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Vishay General Semiconductor - Diodes Division SM15T68CAHE3/57T
- Part No.:
- SM15T68CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T68CAHE3/57T.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,753
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Product details
Overview
SM15T68CAHE3/57T 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), 68 V standoff voltage (VWM = 58.1 V), and clamping voltage of 92.0 V at 16.3 A IPPM. It provides robust protection for automotive sensor signal lines against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T68CAHE3/57T datasheet, SM15T68CAHE3/57T pinout, SM15T68CAHE3/57T application, or SM15T68CAHE3/57T equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VWM ≈ 1.59), and compatibility with high-impedance transient sources in automotive ECUs and industrial I/O interfaces.
Technical Context
This device operates as a voltage-clamped surge protector with symmetrical breakdown behavior in both polarities due to its bidirectional construction. Its 1500 W peak pulse rating applies under standardized 10/1000 μs waveform conditions, and it exhibits a maximum clamping voltage of 92.0 V at 16.3 A peak pulse current - critical for limiting stress on downstream MOSFETs or CAN transceivers.
Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15 °C/W, supporting operation up to TJ = 150 °C. The device is AEC-Q101 qualified (HE3 suffix), RoHS-compliant, and meets J-STD-020 MSL Level 1 with 260 °C reflow peak temperature tolerance.
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 - guaranteed breakdown threshold range at 1 mA test current |
| VC @ IPPM | 92.0 V at 16.3 A - clamping voltage limits downstream IC stress during surge events |
| PPPM | 1500 W - peak transient energy absorption capacity per 10/1000 μs waveform |
| TJ max. | +150 °C - enables use in under-hood automotive environments without derating |
| Package | SMC (DO-214AB) - surface-mount package with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
| AEC-Q101 | Qualified - validated for automotive reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
SM15T68CAHE3/57T uses the SMC (DO-214AB) package: a surface-mount, bidirectional TVS diode with no polarity marking. Leads are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Connects to protected line; conducts during negative surges |
| Cathode | Transient return path (bidirectional) | Connects to protected line; conducts during positive surges - identical electrical role to Anode in CA devices |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 1500 W peak pulse power | Withstands lightning-induced transients (IEC 61000-4-5 Level 4) on automotive CAN/FlexRay lines |
| Low clamping ratio (VC/VWM ≈ 1.59) | Minimizes overvoltage exposure to sensitive receivers while maintaining margin above VWM |
| AEC-Q101 qualification | Validated for automotive under-hood applications including thermal shock, humidity, and lifetime reliability |
| MSL Level 1, 260 °C peak | Supports standard lead-free reflow assembly without pre-baking or special handling |
Applications
| Automotive Sensor Interface Protection | Industrial I/O Line Surge Suppression |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control modules exposed to load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between sensor output and microcontroller ADC input. Use Value: Limits transient voltage to ≤92.0 V, preventing latch-up or gate oxide damage in 3.3 V/5 V ADC front-ends. | Use Scenario: Shielding RS-485 transceiver data lines in factory automation PLCs from motor switching noise and ground bounce. IC Role / Device Role / Timing Role: Parallel-connected TVS across differential bus pair (A/B) to shunt common-mode surges. Use Value: Maintains signal integrity by clamping transients within 10/1000 μs window without affecting 10 Mbps data rate. |
| Automotive CAN Bus Node Protection | Consumer Appliance Motor Driver Feedback Protection |
Use Scenario: Safeguarding CANH/CANL pins of automotive body control modules against ESD (IEC 61000-4-2 ±25 kV) and EFT (IEC 61000-4-4 ±4 kV). IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed directly at connector entry point before CAN transceiver. Use Value: Clamps fast transients below 92.0 V while adding <10 pF capacitance to preserve CAN signal edge integrity. | Use Scenario: Protecting hall-effect sensor feedback lines in smart washing machine motor drives subjected to coil back-EMF spikes. IC Role / Device Role / Timing Role: Standoff-rated TVS placed across sensor supply and ground to absorb repetitive 100–500 V inductive spikes. Use Value: Prevents false triggering of motor commutation logic by limiting spike amplitude to safe levels for 5 V logic inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ64CA | 600 W PPPM, 64 V VWM, SMA package (smaller footprint, lower power) | Not AEC-Q101 qualified; limited to commercial-grade consumer/industrial use | Select when space-constrained PCB layout and lower surge threat level permit reduced power rating |
| 1.5KE68CA | 1500 W PPPM, 68 V VWM, DO-204AB (axial leaded) package, higher RθJA | Through-hole mounting only; unsuitable for automated SMT assembly | Select only for legacy through-hole designs where rework or manual assembly is acceptable |
Compared with SMAJ64CA and 1.5KE68CA, SM15T68CAHE3/57T delivers automotive-grade reliability in an SMT-optimized SMC package with verified 1500 W surge handling - making it the preferred choice for new automotive and industrial designs requiring AEC-Q101 compliance and high-volume placement.
