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Vishay General Semiconductor - Diodes Division SM15T68CA-E3/57T
- Part No.:
- SM15T68CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T68CA-E3/57T.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:944
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Product details
Overview
SM15T68CA-E3/57T 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), 58.1 V stand-off voltage (VWM), 64.6–71.4 V breakdown voltage (VBR), and clamps to ≤92.0 V at 16.3 A peak pulse current. It protects signal lines and power rails in automotive sensor units against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T68CA-E3/57T datasheet, SM15T68CA-E3/57T pinout, SM15T68CA-E3/57T application, or SM15T68CA-E3/57T equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (92.0 V / 64.6 V ≈ 1.42), AEC-Q101 qualification eligibility, thermal resistance (RθJA = 75 °C/W), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SM15T68CA-E3/57T operates as a bidirectional avalanche diode, symmetrically clamping voltage transients above ±64.6 V in either polarity. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1 μA at VWM), while low inductance supports fast response to sub-microsecond threats like ESD and switching spikes.
Designed for high-impedance source environments, it sustains 1500 W peak pulse power under standardized 10/1000 μs waveform conditions when mounted per recommended pad layout. Failure mode under overstress is short-circuit, aligning with IEC 61000-4-5 system-level surge protection requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58.1 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working margin for protected line. |
| VBR min/max | 64.6 V / 71.4 V at 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on within spec across process variation. |
| VC @ IPPM | 92.0 V at 16.3 A (10/1000 μs) - Clamping voltage under worst-case surge; determines maximum stress seen by downstream ICs. |
| PPPM | 1500 W - Peak transient power handling capacity; validates suitability for lightning surge (IEC 61000-4-5 Level 3/4) and motor-switching events. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance; informs derating needed above 25 °C ambient for sustained reliability. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments with proper board thermal design. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic case meeting UL 94 V-0; matte tin-plated leads, J-STD-002 solderable; no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | One terminal of symmetrical avalanche junction; conducts during negative-going surges. |
| Cathode | Transient current entry (positive polarity) | Other terminal of symmetrical avalanche junction; conducts during positive-going surges. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Equal VBR and VC performance in both polarities - eliminates need for external polarity management in AC or differential signal lines. |
| 1500 W peak pulse rating | Validated under 10/1000 μs waveform - meets industrial and automotive surge immunity standards without external series impedance. |
| Glass-passivated junction | Stable VBR tolerance and low leakage (<1 μA at VWM) - ensures long-term reliability and minimal standby power loss. |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles - supports high-yield automated assembly without moisture sensitivity concerns. |
| AEC-Q101 qualification path | Base P/NHE3 suffix available - enables direct qualification for automotive powertrain and body electronics applications. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) in engine control modules exposed to load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across signal pair or supply rail to limit transient overvoltage before reaching sensitive interface ICs. Use Value: Clamps 16.3 A surges to ≤92.0 V, maintaining signal integrity and preventing latch-up in 5 V/12 V sensor front-ends. |
Use Scenario: Safeguarding digital input/output channels on programmable logic controllers connected to solenoids, relays, and motor drives. IC Role / Device Role / Timing Role: Transient shunt device installed at connector interface to divert inductive kickback energy away from FPGA or microcontroller GPIOs. Use Value: Withstands 1500 W surges without degradation, enabling robust operation in factory-floor environments with frequent switching noise. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Secondary-side surge suppression on Ethernet PHY power rails and data lines in PoE-powered switches and base stations. IC Role / Device Role / Timing Role: Fast-response bidirectional clamp limiting common-mode transients induced on twisted-pair cabling per IEC 61000-4-5. Use Value: Low clamping ratio (1.42) ensures downstream DC-DC converters remain within absolute maximum ratings during 4 kV surge events. |
Use Scenario: Input-stage protection for AC-DC adapters in smart home hubs and set-top boxes subjected to mains-borne surges. IC Role / Device Role / Timing Role: Primary transient suppressor placed between bridge rectifier output and bulk capacitor to absorb line transients. Use Value: 58.1 V VWM allows use with 48 V nominal DC bus; 92.0 V clamping prevents overvoltage stress on 100 V-rated electrolytic capacitors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ64A-E3/57T | Unidirectional, 64 V VWM, 1500 W, SMA package (smaller footprint, higher RθJA = 110 °C/W) | Requires polarity-aware layout; less suitable for AC or differential signals without external biasing. | Select when space-constrained and unidirectional protection suffices; verify thermal margin due to higher thermal resistance. |
| SMCJ64CA-E3/57T | Bidirectional, 64 V VWM, 1500 W, same SMC package but higher VBR (67.2–74.2 V) and VC (103 V @ 14.6 A) | Higher clamping voltage reduces protection margin for 5 V–12 V systems; identical mechanical fit. | Choose only if system-level testing confirms 103 V clamping is acceptable; otherwise SM15T68CA-E3/57T offers tighter clamping. |
Compared with SMAJ64A-E3/57T and SMCJ64CA-E3/57T, the SM15T68CA-E3/57T delivers superior clamping performance (92.0 V vs. ≥103 V) in a bidirectional configuration, making it optimal for safety-critical or low-voltage signal-line protection where voltage margin is constrained.
