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Vishay General Semiconductor - Diodes Division SM15T68A-M3/9AT
- Part No.:
- SM15T68A-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T68A-M3/9AT.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,928
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Product details
Overview
SM15T68A-M3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 68 V breakdown voltage (min 64.6 V, max 71.4 V), and 92 V clamping voltage at 16.3 A peak pulse current. It protects MOSFETs and ICs in automotive power supply lines against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T68A-M3/9AT datasheet, SM15T68A-M3/9AT pinout, SM15T68A-M3/9AT application, or SM15T68A-M3/9AT equivalent, key selection criteria include its 58.1 V stand-off voltage, 1.0 μA reverse leakage at VWM, halogen-free RoHS-compliant construction, and AEC-Q101 qualification readiness via HM3 suffix variants.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, designed to shunt transient energy above 64.6 V while maintaining low dynamic impedance. Its glass-passivated junction ensures stable breakdown behavior under repetitive surge stress.
Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15 °C/W, with maximum junction temperature of +150 °C and MSL Level 1 rating (260 °C peak reflow). It sustains 200 A non-repetitive forward surge (10 ms half-sine) and derates linearly above TA = 25 °C per Fig. 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 64.6 V / 71.4 V - defines precise clamping onset threshold under 1 mA test current |
| VWM | 58.1 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 92.0 V @ 16.3 A - clamped voltage during 10/1000 μs transient, limiting downstream stress |
| PPPM | 1500 W - peak pulse power handling capability for lightning and switching surge immunity |
| IFSM | 200 A - surge current rating for 10 ms half-sine waveform, critical for motor drive protection |
| TJ max | +150 °C - enables operation in under-hood automotive environments and industrial enclosures |
| RθJA | 75 °C/W - thermal resistance indicating need for ≥8.0 mm × 8.0 mm copper pads for full power rating |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile, halogen-free, RoHS-compliant, matte tin-plated leads. Cathode identified by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path | Connected to system ground or low-impedance return plane to complete clamping loop |
| Cathode | Protected line connection | Connected to line being protected (e.g., 48 V rail); band denotes this terminal |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 48 V systems |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity |
| Low clamping ratio (VC/VBR ≈ 1.36) | Minimizes overvoltage stress on downstream SiC MOSFETs or gate drivers during clamping |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow without preconditioning or dry-pack requirements |
| Halogen-free & RoHS-compliant (M3 suffix) | Fulfills automotive OEM material compliance mandates (e.g., GMW3172, Ford WSS-M99P9999-A1) |
Applications
| Automotive Power Distribution | Industrial Motor Drive Control |
|---|---|
Use Scenario: Protection of 48 V battery-fed DC/DC converters and load switches in mild-hybrid vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between input rail and chassis ground to absorb load-dump and jump-start transients. Use Value: Withstands 200 A IFSM and clamps to 92 V, preventing damage to 65 V-rated GaN FETs and PMICs. | Use Scenario: Surge suppression on control signal lines feeding IGBT gate drivers in HVAC compressors. IC Role / Device Role / Timing Role: Transient shunt on isolated 24 V logic supply, triggered by inductive kickback from contactor coils. Use Value: 1.0 μA leakage at 58.1 V VWM avoids false triggering; 1500 W rating handles repeated 100 A coil turn-off spikes. |
| Telecom DC Power Feeds | Consumer Appliance Mainboard Protection |
Use Scenario: Input-stage protection on -48 V telecom rectifier outputs exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device on feed line prior to DC/DC regulation, referenced to system ground. Use Value: 92 V clamping ensures downstream 56 V-rated PoE controllers remain within absolute maximum ratings during 10/1000 μs threats. | Use Scenario: Overvoltage safeguard on main 310 V DC bus in variable-speed washing machine inverters. IC Role / Device Role / Timing Role: Secondary-level TVS across bulk capacitor, activated only during rare high-energy transients exceeding MOV clamping. Use Value: Precise 64.6–71.4 V VBR window allows coordination with upstream MOVs and avoids nuisance conduction during normal ripple. |
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-E3/57T | 600 W PPPM, SMA package, VC = 110 V @ 8.2 A, RθJA = 110 °C/W | Limited to lower-energy threats (IEC 61000-4-5 Level 2); unsuitable for 48 V automotive load dump | Select when space-constrained layouts require smaller footprint and threat level is ≤600 W |
| SMCJ68A-M3/9AT | 1500 W PPPM, identical SMC package, VC = 110 V @ 13.7 A, higher clamping voltage | Same mechanical fit but 18 V higher clamping degrades protection margin for 65 V-rated devices | Choose only if board layout forbids redesign and 110 V clamping is acceptable for downstream components |
Compared with SMAJ68A-E3/57T and SMCJ68A-M3/9AT, SM15T68A-M3/9AT delivers superior energy handling in the same SMC footprint while achieving the lowest clamping voltage (92 V) among 68 V-class 1500 W TVS diodes-critical for protecting next-generation 65 V SiC power stages.
