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Vishay General Semiconductor - Diodes Division 1.5SMC68CAHM3/I
- Part No.:
- 1.5SMC68CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC68CAHM3/I.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,749
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Product details
Overview
1.5SMC68CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It features a 68 V standoff voltage (VWM), 71.4 V maximum breakdown voltage (VBR), 1500 W peak pulse power (10/1000 μs), 92.0 V clamping voltage at 16.3 A peak pulse current, and operates across -65 °C to +150 °C junction temperature - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC68CAHM3/I datasheet, 1.5SMC68CAHM3/I pinout, 1.5SMC68CAHM3/I application, or 1.5SMC68CAHM3/I equivalent, key selection criteria include bidirectional clamping behavior, AEC-Q101 qualification status, SMC (DO-214AB) package thermal performance, and compliance with UL 497B for telecom and automotive transient immunity standards.
Technical Context
This device functions as a voltage-clamped shunt protector, responding within <1 ps to transients by transitioning from high-impedance blocking to low-impedance conduction when reverse voltage exceeds VBR. Its glass-passivated junction ensures stable leakage (<1 μA at 58.1 V) and repeatable clamping under repetitive 10/1000 μs surges at 0.01% duty cycle.
The 1.5SMC68CAHM3/I is rated for 1500 W peak pulse power on 8.0 mm × 8.0 mm copper pads, with thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-leads), enabling reliable operation without heatsinking in space-constrained automotive and industrial PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 58.1 V - Maximum continuous reverse operating voltage before significant leakage begins; defines safe working margin below clamping threshold. |
| VBR (Breakdown) | 64.6–71.4 V at 1 mA - Voltage range where device transitions into avalanche conduction; guarantees consistent turn-on across production lots. |
| VC (Clamping) | 92.0 V at IPPM = 16.3 A - Maximum voltage seen by protected circuit during 10/1000 μs surge; determines downstream component voltage stress. |
| PPPM | 1500 W - Peak transient energy absorption capability with standard 10/1000 μs waveform; supports IEC 61000-4-5 Level 4 compliance. |
| TJ max. | +150 °C - Maximum junction temperature rating; enables use in under-hood automotive environments and high-ambient industrial enclosures. |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated pick-and-place and reflow soldering. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC-Q101 Rev G. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; reverse-bias reference for bidirectional clamping | Terminal connected to lower-potential side of protected line; symmetric with cathode for bidirectional operation. |
| Cathode | Current exit terminal in forward bias; reverse-bias reference for bidirectional clamping | Terminal connected to higher-potential side of protected line; no polarity marking on bidirectional variants like 1.5SMC68CAHM3/I. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Equal VBR and VC in both directions - eliminates need for polarity-aware placement in AC-coupled or differential signal lines. |
| 1500 W peak pulse rating | Sustains 16.3 A @ 10/1000 μs without degradation - meets IEC 61000-4-5 surge immunity requirements for industrial and automotive ports. |
| Glass-passivated junction | Stable leakage <1 μA at 58.1 V - ensures minimal standby power loss and long-term reliability in battery-backed systems. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive under-hood applications - includes HTOL, TC, and HAST testing per AEC-Q101 Rev G. |
| Halogen-free & RoHS-compliant | Meets JEDEC J-STD-20 and JESD201 Class 2 whisker resistance - suitable for lead-free assembly and environmentally regulated markets. |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting CAN FD and LIN bus transceivers from load-dump and ISO 7637-2 pulses in engine control units. IC Role / Device Role / Timing Role: Bidirectional shunt clamp placed across differential signal pair or supply rail to limit transient overvoltage. Use Value: Clamps 10/1000 μs surges to ≤92.0 V while maintaining <1 μA leakage at 58.1 V, preserving signal integrity and preventing transceiver latch-up. |
Use Scenario: Safeguarding 24 V DC digital input channels in programmable logic controllers against field-wiring induced surges. IC Role / Device Role / Timing Role: Parallel-connected TVS on input terminal block to divert induced lightning or inductive kickback energy. Use Value: Absorbs 1500 W peak pulse without failure, enabling compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) immunity standards. |
| Telecom Line Interface Protection | Consumer Power Adapter Surge Suppression |
Use Scenario: Shielding Ethernet PHY interface and PoE circuitry from induced transients on outdoor cabling. IC Role / Device Role / Timing Role: Bidirectional TVS placed between differential pairs and ground to suppress common-mode surges. Use Value: Symmetric clamping ensures equal protection on both lines; 92.0 V VC prevents damage to 100BASE-TX magnetics and PHY ICs rated ≤100 V. |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters subjected to mains-borne surges per UL 1449. IC Role / Device Role / Timing Role: Clamp across DC output rails to prevent overvoltage propagation to downstream USB or DC-DC converters. Use Value: 1500 W rating handles repeated 6 kV/3 kA surges; halogen-free HM3 construction satisfies UL and regional environmental mandates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ68CA | Lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W) | Suitable for low-energy consumer electronics; insufficient for IEC 61000-4-5 Level 4 industrial surges | Select when board space is critical and surge energy is ≤400 W; verify thermal derating at elevated ambient temperatures. |
| 1.5KE68CA | Through-hole DO-201 package, same 1500 W rating but larger size and manual assembly requirement | Used in legacy industrial power supplies where SMT is not feasible or where mechanical robustness is prioritized | Choose for through-hole prototyping or high-vibration environments where SMT solder joint reliability is a concern. |
Compared with SMAJ68CA and 1.5KE68CA, the 1.5SMC68CAHM3/I delivers identical bidirectional clamping performance at 68 V with superior thermal management (RθJL = 15 °C/W) and AEC-Q101 qualification - making it the preferred choice for automotive and high-reliability SMT designs requiring validated surge immunity.
