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Vishay General Semiconductor - Diodes Division SM15T68CAHE3_A/I
- Part No.:
- SM15T68CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T68CAHE3_A/I.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,116
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Product details
Overview
SM15T68CAHE3_A/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 IPPM. It provides robust protection for automotive sensor signal lines against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T68CAHE3_A/I datasheet, SM15T68CAHE3_A/I pinout, SM15T68CAHE3_A/I application, or SM15T68CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VWM ≈ 1.58), and compatibility with high-impedance transient sources in automotive ECUs and industrial I/O modules.
Technical Context
This bidirectional TVS diode operates symmetrically across both polarities, with breakdown voltage VBR of 64.6–71.4 V (measured at 1 mA IT) and maximum reverse leakage ID ≤ 1.0 μA at VWM. Its clamping behavior under 10/1000 μs surge ensures predictable voltage limiting during ESD and surge events.
Thermal design relies on RθJL = 15 °C/W junction-to-lead resistance and derating above TA = 25 °C per Fig. 2; it sustains TJ up to +150 °C and meets MSL Level 1 (260 °C reflow peak). The glass-passivated junction and matte tin-plated leads support automated SMT assembly and long-term reliability in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58.1 V - Maximum continuous reverse operating voltage before significant leakage; defines safe working margin below clamping threshold. |
| VBR (min/max) | 64.6 V / 71.4 V - Breakdown occurs within this range at 1 mA test current; ensures consistent turn-on across production lots. |
| VC @ IPPM | 92.0 V at 16.3 A - Clamped voltage during 10/1000 μs surge; limits downstream IC stress to sub-100 V level. |
| PPPM | 1500 W - Peak pulse power handling with 10/1000 μs waveform; suitable for IEC 61000-4-5 Level 4 (4 kV) threat mitigation. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive locations and industrial enclosures. |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint; compatible with standard SMT pick-and-place and reflow profiles. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
SM15T68CAHE3_A/I is a bidirectional device in SMC (DO-214AB) package with no polarity marking; both terminals are functionally identical and interchangeable. The case conforms to JEDEC DO-214AB mechanical standard with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as anode or cathode depending on instantaneous polarity; no DC bias dependency. |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; symmetrical conduction enables placement without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without external polarity management. |
| 1500 W peak pulse rating | Withstands IEC 61000-4-5 4 kV surge (2 Ω source) without degradation when mounted on 8 mm × 8 mm copper pads. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS sensor interfaces requiring zero-failure field performance. |
| Low clamping ratio (VC/VWM) | 1.58 ratio (92.0 V / 58.1 V) minimizes overvoltage exposure to protected ICs compared to higher-ratio alternatives. |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C peak without moisture-induced popcorning or delamination. |
Applications
| Automotive Sensor Protection | Industrial I/O Line Protection |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) in engine control units exposed to load-dump and inductive kickback. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and ground, absorbing transients before they reach the protected ASIC. Use Value: Prevents latch-up or gate oxide damage in 5 V/12 V sensor interface ICs by limiting excursion to ≤92 V during 10/1000 μs surges. |
Use Scenario: Safeguarding RS-485 transceiver inputs in factory automation PLCs connected to long cable runs subject to lightning-induced surges. IC Role / Device Role / Timing Role: Primary transient suppression element on differential pair, shunting surge energy to chassis ground. Use Value: Maintains signal integrity by clamping common-mode transients to <95 V while preserving <1 pF junction capacitance at 0 V bias. |
| Consumer Power Adapter Input | Telecom DSL Line Interface |
|
Use Scenario: Secondary-side overvoltage protection in USB-C PD adapters where secondary-side MOSFETs require safeguarding against reflected transients. IC Role / Device Role / Timing Role: Fast-response shunt protector across output rails, triggered within nanoseconds of overvoltage onset. Use Value: Limits fault voltage to 92 V during 1500 W surges, preventing secondary-side controller IC destruction without adding series impedance. |
Use Scenario: Front-end protection of ADSL/VDSL line drivers interfacing with outside plant wiring vulnerable to induced surges. IC Role / Device Role / Timing Role: Bidirectional clamp on tip/ring lines referenced to telecom ground, compliant with GR-1089-CORE requirements. Use Value: Achieves 1500 W surge handling with <100 ns response time, meeting Telcordia Class B (4 kV) immunity without compromising line balance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ64A-E3/57T | Unidirectional, lower PPPM (400 W), VWM = 64 V, VC = 103 V @ 3.5 A | Limited to DC-biased lines; insufficient for AC or floating signals without external biasing. | Select only for cost-sensitive, low-energy unidirectional protection where 1500 W rating is unnecessary. |
| SMCJ64CAHE3_A/I | Bidirectional, same VWM/VC specs, but 3000 W PPPM rating and larger SMC package variant (DO-214AB with heavier leads) | Higher surge margin for mission-critical systems; requires same PCB footprint but higher thermal mass. | Choose when system-level surge testing exceeds IEC 61000-4-5 Level 4 or when extended lifetime under repeated stress is required. |
Compared with SMAJ64A-E3/57T and SMCJ64CAHE3_A/I, SM15T68CAHE3_A/I delivers optimal balance of AEC-Q101 qualification, 1500 W surge capacity, and compact SMC footprint-making it ideal for space-constrained automotive and industrial designs where full 3000 W headroom is not mandated.
