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Vishay General Semiconductor - Diodes Division SM15T68AHM3/H
- Part No.:
- SM15T68AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T68AHM3/H.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,592
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Product details
Overview
SM15T68AHM3/H from Vishay General Semiconductor is a unidirectional 1500 W Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, with 68 V breakdown voltage (VBR = 64.6–71.4 V at IT = 1.0 mA), 58.1 V stand-off voltage (VWM), and 92.0 V clamping voltage (VC) at IPPM = 16.3 A (10/1000 μs). It protects MOSFETs and signal lines in automotive power electronics against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T68AHM3/H datasheet, SM15T68AHM3/H pinout, SM15T68AHM3/H application, or SM15T68AHM3/H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), clamping performance, and halogen-free RoHS-compliant sourcing details for industrial and automotive design validation.
Technical Context
The SM15T68AHM3/H employs a glass-passivated silicon junction optimized for high-energy transient suppression under 10/1000 μs waveform stress. Its low-inductance SMC package and cathode-band polarity marking support robust PCB-level ESD and surge protection in high-impedance source environments.
Designed for unidirectional operation only, it features a maximum reverse leakage of 1.0 μA at VWM, operates across –65 °C to +150 °C junction temperature range, and fails short-circuit under overstress-enabling predictable system-level fault containment in automotive ECUs and motor drive circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 64.6 V / 71.4 V at IT = 1.0 mA - defines reliable turn-on threshold for overvoltage clamping |
| VWM | 58.1 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 92.0 V at 16.3 A (10/1000 μs) - peak clamped voltage limiting stress on downstream ICs |
| PPPM | 1500 W - peak pulse power handling capability for lightning and switching surge immunity |
| RθJA | 75 °C/W - thermal resistance enabling 6.5 W steady-state dissipation on standard PCB copper pads |
| TJ max. | +150 °C - supports operation in under-hood automotive environments without derating |
| AEC-Q101 | Qualified - certified for automotive-grade reliability per stress test requirements |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Cathode identified by band marking; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Clamps positive transients to ground when used in reverse-biased configuration |
| Anode (unmarked end) | Reference node / return path | Connected to protected line; completes conduction path during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables single-device protection against IEC 61000-4-5 Level 4 (4 kV) surges in 2 Ω source impedance systems |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes voltage overshoot across protected MOSFET gate drivers during fast transients |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive powertrain and body control modules requiring zero-defect reliability |
| MSL Level 1 (260 °C reflow) | Supports lead-free assembly without popcorn cracking or delamination risk |
| Halogen-free & RoHS-compliant | Meets automotive OEM material compliance requirements (e.g., GMW3172, Ford WSS-M99P9999-A1) |
Applications
| Automotive Power Distribution | Industrial Motor Drive Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed DC-DC converter inputs in engine control units against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp transients above 58.1 V. Use Value: Limits peak voltage to 92.0 V during 16.3 A surges, preventing damage to buck controller ICs rated for 100 V absolute maximum. |
Use Scenario: Safeguarding gate driver outputs connected to IGBTs in variable-frequency drives exposed to inductive kickback. IC Role / Device Role / Timing Role: TVS mounted directly at gate driver output pins to suppress >1 kV spikes induced by rapid IGBT turn-off. Use Value: Clamps within 10 ns (typical), maintaining gate voltage integrity below 20 V to avoid false triggering or oxide breakdown. |
| Telecom Line Interface | Consumer Appliance Control Board |
Use Scenario: Shielding RS-485 transceiver power rails in outdoor base stations subjected to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary surge protector on VCC line upstream of LDO regulator feeding transceiver IC. Use Value: Absorbs 1500 W pulses without degradation, preserving ±5 V supply stability for differential signaling integrity. |
Use Scenario: Securing microcontroller I/O lines connected to relay coils and solenoid valves in smart washing machines. IC Role / Device Role / Timing Role: Localized TVS on each coil driver output to suppress 600 V/100 A inductive spikes. Use Value: Prevents latch-up in 3.3 V MCU GPIOs by limiting transient voltage to ≤92.0 V with <100 ps response time. |
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 | Lower PPPM (400 W), same VBR range, SMA package (smaller footprint, higher RθJA) | Suitable for lower-energy threats (IEC 61000-4-2 ESD only); not rated for lightning surges | Select when board space is constrained and surge threat level is limited to ±15 kV contact ESD |
| 1.5KE68A | Higher VC (118 V), axial-leaded DO-201 package, non-AEC-Q101, 1500 W rating | Requires through-hole mounting; lacks automotive qualification and halogen-free compliance | Choose for cost-sensitive industrial prototypes where AEC-Q101 and RoHS are not mandated |
Compared with SMAJ68A-E3/57T and 1.5KE68A, SM15T68AHM3/H delivers superior automotive-grade reliability, lower clamping voltage, and surface-mount compatibility-making it the preferred choice for production-grade 12 V/24 V systems requiring IEC 61000-4-5 compliance and zero-defect field performance.
