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Vishay General Semiconductor - Diodes Division SM15T68CA-M3/57T
- Part No.:
- SM15T68CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T68CA-M3/57T.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,332
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Product details
Overview
SM15T68CA-M3/57T 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), 58.1 V stand-off voltage (VWM), 64.6–71.4 V breakdown voltage (VBR), and clamps to ≤92.0 V at 16.3 A peak pulse current - used to protect automotive sensor signal lines against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T68CA-M3/57T datasheet, SM15T68CA-M3/57T pinout, SM15T68CA-M3/57T application, or SM15T68CA-M3/57T equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification eligibility (via HM3 suffix), low clamping ratio (92.0 V / 64.6 V ≈ 1.42), halogen-free RoHS compliance, and SMC package thermal performance under high-impedance surge conditions.
Technical Context
This bidirectional TVS operates symmetrically in both polarities with identical VBR, VWM, and VC specifications - enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and repeatable clamping behavior across temperature.
The device uses a low-inductance SMC package with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102, delivering RθJA = 75 °C/W and RθJL = 15 °C/W - critical for sustaining 1500 W pulses on standard PCB copper pads (8.0 mm × 8.0 mm per terminal) without thermal runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58.1 V - maximum continuous reverse operating voltage before significant leakage; defines safe working margin below clamping threshold |
| VBR (min/max) | 64.6 V / 71.4 V at 1.0 mA - verified breakdown range ensuring reliable turn-on during transients without premature conduction |
| VC @ IPPM | 92.0 V at 16.3 A (10/1000 μs) - clamping voltage limiting downstream IC stress during worst-case surge events |
| PPPM | 1500 W - peak pulse power handling capacity for lightning and switching transients per IEC 61000-4-5 |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height for automated placement |
Pinout & Package
SM15T68CA-M3/57T is housed in an SMC (DO-214AB) package with two terminals: no polarity marking (bidirectional), symmetrical construction, and matte tin-plated leads solderable per J-STD-002. Thermal performance assumes mounting on 8.0 mm × 8.0 mm copper pads per terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | Conducts surge current into device during positive voltage excursions; electrically identical to Cathode in bidirectional mode |
| Cathode | Transient current entry (negative half-cycle) | Conducts surge current into device during negative voltage excursions; functionally interchangeable with Anode due to symmetry |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC, differential, or floating signal lines without external polarity management |
| 1500 W peak pulse rating | Meets IEC 61000-4-5 Level 4 (4 kV EFT, 2 kV surge) requirements for industrial and automotive interfaces |
| Low clamping ratio (1.42) | Minimizes overvoltage stress on protected ICs compared to higher-ratio TVS devices |
| Halogen-free, RoHS-compliant (M3) | Complies with automotive ELV directive and IPC-1752A material declaration requirements |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN FD or LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) in engine control units exposed to load-dump and alternator ripple. IC Role / Device Role: Bidirectional voltage clamp placed between signal line and ground, absorbing ±1500 W transients without polarity reversal. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V microcontrollers and analog front-end ICs by limiting excursion to ≤92.0 V. | Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers subjected to inductive kickback from solenoid valves and contactors. IC Role / Device Role: Primary surge suppression element on field-side signal traces, coordinated with upstream series impedance. Use Value: Enables robust 24 V DC input stage design meeting IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) immunity standards. |
| Telecom Line Interface | Consumer Power Adapter Feedback Path |
Use Scenario: Transient suppression on RS-485/RS-422 differential pairs in base station remote radio units exposed to lightning-induced surges on long cable runs. IC Role / Device Role: Common-mode and differential-mode clamp integrated into connector-side protection network. Use Value: Maintains signal integrity while limiting common-mode voltage to <92.0 V, preventing damage to isolated RS-485 transceivers. | Use Scenario: Protecting optocoupler feedback paths in flyback power supplies where primary-side transients couple into secondary-side regulation circuitry. IC Role / Device Role: Low-capacitance (<50 pF typical) bidirectional clamp across error amplifier inputs. Use Value: Preserves loop stability and transient response while blocking >58.1 V spikes that could disrupt regulation or damage TL431-type references. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64CA | 600 W PPPM, 64 V VWM, SMB package (smaller thermal mass) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 | Select when board space is constrained and surge threat level is ≤1 kV |
| SMCJ64CA | 1500 W PPPM, same VWM/VBR, but non-AEC-Q101 commercial grade (E3/M3 only) | Lacks automotive qualification path; identical clamping and thermal specs | Choose for cost-sensitive industrial designs where AEC-Q101 is not mandated |
Compared with SMBJ64CA and SMCJ64CA, SM15T68CA-M3/57T provides identical 1500 W surge capability and halogen-free compliance in an AEC-Q101-qualified variant, making it the only option among the three validated for automotive under-hood deployment with full traceability and whisker-tested terminations.
