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Vishay General Semiconductor - Diodes Division SM6T24CAHM3_B/I
- Part No.:
- SM6T24CAHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T24CAHM3_B/I.pdf
- Description:
- 600W,24V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,545
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Product details
Overview
SM6T24CAHM3_B/I 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. It provides robust ESD and surge protection for automotive sensor signal lines and industrial I/O interfaces.
For engineers reviewing the SM6T24CAHM3_B/I datasheet, SM6T24CAHM3_B/I pinout, SM6T24CAHM3_B/I application, or SM6T24CAHM3_B/I equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification, halogen-free RoHS compliance, low clamping ratio (1.38×VWM), and MSL Level 1 reflow capability up to 260 °C.
Technical Context
This device operates as a voltage-clamped shunt protector with symmetrical breakdown behavior in both polarities due to its bidirectional construction. Its glass-passivated junction ensures stable VBR (22.8–25.2 V) and low leakage (<1 μA at 20.5 V), while the SMB package delivers low parasitic inductance for fast transient response.
Designed for automotive-grade reliability, SM6T24CAHM3_B/I meets AEC-Q101 stress tests and supports operation from –65 °C to +150 °C junction temperature. Its thermal resistance (RθJA = 100 °C/W) and 5.0 W steady-state power dissipation enable use on standard PCB copper pads without heatsinking in most embedded protection applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before conduction begins |
| 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 @ 18 A - Clamps transients to ≤33.2 V during 600 W 10/1000 μs surge, protecting downstream ICs |
| PPPM | 600 W - Peak pulse power handling per single transient event, validated per Fig. 1 curve |
| TJ max | +150 °C - Maximum junction temperature rating enables under-hood automotive deployment |
| Package | SMB (DO-214AA) - Surface-mount outline with 0.220" × 0.130" footprint and J-STD-020 MSL Level 1 compatibility |
| AEC-Q101 | Qualified - Certified for automotive electronics per stress test requirements including HTGB, HTRB, and TCT |
Pinout & Package
SMB (DO-214AA) package: bidirectional device with no polarity marking; symmetrical terminals accept voltage transients in either direction. Case dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); matte tin-plated leads meet J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Completes clamping loop during positive or negative surges; electrically identical to cathode |
| Cathode | Transient return path (bidirectional) | Completes clamping loop during positive or negative surges; electrically identical to anode |
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 ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 Level 4 surges on 12 V/24 V systems |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive control units, ADAS sensors, and body electronics requiring long-term field reliability |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and JEDEC J-STD-20 MSL Level 1 reflow profile (260 °C peak) |
| Low clamping ratio (1.38×VWM) | Minimizes overvoltage stress on protected ICs compared to higher-ratio TVS devices |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
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-type transient voltage suppressor placed directly at connector entry point to clamp surges before reaching signal conditioning circuitry. Use Value: Limits voltage excursion to ≤33.2 V during 18 A transients, preserving integrity of 3.3 V/5 V microcontrollers and ADC inputs. | Use Scenario: Safeguarding PLC digital input modules against field-wiring induced surges from solenoid coils and motor drives. IC Role / Device Role / Timing Role: Bidirectional clamping element across isolated 24 V DC input lines to absorb reverse-polarity miswiring and lightning-induced common-mode spikes. Use Value: Maintains functional safety by preventing latch-up or gate oxide damage in optocoupler input stages during repetitive 600 W events. |
| Consumer Power Adapter Input | Telecom Line Card Protection |
Use Scenario: Secondary-side surge suppression in USB-C PD adapters and AC/DC wall adapters exposed to mains-borne transients. IC Role / Device Role / Timing Role: Fast-response TVS placed across secondary-side DC output rails to protect synchronous rectifiers and feedback controllers. Use Value: Clamps 10/1000 μs surges to 33.2 V within <1 ns, avoiding overvoltage shutdown of 24 V output regulation circuitry. | Use Scenario: Overvoltage protection for Ethernet PHY interface pins and PoE-powered device front-ends in enterprise switches and base stations. IC Role / Device Role / Timing Role: Bidirectional transient suppressor bridging differential pairs to suppress ESD (IEC 61000-4-2 ±8 kV) and surge (IEC 61000-4-5 2 kV) without distorting signal integrity. Use Value: Junction capacitance <100 pF at zero bias ensures minimal impact on 100BASE-TX signal rise time and return loss. |
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) and VC (33.2 V), but lower PPPM = 400 W; SMA package (smaller footprint, higher RθJA) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a (load dump) | Select SMAJ24CA only for space-constrained consumer applications where surge energy is below 100 mJ |
| SMCJ24CA | Higher PPPM = 1500 W; same VWM/VC; larger SMC (DO-214AB) package with lower RθJA (50 °C/W) | Supports higher-repetition surges and longer-duration transients; requires larger PCB area | Choose SMCJ24CA when system-level testing demands >600 W margin or extended thermal endurance beyond 100 ms |
Compared with SMAJ24CA and SMCJ24CA, SM6T24CAHM3_B/I offers balanced surge robustness (600 W), AEC-Q101 qualification, and SMB footprint-making it optimal for cost-sensitive automotive and industrial designs needing verified reliability without over-engineering package size or power rating.
