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Vishay General Semiconductor - Diodes Division SM6T24CA-M3/5B
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- Part No.:
- SM6T24CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T24CA-M3/5B.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,964
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Product details
Overview
SM6T24CA-M3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 600 W peak pulse power (10/1000 μs), 24 V standoff voltage (VWM), and clamping voltage of 33.2 V at 18.0 A peak pulse current - used to protect MOSFETs, sensor signal lines, and ICs in automotive and industrial power electronics.
For engineers reviewing the SM6T24CA-M3/5B datasheet, SM6T24CA-M3/5B pinout, SM6T24CA-M3/5B application, or SM6T24CA-M3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification eligibility (via HM3 suffix), halogen-free RoHS compliance, low-inductance SMB package, and verified 150 °C junction temperature rating.
Technical Context
The SM6T24CA-M3/5B operates as a symmetrical bidirectional TVS, with identical breakdown (VBR = 26.7–29.5 V at 1 mA) and clamping behavior in both polarities. Its glass-passivated junction ensures stable leakage (<1 μA at 20.5 V) and robust surge handling under repetitive transients.
Designed for surface-mount placement on PCBs with minimum 5.0 mm × 5.0 mm copper pads per terminal, it delivers low thermal resistance (RθJA = 100 °C/W) and meets J-STD-020 MSL Level 1 (260 °C reflow peak), supporting automated high-volume assembly without derating concerns below 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20.5 V - maximum reverse stand-off voltage before clamping begins; defines safe operating window for protected circuitry |
| VBR (min/max) | 26.7 V / 29.5 V at 1 mA - guaranteed symmetric breakdown threshold in both directions |
| VC @ IPPM | 33.2 V at 18.0 A (10/1000 μs) - clamping voltage limits transient energy delivered to downstream components |
| PPPM | 600 W - peak pulse power handling capacity under standardized lightning-surge waveform |
| TJ max. | +150 °C - maximum junction temperature enables operation in under-hood automotive environments |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 2.20 mm height and 5.59 mm length |
Pinout & Package
SMB (DO-214AA) package: molded plastic case with matte tin-plated leads, UL 94 V-0 flammability rating, and no polarity marking (bidirectional device).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | No functional distinction - terminals interchangeable; conducts equally during positive or negative overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-to-earth) when properly mounted |
| Halogen-free & RoHS-compliant (M3) | Meets environmental compliance requirements for automotive and industrial end equipment |
| Low inductance layout | Minimizes voltage overshoot during fast transients (e.g., ESD, inductive switching) due to compact SMB geometry |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and jump-start transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed directly at connector interface to shunt surge energy before reaching signal conditioning ICs. Use Value: Maintains signal integrity by limiting transient voltage to ≤33.2 V while surviving repeated 600 W pulses per ISO 7637-2 Pulse 5a. | Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to relay coil flyback and motor drive noise in factory automation. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC input channels, coordinated with series impedance to limit let-through energy. Use Value: Prevents latch-up or permanent damage to microcontroller GPIOs by clamping transients within 1 ns response time and holding VC < 33.2 V. |
| Consumer Power Adapter Surge Suppression | Telecom Line Interface Protection |
Use Scenario: Secondary-side transient suppression in AC/DC adapters for smart home devices subjected to mains-borne surges and EFT bursts. IC Role / Device Role / Timing Role: Final-stage TVS across DC output rails (e.g., 5 V, 12 V) to protect downstream USB-PD controllers and PMICs. Use Value: Ensures adapter compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) by clamping with <100 ps response and low leakage (<1 μA). | Use Scenario: Protection of Ethernet PHY interfaces and DSL line drivers against induced lightning surges and AC power cross-talk in residential gateways. IC Role / Device Role / Timing Role: Common-mode TVS on differential pairs, leveraging bidirectional symmetry to handle polarity-agnostic line faults. Use Value: Enables robust 10/1000 μs surge immunity up to 600 W without requiring external polarity management circuitry. |
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 | 400 W PPPM, SMA package (higher RθJA = 140 °C/W), same VWM/VC specs | Limited to lower-energy transients; less suitable for automotive load-dump where 600 W margin is required | Select SMAJ24CA only if board space is constrained and surge threat level is ≤IEC 61000-4-5 Level 3 |
| SMCJ24CA | 1500 W PPPM, SMC package (larger footprint), higher IPPM (123 A), same VWM/VC | Over-specified for most sensor-level protection; better suited for main power rail or DC bus clamping | Choose SMCJ24CA when protecting 48 V systems or where sustained surge repetition demands higher thermal mass |
Compared with SMAJ24CA and SMCJ24CA, the SM6T24CA-M3/5B delivers optimal balance of 600 W surge capacity, SMB footprint compatibility, and halogen-free compliance - making it preferred for cost-sensitive, space-constrained automotive and industrial sensor nodes requiring AEC-Q101-eligible variants.
