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Vishay General Semiconductor - Diodes Division SM15T6V8CA-M3/9AT
- Part No.:
- SM15T6V8CA-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T6V8CA-M3/9AT.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,295
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Product details
Overview
SM15T6V8CA-M3/9AT 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 (min), 5.8 V stand-off voltage, and clamping voltage of 10.5 V at 143 A peak pulse current. It protects signal lines and power rails in automotive sensor interfaces against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T6V8CA-M3/9AT datasheet, SM15T6V8CA-M3/9AT pinout, SM15T6V8CA-M3/9AT application, or SM15T6V8CA-M3/9AT equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VBR ≈ 1.55), halogen-free RoHS compliance (M3 suffix), and suitability for AEC-Q101-qualified designs when paired with HM3 ordering code.
Technical Context
This device operates as a voltage-clamped surge protector using an avalanche junction structure. Its bidirectional symmetry enables protection on AC-coupled or floating lines without polarity concerns, and its low dynamic impedance ensures stable clamping under fast-rising transients (e.g., 8/20 μs or 10/1000 μs waveforms).
Designed for surface-mount placement on PCBs with minimum 8.0 mm × 8.0 mm copper pads per terminal, it achieves thermal resistance of 75 °C/W (junction-to-ambient) and supports operating junction temperatures up to +150 °C - critical for under-hood automotive environments where sustained thermal stress occurs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 1500 W - sustains high-energy surges from lightning or motor switching without degradation |
| Breakdown Voltage VBR (min/max) | 6.45 V / 7.14 V at 10 mA - defines precise voltage threshold for avalanche conduction onset |
| Stand-off Voltage VWM | 5.8 V - maximum continuous reverse voltage before leakage exceeds 1000 μA |
| Clamping Voltage VC @ IPPM | 10.5 V at 143 A - limits transient voltage seen by downstream ICs to safe levels |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint |
| Operating Temperature Range | –65 °C to +150 °C - validated for extended automotive and industrial ambient conditions |
| RoHS & Halogen-Free Status | M3 suffix - fully compliant with RoHS Directive 2011/65/EU and halogen-free per IEC 61249-2-21 |
Pinout & Package
SM15T6V8CA-M3/9AT uses the SMC (DO-214AB) package: molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1, and 260 °C lead-free reflow compatible. Bidirectional construction means no polarity marking; both terminals are functionally symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Acts as cathode during positive transients; conducts equally in either direction |
| Cathode | Transient return path (bidirectional) | Acts as anode during negative transients; identical electrical behavior to Anode terminal |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse rating (10/1000 μs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth) without derating |
| Low clamping ratio (VC/VBR ≈ 1.55) | Minimizes overvoltage stress on protected ICs compared to higher-ratio TVS devices |
| Low inductance design | Reduces voltage overshoot during fast transients (< 1 ns rise time), improving response fidelity |
| AEC-Q101 qualification option | Available with HM3 suffix for automotive-grade reliability validation (HTOL, TC, UHAST) |
| Halogen-free & RoHS-compliant (M3) | Meets automotive OEM material declarations (e.g., GMW3172, Ford WSS-M99P9999-A1) |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Line Protection |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs in engine control modules exposed to load-dump and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt surge energy before reaching PHY layer. Use Value: Clamps 143 A transients to ≤10.5 V, preventing damage to TI SN65HVD230 or NXP TJA1042 inputs rated for 16 V absolute max. | Use Scenario: Guarding RS-485/RS-422 differential pairs in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Common-mode transient suppressor across A/B lines, referenced to ground via low-inductance layout. Use Value: Maintains signal integrity under 1 kV EFT bursts (IEC 61000-4-4) due to sub-100 ps response time and symmetrical clamping. |
| Consumer USB Port ESD Suppression | Telecom DSL Line Surge Protection |
Use Scenario: Secondary-level protection on USB 2.0 D+/D− lines after primary ESD array, handling longer-duration surges. IC Role / Device Role / Timing Role: High-power backup suppressor absorbing residual energy that bypasses fast-acting polymer-based ESD devices. Use Value: Handles 1500 W surges (vs. typical 500 W for ESD diodes), extending system-level surge immunity beyond IEC 61000-4-5 Class B. | Use Scenario: Primary protection on POTS/DSL line cards subjected to lightning-induced longitudinal surges up to 10 kA. IC Role / Device Role / Timing Role: First-stage crowbar device mounted on line-side transformer secondary, diverting surge current to ground. Use Value: Withstands 200 A non-repetitive forward surge (IFSM), enabling coordination with gas discharge tubes (GDTs) in hybrid protection schemes. |
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 | 600 W peak power (10/1000 μs); SMA package (smaller footprint, higher RθJA = 110 °C/W) | Limited to lower-energy threats (IEC 61000-4-5 Level 2); unsuitable for under-hood automotive use above 105 °C ambient | Select when board space is constrained and surge threat level is ≤ 1 kV/0.5 kA |
| SMCJ6.8CA | 1500 W rating same as SM15T6V8CA-M3/9AT; identical SMC package; VBR min = 6.45 V but VC = 11.2 V @ 134 A | Higher clamping voltage increases stress on protected ICs; no M3 halogen-free option available in standard distribution | Choose only if halogen-free requirement is waived and clamping margin allows 11.2 V transient ceiling |
Compared with SMAJ6.8CA and SMCJ6.8CA, SM15T6V8CA-M3/9AT delivers superior thermal performance (RθJA = 75 °C/W), guaranteed halogen-free compliance, and tighter clamping (10.5 V vs. 11.2 V), making it preferred for AEC-Q101-aligned automotive and high-reliability industrial designs.
