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Vishay General Semiconductor - Diodes Division SM15T68CA-M3/9AT
- Part No.:
- SM15T68CA-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T68CA-M3/9AT.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,743
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Product details
Overview
SM15T68CA-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), 68 V standoff voltage (VWM = 58.1 V), and clamping voltage of 92.0 V at 16.3 A peak pulse current. It protects signal lines and power rails in automotive sensor units and industrial I/O interfaces against lightning-induced and switching transients.
For engineers reviewing the SM15T68CA-M3/9AT datasheet, SM15T68CA-M3/9AT pinout, SM15T68CA-M3/9AT application, or SM15T68CA-M3/9AT equivalent, key selection criteria include bidirectional clamping behavior, 1500 W surge capability with low clamping ratio (92.0 V / 58.1 V ≈ 1.58), halogen-free RoHS compliance (M3 suffix), and AEC-Q101 qualification readiness via HM3 variant.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage VBR = 64.6–71.4 V (min/max at 1 mA), reverse leakage <1.0 μA at 58.1 V, and thermal resistance RθJA = 75 °C/W. Its glass-passivated junction ensures stable performance under repeated transient stress.
The device sustains 1500 W peak pulse power per 10/1000 μs waveform when mounted on 8.0 mm × 8.0 mm copper pads, and exhibits low inductance suitable for high-speed transient suppression on sensitive analog and digital signal paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 58.1 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 64.6–71.4 V at 1 mA - Confirmed bidirectional avalanche onset range; ensures symmetrical protection |
| VC (Clamping Voltage) | 92.0 V at IPPM = 16.3 A (10/1000 μs) - Actual voltage seen by protected circuit during worst-case surge |
| PPPM (Peak Pulse Power) | 1500 W - Sustained energy absorption capacity for lightning and inductive-switching threats |
| IPPM (Peak Pulse Current) | 16.3 A - Maximum transient current the device safely shunts without failure |
| TJmax | +150 °C - Enables reliable operation in under-hood automotive and industrial ambient environments |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated placement |
Pinout & Package
SM15T68CA-M3/9AT uses the SMC (DO-214AB) package: a surface-mount, bidirectional two-terminal device with no polarity marking. Terminals are matte tin-plated leads solderable per J-STD-002 and JESD 22-B102, meeting JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no functional distinction |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; symmetrical conduction enables dual-polarity clamping |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional 1500 W surge rating | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints |
| Low clamping ratio (1.58) | Minimizes overvoltage stress on downstream ICs like CAN transceivers or ADC front-ends during ESD/EFT events |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets IPC-1752A material declaration requirements for green manufacturing and end-of-life compliance |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without moisture sensitivity handling or baking |
| AEC-Q101 qualification path | HM3 variant available for automotive applications requiring validated reliability per stress test conditions |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
|
Use Scenario: Protecting LIN bus and analog sensor outputs (e.g., temperature, pressure) in engine control modules from load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and ground, responding within nanoseconds to transients exceeding 58.1 V. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V sensor interface ICs by limiting excursion to ≤92.0 V during 16.3 A surges. |
Use Scenario: Shielding RS-485 transceiver data lines in PLC backplanes from induced surges on long field wiring. IC Role / Device Role / Timing Role: Fast-acting shunt element absorbing energy from 10/1000 μs lightning surges before reaching the transceiver's ±15 V absolute maximum rating. Use Value: Maintains communication integrity by clamping differential-mode transients while adding <1 pF parasitic capacitance to the bus. |
| Consumer Power Adapter Input | Telecom Line Card Surge Suppression |
|
Use Scenario: Safeguarding primary-side controller ICs in universal input AC-DC adapters against line-to-line surges per IEC 61000-4-5 Level 3. IC Role / Device Role / Timing Role: Parallel-connected TVS across bridge rectifier output, conducting only during overvoltage events >58.1 V. Use Value: Eliminates need for bulkier MOV-based solutions while delivering repeatable 1500 W surge handling in compact SMC footprint. |
Use Scenario: Front-end protection of POTS line interface ICs in VoIP gateways exposed to tip-ring surges from PSTN wiring. IC Role / Device Role / Timing Role: Symmetrical clamp across tip and ring conductors, suppressing common-mode and differential-mode transients equally. Use Value: Ensures uninterrupted voice service by preventing false hang-up triggers or codec latch-up during 1 kV/0.5 kΩ surge tests. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ64A-E3/57T (Vishay) | Unidirectional; lower PPPM = 400 W; VC = 103 V @ 3.5 A; SMA package (smaller footprint, higher RθJA) | Limited to DC-biased lines; insufficient for 1500 W lightning threats | Select only for space-constrained, low-energy consumer applications where 400 W suffices |
| SMCJ64CA (Littelfuse) | Bidirectional; same 1500 W rating; VWM = 64 V; VC = 103 V @ 14.3 A; identical SMC package | Higher clamping voltage increases stress on protected ICs by 11 V vs. SM15T68CA-M3/9AT | Acceptable where layout allows margin for 103 V clamping; verify system-level immunity with actual VC |
Compared with SMAJ64A-E3/57T and SMCJ64CA, SM15T68CA-M3/9AT delivers superior clamping performance (92.0 V vs. ≥103 V) at full 1500 W rating in the same SMC footprint, making it optimal for automotive and industrial designs demanding minimal overvoltage exposure.
