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Vishay General Semiconductor - Diodes Division SM15T68A-M3/57T
- Part No.:
- SM15T68A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T68A-M3/57T.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,649
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Product details
Overview
SM15T68A-M3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 68 V breakdown voltage (64.6–71.4 V), and 92 V maximum clamping voltage at 16.3 A IPPM. It protects MOSFETs, ICs, and sensor signal lines against lightning-induced and inductive-switching transients in automotive and industrial power electronics.
For engineers reviewing the SM15T68A-M3/57T datasheet, SM15T68A-M3/57T pinout, SM15T68A-M3/57T application, or SM15T68A-M3/57T equivalent, key selection criteria include clamping voltage vs. protected device VDS(max), standoff voltage margin relative to DC rail, thermal resistance (RθJA = 75 °C/W), and halogen-free RoHS compliance per M3 suffix.
Technical Context
The SM15T68A-M3/57T uses a glass-passivated silicon junction optimized for low-inductance transient suppression. Its unidirectional polarity features a cathode band marking and operates with reverse-biased clamping action during overvoltage events.
It delivers 1500 W peak pulse power under standardized 10/1000 μs waveform conditions, with clamping performance validated at 16.3 A IPPM and thermal derating per Fig. 2 above TA = 25 °C. Junction temperature range spans −65 °C to +150 °C, and it meets J-STD-020 MSL Level 1 reflow profile (260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 64.6 V / 71.4 V - Ensures reliable breakdown onset above 58.1 V standoff while maintaining margin below protected circuit's absolute max rating. |
| VC @ IPPM | 92.0 V @ 16.3 A - Clamps transients to safe level for 60–80 V-rated MOSFETs or logic interfaces. |
| PPPM (10/1000 μs) | 1500 W - Handles high-energy lightning surges (IEC 61000-4-5 Level 4) on power or I/O lines. |
| RθJA | 75 °C/W - Requires ≥8.0 mm × 8.0 mm copper pad per terminal for full power derating at TA = 50 °C. |
| Package | SMC (DO-214AB) - Standardized surface-mount footprint compatible with automated placement and reflow soldering. |
| Compliance | Halogen-free, RoHS-compliant (M3 suffix), JESD201 Class 2 whisker resistant - Suitable for automotive and industrial production environments. |
Pinout & Package
SM15T68A-M3/57T is housed in an SMC (DO-214AB) plastic package with matte tin-plated leads. The cathode is marked by a band on the body; anode is unmarked. Mounting requires minimum 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal per datasheet Fig. 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to system ground or low-side reference in TVS configuration | Must be routed to lowest-impedance ground plane to minimize clamping overshoot during fast transients. |
| Cathode | Current exit terminal in forward bias; connected to protected line (e.g., 48 V rail or CAN_H) | Band-marked end; reverse-biased during clamping - voltage at this node is clamped to ≤92 V during surge. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 combination wave surges without cascaded staging. |
| Low clamping ratio (VC/VBR ≈ 1.32) | Minimizes overvoltage stress on downstream components compared to higher-ratio TVS devices. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking - reduces manufacturing overhead. |
| 75 °C/W junction-to-ambient thermal resistance | Supports continuous 6.5 W power dissipation with proper PCB copper area, enabling use in thermally constrained layouts. |
Applications
| Automotive Power Distribution | Industrial Motor Drive I/O Protection |
|---|---|
Use Scenario: Protecting 48 V battery rail inputs in ADAS ECUs against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC-DC converter input stage. Use Value: Clamps 100 V+ transients to ≤92 V within nanoseconds, preventing damage to 60 V-rated buck controller ICs. |
Use Scenario: Shielding analog current-sense amplifier inputs from switching noise generated by 3-phase IGBT inverters. IC Role / Device Role / Timing Role: Low-capacitance TVS on shunt resistor feedback path to preserve signal integrity. Use Value: Limits voltage excursions to <92 V without adding >10 pF parasitic capacitance that would degrade bandwidth. |
| Telecom Base Station DC Feeds | Consumer Appliance Control Board Inputs |
Use Scenario: Safeguarding -48 V telecom power supply inputs against induced surges from nearby lightning strikes. IC Role / Device Role / Timing Role: Primary-level TVS on input bulk capacitor rail before upstream EMI filter. Use Value: Absorbs 1500 W surge energy without failure, maintaining short-circuit fail-safe behavior per design requirement. |
Use Scenario: Guarding microcontroller GPIOs connected to front-panel pushbuttons exposed to ESD and relay coil kickback. IC Role / Device Role / Timing Role: Point-of-use TVS on each button trace, mounted adjacent to connector. Use Value: Responds in <1 ns to 8 kV HBM ESD events, limiting voltage to <92 V before MCU IO clamp diodes conduct. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ68A-E3/52T | Lower PPPM (400 W), same VBR (64.6–71.4 V), SMA package (smaller thermal mass) | Limited to lower-energy threats (IEC 61000-4-2 ESD only); unsuitable for lightning surges | Select when space-constrained and threat level is limited to board-level ESD, not system-level surges. |
| SMCJ68A-M3/57T | Same SMC package, identical VBR/VC specs, but rated for 3000 W PPPM (10/1000 μs) | Higher surge margin enables longer lifetime in harsh environments (e.g., outdoor industrial gateways) | Choose when extended surge endurance or future-proofing against higher threat levels is required. |
Compared with SMAJ68A-E3/52T, SM15T68A-M3/57T provides 275 % more surge energy handling in the same footprint; versus SMCJ68A-M3/57T, it trades half the peak power rating for tighter cost and supply-chain alignment where 1500 W suffices.
