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Vishay General Semiconductor - Diodes Division 1.5SMC68A-M3/9AT
- Part No.:
- 1.5SMC68A-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC68A-M3/9AT.pdf
- Description:
- TVS DIODE 58.1VWM 92VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:4,344
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Product details
Overview
1.5SMC68A-M3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 68 V breakdown voltage (VBR = 64.6–71.4 V at 1 mA), 58.1 V stand-off voltage (VWM), 92.0 V maximum clamping voltage (VC) at 16.3 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O protection, and DC power rail surge suppression.
For engineers reviewing the 1.5SMC68A-M3/9AT datasheet, 1.5SMC68A-M3/9AT pinout, 1.5SMC68A-M3/9AT application, or 1.5SMC68A-M3/9AT equivalent, key selection criteria include clamping performance under 10/1000 µs transients, unidirectional polarity marking, SMC (DO-214AB) package thermal resistance (RθJA = 75 °C/W), and halogen-free RoHS compliance per M3 suffix.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse-biased voltage exceeds VBR, it avalanches to divert surge current away from downstream circuitry. Its glass-passivated junction ensures stable breakdown and low leakage (<1 µA at VWM), while the SMC package supports automated placement and meets MSL Level 1 reflow requirements (260 °C peak).
The device delivers 1500 W peak pulse power handling with 0.01% duty cycle, exhibits fast response time (<1 ns), and maintains low incremental surge resistance - critical for protecting MOSFET gates, microcontroller I/O pins, and CAN/LIN bus lines against ESD and lightning-induced transients in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 64.6 V / 71.4 V at 1 mA - defines precise avalanche onset range for reliable clamping threshold |
| VWM | 58.1 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | 92.0 V at 16.3 A - clamping voltage during 1500 W 10/1000 µs surge, limiting stress on protected ICs |
| PPPM | 1500 W - peak pulse power capability enables protection against severe lightning and inductive switch transients |
| RθJA | 75 °C/W - thermal resistance determines derating above 25 °C ambient; requires copper pad layout per spec |
| TJ max | +150 °C - maximum junction temperature supports operation in under-hood automotive and industrial enclosures |
| Package | SMC (DO-214AB) - surface-mount package with 8.0 mm × 8.0 mm copper pads for optimal thermal dissipation |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; conducts only during forward surge events (e.g., reverse polarity faults) |
| Cathode | Reverse-biased clamping terminal | Marked with band; connected to higher-potential side; avalanches to clamp transients above VWM |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables single-device protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12 V/24 V systems |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes voltage overshoot during clamping, reducing risk of latch-up or gate oxide damage in protected FETs/ICs |
| Glass-passivated junction | Ensures long-term stability of VBR and low leakage (<1 µA) across temperature and lifetime |
| Halogen-free, RoHS-compliant (M3) | Meets environmental compliance requirements for automotive and industrial OEM programs without compromising reliability |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without pre-baking or special handling |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) in engine control units from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between sensor signal line and ground, clamping transients within nanoseconds. Use Value: Limits voltage excursion to ≤92.0 V during 1500 W surges, preserving ADC input integrity and preventing microcontroller reset. |
Use Scenario: Safeguarding digital input channels on programmable logic controllers exposed to field wiring transients in factory automation. IC Role / Device Role / Timing Role: Standoff-rated TVS on 24 V DC input lines, absorbing repetitive switching noise and accidental 48 V miswiring events. Use Value: Withstands 0.01% duty cycle surges and maintains <1 µA leakage at 58.1 V, ensuring stable logic-level recognition. |
| DC Power Rail Protection | Motor Drive Gate Protection |
|
Use Scenario: Secondary overvoltage protection on 48 V battery-fed subsystems (e.g., ADAS cameras, infotainment) after primary DC/DC regulation. IC Role / Device Role / Timing Role: Clamp-type TVS across rail-to-ground, activated only during fault conditions exceeding VWM. Use Value: Clamps 10/1000 µs transients to 92.0 V while dissipating 1500 W, preventing regulator overvoltage failure and downstream component damage. |
Use Scenario: Shielding high-side and low-side MOSFET gates in half-bridge motor drivers from Miller-induced voltage spikes during fast switching. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS placed between gate and source, suppressing sub-10 ns ringing. Use Value: Fast <1 ns response and low incremental resistance prevent gate oxide breakdown while adding negligible capacitance to gate loop. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ68A-M3/86A | Same VBR (64.6–71.4 V) and VC (92.0 V), but SMB package (lower PPPM = 600 W) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 or automotive load dump | Select only where space constraints prohibit SMC and surge energy is ≤600 W |
| 1.5KE68A-E3/54 | Through-hole DO-201 package, identical electrical specs, higher RθJA (~100 °C/W) | Requires wave soldering or hand assembly; less suitable for high-density automated PCBs | Choose for legacy designs, prototyping, or where thermal mass of through-hole improves sustained surge handling |
Compared with SMBJ68A-M3/86A and 1.5KE68A-E3/54, the 1.5SMC68A-M3/9AT uniquely balances 1500 W surge capacity, SMC surface-mount compatibility, and halogen-free compliance - making it optimal for volume automotive and industrial production where board space, reflow yield, and environmental specs are jointly constrained.