Availability
SM15T68CA-M3/9AT is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line interface circuits requiring stable component supply with halogen-free compliance and surge robustness.
Supply support for SM15T68CA-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, efficiency, and application-specific optimization.
The SM15T Series was engineered for high-energy transient suppression in harsh environments-targeting automotive, industrial, and telecom systems where 1500 W surge immunity and AEC-Q101 readiness are critical design requirements.
FAQ
What does the "CA" suffix indicate in SM15T68CA-M3/9AT?
The "CA" suffix denotes a bidirectional configuration: SM15T68CA-M3/9AT clamps voltage transients of either polarity symmetrically, unlike unidirectional variants (e.g., SM15T68A). This makes SM15T68CA-M3/9AT ideal for AC-coupled or floating signal lines where polarity is undefined or reversible during surge events.
Is SM15T68CA-M3/9AT qualified to AEC-Q101?
SM15T68CA-M3/9AT itself is commercial-grade (M3 suffix), but Vishay offers the HM3 variant (e.g., SM15T68CAHM3_A/I) which is fully AEC-Q101 qualified. The base SM15T68CA-M3/9AT shares identical die and construction-only the qualification testing and traceability differ-so it can be used in automotive prototypes pending formal HM3 procurement.
What is the clamping voltage of SM15T68CA-M3/9AT under a 10/1000 μs surge?
SM15T68CA-M3/9AT clamps to 92.0 V when subjected to its rated peak pulse current of 16.3 A with a 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88380 and represents the maximum voltage imposed on the protected circuit during worst-case transient conditions.
How does the M3 suffix affect SM15T68CA-M3/9AT's compliance status?
The M3 suffix certifies SM15T68CA-M3/9AT as halogen-free and RoHS-compliant per EU Directive 2011/65/EU and IPC-1752A. It confirms absence of brominated flame retardants and chlorine-based compounds, enabling use in environmentally regulated markets without material declaration exceptions.
Can SM15T68CA-M3/9AT replace SM15T68A in an existing design?
SM15T68CA-M3/9AT cannot directly replace unidirectional SM15T68A without circuit review: the CA version conducts in both directions, potentially causing leakage or latch-up in DC-biased paths. Use SM15T68CA-M3/9AT only where bidirectional clamping is required-e.g., differential buses or AC signals-and verify bias conditions match.
SM15T68CA-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):
- 58.1V
- Voltage - Breakdown (Min):
- 64.6V
- Voltage - Clamping (Max) @ Ipp:
- 92V
- Current - Peak Pulse (10/1000µs):
- 16.3A
- 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)
SM15T68CA-M3/9AT FAQ
1.How can I place an order for SM15T68CA-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T68CA-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 SM15T68CA-M3/9AT reliable?
The price and inventory of SM15T68CA-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 SM15T68CA-M3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T68CA-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T68CA-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T68CA-M3/9AT?
SM15T68CA-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T68CA-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 SM15T68CA-M3/9AT?
For technical support, including SM15T68CA-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T68CA-M3/9AT requirements.
6.How does Aetrix verify that SM15T68CA-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T68CA-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 SM15T68CA-M3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T68CA-M3/9AT?
All SM15T68CA-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T68CA-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 SM15T68CA-M3/9AT part is unused and in its original packaging.
Return procedure for SM15T68CA-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T68CA-M3/9AT Tags
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