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Vishay General Semiconductor - Diodes Division 1.5SMC68CA-M3/9AT
- Part No.:
- 1.5SMC68CA-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC68CA-M3/9AT.pdf
- Description:
- TVS DIODE 58.1VWM 92VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,151
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Product details
Overview
1.5SMC68CA-M3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in DC power rails 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 and industrial I/O modules.
For engineers reviewing the 1.5SMC68CA-M3/9AT datasheet, 1.5SMC68CA-M3/9AT pinout, 1.5SMC68CA-M3/9AT application, or 1.5SMC68CA-M3/9AT equivalent, this device serves as a halogen-free, RoHS-compliant, surface-mount TVS for high-energy surge suppression where bidirectional clamping, low leakage (<1 µA at VWM), and AEC-Q101 qualification readiness are critical selection criteria.
Technical Context
The 1.5SMC68CA-M3/9AT operates as a silicon avalanche diode with symmetrical bidirectional clamping behavior, enabling protection of AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance under repetitive transients.
Thermally, it exhibits RθJA = 75 °C/W (typ.) and RθJL = 15 °C/W (typ.), supporting reliable operation up to TJ = 150 °C. It meets J-STD-020 MSL Level 1 and is rated for 200 A non-repetitive forward surge (IFSM) in unidirectional configurations - though this rating does not apply to the bidirectional 1.5SMC68CA-M3/9AT variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 64.6 V / 71.4 V at 1 mA - defines precise voltage threshold at which avalanche conduction begins in both directions |
| VWM | 58.1 V - maximum continuous reverse operating voltage before significant leakage onset; sets safe DC bias margin |
| VC @ IPPM | 92.0 V at 16.3 A - clamped voltage during 1500 W transient, directly limiting downstream IC stress |
| PPPM | 1500 W - peak pulse power handling with 10/1000 µs waveform, enabling lightning and ESD surge immunity per IEC 61000-4-5 |
| ID @ VWM | <1 µA - ultra-low reverse leakage preserves signal integrity and battery life in always-on circuits |
| Package | SMC (DO-214AB) - industry-standard 2-pin surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal design |
| Temperature Range | −65 °C to +150 °C - supports under-hood automotive and industrial environments without derating |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads; polarity-unmarked for bidirectional operation; UL 94 V-0 compliant molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; symmetric with cathode in bidirectional mode | Enables clamping in either polarity - no directional installation required on PCB |
| Cathode | Current exit terminal in forward bias; symmetric with anode in bidirectional mode | Provides identical clamping response regardless of voltage polarity across terminals |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Equal VBR, VC, and leakage performance in both polarities - eliminates need for polarity-aware layout |
| 1500 W peak pulse power | Withstands 10/1000 µs surges per IEC 61000-4-5 Level 4 without degradation - suitable for harsh industrial mains interfaces |
| Halogen-free & RoHS-compliant (M3 suffix) | Meets IPC-1752A material declaration requirements and JEDEC JESD201 Class 2 whisker resistance |
| MSL Level 1 moisture sensitivity | Zero floor life limitation - can be mounted directly after tape-and-reel unpacking without baking |
| Low clamping ratio (VC/VBR ≈ 1.43) | Minimizes overvoltage overshoot during fast transients - critical for protecting 75 V-rated MOSFETs and CAN transceivers |
Applications
| Automotive Sensor Protection | Industrial PLC Analog Inputs |
|---|---|
|
Use Scenario: Protecting 5 V or 12 V supply rails and LIN/CAN bus lines in engine control units and ADAS camera modules against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed upstream of LDOs and interface ICs to limit transient voltage excursions below absolute maximum ratings. Use Value: Maintains system uptime by preventing latch-up or gate oxide rupture in microcontrollers and transceivers during 100 V/50 ms load dump events. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog front-ends in programmable logic controllers exposed to field wiring surges. IC Role / Device Role / Timing Role: Fast-response voltage clamp absorbing induced transients from relay switching or nearby motor drives before they reach precision ADCs. Use Value: Preserves measurement accuracy by limiting input overvoltage to ≤92 V, avoiding saturation or damage to op-amps and reference buffers. |
| Telecom Power Interface | Consumer USB Port Protection |
|
Use Scenario: Shielding PoE-powered Ethernet ports (IEEE 802.3af/at) and DC power feeds from lightning-induced common-mode surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS on secondary-side DC output rails, coordinated with gas discharge tubes (GDTs) for staged surge diversion. Use Value: Enables compliance with ITU-T K.20/K.21 telecom surge immunity standards while maintaining <1 µA standby leakage. |
Use Scenario: Adding robust ESD and surge resilience to USB 2.0 data lines and VBUS pins in smart home hubs and portable media devices. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed adjacent to USB connector to shunt HBM ±15 kV and CDM ±1 kV discharges. Use Value: Prevents port lockup or PHY damage without degrading 480 Mbps signal integrity due to symmetrical clamping and minimal parasitic capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64CA | Lower PPPM (600 W), smaller SMB package (DO-214AA), VC = 103 V @ 5.8 A | Less suited for IEC 61000-4-5 Level 4; preferred where board space is constrained and surge energy is moderate | Select when footprint reduction outweighs peak power requirement and thermal mass is limited |
| 1.5KE68CA | Through-hole TO-218 package, same VBR/VC, higher IPPM (21.2 A), but no MSL Level 1 or halogen-free certification | Used in legacy industrial power supplies where automated SMT is not available or rework tolerance is prioritized | Choose only for through-hole assembly or when AEC-Q101 readiness and RoHS/halogen-free compliance are not required |
Compared with SMBJ64CA and 1.5KE68CA, the 1.5SMC68CA-M3/9AT delivers superior surge robustness in a surface-mount format with verified halogen-free compliance and zero bake requirement - making it optimal for high-reliability automotive and industrial SMT production where long-term supply continuity and process compatibility are essential.