Availability
SM15T68A-M3/57T is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive I/O protection, and telecom base station DC feeds requiring stable component supply, halogen-free compliance, and AEC-Q101-aligned reliability.
Supply support for SM15T68A-M3/57T 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 high-reliability, high-power, and automotive-qualified components.
The SM15T Series was developed specifically for surface-mount transient suppression in demanding power electronics applications, balancing high pulse power, low clamping voltage, and manufacturability in SMC packaging.
FAQ
What is the maximum clamping voltage of the SM15T68A-M3/57T under standard test conditions?
The SM15T68A-M3/57T has a maximum clamping voltage (VC) of 92.0 V at 16.3 A peak pulse current (IPPM), measured using the 10/1000 μs waveform per IEC 61000-4-5. This value is guaranteed across the operating temperature range and defines the upper voltage limit imposed on protected circuits during surge events. The SM15T68A-M3/57T maintains this clamping performance with minimal variation due to its glass-passivated junction and low-inductance SMC package.
Is the SM15T68A-M3/57T suitable for automotive applications?
Yes - the SM15T68A-M3/57T is halogen-free and RoHS-compliant (M3 suffix), and shares the same die and qualification baseline as AEC-Q101-qualified variants (e.g., SM15T68AHM3_A/H). While the SM15T68A-M3/57T itself carries no AEC-Q101 certificate, its construction, testing, and process flow align with automotive-grade requirements. The SM15T68A-M3/57T is widely deployed in non-safety-critical automotive subsystems such as body control modules and infotainment power rails.
What is the standoff voltage (VWM) rating for the SM15T68A-M3/57T?
The SM15T68A-M3/57T has a maximum working peak reverse voltage (VWM) of 58.1 V, meaning it remains in high-impedance blocking state up to this DC or repetitive AC voltage level. This provides ~17 % margin below the nominal 68 V breakdown threshold (VBR min = 64.6 V), ensuring stable operation on 48 V systems with ripple and tolerance. The SM15T68A-M3/57T leakage current at VWM is ≤1.0 μA at 25 °C, minimizing standby power loss.
Does the SM15T68A-M3/57T have bidirectional capability?
No - the SM15T68A-M3/57T is a unidirectional TVS diode, indicated by the "A" suffix (not "CA"). It conducts only when reverse-biased beyond its breakdown voltage; forward conduction follows standard silicon diode behavior. For bidirectional protection (e.g., on AC lines or differential buses), the SM15T68CA-M3/57T variant must be used. The SM15T68A-M3/57T cathode is marked with a band, and polarity must be observed during PCB layout.
What is the thermal resistance and power derating behavior of the SM15T68A-M3/57T?
The SM15T68A-M3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31″ × 0.31″ copper pads per terminal. Its steady-state power dissipation (PD) is 6.5 W at TA = 50 °C, derating linearly to zero at TJ = 150 °C. The SM15T68A-M3/57T thermal performance follows Fig. 2 in datasheet 88380, with 100 % power allowed only up to TA = 25 °C and 50 % at TA = 75 °C.
SM15T68A-M3/57T 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:
- 1
- Bidirectional Channels:
- -
- 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)
SM15T68A-M3/57T FAQ
1.How can I place an order for SM15T68A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T68A-M3/57T 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 SM15T68A-M3/57T reliable?
The price and inventory of SM15T68A-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T68A-M3/57T is usually 5 days.
3.What payment methods are accepted for SM15T68A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T68A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T68A-M3/57T?
SM15T68A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T68A-M3/57T 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 SM15T68A-M3/57T?
For technical support, including SM15T68A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T68A-M3/57T requirements.
6.How does Aetrix verify that SM15T68A-M3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T68A-M3/57T 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 SM15T68A-M3/57T meets industry standards.
7.What is the process for return or replacement of SM15T68A-M3/57T?
All SM15T68A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T68A-M3/57T, 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 SM15T68A-M3/57T part is unused and in its original packaging.
Return procedure for SM15T68A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T68A-M3/57T Tags
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