Availability
SM15T68CAHE3/57T is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O protection, and consumer appliance motor control systems requiring stable component supply and long-term lifecycle support.
Supply support for SM15T68CAHE3/57T 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 optoelectronics with emphasis on reliability and application-specific performance.
The SM15T Series was engineered specifically for high-energy transient suppression in automotive and industrial environments, combining AEC-Q101 qualification, 1500 W surge capability, and SMC packaging for automated manufacturing.
FAQ
What is the clamping voltage of SM15T68CAHE3/57T at its rated peak pulse current?
The SM15T68CAHE3/57T has a maximum clamping voltage (VC) of 92.0 V at 16.3 A peak pulse current (IPPM), measured under the standard 10/1000 μs waveform. This value ensures downstream components such as CAN transceivers or microcontroller I/O pins remain within safe voltage limits during surge events. The clamping performance is symmetric for both polarities due to its bidirectional construction.
Is SM15T68CAHE3/57T suitable for automotive applications?
Yes, SM15T68CAHE3/57T is AEC-Q101 qualified (indicated by the HE3 suffix) and designed for automotive use. It undergoes rigorous testing for temperature cycling, highly accelerated life testing (HALT), and ESD robustness. Its 1500 W surge rating and 150 °C maximum junction temperature make it appropriate for under-hood and body-control module applications.
What does the "CA" suffix mean in SM15T68CAHE3/57T?
The "CA" suffix in SM15T68CAHE3/57T denotes a bidirectional configuration - meaning the device clamps transients of either polarity equally, with no cathode/anode distinction. Unlike unidirectional variants (e.g., SM15T68A), CA devices have no polarity marking and are used where AC signals or floating references require symmetrical protection.
What is the thermal resistance of SM15T68CAHE3/57T from junction to ambient?
The typical thermal resistance from junction to ambient (RθJA) for SM15T68CAHE3/57T is 75 °C/W, measured on a 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad per terminal. This value assumes standard PCB layout; actual thermal performance improves with larger copper areas or internal plane connections. Junction-to-lead resistance (RθJL) is 15 °C/W.
How does SM15T68CAHE3/57T differ from SM15T68AHE3/57T?
SM15T68CAHE3/57T is bidirectional with symmetrical clamping in both directions and no polarity marking, whereas SM15T68AHE3/57T is unidirectional with a cathode band and conducts only during positive surges. Their VWM (58.1 V), VBR (64.6–71.4 V), and VC (92.0 V) values are identical, but CA devices are required for AC-coupled or floating signal paths like CAN or RS-485 buses.
SM15T68CAHE3/57T 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:
- 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 (SMCJ)
SM15T68CAHE3/57T FAQ
1.How can I place an order for SM15T68CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T68CAHE3/57T 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 SM15T68CAHE3/57T reliable?
The price and inventory of SM15T68CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T68CAHE3/57T is usually 5 days.
3.What payment methods are accepted for SM15T68CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T68CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T68CAHE3/57T?
SM15T68CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T68CAHE3/57T 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 SM15T68CAHE3/57T?
For technical support, including SM15T68CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T68CAHE3/57T requirements.
6.How does Aetrix verify that SM15T68CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T68CAHE3/57T 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 SM15T68CAHE3/57T meets industry standards.
7.What is the process for return or replacement of SM15T68CAHE3/57T?
All SM15T68CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T68CAHE3/57T, 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 SM15T68CAHE3/57T part is unused and in its original packaging.
Return procedure for SM15T68CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T68CAHE3/57T Tags
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