Availability
SM6T24CAHM3_B/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line card protection requiring stable component supply and long-term lifecycle support.
Supply support for SM6T24CAHM3_B/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 and automotive-grade performance.
The SM6T Series is designed specifically for board-level transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where AEC-Q101 qualification, consistent clamping, and surface-mount manufacturability are critical.
FAQ
What is the exact breakdown voltage range for SM6T24CAHM3_B/I?
The SM6T24CAHM3_B/I has a guaranteed breakdown voltage (VBR) range of 22.8 V to 25.2 V at 1 mA test current, measured per JEDEC standards. This symmetric bidirectional specification ensures consistent clamping behavior regardless of surge polarity. The value is confirmed in Table "ELECTRICAL CHARACTERISTICS" on page 2 of Vishay document 88385, revision 09-Jan-2024.
Is SM6T24CAHM3_B/I qualified for automotive applications?
Yes, SM6T24CAHM3_B/I is AEC-Q101 qualified, as indicated by the "HM3" suffix and explicitly stated in the "MECHANICAL DATA" section. It undergoes full stress testing per AEC-Q101 Rev D, including high-temperature reverse bias, temperature cycling, and unbiased highly accelerated stress testing. This makes SM6T24CAHM3_B/I suitable for engine control, ADAS, and body electronics.
What does the "_B/I" suffix mean in SM6T24CAHM3_B/I?
The "_B/I" suffix denotes packaging configuration: "B" indicates tape-and-reel revision code (e.g., revision B), and "I" specifies 13-inch diameter plastic tape and reel with 3200 units per reel. This matches the ordering example "SM6T10AHM3_B/I" in the "ORDERING INFORMATION" table on page 2 of Vishay document 88385.
How does SM6T24CAHM3_B/I differ from unidirectional SM6T24A variants?
SM6T24CAHM3_B/I is bidirectional with symmetrical VBR and clamping in both directions and no cathode band marking; SM6T24A is unidirectional with cathode band and forward conduction capability. The "CA" suffix confirms bidirectionality, and electrical characteristics (e.g., VWM, VC) apply identically in both polarities-critical for AC or floating signal protection.
What is the maximum clamping voltage of SM6T24CAHM3_B/I under surge conditions?
The maximum clamping voltage (VC) of SM6T24CAHM3_B/I is 33.2 V at 18 A peak pulse current (IPPM) using a 10/1000 μs waveform, as specified in the "ELECTRICAL CHARACTERISTICS" table. This value is measured per Figure 1 test conditions and defines the upper voltage limit imposed on protected circuits during worst-case transients.
SM6T24CAHM3_B/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:
- 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:
- Telecom
- 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_B/I FAQ
1.How can I place an order for SM6T24CAHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T24CAHM3_B/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_B/I reliable?
The price and inventory of SM6T24CAHM3_B/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_B/I is usually 5 days.
3.What payment methods are accepted for SM6T24CAHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T24CAHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T24CAHM3_B/I?
SM6T24CAHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T24CAHM3_B/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_B/I?
For technical support, including SM6T24CAHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T24CAHM3_B/I requirements.
6.How does Aetrix verify that SM6T24CAHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SM6T24CAHM3_B/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_B/I meets industry standards.
7.What is the process for return or replacement of SM6T24CAHM3_B/I?
All SM6T24CAHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T24CAHM3_B/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_B/I part is unused and in its original packaging.
Return procedure for SM6T24CAHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T24CAHM3_B/I Tags
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