Availability
SM15T68A-M3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive control, telecom DC power feeds, and consumer appliance mainboard protection requiring stable component supply and halogen-free compliance.
Supply support for SM15T68A-M3/9AT 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, MOSFETs, and optoelectronics with emphasis on reliability and AEC-Q qualification.
The SM15T Series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where 1500 W surge immunity and precise clamping are mandatory.
FAQ
What is the breakdown voltage tolerance of SM15T68A-M3/9AT?
The SM15T68A-M3/9AT has a specified breakdown voltage range of 64.6 V to 71.4 V at 1.0 mA test current (IT), corresponding to ±5% tolerance about the nominal 68 V rating. This tight VBR window ensures predictable clamping onset and compatibility with 65 V-rated power semiconductors. The value is measured per JEDEC standard after applying a 300 μs square-wave pulse.
Is SM15T68A-M3/9AT suitable for automotive applications?
Yes, SM15T68A-M3/9AT is halogen-free and RoHS-compliant (M3 suffix), and its base family is AEC-Q101 qualified-achieved via HM3 suffix variants (e.g., SM15T68AHM3_A/I). While the M3/9AT variant itself is commercial-grade, it shares identical die, package, and electrical characteristics with qualified versions, making it widely deployed in non-safety-critical automotive subsystems such as body control modules and infotainment power rails.
What is the maximum clamping voltage of SM15T68A-M3/9AT under surge conditions?
The SM15T68A-M3/9AT clamps to a maximum of 92.0 V when subjected to its rated peak pulse current of 16.3 A using the standardized 10/1000 μs waveform. This clamping voltage is guaranteed across temperature and lifetime, and reflects worst-case behavior under worst-case surge conditions defined in IEC 61000-4-5. It directly determines the overvoltage stress imposed on downstream components.
Does SM15T68A-M3/9AT have polarity marking, and how is it oriented in circuit?
Yes, SM15T68A-M3/9AT is unidirectional and features a cathode band marking on the SMC package body. In circuit, the banded end (cathode) connects to the line being protected (e.g., 48 V rail), while the anode connects to ground or low-impedance return. Reverse orientation would prevent proper clamping and may cause catastrophic failure during transient events.
What PCB layout guidance applies to SM15T68A-M3/9AT to achieve full 1500 W rating?
To achieve the full 1500 W peak pulse power rating, SM15T68A-M3/9AT must be mounted on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in the Vishay datasheet Figure 2 derating curve. Smaller pads increase thermal resistance, reducing IPPM capability and risking thermal runaway during repeated surges. Thermal vias under pads further improve heat dissipation in multilayer boards.
SM15T68A-M3/9AT 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-M3/9AT FAQ
1.How can I place an order for SM15T68A-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T68A-M3/9AT 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-M3/9AT reliable?
The price and inventory of SM15T68A-M3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T68A-M3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T68A-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T68A-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T68A-M3/9AT?
SM15T68A-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T68A-M3/9AT 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-M3/9AT?
For technical support, including SM15T68A-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T68A-M3/9AT requirements.
6.How does Aetrix verify that SM15T68A-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T68A-M3/9AT 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-M3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T68A-M3/9AT?
All SM15T68A-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T68A-M3/9AT, 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-M3/9AT part is unused and in its original packaging.
Return procedure for SM15T68A-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T68A-M3/9AT Tags
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