My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SM6T68A-M3/52
;;2.jpg)
- Part No.:
- SM6T68A-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T68A-M3/52.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,281
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM6T68A-M3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, with 68 V breakdown voltage (VBR = 64.6–71.4 V at 1 mA), 58.1 V stand-off voltage (VWM), and 92 V clamping voltage (VC) at 6.5 A peak pulse current. It delivers 600 W peak pulse power (10/1000 μs), operates from −65 °C to +150 °C, and is halogen-free, RoHS-compliant. It protects MOSFETs and signal lines in automotive sensor units against inductive switching transients.
For engineers reviewing the SM6T68A-M3/52 datasheet, SM6T68A-M3/52 pinout, SM6T68A-M3/52 application, or SM6T68A-M3/52 equivalent, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, thermal resistance (RθJA = 100 °C/W), unidirectional polarity marking, and AEC-Q101 qualification eligibility via HM3 suffix variants.
Technical Context
The SM6T68A-M3/52 uses a glass-passivated silicon junction optimized for fast response (<1 ns) to transient overvoltages and low clamping ratio (VC/VBR ≈ 1.33). Its SMB package provides low parasitic inductance and meets J-STD-020 MSL Level 1 with 260 °C reflow peak.
Designed for unidirectional operation, it features cathode-band polarity identification, 1.0 mA test current for VBR, and 1.0 μA max reverse leakage at VWM. Thermal derating begins above 25 °C ambient, with RθJL = 20 °C/W enabling effective lead-based heat dissipation under pulsed conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 64.6 V / 71.4 V at 1.0 mA - defines reliable conduction onset threshold for overvoltage protection |
| VWM | 58.1 V - maximum continuous reverse operating voltage before significant leakage |
| VC @ IPPM | 92.0 V at 6.5 A (10/1000 μs) - clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 600 W - peak transient power handling capability under standardized 10/1000 μs waveform |
| RθJA | 100 °C/W - junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads |
| TJ range | −65 °C to +150 °C - operational and storage temperature envelope for industrial and automotive use |
| Package | SMB (DO-214AA) - surface-mount outline with 2.20 mm max height, compatible with automated placement |
Pinout & Package
SMB (DO-214AA) package: molded plastic case with matte tin-plated leads, cathode indicated by band-marked end; terminals solderable per J-STD-002 and JESD 22-B102, MSL Level 1 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to system ground or low-side reference | Provides return path during transient clamp; must be routed with low-inductance trace to minimize VL = L·di/dt overshoot |
| Cathode | Current exit point in forward bias; marked with band; connects to protected line | Directly interfaces with vulnerable node (e.g., MOSFET gate or sensor output); determines polarity of protection |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust suppression of high-energy transients from inductive loads without degradation |
| Glass-passivated junction | Ensures stable VBR and low leakage over temperature and lifetime; improves reliability vs. epoxy-passivated alternatives |
| Low-inductance SMB package | Minimizes voltage overshoot during fast-rising transients (e.g., ESD, load dump), critical for protecting high-speed interfaces |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for automotive and industrial end equipment without sacrificing electrical performance |
| 100 A IFSM (10 ms half-sine) | Supports survival during repetitive surge events such as motor commutation spikes in power electronics |
Applications
| Automotive Sensor Protection | Industrial Motor Drive Gate Protection |
|---|---|
|
Use Scenario: Protecting analog output lines of ABS wheel speed sensors exposed to alternator load dump and relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient energy before it reaches the sensor's op-amp output stage. Use Value: Prevents latch-up or permanent damage to precision amplifier stages while maintaining signal integrity below 58.1 V nominal operation. |
Use Scenario: Shielding high-side N-channel MOSFET gates in 24 V DC motor H-bridge drivers from Miller-induced voltage spikes. IC Role / Device Role / Timing Role: Fast-clamping device placed between gate and source to limit VGS excursion during switching transitions. Use Value: Maintains gate oxide safety margin (VGS(max) = ±20 V) by clamping to ≤92 V with sub-1 ns response, avoiding false turn-on. |
| Telecom Line Interface Surge Suppression | Consumer Power Supply Input Protection |
|
Use Scenario: Safeguarding RS-485 transceiver inputs in outdoor base station backhaul links subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on differential bus lines, coordinated with GDT or MOV secondary protection. Use Value: Limits induced common-mode voltage to <92 V across transceiver input pins, preserving data integrity and preventing receiver saturation. |
Use Scenario: Protecting AC-DC adapter primary-side rectifier outputs from mains-borne transients and capacitor discharge spikes. IC Role / Device Role / Timing Role: Secondary-level clamping device downstream of fuse and MOV, absorbing residual energy missed by bulk suppressors. Use Value: Absorbs up to 600 W of residual surge energy without failure, ensuring downstream regulator ICs remain within safe operating area. |
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-E3/52 | Same VBR (64.6–71.4 V), but lower PPPM = 400 W; SMA package (DO-214AC), slightly larger footprint | Lower power handling limits suitability to less severe surge environments (e.g., consumer USB ports vs. automotive power nets) | Select when cost sensitivity outweighs need for 600 W margin and board space permits SMA footprint |
| SMCJ68A-M3/52 | Same VBR and PPPM = 1500 W; SMC package (DO-214AB), higher thermal mass and RθJA = 35 °C/W | Better suited for high-repetition-rate surges (e.g., industrial PLC I/O modules) due to superior thermal dissipation | Choose when sustained surge duty cycle exceeds 1 Hz or ambient exceeds 85 °C, requiring enhanced thermal robustness |
Compared with SMAJ68A-E3/52 and SMCJ68A-M3/52, the SM6T68A-M3/52 offers optimal balance of 600 W surge capacity, compact SMB footprint, and halogen-free compliance-making it ideal for space-constrained automotive and industrial PCBs where moderate surge repetition and strict environmental specs apply.