Availability
SM15T6V8CA-M3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial communication ports, and telecom line-card surge protection requiring stable component supply across multi-year production cycles.
Supply support for SM15T6V8CA-M3/9AT 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 reliability, power efficiency, and automotive-grade qualification.
The SM15T Series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive powertrain, body electronics, and industrial control systems where 1500 W surge handling and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of SM15T6V8CA-M3/9AT at its rated peak pulse current?
The SM15T6V8CA-M3/9AT has a maximum clamping voltage (VC) of 10.5 V at 143 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured with the device mounted on 8.0 mm × 8.0 mm copper pads per terminal and represents the upper limit of voltage imposed on protected circuitry during surge events.
Is SM15T6V8CA-M3/9AT suitable for automotive applications requiring AEC-Q101 qualification?
The base SM15T6V8CA-M3/9AT is commercial-grade and RoHS/halogen-free compliant. For AEC-Q101 qualification, Vishay offers the HM3 variant (e.g., SM15T6V8CAHM3_A/I). The "M3" suffix alone does not imply automotive qualification - only HM3-suffixed versions undergo HTOL, temperature cycling, and UHAST testing per AEC-Q101 Rev D.
How does the bidirectional configuration of SM15T6V8CA-M3/9AT affect PCB layout?
Because SM15T6V8CA-M3/9AT is bidirectional, no polarity marking exists on the SMC package, and both terminals are electrically symmetric. Layout requires equal-length, low-inductance traces to ground or between differential lines, with no need for orientation verification during automated placement - simplifying assembly and reducing misorientation risk.
What is the thermal resistance junction-to-ambient for SM15T6V8CA-M3/9AT?
The typical thermal resistance junction-to-ambient (RθJA) for SM15T6V8CA-M3/9AT is 75 °C/W when mounted on the recommended 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pad per terminal. This value assumes still air convection and is critical for calculating maximum power dissipation at elevated ambient temperatures.
Can SM15T6V8CA-M3/9AT be used in place of a unidirectional TVS like SM15T6V8A?
No - SM15T6V8CA-M3/9AT is strictly bidirectional and lacks polarity marking, while SM15T6V8A is unidirectional with cathode band identification. Substituting them requires verifying circuit topology: bidirectional use is mandatory for AC-coupled, floating, or differential lines; unidirectional parts are required for DC-biased rails where reverse conduction must be blocked.
SM15T6V8CA-M3/9AT 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:
- Active
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SM15T6V8CA-M3/9AT FAQ
1.How can I place an order for SM15T6V8CA-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T6V8CA-M3/9AT 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 SM15T6V8CA-M3/9AT reliable?
The price and inventory of SM15T6V8CA-M3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T6V8CA-M3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T6V8CA-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T6V8CA-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T6V8CA-M3/9AT?
SM15T6V8CA-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T6V8CA-M3/9AT 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 SM15T6V8CA-M3/9AT?
For technical support, including SM15T6V8CA-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T6V8CA-M3/9AT requirements.
6.How does Aetrix verify that SM15T6V8CA-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T6V8CA-M3/9AT 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 SM15T6V8CA-M3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T6V8CA-M3/9AT?
All SM15T6V8CA-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T6V8CA-M3/9AT, 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 SM15T6V8CA-M3/9AT part is unused and in its original packaging.
Return procedure for SM15T6V8CA-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T6V8CA-M3/9AT Tags
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