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Vishay General Semiconductor - Diodes Division SM15T6V8CAHM3/I
- Part No.:
- SM15T6V8CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T6V8CAHM3/I.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,018
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Product details
Overview
SM15T6V8CAHM3/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 6.8 V breakdown voltage (VBR), 10.5 V clamping voltage (VC) at 143 A IPPM, and operating junction temperature up to +150 °C. It protects automotive sensor signal lines against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T6V8CAHM3/I datasheet, SM15T6V8CAHM3/I pinout, SM15T6V8CAHM3/I application, or SM15T6V8CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, low clamping ratio (VC/VBR ≈ 1.55), and compatibility with high-reliability automotive PCB layouts requiring MSL Level 1 reflow.
Technical Context
The SM15T6V8CAHM3/I is a glass-passivated, bidirectional TVS diode designed to clamp transient overvoltages in both polarities without polarity marking. Its 10/1000 μs waveform rating of 1500 W and 143 A peak pulse current (IPPM) enable robust protection against ISO 7637-2 and IEC 61000-4-5 threats.
It features low dynamic impedance (calculated as ~0.073 Ω from ΔV/ΔI = (10.5 V − 6.8 V)/143 A), low junction capacitance (<1000 pF at 0 V), and thermal resistance RθJA = 75 °C/W - optimized for surface-mount placement on 8.0 mm × 8.0 mm copper pads per terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 1500 W - sustains lightning surge energy without failure under standard test conditions |
| Breakdown Voltage VBR (min/max) | 6.45 V / 7.14 V at 10 mA - defines precise voltage threshold where clamping initiates |
| Stand-off Voltage VWM | 5.8 V - maximum continuous reverse voltage before leakage exceeds 1000 μA |
| Clamping Voltage VC at IPPM | 10.5 V at 143 A - limits downstream IC voltage during worst-case transient |
| Operating Junction Temp. | −65 °C to +150 °C - supports under-hood automotive environments and industrial ambient extremes |
| Package | SMC (DO-214AB) - industry-standard 2-pin surface-mount outline with 7.75 mm × 6.22 mm footprint |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD |
Pinout & Package
SM15T6V8CAHM3/I uses the SMC (DO-214AB) package: a 2-terminal, bidirectional device with no polarity marking. Terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (negative polarity) | Accepts reverse surge current during negative transients; symmetric with cathode in bidirectional operation |
| Cathode | Transient current entry point (positive polarity) | Accepts forward surge current during positive transients; electrically identical to anode in CA-suffix devices |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including 1000-cycle temperature cycling and 1000-hr HTOL |
| Halogen-free & RoHS-compliant | Meets automotive material compliance standards (J-STD-609 Class 1) and environmental regulations |
| Low clamping ratio (VC/VBR) | 1.55 - minimizes overvoltage stress on protected ICs compared to higher-ratio alternatives |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow without moisture sensitivity concerns or baking requirements |
Applications
| Automotive Sensor Interface | Industrial CAN Bus Protection |
|---|---|
|
Use Scenario: Protecting LIN/CAN transceiver inputs and analog sensor outputs (e.g., pressure, temperature) in engine control units exposed to load-dump and inductive kickback. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt transients before reaching PHY or ADC input stages. Use Value: Prevents latch-up or gate oxide damage in 5 V or 3.3 V automotive microcontrollers by limiting transient voltage to ≤10.5 V at 143 A. |
Use Scenario: Safeguarding two-wire CAN FD physical layer interfaces in factory automation controllers subjected to EFT and surge events per IEC 61000-4-4/5. IC Role / Device Role / Timing Role: Differential-line TVS pair (one per line) providing symmetrical clamping without disrupting DC bias or signal integrity. Use Value: Maintains CAN common-mode range while suppressing ±30 kV ESD and 1 kV surge pulses - verified via AEC-Q101 stress testing. |
| Consumer USB Port ESD Protection | Telecom DSL Line Transient Suppression |
|
Use Scenario: Secondary-level protection on USB 2.0 D+/D− lines in set-top boxes and smart displays where primary TVS resides upstream. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) clamping device absorbing residual transients after ferrite bead filtering. Use Value: Limits voltage excursion to <12 V during 8 kV contact ESD (IEC 61000-4-2), preventing data corruption in USB PHY receivers. |
Use Scenario: Protecting ADSL/VDSL line drivers and SLIC circuits in residential gateways against lightning surges coupled via telephone wiring. IC Role / Device Role / Timing Role: High-energy (1500 W) bidirectional suppressor mounted at line interface transformer secondary side. Use Value: Withstands 10/1000 μs surges up to 143 A without degradation, preserving line driver MOSFETs and analog front-end components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.8CA | Lower peak power (400 W), same VBR (6.45–7.14 V), SMA package (smaller thermal mass) | Not AEC-Q101 qualified; limited to commercial-grade consumer/industrial use | Select when cost and board space constrain design, and surge threat level is below ISO 7637-2 Pulse 5a. |
| 1.5KE6.8CA | Higher peak power (1500 W), axial-leaded DO-201 package, higher VC (12.7 V at 118 A) | Through-hole mounting only; unsuitable for automated SMT assembly or high-density PCBs | Choose for legacy designs requiring through-hole replacement or where board-level mechanical robustness outweighs SMT efficiency. |
Compared with SMAJ6.8CA and 1.5KE6.8CA, SM15T6V8CAHM3/I delivers automotive-grade reliability in SMT format with superior clamping performance (10.5 V vs. 12.7 V) and lower thermal resistance - critical for sustained surge duty cycles in engine bay modules.