Availability
SM15T68CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial I/O protection, and telecom line driver circuits requiring stable component supply with AEC-Q101 traceability and RoHS compliance.
Supply support for SM15T68CAHE3_A/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, 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, low-inductance packaging, and precise clamping to protect sensitive electronics from lightning and switching surges.
FAQ
What does the "CA" suffix indicate in SM15T68CAHE3_A/I?
The "CA" suffix in SM15T68CAHE3_A/I denotes a bidirectional configuration, meaning the device clamps voltage transients equally in both polarities without requiring external polarity alignment. This distinguishes it from unidirectional variants (e.g., SM15T68A) and makes SM15T68CAHE3_A/I suitable for AC-coupled or floating signal paths such as LIN bus or RS-485 differential pairs.
Is SM15T68CAHE3_A/I qualified for automotive use?
Yes, SM15T68CAHE3_A/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3", which designates RoHS-compliant and AEC-Q101 qualified versions. This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, validating its use in automotive powertrain, body electronics, and ADAS sensor modules.
What is the clamping voltage of SM15T68CAHE3_A/I under a 10/1000 μs surge?
The clamping voltage VC of SM15T68CAHE3_A/I is 92.0 V at a peak pulse current IPPM of 16.3 A with a 10/1000 μs waveform. This value is measured per Figure 1 in the Vishay datasheet (Doc. #88380) and represents the maximum voltage seen by protected circuitry during standardized surge events.
Does SM15T68CAHE3_A/I have polarity markings on the package?
No, SM15T68CAHE3_A/I has no polarity markings because it is a bidirectional TVS diode. Both terminals are functionally identical, and the device operates symmetrically regardless of orientation. This eliminates placement errors during automated assembly and simplifies layout for differential or floating signal lines.
What is the thermal resistance from junction to lead (RθJL) for SM15T68CAHE3_A/I?
The thermal resistance from junction to lead (RθJL) for SM15T68CAHE3_A/I is 15 °C/W, as specified in the Thermal Characteristics table of the Vishay SM15T Series datasheet. This parameter supports thermal modeling when mounting on PCB copper pads and informs derating calculations for sustained power dissipation in high-ambient-temperature environments.
SM15T68CAHE3_A/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:
- 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:
- -
- 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_A/I FAQ
1.How can I place an order for SM15T68CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T68CAHE3_A/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 SM15T68CAHE3_A/I reliable?
The price and inventory of SM15T68CAHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T68CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SM15T68CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T68CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T68CAHE3_A/I?
SM15T68CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T68CAHE3_A/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 SM15T68CAHE3_A/I?
For technical support, including SM15T68CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T68CAHE3_A/I requirements.
6.How does Aetrix verify that SM15T68CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SM15T68CAHE3_A/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 SM15T68CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SM15T68CAHE3_A/I?
All SM15T68CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM15T68CAHE3_A/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 SM15T68CAHE3_A/I part is unused and in its original packaging.
Return procedure for SM15T68CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T68CAHE3_A/I Tags
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