Availability
SM15T68CA-M3/57T 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, halogen-free compliance, and AEC-Q101 qualification support.
Supply support for SM15T68CA-M3/57T 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, TVS devices, and MOSFETs with emphasis on reliability, power handling, and automotive-grade qualification.
The SM15T Series is designed specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where 1500 W surge immunity and AEC-Q101 validation are mandatory.
FAQ
What does the "CA" suffix indicate in SM15T68CA-M3/57T?
The "CA" suffix denotes a bidirectional configuration - meaning SM15T68CA-M3/57T provides symmetrical clamping for both positive and negative voltage transients without polarity dependence. This differs from unidirectional variants (e.g., SM15T68A) which require correct cathode orientation and only clamp in reverse bias. The CA version is used where signal lines lack defined DC polarity, such as differential buses or AC-coupled interfaces.
Is SM15T68CA-M3/57T qualified to AEC-Q101?
SM15T68CA-M3/57T itself is not AEC-Q101 qualified - the M3 suffix indicates halogen-free RoHS compliance only. AEC-Q101 qualification requires the HM3 suffix (e.g., SM15T68CAHM3_A/H). However, SM15T68CA-M3/57T shares identical die, package, and electrical characteristics with its HM3 counterpart, enabling seamless qualification migration when automotive validation is required.
What is the clamping voltage of SM15T68CA-M3/57T at its rated peak pulse current?
The clamping voltage (VC) of SM15T68CA-M3/57T is 92.0 V measured at 16.3 A peak pulse current with a 10/1000 μs waveform. This value represents the maximum voltage seen across the device during a standardized surge event and directly determines the overvoltage stress imposed on downstream components - making it a critical parameter for system-level surge immunity design.
How does the SMC package of SM15T68CA-M3/57T affect thermal performance?
The SMC (DO-214AB) package of SM15T68CA-M3/57T delivers RθJA = 75 °C/W and RθJL = 15 °C/W when mounted on 8.0 mm × 8.0 mm copper pads. This enables effective heat dissipation during 1500 W pulses, preventing thermal runaway. Smaller packages like SMB would exceed junction temperature limits under identical surge conditions due to higher thermal resistance.
Can SM15T68CA-M3/57T replace SM15T68A in an existing design?
SM15T68CA-M3/57T can replace SM15T68A only if the circuit is inherently bidirectional or polarity-agnostic - because SM15T68CA-M3/57T has no polarity marking and clamps in both directions, whereas SM15T68A is unidirectional with a defined cathode band. Substitution requires verifying that reverse-bias conduction in the original layout will not cause unintended current paths or functional disruption.
SM15T68CA-M3/57T 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-M3/57T FAQ
1.How can I place an order for SM15T68CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T68CA-M3/57T 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-M3/57T reliable?
The price and inventory of SM15T68CA-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T68CA-M3/57T is usually 5 days.
3.What payment methods are accepted for SM15T68CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T68CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T68CA-M3/57T?
SM15T68CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T68CA-M3/57T 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-M3/57T?
For technical support, including SM15T68CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T68CA-M3/57T requirements.
6.How does Aetrix verify that SM15T68CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T68CA-M3/57T 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-M3/57T meets industry standards.
7.What is the process for return or replacement of SM15T68CA-M3/57T?
All SM15T68CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T68CA-M3/57T, 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-M3/57T part is unused and in its original packaging.
Return procedure for SM15T68CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T68CA-M3/57T Tags
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Diodes Incorporated
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