Availability
SM15T68AHM3/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive protection, and telecom line interface applications requiring stable component supply, halogen-free compliance, and AEC-Q101 qualification.
Supply support for SM15T68AHM3/H 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 for industrial, automotive, and computing markets.
The SM15T Series was developed specifically for high-reliability transient suppression in automotive and industrial power systems, emphasizing AEC-Q101 qualification, low-clamp performance, and robust surge handling in compact SMC packages.
FAQ
What is the clamping voltage of SM15T68AHM3/H at its rated peak pulse current?
The SM15T68AHM3/H has a maximum clamping voltage (VC) of 92.0 V at IPPM = 16.3 A under the standardized 10/1000 μs waveform. This value is measured with the device mounted on 0.31" × 0.31" copper pads per JEDEC standards and ensures downstream components remain within safe operating voltage limits during surge events.
Is SM15T68AHM3/H qualified for automotive applications?
Yes, SM15T68AHM3/H is AEC-Q101 qualified, as indicated by the "HM3" suffix (halogen-free, RoHS-compliant, and automotive-grade). It meets all stress tests defined in AEC-Q101 Rev D, including HTGB, HTRB, and TCT, making it suitable for use in engine control units, body electronics, and ADAS power supplies.
What does the "H" in SM15T68AHM3/H signify?
The "H" in SM15T68AHM3/H denotes the revision code per Vishay's ordering nomenclature, indicating the latest validated version of the part. It reflects compliance with current MSL Level 1 reflow profiles, updated material declarations, and final AEC-Q101 test reports-ensuring full interchangeability with prior HM3-labeled units.
How does SM15T68AHM3/H differ from bidirectional TVS diodes like SM15T68CA?
SM15T68AHM3/H is unidirectional and conducts only during reverse-bias overvoltage events, with polarity marked by a cathode band. In contrast, SM15T68CA is bidirectional and clamps transients of either polarity. The unidirectional version offers lower leakage (<1.0 μA at VWM) and tighter VBR tolerance, ideal for DC rail protection where polarity is fixed.
What is the thermal resistance of SM15T68AHM3/H, and how does it affect PCB layout?
SM15T68AHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" copper pads. To maintain safe junction temperatures under sustained 6.5 W dissipation, designers must provide adequate copper area and avoid thermal isolation-especially critical in automotive under-hood environments exceeding 105 °C ambient.
SM15T68AHM3/H 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:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SM15T68AHM3/H FAQ
1.How can I place an order for SM15T68AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T68AHM3/H 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 SM15T68AHM3/H reliable?
The price and inventory of SM15T68AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T68AHM3/H is usually 5 days.
3.What payment methods are accepted for SM15T68AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T68AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T68AHM3/H?
SM15T68AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T68AHM3/H 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 SM15T68AHM3/H?
For technical support, including SM15T68AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T68AHM3/H requirements.
6.How does Aetrix verify that SM15T68AHM3/H is sourced from the original manufacturer or authorized distributors?
All SM15T68AHM3/H 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 SM15T68AHM3/H meets industry standards.
7.What is the process for return or replacement of SM15T68AHM3/H?
All SM15T68AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SM15T68AHM3/H, 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 SM15T68AHM3/H part is unused and in its original packaging.
Return procedure for SM15T68AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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