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Vishay General Semiconductor - Diodes Division SM6T24CAHM3_A/H
- Part No.:
- SM6T24CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T24CAHM3_A/H.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,776
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Product details
Overview
SM6T24CAHM3_A/H 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 A peak pulse current. It provides robust ESD and surge protection for automotive sensor signal lines, industrial I/O interfaces, and power supply rails.
For engineers reviewing the SM6T24CAHM3_A/H datasheet, SM6T24CAHM3_A/H pinout, SM6T24CAHM3_A/H application, or SM6T24CAHM3_A/H equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification, halogen-free RoHS compliance, low clamping ratio (1.38×VWM), and thermal resistance of 100 °C/W junction-to-ambient.
Technical Context
This device operates as a voltage-clamped shunt protector with symmetrical breakdown in both polarities, enabling suppression of positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable leakage (<1 μA at 20.5 V) and repeatable clamping performance across temperature.
Designed for surface-mount automated assembly on standard PCB pads (0.2" × 0.2"), it delivers 600 W surge handling per JEDEC-defined 10/1000 μs waveform while maintaining MSL Level 1 moisture sensitivity and 260 °C lead-free reflow compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20.5 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 22.8 V / 25.2 V - Breakdown occurs within this range at 1 mA test current, ensuring predictable turn-on |
| VC @ IPPM | 33.2 V at 18 A - Clamping voltage during 10/1000 μs surge, limiting downstream voltage stress |
| PPPM | 600 W - Peak pulse power dissipation capability under standardized surge waveform |
| TJ max. | +150 °C - Maximum junction temperature rating supports operation in under-hood automotive environments |
| RθJA | 100 °C/W - Thermal resistance enables thermal design with minimal copper area (0.2" × 0.2" pads) |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (negative polarity) | Conducts during negative surges; symmetric with cathode for bidirectional operation |
| Cathode | Transient current entry point (positive polarity) | Conducts during positive surges; electrically identical to anode in CA-series devices |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) when properly mounted |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, ADAS sensors, and body electronics |
| Halogen-free & RoHS-compliant | Meets global environmental regulations and supports lead-free reflow soldering up to 260 °C |
| Low clamping ratio (VC/VWM = 1.38) | Minimizes overvoltage exposure to protected ICs compared to higher-ratio TVS devices |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Shunt clamping element placed directly at connector or IC input pins to divert surge energy to ground before reaching sensitive circuitry. Use Value: Prevents latch-up or permanent damage to microcontrollers and analog front-ends during ISO 7637-2 Pulse 1/2a/5a events. | Use Scenario: Safeguarding digital input modules in programmable logic controllers against field-wiring induced surges from solenoid coils and motor drives. IC Role / Device Role / Timing Role: Fast-response voltage clamp on 24 V DC input channels, operating within <1 ns response time to limit transient overshoot. Use Value: Eliminates need for external series impedance or RC filtering while maintaining signal integrity for 1–10 kHz digital signals. |
| Telecom Line Interface | Consumer Power Supply Input |
Use Scenario: Transient suppression on Ethernet PHY interface lines (e.g., MDI-X pairs) exposed to lightning-induced surges in outdoor telecom equipment. IC Role / Device Role / Timing Role: Bidirectional clamping device placed between transformer center-taps and PHY IC, referenced to chassis ground. Use Value: Maintains signal symmetry and common-mode rejection while meeting IEC 61000-4-5 10/700 μs surge immunity requirements. | Use Scenario: Secondary-side overvoltage protection on 5–24 V DC output rails of wall adapters and USB PD power supplies. IC Role / Device Role / Timing Role: Standby-mode protector that remains non-conductive until output rail exceeds 20.5 V due to feedback loop failure or rectifier fault. Use Value: Prevents catastrophic failure of downstream USB-C ports or battery charging circuits during overvoltage faults. |
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 SMB package, 600 W rating, but VWM = 20.5 V and VC = 38.9 V - higher clamping voltage than SM6T24CAHM3_A/H's 33.2 V | Less effective for low-voltage ICs requiring tighter clamping margin; suitable where board space allows higher VC | Select SMAJ24CA only if layout constraints require same footprint but clamping margin permits higher VC |
| SMCJ24CA | Higher power rating (1500 W), larger SMC (DO-214AB) package, same VWM/VC specs - physically incompatible with SMB footprints | Used in high-energy surge zones (e.g., main power inputs); not drop-in replaceable due to size and pad layout | Choose SMCJ24CA when system-level surge testing requires >600 W capability and board redesign is acceptable |
Compared with SMAJ24CA and SMCJ24CA, SM6T24CAHM3_A/H offers the lowest clamping voltage in SMB form factor and AEC-Q101 qualification - making it optimal for space-constrained automotive and industrial signal-line protection where precise voltage limiting is critical.
