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Vishay General Semiconductor - Diodes Division SM15T68CAHM3/I
- Part No.:
- SM15T68CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T68CAHM3/I.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,219
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Product details
Overview
SM15T68CAHM3/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) 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 SM15T68CAHM3/I datasheet, SM15T68CAHM3/I pinout, SM15T68CAHM3/I application, or SM15T68CAHM3/I equivalent, key selection criteria include bidirectional clamping behavior, AEC-Q101 qualification, halogen-free RoHS compliance, and verified 1500 W surge capability under standardized 10/1000 μs waveform conditions.
Technical Context
This device operates as a voltage-clamped overvoltage protection element with symmetrical breakdown in both polarities due to its bidirectional construction. Its glass-passivated junction ensures stable leakage performance (<1 μA at VWM) and low dynamic impedance during transient events.
Thermal design relies on RθJA = 75 °C/W (typ.) and RθJL = 15 °C/W (typ.), enabling reliable operation up to TJ = 150 °C. The SMC package supports automated placement and meets MSL Level 1 (260 °C peak reflow).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58.1 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 64.6 V / 71.4 V at 1 mA - Confirmed breakdown threshold range for bidirectional conduction |
| VC @ IPPM | 92.0 V at 16.3 A (10/1000 μs) - Clamping voltage limiting downstream circuit stress during surge |
| PPPM | 1500 W - Peak transient power handling capacity per JEDEC standard waveform |
| IFSM | Not applicable - Bidirectional device has no forward surge rating |
| TJ max | 150 °C - Maximum junction temperature defining thermal derating envelope |
| Package | SMC (DO-214AB) - Surface-mount outline with 0.320" x 0.246" footprint and matte tin-plated leads |
Pinout & Package
SMC (DO-214AB) package with two terminals: symmetrical bidirectional configuration means neither terminal is designated anode or cathode; no polarity marking on device body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Transient input/output node | Connected to protected line (e.g., CAN_H or RS-485 A); conducts equally in both directions during overvoltage |
| Terminal 2 | Transient input/output node | Connected to reference plane (e.g., ground or complementary line); completes symmetrical clamping path |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of differential or AC-coupled lines without polarity concerns |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for Tier-1 automotive and industrial OEM programs |
| Low clamping ratio (VC/VBR) | 92.0 V / 64.6 V ≈ 1.42 - Minimizes overvoltage exposure to protected ICs during surge events |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C peak without moisture-induced failure |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs from load-dump and jump-start transients in engine control modules. IC Role / Device Role: Bidirectional voltage clamp placed between signal line and chassis ground. Use Value: Limits transient voltage to ≤92.0 V, preventing damage to transceivers rated for 70 V absolute maximum. |
Use Scenario: Safeguarding RS-485 transceivers on factory-floor communication buses exposed to motor drive noise. IC Role / Device Role: Differential-line TVS across A/B bus lines to suppress common-mode surges. Use Value: 1500 W surge rating handles repetitive 1 kV/500 A lightning-induced transients per IEC 61000-4-5. |
| Consumer Power Adapter Input | Telecom DSL Line Protection |
Use Scenario: Input-stage surge suppression on AC-DC adapters subjected to mains-borne transients. IC Role / Device Role: Bidirectional clamp between L/N lines or L/N-to-ground paths. Use Value: Withstands 10/1000 μs surges up to 16.3 A while maintaining <1 μA leakage at 58.1 V standby. |
Use Scenario: Primary protection for DSL line cards interfacing with outside plant wiring. IC Role / Device Role: Paired bidirectional TVS devices on tip/ring lines referenced to telecom ground. Use Value: 92.0 V clamping ensures compatibility with ADSL2+ receivers requiring <100 V surge tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ64CA | Lower PPPM (400 W), same VWM (55.1 V), SMA package (smaller thermal mass) | Not AEC-Q101 qualified; limited to commercial-grade consumer/industrial use | Select when cost sensitivity outweighs automotive qualification and surge margin requirements |
| SMCJ64CA | Higher PPPM (1500 W), identical VWM (55.1 V), same SMC package but non-halogen-free M3 suffix only | Lacks halogen-free certification; not approved for automotive programs requiring HM3 compliance | Choose when halogen-free requirement is waived but AEC-Q101 and 1500 W capability remain essential |
Compared with SMAJ64CA and SMCJ64CA, SM15T68CAHM3/I uniquely combines AEC-Q101 qualification, halogen-free construction, and 68 V nominal standoff-making it the only option meeting Tier-1 automotive sourcing mandates for 12 V system protection without layout or BOM revision.