Availability
1.5SMC68CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom line interfaces, and consumer power adapter designs requiring stable component supply, AEC-Q101 validation, and halogen-free compliance.
Supply support for 1.5SMC68CAHM3/I 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 was developed to deliver high-power, surface-mount transient suppression for automotive, industrial, and telecom systems where space, thermal performance, and AEC-Q101 compliance are mandatory design constraints.
FAQ
What does the 'HM3' suffix indicate in 1.5SMC68CAHM3/I?
The 'HM3' suffix in 1.5SMC68CAHM3/I denotes halogen-free, RoHS-compliant construction with full AEC-Q101 qualification. It confirms compliance with JEDEC J-STD-20 moisture sensitivity level 1, JESD201 Class 2 whisker resistance, and automotive-grade reliability testing - distinguishing it from commercial-grade M3 or E3 variants.
Is 1.5SMC68CAHM3/I unidirectional or bidirectional?
The 'CA' in 1.5SMC68CAHM3/I explicitly identifies it as a bidirectional Transient Voltage Suppressor. Unlike 'A' suffix parts, it provides symmetrical clamping in both polarities - essential for protecting AC-coupled signals, differential buses, or floating supply rails where polarity reversal may occur.
What is the clamping voltage of 1.5SMC68CAHM3/I at its rated peak pulse current?
The 1.5SMC68CAHM3/I has a maximum clamping voltage (VC) of 92.0 V at its rated peak pulse current (IPPM) of 16.3 A, measured under the standard 10/1000 μs double-exponential waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events.
Can 1.5SMC68CAHM3/I be used in place of 1.5SMC68AHE3/I?
No - 1.5SMC68AHE3/I is unidirectional, while 1.5SMC68CAHM3/I is bidirectional. Substituting them requires verifying circuit polarity constraints: using the bidirectional 1.5SMC68CAHM3/I in a unidirectional design may cause unintended conduction, whereas replacing 1.5SMC68CAHM3/I with a unidirectional part leaves one polarity unprotected.
What PCB pad layout is recommended for optimal thermal performance of 1.5SMC68CAHM3/I?
Vishay specifies a minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad area per terminal for 1.5SMC68CAHM3/I to achieve its rated 1500 W peak pulse power. Reducing pad size increases thermal resistance and requires derating per Figure 2 in datasheet 88303 - critical for sustained surge duty cycles in automotive ECUs.
1.5SMC68CAHM3/I 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:
- Discontinued at Digi-Key
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC68CAHM3/I FAQ
1.How can I place an order for 1.5SMC68CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC68CAHM3/I 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 1.5SMC68CAHM3/I reliable?
The price and inventory of 1.5SMC68CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC68CAHM3/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC68CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC68CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC68CAHM3/I?
1.5SMC68CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC68CAHM3/I 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 1.5SMC68CAHM3/I?
For technical support, including 1.5SMC68CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC68CAHM3/I requirements.
6.How does Aetrix verify that 1.5SMC68CAHM3/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC68CAHM3/I 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 1.5SMC68CAHM3/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC68CAHM3/I?
All 1.5SMC68CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC68CAHM3/I, 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 1.5SMC68CAHM3/I part is unused and in its original packaging.
Return procedure for 1.5SMC68CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC68CAHM3/I Tags
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