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Vishay General Semiconductor - Diodes Division SM6T24CAHE3_A/I
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- Part No.:
- SM6T24CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T24CAHE3_A/I.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,260
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Product details
Overview
SM6T24CAHE3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 24 V standoff voltage (VWM), 33.2 V max clamping voltage at 18 A peak pulse current, and 600 W peak pulse power with 10/1000 μs waveform. It provides robust ESD and surge protection for automotive sensor signal lines, power rails, and I/O interfaces.
For engineers reviewing the SM6T24CAHE3_A/I datasheet, SM6T24CAHE3_A/I pinout, SM6T24CAHE3_A/I application, or SM6T24CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (1.38), RoHS-compliant matte tin terminals, and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This device operates as a voltage-clamped shunt protector: during transients exceeding its breakdown voltage (22.8–25.2 V), it avalanches to divert surge current away from downstream circuitry while maintaining clamping voltage ≤33.2 V at 18 A. Its bidirectional symmetry ensures identical protection in both polarities without polarity marking.
Designed for automotive-grade reliability, SM6T24CAHE3_A/I features glass-passivated junction, meets MSL Level 1 per J-STD-020 (260 °C reflow peak), and supports operating junction temperatures from –65 °C to +150 °C. Thermal resistance is 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead) under specified mounting conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 20.5 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 22.8–25.2 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during overvoltage events |
| VC (Clamping Voltage) | 33.2 V at 18 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge; enables downstream IC survival |
| PPPM (Peak Pulse Power) | 600 W - Sustains high-energy transients like ISO 7637-2 pulse 1/2a/5a without failure |
| Package | SMB (DO-214AA) - Industry-standard surface-mount outline; 0.220" × 0.130" footprint with 0.060" lead pitch |
| AEC-Q101 Qualified | Yes - Validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT |
| RoHS & Halogen-Free Status | Rohs-compliant (HE3 suffix); not halogen-free - meets EU RoHS Directive 2011/65/EU, excludes brominated flame retardants |
Pinout & Package
SM6T24CAHE3_A/I uses an SMB (DO-214AA) surface-mount package with two terminals: no polarity marking for bidirectional operation. The case is molded compound rated UL 94 V-0; leads are matte tin plated, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; common node in bidirectional clamping | Connects to protected line; symmetric with cathode for AC-coupled or floating signal paths |
| Cathode | Current exit point in forward bias; common node in bidirectional clamping | Connects to protected line; functionally identical to anode due to bidirectional construction |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., CAN, LIN), and ungrounded power domains without polarity concerns |
| 600 W peak pulse power | Withstands ISO 16750-2 load dump surges and ISO 7637-2 coupled transients in 12 V automotive systems |
| AEC-Q101 qualification | Validates reliability for under-hood and body-control module applications requiring >15-year field life |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes voltage overshoot during clamping-critical for protecting 3.3 V/5 V logic and analog front-ends |
| MSL Level 1 rating | Allows unlimited floor life and single-reflow processing at 260 °C peak, simplifying manufacturing flow |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine control units exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Shunt TVS diode placed across sensor supply and ground, clamping transients before they reach precision ADC inputs. Use Value: Prevents sensor signal corruption and microcontroller reset events caused by 100 V/500 ms load dump pulses. | Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers interfacing with solenoids and contactors. IC Role / Device Role / Timing Role: Bidirectional clamp between input terminal and common rail, absorbing reverse-polarity miswiring and relay coil flyback energy. Use Value: Eliminates need for separate polarity-reversal protection diodes and reduces component count per channel. |
| Automotive Body Electronics | Telecom Interface Protection |
Use Scenario: Shielding LIN bus transceivers and door module microcontrollers from battery disconnect transients and ESD events. IC Role / Device Role / Timing Role: Low-capacitance TVS placed directly at connector entry point, suppressing fast-rising ESD (IEC 61000-4-2) and slow surges (ISO 7637-3). Use Value: Maintains LIN signal integrity (≤1 kbps) with <10 pF junction capacitance while meeting AEC-Q101 lifetime requirements. | Use Scenario: Protecting RS-485 transceiver pins in base station remote radio units subjected to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary-level surge suppressor mounted at board edge, limiting induced common-mode voltages to safe levels before differential receiver stage. Use Value: Enables compliance with ITU-T K.20/21 secondary protection coordination when paired with GDT or MOV upstream. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24CA | Same VWM (24 V), lower PPPM (400 W), SMA package (smaller thermal mass) | Limited to lower-energy transients; unsuitable for ISO 7637-2 pulse 5a | Select when space-constrained and surge energy is ≤400 W; verify thermal derating at TJ > 25 °C |
| SMCJ24CA | Same VWM (24 V), higher PPPM (1500 W), larger SMC package | Overqualified for most automotive sensor nodes; requires larger PCB area and higher cost | Choose only when system-level testing demands >600 W immunity or extended lifetime under repeated surges |
Compared with SMAJ24CA and SMCJ24CA, SM6T24CAHE3_A/I delivers optimal balance of 600 W surge handling, AEC-Q101 qualification, and SMB footprint-making it the preferred choice for cost-sensitive, volume automotive and industrial modules where validated reliability and manufacturability are critical.
