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Vishay General Semiconductor - Diodes Division 1.5SMC68AHM3/H
- Part No.:
- 1.5SMC68AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC68AHM3/H.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,251
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Product details
Overview
1.5SMC68AHM3/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power rails and signal lines. It features a 68 V breakdown voltage (VBR = 64.6–71.4 V at 1 mA), 58.1 V stand-off voltage (VWM), 92.0 V maximum clamping voltage (VC) at 16.3 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and DC power input stages.
For engineers reviewing the 1.5SMC68AHM3/H datasheet, 1.5SMC68AHM3/H pinout, 1.5SMC68AHM3/H application, or 1.5SMC68AHM3/H equivalent, key selection criteria include its AEC-Q101 qualification, halogen-free RoHS-compliant HM3 suffix, SMC (DO-214AB) surface-mount package, low incremental surge resistance, and verified clamping performance under repetitive transients induced by inductive switching or ESD events.
Technical Context
This device operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds VBR, with fast response time (<1 ps) and low dynamic impedance to limit transient energy delivered to downstream circuitry. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repeated surge stress.
The 1.5SMC68AHM3/H is rated for 150 °C maximum junction temperature and derates linearly above 25 °C ambient per Fig. 2; thermal resistance is 75 °C/W (junction-to-ambient) on standard 8.0 mm × 8.0 mm copper pads. It meets JESD201 Class 2 whisker resistance and MSL Level 1 reflow compatibility (260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 64.6 V / 71.4 V at 1 mA - defines precise avalanche initiation window for predictable clamping onset |
| VWM | 58.1 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | 92.0 V at 16.3 A - clamped voltage seen by protected IC during full 1500 W transient event |
| PPPM | 1500 W (10/1000 µs) - peak surge power handling capacity without failure |
| IPPM | 16.3 A - peak pulse current supported under standardized surge waveform |
| TJ max | 150 °C - enables operation in under-hood automotive and high-temperature industrial environments |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path) in unidirectional configuration |
| Cathode | Avalanche conduction terminal | Connected to protected line (e.g., 12 V rail or CAN_H); band-marked end conducts during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance per stress test plan |
| Halogen-free & RoHS-compliant (HM3) | Meets environmental compliance requirements for modern automotive and industrial PCB assembly |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) without degradation |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes voltage overshoot across protected components during fast transients |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT reflow profiles without preconditioning |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
Use Scenario: Protects microcontroller GPIO and LIN bus transceivers from load dump and alternator ripple in 12 V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between LIN line and ground, clamping transients within 1 ns to prevent latch-up or gate oxide damage. Use Value: Withstands 1500 W pulses while maintaining VC ≤ 92.0 V, ensuring safe operation of 5 V tolerant transceivers downstream. |
Use Scenario: Shields 24 V digital input optocoupler circuits from field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Primary overvoltage clamp on the 24 V supply rail feeding input conditioning circuitry. Use Value: 58.1 V VWM allows full margin above nominal 24 V ±10 %, while 92.0 V VC stays below optocoupler isolation barrier rating. |
| Telecom Power Supply Front-End | Consumer Appliance Motor Driver Board |
Use Scenario: Guards AC-DC converter primary-side control ICs against lightning-induced surges on AC mains input. IC Role / Device Role / Timing Role: Secondary-level TVS on DC bus after bridge rectifier, complementing MOV-based primary protection. Use Value: Fast response and low VC reduce stress on PWM controller ICs during combined surge/oscillation events. |
Use Scenario: Suppresses inductive kickback from brushed DC motor commutation on MCU-driven H-bridge gate drivers. IC Role / Device Role / Timing Role: Unidirectional clamp across motor terminals or driver supply rail to absorb flyback energy. Use Value: 16.3 A IPPM and 1500 W rating handle typical 10–100 ms motor stall transients without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ68A-HF | Same VBR range (64.6–71.4 V), but SMB package (smaller footprint, lower PPPM = 600 W) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 | Select when board space is constrained and surge threat level is ≤ Level 2 |
| 1.5KE68A | Through-hole DO-201 package, identical electrical specs, no AEC-Q101 or halogen-free certification | Not suitable for automated SMT lines or automotive production; higher thermal resistance | Choose only for legacy through-hole designs or non-automotive prototyping |
Compared with SMBJ68A-HF and 1.5KE68A, the 1.5SMC68AHM3/H uniquely combines AEC-Q101 qualification, halogen-free compliance, 1500 W surge capability, and SMC surface-mount packaging - making it the preferred choice for volume automotive and industrial SMT production where reliability, regulatory alignment, and high-energy transient immunity are mandatory.