Availability
SM6T24CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line interfaces, and consumer power supply inputs requiring stable component supply and long-term lifecycle support.
Supply support for SM6T24CAHM3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SM6T Series is engineered for high-reliability transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where compact size, AEC-Q101 validation, and consistent clamping behavior are mandatory.
FAQ
What does the "CA" suffix indicate in SM6T24CAHM3_A/H?
The "CA" suffix in SM6T24CAHM3_A/H denotes a bidirectional configuration, meaning the device provides symmetrical transient voltage suppression for both positive and negative polarity surges. Unlike unidirectional variants (e.g., SM6T24A), SM6T24CAHM3_A/H has no cathode marking and functions identically in either direction - essential for protecting AC-coupled or floating signal paths such as CAN bus lines or differential sensor outputs.
Is SM6T24CAHM3_A/H qualified for automotive use?
Yes, SM6T24CAHM3_A/H is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's SM6T datasheet (Rev. 09-Jan-2024). This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, validating its suitability for under-hood and cabin-mounted automotive electronics such as engine control modules, ADAS camera interfaces, and body control units.
What is the clamping voltage of SM6T24CAHM3_A/H at its rated peak pulse current?
The clamping voltage (VC) of SM6T24CAHM3_A/H is 33.2 V at 18 A peak pulse current under the standard 10/1000 μs waveform. This value is measured per Figure 1 in the Vishay SM6T datasheet and reflects the maximum voltage seen across the device during surge conduction - a critical parameter for ensuring protected ICs remain below their absolute maximum ratings during transient events.
How does the HM3 suffix differ from E3 or M3 in SM6T24CAHM3_A/H?
The HM3 suffix in SM6T24CAHM3_A/H indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification - distinguishing it from E3 (RoHS-compliant commercial grade) and M3 (halogen-free RoHS-compliant commercial grade). The "H" prefix explicitly confirms automotive qualification, while "M3" confirms halogen-free molding compound and matte tin plating compliant with J-STD-002 solderability standards.
Can SM6T24CAHM3_A/H be used in place of SM6T24A on the same PCB?
No, SM6T24CAHM3_A/H cannot be directly substituted for SM6T24A without verification, because SM6T24A is unidirectional (cathode-marked) while SM6T24CAHM3_A/H is bidirectional (no polarity marking). Although both share the SMB package and similar electrical specs, using the bidirectional version in a unidirectional circuit may cause unintended conduction during forward-biased conditions - especially in DC power rail applications where polarity matters.
SM6T24CAHM3_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:
- -
- 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 (SMB)
SM6T24CAHM3_A/H FAQ
1.How can I place an order for SM6T24CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T24CAHM3_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 SM6T24CAHM3_A/H reliable?
The price and inventory of SM6T24CAHM3_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 SM6T24CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SM6T24CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T24CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T24CAHM3_A/H?
SM6T24CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T24CAHM3_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 SM6T24CAHM3_A/H?
For technical support, including SM6T24CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T24CAHM3_A/H requirements.
6.How does Aetrix verify that SM6T24CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SM6T24CAHM3_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 SM6T24CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SM6T24CAHM3_A/H?
All SM6T24CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SM6T24CAHM3_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 SM6T24CAHM3_A/H part is unused and in its original packaging.
Return procedure for SM6T24CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T24CAHM3_A/H Tags
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