Availability
SM6T68A-M3/52 is available at Aetrix Electronics and suitable for automotive sensor units, industrial motor drive gate circuits, telecom line interfaces, and consumer power supply input protection requiring stable component supply and halogen-free compliance.
Supply support for SM6T68A-M3/52 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SM6T Series is designed for robust transient suppression in harsh environments-including automotive, industrial, and telecom-where consistent clamping performance, low leakage, and AEC-Q101 readiness are essential.
FAQ
What is the clamping voltage of SM6T68A-M3/52 and how does it relate to protected circuit safety?
The SM6T68A-M3/52 has a maximum clamping voltage (VC) of 92.0 V at 6.5 A peak pulse current (10/1000 μs). This value defines the highest voltage imposed on the protected node during a transient event. To ensure safety, the VC must remain below the absolute maximum rating of downstream components-for example, keeping VC < 100 V ensures compatibility with 100 V-rated MOSFETs or op-amps. The SM6T68A-M3/52 achieves this with a tight VC/VBR ratio of ~1.33, confirming efficient energy diversion.
Is SM6T68A-M3/52 suitable for automotive applications, and what qualifications does it meet?
The SM6T68A-M3/52 itself is halogen-free and RoHS-compliant (M3 suffix), but is not AEC-Q101 qualified. For automotive-grade use, Vishay offers the HM3 variant (e.g., SM6T68AHM3_B/I), which adds AEC-Q101 qualification while retaining identical electrical specs and SMB packaging. Engineers selecting SM6T68A-M3/52 for non-safety-critical automotive subsystems (e.g., infotainment power rails) must validate reliability separately; the SM6T68A-M3/52 remains appropriate for industrial and telecom applications per its published ratings.
How does the SMB package of SM6T68A-M3/52 compare to SMA and SMC in terms of thermal performance?
The SMB package of SM6T68A-M3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W on standard 0.2" × 0.2" copper pads-higher than SMC (35 °C/W) but lower than SMA (140 °C/W). This positions SM6T68A-M3/52 for moderate-duty cycling: it handles single 600 W pulses reliably, but repeated surges require careful thermal design. In contrast, SMCJ68A-M3/52 (SMC) supports higher repetition rates, while SMAJ68A-E3/52 (SMA) suits lower-power, space-tolerant layouts. The SMB footprint of SM6T68A-M3/52 balances size and thermal capability.
What is the meaning of the "M3" and "/52" suffixes in SM6T68A-M3/52?
In SM6T68A-M3/52, "M3" denotes halogen-free, RoHS-compliant construction with JESD 201 Class 2 whisker resistance; "/52" specifies packaging in 7" diameter plastic tape and reel containing 750 units. This format enables automated pick-and-place assembly. The base part SM6T68A defines the electrical characteristics (68 V VBR, unidirectional), while M3/52 confirms environmental compliance and logistics configuration. Alternate options include M3/5B (3200 units on 13" reel) or HE3/HM3 variants for AEC-Q101 qualification.
Can SM6T68A-M3/52 be used in bidirectional configurations?
No-SM6T68A-M3/52 is strictly unidirectional, identified by a cathode band. Bidirectional operation requires the "CA" suffix (e.g., SM6T68CA-M3/52), which uses symmetrical breakdown in both polarities and omits polarity marking. Using SM6T68A-M3/52 in reverse-biased AC signal paths would result in unintended conduction during negative half-cycles, potentially damaging the diode or distorting signals. Always match suffix to application polarity: "A" for unidirectional, "CA" for bidirectional.
SM6T68A-M3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, 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):
- 6.5A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMBJ)
SM6T68A-M3/52 FAQ
1.How can I place an order for SM6T68A-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T68A-M3/52 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 SM6T68A-M3/52 reliable?
The price and inventory of SM6T68A-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T68A-M3/52 is usually 5 days.
3.What payment methods are accepted for SM6T68A-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T68A-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T68A-M3/52?
SM6T68A-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T68A-M3/52 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 SM6T68A-M3/52?
For technical support, including SM6T68A-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T68A-M3/52 requirements.
6.How does Aetrix verify that SM6T68A-M3/52 is sourced from the original manufacturer or authorized distributors?
All SM6T68A-M3/52 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 SM6T68A-M3/52 meets industry standards.
7.What is the process for return or replacement of SM6T68A-M3/52?
All SM6T68A-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SM6T68A-M3/52, 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 SM6T68A-M3/52 part is unused and in its original packaging.
Return procedure for SM6T68A-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T68A-M3/52 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