Availability
SM15T68CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor units, industrial RS-485 networks, and telecom DSL line cards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SM15T68CAHM3/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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices with emphasis on high-reliability power and protection solutions.
The SM15T Series targets high-energy transient suppression in harsh environments-specifically engineered for automotive, industrial, and telecom infrastructure where 1500 W surge immunity and AEC-Q101 validation are mandatory.
FAQ
What does the "CA" suffix indicate in SM15T68CAHM3/I?
The "CA" suffix denotes a bidirectional configuration, meaning SM15T68CAHM3/I provides symmetrical clamping in both voltage polarities. This eliminates polarity concerns during board layout and enables protection of AC-coupled or differential signal lines such as CAN, RS-485, or telecom tip/ring pairs without requiring orientation verification.
Is SM15T68CAHM3/I qualified for automotive applications?
Yes, SM15T68CAHM3/I carries the HM3 suffix, confirming it is halogen-free, RoHS-compliant, and AEC-Q101 qualified. This certification covers stress tests including temperature cycling, highly accelerated life testing (HALT), and ESD robustness-validating its suitability for under-hood and powertrain ECUs per automotive OEM requirements.
What is the clamping voltage of SM15T68CAHM3/I at rated surge current?
SM15T68CAHM3/I clamps to 92.0 V when subjected to a 10/1000 μs transient pulse at its rated peak pulse current of 16.3 A. This value is measured per JEDEC standards and defines the maximum voltage imposed on protected circuitry during worst-case surge events.
Does SM15T68CAHM3/I require heatsinking for standard operation?
No external heatsink is required for SM15T68CAHM3/I under typical surge conditions, as its RθJA of 75 °C/W and RθJL of 15 °C/W allow adequate thermal dissipation through PCB copper pads. Mounting on minimum recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal ensures compliance with thermal derating curves in the datasheet.
How does the "HM3" suffix differ from "M3" or "E3" in SM15T68CAHM3/I?
The "HM3" suffix in SM15T68CAHM3/I specifies halogen-free, RoHS-compliant construction with AEC-Q101 qualification. In contrast, "M3" indicates halogen-free and RoHS compliance only (no automotive qualification), while "E3" denotes RoHS compliance without halogen-free or AEC-Q101 status-making HM3 the sole variant approved for automotive production programs.
SM15T68CAHM3/I 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:
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SM15T68CAHM3/I FAQ
1.How can I place an order for SM15T68CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T68CAHM3/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 SM15T68CAHM3/I reliable?
The price and inventory of SM15T68CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T68CAHM3/I is usually 5 days.
3.What payment methods are accepted for SM15T68CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T68CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T68CAHM3/I?
SM15T68CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T68CAHM3/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 SM15T68CAHM3/I?
For technical support, including SM15T68CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T68CAHM3/I requirements.
6.How does Aetrix verify that SM15T68CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SM15T68CAHM3/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 SM15T68CAHM3/I meets industry standards.
7.What is the process for return or replacement of SM15T68CAHM3/I?
All SM15T68CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM15T68CAHM3/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 SM15T68CAHM3/I part is unused and in its original packaging.
Return procedure for SM15T68CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T68CAHM3/I Tags
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