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Vishay General Semiconductor - Diodes Division SM6T15CAHM3_A/I
- Part No.:
- SM6T15CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T15CAHM3_A/I.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,255
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Product details
Overview
SM6T15CAHM3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, with 15 V standoff voltage (VWM), 16.7 V breakdown voltage (VBR), 600 W peak pulse power (10/1000 μs), and clamping voltage of 24.4 V at 24.5 A. It protects signal lines in automotive sensor units against inductive switching transients.
For engineers reviewing the SM6T15CAHM3_A/I datasheet, SM6T15CAHM3_A/I pinout, SM6T15CAHM3_A/I application, or SM6T15CAHM3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 150 °C max junction temperature, low inductance for fast response, and halogen-free RoHS-compliant construction.
Technical Context
The SM6T15CAHM3_A/I operates as a bidirectional voltage-clamping device, symmetrically suppressing transients in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1 μA at 12.8 V).
Designed for surface-mount automated placement, it delivers 600 W peak pulse power per 10/1000 μs waveform with clamping voltage of 24.4 V at 24.5 A, and meets MSL Level 1 (260 °C reflow peak). Thermal resistance is 100 °C/W junction-to-ambient on standard 5.0 mm × 5.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12.8 V - maximum reverse stand-off voltage before conduction begins; defines operating range for protected circuit |
| VBR (min/max) | 14.3 V / 15.8 V - breakdown occurs within this band at 1 mA test current; ensures predictable turn-on threshold |
| VC @ IPPM | 24.4 V at 24.5 A - clamped voltage during 10/1000 μs surge; limits stress on downstream ICs |
| PPPM | 600 W - peak pulse power handling capacity; supports robust protection against IEC 61000-4-5 surges |
| TJ max. | +150 °C - maximum junction temperature; enables operation in under-hood automotive environments |
| Package | SMB (DO-214AA) - standardized surface-mount outline with 2.20 mm height and 5.59 mm length; compatible with high-volume SMT lines |
Pinout & Package
Package: SMB (DO-214AA), bidirectional device with no polarity marking; matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (negative polarity) | Conducts surge current when voltage falls below -VBR; symmetrical to cathode in bidirectional operation |
| Cathode | Transient current entry point (positive polarity) | Conducts surge current when voltage exceeds +VBR; functionally identical to anode due to bidirectional design |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for global automotive and industrial supply chains |
| Low inductance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulses) |
| MSL Level 1 | Allows unlimited floor life and standard 260 °C reflow without moisture sensitivity concerns |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Lines |
|---|---|
Use Scenario: Protecting ABS wheel speed sensor outputs from load dump and inductive kickback in 12 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed across differential signal pair upstream of receiver IC. Use Value: Limits transient voltage to ≤24.4 V, preventing damage to 3.3 V or 5 V interface ICs while maintaining signal integrity. | Use Scenario: Guarding CAN_H/CAN_L lines in factory automation controllers exposed to relay coil switching noise. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor on bus differential pair, referenced to ground. Use Value: Absorbs 600 W surges without degradation, preserving CAN FD timing margins and bit error rate performance. |
| Consumer Power Adapter Inputs | Telecom Line Card Surge Protection |
Use Scenario: Input-stage protection for USB-C PD adapters subjected to AC line surges and hot-plug transients. IC Role / Device Role / Timing Role: Primary-level TVS across AC input rectifier output, shunting energy before primary controller. Use Value: Withstands repeated 10/1000 μs surges up to 24.5 A while maintaining <1 μA leakage at 12.8 V standby. | Use Scenario: Secondary-side protection on Ethernet PHY interface lines in VoIP gateways connected to PSTN wiring. IC Role / Device Role / Timing Role: Bidirectional clamp between data line and chassis ground, meeting GR-1089-CORE Level 3 surge immunity. Use Value: Clamps induced lightning surges to safe levels without affecting 100BASE-TX signal rise/fall times due to low junction capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15CA | Same VWM (12.8 V) and VC (24.4 V), but 400 W PPPM (vs. 600 W); SMA package (larger RθJA = 140 °C/W) | Limited to lower-energy transients; less suitable for automotive load dump per ISO 7637-2 Pulse 5a | Select SM6T15CAHM3_A/I when 600 W surge handling and AEC-Q101 qualification are required |
| 1.5KE15CA | Same VWM and bidirectional function, but through-hole DO-204AC package; higher parasitic inductance; 1500 W PPPM but derated above 25 °C | Not SMT-compatible; unsuitable for automated high-density PCB assembly | Choose SM6T15CAHM3_A/I for surface-mount production, space-constrained layouts, and automotive PPAP compliance |
Compared with SMAJ15CA and 1.5KE15CA, the SM6T15CAHM3_A/I provides higher surge power density in a smaller footprint, guaranteed AEC-Q101 qualification, and optimized thermal performance for reflow-soldered automotive modules.
