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Vishay General Semiconductor - Diodes Division SM6T24CAHM3_A/I
- Part No.:
- SM6T24CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T24CAHM3_A/I.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,073
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Product details
Overview
SM6T24CAHM3_A/I from Vishay General Semiconductor is a bidirectional surface-mount TRANSZORB® transient voltage suppressor in SMB (DO-214AA) package, rated for 600 W peak pulse power (10/1000 μs), 24 V standoff voltage (VWM), 33.2 V max clamping voltage at 18 A IPPM, and -65 °C to +150 °C operating junction temperature. It protects signal lines and power rails in automotive sensor units and industrial control interfaces against inductive switching transients.
For engineers reviewing the SM6T24CAHM3_A/I datasheet, SM6T24CAHM3_A/I pinout, SM6T24CAHM3_A/I application, or SM6T24CAHM3_A/I equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, halogen-free RoHS compliance, SMB thermal resistance (RθJA = 100 °C/W), and verified clamping performance under 10/1000 μs surge conditions.
Technical Context
This bidirectional TVS diode operates with symmetrical breakdown characteristics in both polarities, delivering consistent clamping at ±24 V standoff and ±33.2 V maximum clamping voltage under 18 A peak pulse current. Its glass-passivated junction ensures stable leakage (<1 μA at VWM) and low inductance for fast transient response.
The device is qualified to AEC-Q101, uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and meets MSL level 1 (260 °C reflow peak). Thermal resistance from junction to ambient is 100 °C/W on standard 0.2" × 0.2" copper pads, enabling reliable operation up to 150 °C TJ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 22.8 V / 25.2 V - Breakdown occurs within this band at 1 mA test current; ensures predictable turn-on across production lot. |
| VC @ IPPM | 33.2 V at 18 A (10/1000 μs) - Clamping voltage during worst-case surge; limits downstream IC stress to ≤33.2 V. |
| PPPM | 600 W - Peak pulse power handling capability; supports robust protection against IEC 61000-4-5 Level 4 surges. |
| TJ max. | +150 °C - Maximum junction temperature rating; enables use in under-hood automotive and high-ambient industrial environments. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 2.2 mm height and 3.94 mm length; compatible with automated pick-and-place. |
| Compliance | AEC-Q101 qualified, halogen-free, RoHS-compliant - Meets automotive reliability and environmental requirements per ordering code HM3 suffix. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Cathode/anode terminals are functionally symmetric; device conducts identically in either direction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Provides low-impedance path to ground or rail during positive or negative transients; no fixed polarity reference. |
| Cathode | Transient return path (bidirectional) | Functionally identical to Anode; bidirectional symmetry eliminates orientation constraints during PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables single-device protection against severe transients per IEC 61000-4-5, reducing BOM count in CAN/LIN bus nodes. |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control modules, ADAS sensors, and body electronics. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets global environmental regulations without compromising thermal or electrical performance in high-reliability assemblies. |
| Low clamping ratio (VC/VWM = 1.38) | Minimizes overvoltage stress on protected ICs-critical for 3.3 V/5 V logic interfacing with 24 V supply domains. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard 260 °C reflow without baking, simplifying SMT manufacturing flow. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay environments subject to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between sensor signal line and ground to shunt transients before reaching ADC input. Use Value: Maintains signal integrity by limiting excursion to ≤33.2 V during 18 A surges, preventing ADC saturation or latch-up in AEC-Q100 Grade 2 systems. |
Use Scenario: Safeguarding 24 V digital input channels on programmable logic controller (PLC) modules exposed to relay coil flyback and field wiring ESD. IC Role / Device Role / Timing Role: Primary transient suppression element across input terminal pair, absorbing energy before it reaches optocoupler or Schmitt trigger input stage. Use Value: Withstands repeated 600 W surges without degradation, extending field service life beyond 10 years in factory automation settings. |
| Telecom Power Rail Protection | Consumer Appliance Motor Control |
Use Scenario: Clamping induced transients on 24 V DC power feeds to remote radio units and base station backhaul interfaces. IC Role / Device Role / Timing Role: Parallel-connected TVS on main power rail, activated within nanoseconds to divert surge current away from DC/DC converters and PMICs. Use Value: 100 °C/W RθJA enables stable operation at full power derating up to 70 °C ambient-critical for sealed telecom enclosures. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in smart washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Bidirectional clamp across motor terminals to contain inductive kickback during PWM switching transitions. Use Value: Symmetrical clamping prevents reverse-bias damage to H-bridge MOSFETs and reduces EMI generation by limiting dv/dt during turn-off. |