Availability
1.5SMC68AHM3/H is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, and telecom power supply designs requiring stable component supply, long lifecycle support, and traceable sourcing.
Supply support for 1.5SMC68AHM3/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 is a global leader in discrete semiconductors, specializing in diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The 1.5SMC Series is engineered for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 qualification, surge robustness, and SMT manufacturability are critical design requirements.
FAQ
What is the clamping voltage of the 1.5SMC68AHM3/H under maximum surge conditions?
The 1.5SMC68AHM3/H has a maximum clamping voltage (VC) of 92.0 V at 16.3 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per standard test conditions (TA = 25 °C, mounted on 8.0 mm × 8.0 mm copper pads) and represents the upper voltage limit imposed on protected circuitry during worst-case transient events. The 1.5SMC68AHM3/H maintains this clamping performance across its qualified operating temperature range.
Is the 1.5SMC68AHM3/H suitable for automotive applications?
Yes, the 1.5SMC68AHM3/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction - explicitly intended for automotive use. It meets stress test requirements including high-temperature reverse bias, temperature cycling, and surge endurance. The 1.5SMC68AHM3/H is commonly deployed in body control modules, infotainment power supplies, and sensor interface circuits where automotive-grade reliability is mandated.
What does the "HM3" suffix mean in 1.5SMC68AHM3/H?
The "HM3" suffix in 1.5SMC68AHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. "H" indicates the packaging format (7-inch tape-and-reel), and "M3" specifies the halogen-free material set meeting JEDEC standards. This distinguishes it from commercial-grade "E3" or non-automotive "M3" variants. The 1.5SMC68AHM3/H is fully compliant with automotive manufacturing and environmental requirements.
How does the 1.5SMC68AHM3/H compare to bidirectional TVS diodes?
The 1.5SMC68AHM3/H is unidirectional and functions only in reverse-bias avalanche mode, making it ideal for DC rail protection where polarity is fixed (e.g., 12 V battery lines). Unlike bidirectional types (e.g., 1.5SMC68CA), it cannot suppress symmetrical AC transients. Its forward voltage drop (~3.5 V at 100 A) is irrelevant in normal operation but must be considered if used in series with polarized components. For the 1.5SMC68AHM3/H, polarity marking (cathode band) is essential during placement.
What is the thermal resistance of the 1.5SMC68AHM3/H, and how does it affect layout?
The 1.5SMC68AHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on minimum recommended 8.0 mm × 8.0 mm copper pads per terminal. This value assumes standard FR-4 PCB with no internal planes. To maintain TJ ≤ 150 °C under sustained 6.5 W power dissipation, designers must ensure adequate copper area and avoid thermal bottlenecks. Layout directly impacts surge survivability - undersized pads increase localized heating and risk parametric shift or failure during repetitive transients. The 1.5SMC68AHM3/H datasheet specifies pad dimensions in inches and millimeters for optimal thermal and mechanical performance.
1.5SMC68AHM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC68AHM3/H FAQ
1.How can I place an order for 1.5SMC68AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC68AHM3/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 1.5SMC68AHM3/H reliable?
The price and inventory of 1.5SMC68AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC68AHM3/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC68AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC68AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC68AHM3/H?
1.5SMC68AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC68AHM3/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 1.5SMC68AHM3/H?
For technical support, including 1.5SMC68AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC68AHM3/H requirements.
6.How does Aetrix verify that 1.5SMC68AHM3/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC68AHM3/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 1.5SMC68AHM3/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC68AHM3/H?
All 1.5SMC68AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC68AHM3/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 1.5SMC68AHM3/H part is unused and in its original packaging.
Return procedure for 1.5SMC68AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC68AHM3/H Tags
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