Availability
SM15T68CA-E3/57T is available at Aetrix Electronics and suitable for automotive sensor units, industrial PLC I/O modules, and telecom line interfaces requiring stable component supply, RoHS-compliant packaging, and consistent surge immunity performance across production batches.
Supply support for SM15T68CA-E3/57T 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on reliability, precision, and application-specific performance across automotive, industrial, and computing markets.
The SM15T Series targets high-energy transient suppression in harsh environments; its 1500 W rating, AEC-Q101 qualification path, and SMC package reflect design focus on automotive-grade robustness and industrial surge resilience.
FAQ
What is the clamping voltage of SM15T68CA-E3/57T at its rated peak pulse current?
The SM15T68CA-E3/57T clamps to a maximum of 92.0 V at 16.3 A peak pulse current under the standardized 10/1000 μs waveform condition. This value is measured with the device mounted on 8.0 mm × 8.0 mm copper pads per JEDEC guidelines and represents the upper bound of voltage stress imposed on protected circuitry during surge events.
Is SM15T68CA-E3/57T qualified to AEC-Q101?
The SM15T68CA-E3/57T itself is RoHS-compliant and commercial-grade; however, Vishay offers AEC-Q101 qualified versions under the HE3 suffix (e.g., SM15T68CAHE3_A/H). The -E3/57T variant is not AEC-Q101 qualified but shares identical electrical and thermal characteristics with the qualified version, differing only in test documentation and traceability.
What does the "CA" suffix indicate in SM15T68CA-E3/57T?
The "CA" suffix in SM15T68CA-E3/57T denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SM15T68A), it has no cathode marking and functions identically regardless of polarity applied across its terminals.
What is the maximum operating temperature for SM15T68CA-E3/57T?
The SM15T68CA-E3/57T has a maximum junction temperature (TJ) of +150 °C and an operating junction/storage temperature range of -65 °C to +150 °C. Derating of peak pulse power begins above 25 °C ambient, following the curve in Figure 2 of Vishay document 88380, with full rating maintained only at TA ≤ 25 °C.
How does SM15T68CA-E3/57T compare to SMAJ64A-E3/57T in terms of package and thermal performance?
The SM15T68CA-E3/57T uses the larger SMC (DO-214AB) package with RθJA = 75 °C/W, whereas SMAJ64A-E3/57T uses the smaller SMA (DO-214AC) package with RθJA = 110 °C/W. This gives SM15T68CA-E3/57T better thermal dissipation under sustained surge conditions and greater margin for high-temperature PCB layouts.
SM15T68CA-E3/57T 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:
- 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)
SM15T68CA-E3/57T FAQ
1.How can I place an order for SM15T68CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T68CA-E3/57T 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 SM15T68CA-E3/57T reliable?
The price and inventory of SM15T68CA-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T68CA-E3/57T is usually 5 days.
3.What payment methods are accepted for SM15T68CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T68CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T68CA-E3/57T?
SM15T68CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T68CA-E3/57T 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 SM15T68CA-E3/57T?
For technical support, including SM15T68CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T68CA-E3/57T requirements.
6.How does Aetrix verify that SM15T68CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T68CA-E3/57T 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 SM15T68CA-E3/57T meets industry standards.
7.What is the process for return or replacement of SM15T68CA-E3/57T?
All SM15T68CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T68CA-E3/57T, 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 SM15T68CA-E3/57T part is unused and in its original packaging.
Return procedure for SM15T68CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T68CA-E3/57T Tags
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