Availability
SM15T6V8CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial CAN bus interfaces, and telecom DSL line transient suppression requiring stable component supply across multi-year production programs.
Supply support for SM15T6V8CAHM3/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, and protection devices with emphasis on high-reliability, high-power, and automotive-qualified solutions.
The SM15T Series was developed specifically for AEC-Q101-compliant transient suppression in harsh automotive environments, targeting engine control, body electronics, and ADAS sensor interfaces where robustness and long-term stability are mandatory.
FAQ
What does the "CA" suffix indicate in SM15T6V8CAHM3/I?
The "CA" suffix denotes a bidirectional configuration - meaning SM15T6V8CAHM3/I clamps transient overvoltages in both polarities, with identical electrical characteristics for positive and negative surges. This eliminates polarity marking on the device and enables direct placement on differential or AC-coupled signal paths without orientation concerns.
Is SM15T6V8CAHM3/I suitable for automotive applications?
Yes - SM15T6V8CAHM3/I carries the HM3 suffix, confirming halogen-free, RoHS-compliant construction and full AEC-Q101 qualification. It has passed stress tests including high-temperature operating life (HTOL), temperature cycling (TCT), and ESD per ANSI/ESDA-JEDEC JS-001, making it approved for under-hood and chassis-mounted automotive ECUs.
What is the clamping voltage of SM15T6V8CAHM3/I at its rated peak pulse current?
The clamping voltage (VC) of SM15T6V8CAHM3/I is 10.5 V when subjected to its peak pulse current (IPPM) of 143 A under the standard 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88380 and defines the maximum voltage seen by protected circuitry during worst-case transient events.
How does the SMC package of SM15T6V8CAHM3/I compare to SMA or DO-214AC?
The SMC (DO-214AB) package used by SM15T6V8CAHM3/I offers larger copper pad area and lower thermal resistance (RθJA = 75 °C/W) than SMA (DO-214AC), enabling higher surge energy handling. Its 7.75 mm × 6.22 mm footprint supports robust mechanical anchoring and better heat dissipation than smaller packages - critical for 1500 W pulse ratings.
Does SM15T6V8CAHM3/I require derating at elevated ambient temperatures?
Yes - SM15T6V8CAHM3/I must be derated above TA = 25 °C per Figure 2 in Vishay document 88380. At 85 °C ambient, its peak pulse power drops to approximately 750 W (50 % derating), and at 125 °C, it falls to ~300 W. Designers must apply this derating curve when sizing for high-temperature environments like engine compartments.
SM15T6V8CAHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- SM15T, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 5.8V
- Voltage - Breakdown (Min):
- 6.45V
- Voltage - Clamping (Max) @ Ipp:
- 10.5V
- Current - Peak Pulse (10/1000µs):
- 143A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMC)
SM15T6V8CAHM3/I FAQ
1.How can I place an order for SM15T6V8CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T6V8CAHM3/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 SM15T6V8CAHM3/I reliable?
The price and inventory of SM15T6V8CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T6V8CAHM3/I is usually 5 days.
3.What payment methods are accepted for SM15T6V8CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T6V8CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T6V8CAHM3/I?
SM15T6V8CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T6V8CAHM3/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 SM15T6V8CAHM3/I?
For technical support, including SM15T6V8CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T6V8CAHM3/I requirements.
6.How does Aetrix verify that SM15T6V8CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SM15T6V8CAHM3/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 SM15T6V8CAHM3/I meets industry standards.
7.What is the process for return or replacement of SM15T6V8CAHM3/I?
All SM15T6V8CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM15T6V8CAHM3/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 SM15T6V8CAHM3/I part is unused and in its original packaging.
Return procedure for SM15T6V8CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T6V8CAHM3/I Tags
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