Availability
1.5SMC68A-M3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and 48 V DC power rail protection requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for 1.5SMC68A-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, TVS devices, and optoelectronics with emphasis on reliability and automotive-grade qualification.
The 1.5SMC Series was engineered specifically for high-energy transient suppression in demanding environments - delivering consistent clamping performance, AEC-Q101 qualification options, and robust packaging for under-hood and factory-floor applications.
FAQ
What is the clamping voltage of the 1.5SMC68A-M3/9AT under a 10/1000 µs surge?
The 1.5SMC68A-M3/9AT has a maximum clamping voltage (VC) of 92.0 V at 16.3 A peak pulse current, measured with a 10/1000 µs waveform. This value is guaranteed per Vishay's datasheet (Document Number 88303, Rev. 09-Mar-2026) and reflects the upper limit of voltage seen by protected circuitry during standardized surge events - critical for validating margin against downstream IC absolute maximum ratings.
Is the 1.5SMC68A-M3/9AT suitable for automotive applications?
Yes - the 1.5SMC68A-M3/9AT is halogen-free and RoHS-compliant (M3 suffix), and the base 1.5SMC68A variant is AEC-Q101 qualified (ordering code HM3 or HE3). While the -M3/9AT suffix itself denotes commercial-grade halogen-free construction, it shares identical electrical and thermal characteristics with qualified versions and is widely deployed in non-safety-critical automotive subsystems including body control modules and sensor interfaces.
What does the "M3" in 1.5SMC68A-M3/9AT signify?
The "M3" suffix indicates halogen-free, RoHS-compliant construction per Vishay's material categorization standards. It confirms the molding compound contains no brominated flame retardants or chlorine-based additives, meeting stringent environmental requirements for industrial and automotive electronics without sacrificing electrical performance or thermal robustness in the 1.5SMC68A-M3/9AT.
How is polarity marked on the 1.5SMC68A-M3/9AT?
The 1.5SMC68A-M3/9AT is a unidirectional TVS diode with polarity indicated by a cathode band printed on the SMC (DO-214AB) package body. The banded end is the cathode and must be connected toward the higher-potential side of the protected line - e.g., to VCC or signal source - while the anode connects to ground or return path, enabling proper reverse-bias clamping operation.
What is the thermal resistance of the 1.5SMC68A-M3/9AT, and how does it affect layout?
The 1.5SMC68A-M3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. To maintain safe junction temperatures under repeated surges, PCB layout must replicate this pad area - undersized traces or insufficient copper will increase RθJA, risking thermal runaway and reduced surge endurance in the 1.5SMC68A-M3/9AT.
1.5SMC68A-M3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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)
1.5SMC68A-M3/9AT FAQ
1.How can I place an order for 1.5SMC68A-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC68A-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 1.5SMC68A-M3/9AT reliable?
The price and inventory of 1.5SMC68A-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 1.5SMC68A-M3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC68A-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC68A-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC68A-M3/9AT?
1.5SMC68A-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC68A-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 1.5SMC68A-M3/9AT?
For technical support, including 1.5SMC68A-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC68A-M3/9AT requirements.
6.How does Aetrix verify that 1.5SMC68A-M3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC68A-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 1.5SMC68A-M3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC68A-M3/9AT?
All 1.5SMC68A-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC68A-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 1.5SMC68A-M3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC68A-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC68A-M3/9AT Tags
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