in cost-sensitive white goods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A-E3/5B | Same VWM (20.5 V), identical SMB package, but not AEC-Q101 qualified; RθJA = 110 °C/W | Targeted at commercial/industrial use only; lacks automotive qualification testing and traceability | Select when AEC-Q101 is not required and cost sensitivity outweighs automotive reliability needs |
| SMCJ24A-HM3 | Higher PPPM (1500 W), same VWM and AEC-Q101 qualification, but larger SMC (DO-214AB) package (7.11 mm × 6.22 mm) | Used where higher surge margin is needed (e.g., front-end power inputs), but requires PCB area increase and layout revision | Select when system-level surge testing exceeds 600 W requirements and board space permits larger footprint |
Compared with SMAJ24A-E3/5B, SM6T24AHM3_A/H offers tighter thermal resistance and automotive qualification; compared with SMCJ24A-HM3, it trades peak power for smaller SMB footprint-ideal for space-constrained sensor nodes where 600 W suffices.
Availability
SM6T24AHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and consumer appliance motor drivers requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for SM6T24AHM3_A/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 designed specifically for robust transient voltage suppression in automotive and industrial environments, balancing high surge capability, compact SMB packaging, and AEC-Q101 qualification for mission-critical signal line protection.
FAQ
What is the clamping voltage of the SM6T24AHM3_A/H under a 10/1000 μs surge?
The SM6T24AHM3_A/H has a maximum clamping voltage (VC) of 33.2 V at 18 A peak pulse current with a 10/1000 μs waveform. This value is measured per Figure 1 in the official Vishay datasheet (Doc. #88385) and defines the upper voltage limit imposed on protected circuits during standardized surge events. The SM6T24AHM3_A/H maintains this clamping performance across its qualified operating temperature range.
Is the SM6T24AHM3_A/H suitable for automotive applications?
Yes, the SM6T24AHM3_A/H is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's SM6T series datasheet (Rev. 09-Jan-2024). It undergoes rigorous stress testing-including temperature cycling, high-temperature reverse bias, and ESD-to meet automotive reliability standards. The SM6T24AHM3_A/H is explicitly recommended for sensor units, LIN/CAN interfaces, and body electronics in passenger vehicles.
What does the "HM3" suffix indicate in SM6T24AHM3_A/H?
The "HM3" suffix in SM6T24AHM3_A/H denotes halogen-free, RoHS-compliant construction with full AEC-Q101 qualification. Per Vishay's ordering nomenclature, HM3 devices meet JESD201 Class 2 whisker resistance, MSL Level 1 reflow compatibility (260 °C peak), and automotive-grade reliability testing. The "_A/H" indicates revision level A and packaging in 7″ tape-and-reel (H code).
How does the SM6T24AHM3_A/H differ from bidirectional TVS diodes like SM6T24CA?
The SM6T24AHM3_A/H is unidirectional and features a cathode band for polarity identification, enabling protection only against positive transients relative to ground. In contrast, SM6T24CA is bidirectional with symmetric clamping in both directions and no polarity marking. The SM6T24AHM3_A/H is selected for DC-biased lines (e.g., 24 V sensor supplies), whereas SM6T24CA suits AC-coupled or floating signal paths like data buses.
What is the thermal resistance of the SM6T24AHM3_A/H, and how does it affect PCB layout?
The SM6T24AHM3_A/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, as specified in Vishay's datasheet. This value assumes minimum recommended pad layout; reducing pad size increases thermal resistance and risks exceeding the 150 °C max junction temperature during repeated surges. Layout must follow Vishay's SMB outline dimensions and copper area guidelines to maintain rated performance.
SM6T24AHM3_A/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:
- Obsolete
- 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:
- -
- 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_A/H FAQ
1.How can I place an order for SM6T24AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T24AHM3_A/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 SM6T24AHM3_A/H reliable?
The price and inventory of SM6T24AHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T24AHM3_A/H is usually 5 days.
3.What payment methods are accepted for SM6T24AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T24AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T24AHM3_A/H?
SM6T24AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T24AHM3_A/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 SM6T24AHM3_A/H?
For technical support, including SM6T24AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T24AHM3_A/H requirements.
6.How does Aetrix verify that SM6T24AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SM6T24AHM3_A/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 SM6T24AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SM6T24AHM3_A/H?
All SM6T24AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SM6T24AHM3_A/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 SM6T24AHM3_A/H part is unused and in its original packaging.
Return procedure for SM6T24AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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