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Vishay General Semiconductor - Diodes Division 1.5SMC6.8AHM3/H
- Part No.:
- 1.5SMC6.8AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC6.8AHM3/H.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,291
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Product details
Overview
1.5SMC6.8AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection in power rails and signal lines. It features a 6.45 V minimum breakdown voltage (VBR), 5.8 V stand-off voltage (VWM), 10.5 V maximum clamping voltage at 143 A peak pulse current, 1500 W peak pulse power rating (10/1000 µs), and SMC (DO-214AB) package - used in automotive sensor interface protection and industrial DC input stages.
For engineers reviewing the 1.5SMC6.8AHM3/H datasheet, 1.5SMC6.8AHM3/H pinout, 1.5SMC6.8AHM3/H application, or 1.5SMC6.8AHM3/H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), polarity marking convention, and direct replacement guidance for board-level ESD/surge hardening.
Technical Context
The 1.5SMC6.8AHM3/H operates as a unidirectional avalanche diode with glass-passivated junction, enabling fast response (<1 ns) to transient events such as ESD, lightning-induced surges, and inductive switching spikes. Its clamping action begins at VWM = 5.8 V and fully engages at VBR = 6.45–7.14 V (tested at 10 mA), limiting downstream voltage to ≤10.5 V under 143 A 10/1000 µs pulses.
Designed for surface-mount assembly on 8.0 mm × 8.0 mm copper pads, it supports repetitive surge duty cycles up to 0.01 %, handles 200 A non-repetitive forward surge (8.3 ms half-sine), and maintains operation across –65 °C to +150 °C junction temperature range. The HM3 suffix confirms halogen-free, RoHS-compliant, and AEC-Q101 qualified construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 5.8 V - Maximum continuous reverse voltage before leakage exceeds 1000 µA; defines safe operating margin below clamping threshold |
| VBR (Breakdown) | 6.45–7.14 V @ 10 mA - Avalanche conduction onset range; ensures reliable triggering during transients without premature conduction |
| VC (Clamping) | 10.5 V @ 143 A - Peak voltage seen by protected circuit during worst-case 10/1000 µs surge; critical for IC voltage tolerance compliance |
| PPPM | 1500 W - Peak pulse power handling per 10/1000 µs waveform; enables robust protection against IEC 61000-4-5 Level 4 surges |
| IPPM | 143 A - Maximum non-repetitive peak pulse current; determines minimum trace width and PCB copper area required for thermal dissipation |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on standard pad layout; informs derating above 25 °C ambient for sustained reliability |
| TJ max | +150 °C - Maximum allowable junction temperature; sets upper limit for power cycling and high-temperature automotive deployment |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic case with matte tin-plated leads; cathode indicated by band marking on one end; meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to lower-potential side of protected line (e.g., GND or return path); defines unidirectional conduction direction |
| Cathode | Avalanche conduction output / Clamping node | Connected to higher-potential side (e.g., VIN, signal line); carries full surge current during clamping event |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Supports IEC 61000-4-5 surge immunity up to 4 kV (line-earth) without external series impedance |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HAST, and mechanical shock per stress test plan |
| Halogen-free & RoHS-compliant (HM3) | Meets EU ELV Directive and automotive OEM material declarations; eliminates brominated flame retardants |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD), improving protection margin for 3.3 V/5 V logic |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT reflow profiles without moisture sensitivity concerns or baking requirements |
Applications
| Automotive Sensor Interface | Industrial DC Power Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and jump-start transients in 12 V vehicle systems. IC Role / Device Role: Unidirectional TVS placed between signal line and chassis ground to clamp negative-going spikes and positive surges exceeding VWM. Use Value: Limits voltage to ≤10.5 V during 143 A surges, preventing latch-up or gate oxide damage in 5 V tolerant transceivers and ADC front-ends. |
Use Scenario: Safeguarding 24 V DC input stages of PLC modules and motor drives against inductive kickback from solenoids and contactors. IC Role / Device Role: Primary overvoltage clamp on main supply rail, positioned upstream of bulk capacitors and DC/DC converters. Use Value: Absorbs 1500 W transient energy without failure, maintaining system uptime during factory equipment switching events. |
| Consumer USB Port Protection | Telecom Line Card Surge Guard |
Use Scenario: Secondary protection on VBUS line of USB 2.0/3.0 ports in set-top boxes and smart displays exposed to user-handling ESD. IC Role / Device Role: Fast-response TVS shunting ESD current (>15 kV contact) to ground while preserving 5.0 ±0.25 V regulation. Use Value: Clamps sub-100 ns ESD pulses to <10.5 V, ensuring USB PHY compliance with IEC 61000-4-2 Level 4 (±15 kV air). |
Use Scenario: Front-end surge suppression on POTS or xDSL line interfaces in network termination units subjected to lightning-induced longitudinal surges. IC Role / Device Role: Unidirectional clamp referenced to tip/ring differential pair, coordinated with gas discharge tube (GDT) primary protection. Use Value: Provides low-clamp secondary protection with <1 ns response, reducing let-through voltage to telecom ICs rated for ≤12 V absolute max. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.8A-HF | Lower PPPM (600 W), SMB package (smaller footprint), same VWM/VBR range, non-AEC-Q101 | Suitable for space-constrained consumer boards where 1500 W surge headroom is not required | Select when board area is limited and surge threat level is IEC 61000-4-5 Level 2 (2 kV) |
| 1.5KE6.8A | Through-hole DO-201 package, identical electrical specs but higher RθJA (~50 °C/W on larger pads), no AEC-Q101 option | Used in legacy industrial power supplies requiring manual assembly or wave soldering | Choose only for through-hole redesigns or prototyping where SMT placement is unavailable |
Compared with 1.5SMC6.8AHM3/H, SMBJ6.8A-HF trades 60 % peak power and AEC-Q101 qualification for 40 % smaller footprint, while 1.5KE6.8A retains full electrical performance but sacrifices automated assembly compatibility and automotive qualification - making 1.5SMC6.8AHM3/H optimal for production automotive and industrial SMT designs demanding highest surge resilience.