Availability
SM6T24CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, body control units, and telecom interface protection requiring stable component supply, AEC-Q101 validation, and RoHS compliance.
Supply support for SM6T24CAHE3_A/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 high-reliability, automotive-qualified components.
The SM6T Series is designed specifically for robust transient suppression in automotive and industrial environments, combining high-power surge capability with stringent qualification standards and surface-mount manufacturability.
FAQ
What is the clamping voltage of SM6T24CAHE3_A/I at 18 A peak pulse current?
The SM6T24CAHE3_A/I has a maximum clamping voltage (VC) of 33.2 V when subjected to an 18 A peak pulse current with a 10/1000 μs waveform. This value is measured per Figure 1 in the Vishay datasheet 88385 and represents the upper limit of voltage imposed on protected circuitry during standardized surge events. The SM6T24CAHE3_A/I maintains this clamping performance across its qualified temperature range and after multiple surge cycles.
Is SM6T24CAHE3_A/I suitable for automotive applications?
Yes, SM6T24CAHE3_A/I is explicitly AEC-Q101 qualified, as indicated by the "HE3" suffix and confirmed in Vishay's ordering information table. It undergoes stress testing including high-temperature reverse bias, temperature cycling, and unbiased highly accelerated stress testing. The SM6T24CAHE3_A/I is approved for use in engine control units, body electronics, and ADAS sensor modules where automotive-grade reliability is mandatory.
What does the "CA" suffix mean in SM6T24CAHE3_A/I?
The "CA" suffix in SM6T24CAHE3_A/I denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SM6T24A), the SM6T24CAHE3_A/I has no cathode marking and functions identically regardless of applied polarity-essential for protecting AC-coupled lines, differential buses, or floating grounds.
What is the thermal resistance of SM6T24CAHE3_A/I?
The SM6T24CAHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and a junction-to-lead thermal resistance (RθJL) of 20 °C/W, measured under standard conditions: 0.2" × 0.2" copper pads per terminal. These values assume proper PCB layout per Vishay's recommended mounting pad dimensions and are critical for calculating safe power dissipation limits at elevated ambient temperatures.
Does SM6T24CAHE3_A/I meet RoHS requirements?
Yes, SM6T24CAHE3_A/I is RoHS-compliant, as confirmed by the "HE3" suffix per Vishay's ordering nomenclature. It meets EU Directive 2011/65/EU and contains no restricted substances above threshold limits. However, it is not halogen-free-the "HM3" suffix would indicate halogen-free construction, which SM6T24CAHE3_A/I does not carry.
SM6T24CAHE3_A/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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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 (SMBJ)
SM6T24CAHE3_A/I FAQ
1.How can I place an order for SM6T24CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T24CAHE3_A/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 SM6T24CAHE3_A/I reliable?
The price and inventory of SM6T24CAHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T24CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SM6T24CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T24CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T24CAHE3_A/I?
SM6T24CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T24CAHE3_A/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 SM6T24CAHE3_A/I?
For technical support, including SM6T24CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T24CAHE3_A/I requirements.
6.How does Aetrix verify that SM6T24CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SM6T24CAHE3_A/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 SM6T24CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SM6T24CAHE3_A/I?
All SM6T24CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T24CAHE3_A/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 SM6T24CAHE3_A/I part is unused and in its original packaging.
Return procedure for SM6T24CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T24CAHE3_A/I Tags
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