Availability
SM6T24CA-M3/5B is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, consumer power adapters, and telecom line interfaces requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SM6T24CA-M3/5B 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, power efficiency, and automotive-grade qualification.
The SM6T Series is engineered specifically for robust transient suppression in harsh environments - targeting design-in for automotive electronics, industrial controls, and communication infrastructure where bidirectional clamping, high surge tolerance, and process consistency are critical.
FAQ
What is the clamping voltage of the SM6T24CA-M3/5B under standard test conditions?
The SM6T24CA-M3/5B has a maximum clamping voltage (VC) of 33.2 V when subjected to a 10/1000 μs waveform at 18.0 A peak pulse current. This value is measured across the device terminals during transient events and defines the upper voltage limit imposed on protected circuitry - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the SM6T24CA-M3/5B suitable for automotive applications?
Yes, the SM6T24CA-M3/5B is qualified for automotive use when ordered with the HM3 suffix (e.g., SM6T24CAHM3_B/I), which denotes AEC-Q101 qualification. The base SM6T24CA-M3/5B shares identical electrical and thermal specifications, including 150 °C TJ max and MSL Level 1 reflow compatibility, enabling drop-in use in automotive designs pending final qualification documentation.
How does the bidirectional nature of the SM6T24CA-M3/5B affect its circuit implementation?
The SM6T24CA-M3/5B has no polarity marking and conducts identically in both directions, allowing direct placement across AC-coupled lines, differential pairs, or floating rails without orientation concerns. This eliminates risk of incorrect installation and simplifies layout for protection of bidirectional interfaces such as RS-485, CAN, or audio lines - unlike unidirectional TVS diodes that require cathode alignment.
What is the thermal resistance of the SM6T24CA-M3/5B, and how does it impact PCB layout?
The SM6T24CA-M3/5B 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 junction temperatures under repeated surges, PCB layout must adhere to this pad size minimum - reducing RθJA further requires internal ground/power planes or thermal vias, but is not required for single-event compliance.
Does the SM6T24CA-M3/5B meet halogen-free and RoHS requirements?
Yes, the "M3" suffix in SM6T24CA-M3/5B explicitly indicates halogen-free, RoHS-compliant construction per JEDEC standards. The molding compound contains no brominated flame retardants, and terminals are matte tin-plated to meet J-STD-002 solderability and JESD22-B102 whisker resistance requirements - fully documented in Vishay's material declaration report #99912.
SM6T24CA-M3/5B 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:
- -
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SM6T24CA-M3/5B FAQ
1.How can I place an order for SM6T24CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T24CA-M3/5B 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 SM6T24CA-M3/5B reliable?
The price and inventory of SM6T24CA-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T24CA-M3/5B is usually 5 days.
3.What payment methods are accepted for SM6T24CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T24CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T24CA-M3/5B?
SM6T24CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T24CA-M3/5B 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 SM6T24CA-M3/5B?
For technical support, including SM6T24CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T24CA-M3/5B requirements.
6.How does Aetrix verify that SM6T24CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All SM6T24CA-M3/5B 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 SM6T24CA-M3/5B meets industry standards.
7.What is the process for return or replacement of SM6T24CA-M3/5B?
All SM6T24CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SM6T24CA-M3/5B, 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 SM6T24CA-M3/5B part is unused and in its original packaging.
Return procedure for SM6T24CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T24CA-M3/5B Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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