Availability
SM6T15CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor units, industrial CAN bus interfaces, consumer power adapter inputs, and telecom line card surge protection requiring stable component supply and long-term lifecycle support.
Supply support for SM6T15CAHM3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SM6T Series is designed for robust transient voltage suppression in harsh environments, targeting automotive, industrial, and telecom applications where AEC-Q101 qualification, high pulse power, and consistent clamping behavior are critical.
FAQ
What does the "CA" suffix indicate in SM6T15CAHM3_A/I?
The "CA" suffix in SM6T15CAHM3_A/I denotes a bidirectional configuration, meaning the device clamps transient voltages symmetrically in both positive and negative polarities. Unlike unidirectional variants (e.g., SM6T15A), it has no cathode marking and is used where polarity reversal or AC-coupled signals require protection without orientation constraints. This is confirmed in Vishay's SM6T datasheet revision 09-Jan-2024, section "DEVICES FOR BIDIRECTION APPLICATIONS".
Is SM6T15CAHM3_A/I qualified for automotive use?
Yes, SM6T15CAHM3_A/I is AEC-Q101 qualified, as indicated by the "HM3" suffix (halogen-free, RoHS-compliant, and AEC-Q101 qualified) and explicitly stated in the Vishay SM6T datasheet revision 09-Jan-2024. It undergoes stress testing including temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 requirements, making it suitable for under-hood and body-control module applications.
What is the clamping voltage of SM6T15CAHM3_A/I and how is it measured?
The clamping voltage of SM6T15CAHM3_A/I is 24.4 V, measured at a peak pulse current (IPPM) of 24.5 A using a 10/1000 μs waveform per Figure 1 in the Vishay datasheet. This value represents the maximum voltage seen across the device during a standardized surge event and directly determines the protection level afforded to downstream components such as microcontrollers or transceivers.
Does SM6T15CAHM3_A/I have a polarity marking on the package?
No, SM6T15CAHM3_A/I does not have a polarity marking because it is a bidirectional TVS diode. As specified in the Vishay SM6T datasheet, "no marking on bidirectional types". The SMB (DO-214AA) package is symmetric, and both terminals behave identically under positive or negative overvoltage conditions-eliminating orientation concerns during placement.
What is the thermal resistance of SM6T15CAHM3_A/I and how does it affect layout?
The typical junction-to-ambient thermal resistance (RθJA) of SM6T15CAHM3_A/I is 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as stated in the Vishay datasheet. This value assumes minimum recommended pad layout; reducing pad area increases thermal resistance and may cause junction overheating during repetitive surges, so PCB layout must follow Vishay's mounting pad dimensions to maintain reliability.
SM6T15CAHM3_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):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 28A
- 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)
SM6T15CAHM3_A/I FAQ
1.How can I place an order for SM6T15CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T15CAHM3_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 SM6T15CAHM3_A/I reliable?
The price and inventory of SM6T15CAHM3_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 SM6T15CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SM6T15CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T15CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T15CAHM3_A/I?
SM6T15CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T15CAHM3_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 SM6T15CAHM3_A/I?
For technical support, including SM6T15CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T15CAHM3_A/I requirements.
6.How does Aetrix verify that SM6T15CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SM6T15CAHM3_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 SM6T15CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SM6T15CAHM3_A/I?
All SM6T15CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T15CAHM3_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 SM6T15CAHM3_A/I part is unused and in its original packaging.
Return procedure for SM6T15CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T15CAHM3_A/I Tags
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