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 PPPM, but VWM = 24 V and VC = 38.9 V at 15.4 A; higher clamping voltage and lower surge current rating. | Lacks AEC-Q101 qualification; rated only for commercial temperature range (-55 °C to +150 °C, no automotive validation). | Select when AEC-Q101 is not required and higher clamping voltage is acceptable for less sensitive downstream circuitry. |
| 1.5KE24CA | Through-hole DO-201 package, same 24 V VWM and bidirectional operation, but 1500 W PPPM and VC = 38.9 V at 38.8 A; larger footprint and higher clamping. | Not suitable for space-constrained SMT designs; requires wave soldering or hand assembly; no MSL rating. | Choose for legacy through-hole systems or where higher surge energy absorption justifies board area and assembly complexity. |
Compared with SMAJ24CA and 1.5KE24CA, SM6T24CAHM3_A/I delivers tighter clamping (33.2 V vs. ≥38.9 V), AEC-Q101 qualification, and optimized SMT manufacturability-making it the preferred choice for new automotive and industrial designs requiring compact, validated, and process-ready TVS protection.
Availability
SM6T24CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O conditioning, and telecom power rail stabilization requiring stable component supply, long-term lifecycle support, and traceable halogen-free sourcing.
Supply support for SM6T24CAHM3_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 high-reliability diodes, rectifiers, and protection devices for automotive, industrial, and computing markets.
The SM6T Series was developed specifically for robust, surface-mount transient suppression in harsh environments-emphasizing AEC-Q101 qualification, low clamping ratios, and compatibility with high-volume automated assembly.
FAQ
What does the "HM3" suffix indicate in SM6T24CAHM3_A/I?
The HM3 suffix in SM6T24CAHM3_A/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It confirms compliance with automotive reliability standards, absence of brominated flame retardants, and suitability for high-reliability applications such as engine control and ADAS sensor interfaces.
Is SM6T24CAHM3_A/I unidirectional or bidirectional?
SM6T24CAHM3_A/I is a bidirectional transient voltage suppressor, as indicated by the "CA" suffix. It provides symmetrical clamping in both polarities-no cathode band marking is present, and electrical characteristics apply equally for positive and negative transients.
What is the maximum clamping voltage of SM6T24CAHM3_A/I under standard test conditions?
The maximum clamping voltage of SM6T24CAHM3_A/I is 33.2 V when subjected to an 18 A peak pulse current with a 10/1000 μs waveform at TA = 25 °C. This value is measured across the device terminals and defines the upper voltage limit imposed on protected circuitry during surge events.
Does SM6T24CAHM3_A/I require special PCB layout considerations?
SM6T24CAHM3_A/I should be mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve specified thermal resistance (RθJA = 100 °C/W) and 600 W pulse power rating. Short, low-inductance traces to ground or rail are essential to preserve clamping speed and effectiveness.
How does SM6T24CAHM3_A/I differ from the non-automotive SM6T24CA-E3 variant?
SM6T24CAHM3_A/I differs from SM6T24CA-E3 by its AEC-Q101 qualification, halogen-free material set, and enhanced whisker resistance (JESD 201 Class 2). While both share identical electrical specs and SMB packaging, only SM6T24CAHM3_A/I is validated for automotive under-hood deployment and long-term reliability in vibration-prone environments.
SM6T24CAHM3_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 (SMB)
SM6T24CAHM3_A/I FAQ
1.How can I place an order for SM6T24CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T24CAHM3_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 SM6T24CAHM3_A/I reliable?
The price and inventory of SM6T24CAHM3_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 SM6T24CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SM6T24CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T24CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T24CAHM3_A/I?
SM6T24CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T24CAHM3_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 SM6T24CAHM3_A/I?
For technical support, including SM6T24CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T24CAHM3_A/I requirements.
6.How does Aetrix verify that SM6T24CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SM6T24CAHM3_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 SM6T24CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SM6T24CAHM3_A/I?
All SM6T24CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T24CAHM3_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 SM6T24CAHM3_A/I part is unused and in its original packaging.
Return procedure for SM6T24CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T24CAHM3_A/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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