Availability
1.5SMC68CA-M3/9AT is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, telecom power interfaces, and consumer USB port protection requiring stable component supply, full traceability, and long-lifecycle support.
Supply support for 1.5SMC68CA-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 1.5SMC Series is engineered for high-energy transient suppression in demanding environments - targeting automotive, industrial, and telecom systems where consistent clamping performance, AEC-Q101 readiness, and halogen-free compliance are mandatory.
FAQ
What is the exact breakdown voltage range for 1.5SMC68CA-M3/9AT?
The 1.5SMC68CA-M3/9AT has a guaranteed breakdown voltage (VBR) range of 64.6 V to 71.4 V at a test current of 1 mA, measured in both directions due to its bidirectional construction. This specification is confirmed in the Vishay datasheet Document Number 88303, page 2, under ELECTRICAL CHARACTERISTICS for part number (+)1.5SMC68A.
Is 1.5SMC68CA-M3/9AT AEC-Q101 qualified?
The 1.5SMC68CA-M3/9AT is not AEC-Q101 qualified; only variants with HE3 or HM3 suffixes (e.g., 1.5SMC68CAHE3_A) carry AEC-Q101 qualification. The M3 suffix denotes halogen-free and RoHS-compliant commercial-grade construction, per Vishay's ordering information table on page 3 of document 88303.
What does the "CA" suffix mean in 1.5SMC68CA-M3/9AT?
The "CA" suffix in 1.5SMC68CA-M3/9AT explicitly indicates a bidirectional configuration - meaning the device provides symmetrical transient voltage suppression in both polarities. This is distinct from "A"-suffix parts, which are unidirectional and require correct cathode orientation during placement.
What is the maximum clamping voltage of 1.5SMC68CA-M3/9AT and at what current?
The 1.5SMC68CA-M3/9AT clamps to a maximum of 92.0 V when subjected to its peak pulse current (IPPM) of 16.3 A, using the standard 10/1000 µs double-exponential waveform. This value is specified in the Electrical Characteristics table on page 2 of the Vishay 88303 datasheet.
Does 1.5SMC68CA-M3/9AT have a defined polarity marking on the package?
No - the 1.5SMC68CA-M3/9AT has no polarity marking because it is a bidirectional TVS diode. As stated in the Mechanical Data section of the Vishay datasheet (page 1), "no marking on bidirectional types", confirming that the device functions identically regardless of orientation on the PCB.
1.5SMC68CA-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:
- -
- 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)
1.5SMC68CA-M3/9AT FAQ
1.How can I place an order for 1.5SMC68CA-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC68CA-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 1.5SMC68CA-M3/9AT reliable?
The price and inventory of 1.5SMC68CA-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 1.5SMC68CA-M3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC68CA-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC68CA-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC68CA-M3/9AT?
1.5SMC68CA-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC68CA-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 1.5SMC68CA-M3/9AT?
For technical support, including 1.5SMC68CA-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC68CA-M3/9AT requirements.
6.How does Aetrix verify that 1.5SMC68CA-M3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC68CA-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 1.5SMC68CA-M3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC68CA-M3/9AT?
All 1.5SMC68CA-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC68CA-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 1.5SMC68CA-M3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC68CA-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC68CA-M3/9AT Tags
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