Availability
1.5SMC6.8AHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial DC power inputs, consumer USB port protection, and telecom line card surge guard applications requiring stable component supply, AEC-Q101 validation, and halogen-free compliance.
Supply support for 1.5SMC6.8AHM3/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, rectifiers, MOSFETs, and protection devices with emphasis on high-reliability, automotive-qualified, and industry-standard solutions.
The 1.5SMC Series was engineered specifically for surface-mount transient suppression in harsh environments - delivering high-power surge handling, AEC-Q101 qualification, and consistent clamping performance across automotive, industrial, and telecom infrastructure platforms.
FAQ
What is the clamping voltage of the 1.5SMC6.8AHM3/H under maximum rated surge current?
The 1.5SMC6.8AHM3/H exhibits a maximum clamping voltage (VC) of 10.5 V when subjected to its rated peak pulse current (IPPM) of 143 A using the standardized 10/1000 µs waveform. This value is measured at the device terminals under specified 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 1.5SMC6.8AHM3/H maintains this clamping performance consistently across its qualified temperature range.
Is the 1.5SMC6.8AHM3/H qualified for automotive applications?
Yes, the 1.5SMC6.8AHM3/H is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's 1.5SMC Series datasheet (Document Number: 88303). This qualification covers stress tests including temperature cycling, highly accelerated stress testing (HAST), and mechanical shock, validating its suitability for under-hood and cabin-mounted automotive electronics. The 1.5SMC6.8AHM3/H is explicitly designated for automotive use in the manufacturer's ordering information table.
What does the "HM3" suffix indicate in 1.5SMC6.8AHM3/H?
The "HM3" suffix in 1.5SMC6.8AHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Per Vishay's ordering nomenclature, "H" identifies the tape-and-reel packaging variant (7″ or 13″ reel), "M3" specifies halogen-free molding compound and lead finish, and the trailing "/H" indicates 7″ diameter reel packaging. This suffix ensures compliance with automotive material restrictions and environmental directives without compromising electrical or thermal performance.
How is polarity identified on the 1.5SMC6.8AHM3/H package?
The 1.5SMC6.8AHM3/H uses a visible cathode band marking on the SMC (DO-214AB) package body to identify polarity: the banded end is the cathode terminal, and the opposite end is the anode. This marking aligns with JEDEC standards for unidirectional TVS diodes and is essential for correct orientation during PCB layout and assembly. No marking is present on bidirectional variants, but the 1.5SMC6.8AHM3/H is unidirectional and always features this band.
What is the maximum operating junction temperature for the 1.5SMC6.8AHM3/H?
The 1.5SMC6.8AHM3/H has a maximum operating junction temperature (TJ) of +150 °C, as specified in the Absolute Maximum Ratings table of the Vishay datasheet. This rating applies to both continuous operation and transient surge events, provided thermal design (e.g., copper pad area, airflow) maintains junction temperature within limits. Derating curves in Figure 2 confirm usable power dissipation down to zero at +150 °C ambient when mounted per recommended layout.
1.5SMC6.8AHM3/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):
- 5.8V
- Voltage - Breakdown (Min):
- 6.45V
- Voltage - Clamping (Max) @ Ipp:
- 10.5V
- Current - Peak Pulse (10/1000µs):
- 143A
- 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)
1.5SMC6.8AHM3/H FAQ
1.How can I place an order for 1.5SMC6.8AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC6.8AHM3/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 1.5SMC6.8AHM3/H reliable?
The price and inventory of 1.5SMC6.8AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC6.8AHM3/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC6.8AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC6.8AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC6.8AHM3/H?
1.5SMC6.8AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC6.8AHM3/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 1.5SMC6.8AHM3/H?
For technical support, including 1.5SMC6.8AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC6.8AHM3/H requirements.
6.How does Aetrix verify that 1.5SMC6.8AHM3/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC6.8AHM3/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 1.5SMC6.8AHM3/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC6.8AHM3/H?
All 1.5SMC6.8AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC6.8AHM3/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 1.5SMC6.8AHM3/H part is unused and in its original packaging.
Return procedure for 1.5SMC6.8AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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