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Vishay General Semiconductor - Diodes Division 1.5SMC6.8CAHM3/H
- Part No.:
- 1.5SMC6.8CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC6.8CAHM3/H.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,042
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Product details
Overview
1.5SMC6.8CAHM3/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients on signal or power lines. It features a 6.8 V breakdown voltage (VBR), 5.8 V stand-off voltage (VWM), 1500 W peak pulse power (10/1000 µs), <10.5 V clamping voltage at 143 A peak pulse current, and AEC-Q101 qualification for automotive use.
For engineers reviewing the 1.5SMC6.8CAHM3/H datasheet, 1.5SMC6.8CAHM3/H pinout, 1.5SMC6.8CAHM3/H application, or 1.5SMC6.8CAHM3/H equivalent, this device serves as a robust, halogen-free, RoHS-compliant transient protector for bidirectional signal lines in automotive ECUs, industrial sensor interfaces, and telecom front-end circuits where low clamping voltage and fast response (<1 ns) are critical.
Technical Context
The 1.5SMC6.8CAHM3/H operates as a bidirectional avalanche diode with symmetrical clamping behavior in both polarities, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1000 µA at VWM).
Designed for high-energy surge suppression, it delivers 143 A peak pulse current under 10/1000 µs waveform while maintaining clamping voltage ≤10.5 V - critical for safeguarding 5 V and 3.3 V logic interfaces. Thermal resistance is rated at 75 °C/W (junction-to-ambient) on standard 8 mm × 8 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 6.45 V / 7.14 V at 10 mA test current - defines precise avalanche initiation threshold for reliable overvoltage triggering |
| VWM | 5.8 V - maximum continuous reverse operating voltage before leakage exceeds 1000 µA; compatible with 5 V systems |
| VC @ IPPM | ≤10.5 V at 143 A - low clamping voltage limits stress on downstream ICs during ESD or lightning-induced surges |
| PPPM | 1500 W (10/1000 µs) - enables handling of high-energy transients common in automotive load-dump or inductive switching events |
| TJ max. | +150 °C - supports operation in under-hood automotive environments and industrial enclosures without derating |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height for automated assembly |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JESD22 standards |
Pinout & Package
SMC (DO-214AB) package: surface-mount, bidirectional device with no polarity marking; terminals are symmetric and interchangeable - cathode/anode designation does not apply.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as input/output path; symmetrical structure allows placement without orientation check |
| Terminal 2 | Anode/Cathode (bidirectional) | Paired terminal completes bidirectional conduction path; no functional distinction from Terminal 1 |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485, CAN), and ungrounded sensor outputs |
| 1500 W peak pulse rating | Withstands ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4 surges without degradation |
| Halogen-free & RoHS-compliant (HM3) | Meets automotive OEM material compliance requirements and supports lead-free reflow (MSL Level 1, 260 °C peak) |
| Low clamping ratio (VC/VBR ≈ 1.5) | Minimizes let-through energy to protected ICs - critical for safeguarding 3.3 V/5 V microcontrollers and transceivers |
| Fast response time (<1 ns) | Clamps transients before system-level protection (e.g., fuses, TVS arrays) can react, preserving signal integrity |
Applications
| Automotive Body Control Module (BCM) | Industrial RS-485 Sensor Network |
|---|---|
Use Scenario: Protects LIN bus and switch inputs in BCM against load dump and battery reversal transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed at connector interface to clamp ±100 V spikes before reaching MCU GPIOs. Use Value: Prevents latch-up or gate oxide damage in 5 V automotive MCUs by limiting voltage to ≤10.5 V during 1500 W surges. |
Use Scenario: Shields RS-485 transceivers in factory-floor sensor nodes from ground loop surges and ESD. IC Role / Device Role / Timing Role: Placed across differential pair (A/B) and common-mode line to suppress common- and differential-mode transients. Use Value: Maintains data integrity under IEC 61000-4-4 Level 4 (4 kV) bursts due to sub-1 ns response and symmetrical clamping. |
| Telecom DSL Line Interface | Consumer Appliance Motor Drive Feedback |
Use Scenario: Guards ADSL/VDSL line drivers against lightning-induced surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: Bidirectional TVS connected between tip/ring and ground to absorb longitudinal mode transients up to 10/1000 µs. Use Value: Enables compliance with ITU-T K.20/21 immunity requirements while preserving low-capacitance signal path (CJ < 200 pF). |
Use Scenario: Protects hall-effect sensor outputs in washing machine motor control boards from commutation noise. IC Role / Device Role / Timing Role: Mounted directly at sensor connector to shunt inductive kickback from BLDC motor windings. Use Value: Eliminates false triggering in 3.3 V sensor signal conditioning ICs by clamping transients to ≤10.5 V within nanoseconds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.8CA | Same VBR/VWM/VC, but lower PPPM = 400 W; SMA package (smaller footprint, higher RθJA = 110 °C/W) | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); unsuitable for ISO 7637-2 automotive load dump | Select when board space is constrained and surge energy is below 400 W - verify thermal margin at 100% duty cycle. |
| 1.5KE6.8CA | Same electrical specs, but axial-leaded DO-201 package; higher VC = 11.5 V; not surface-mountable | Requires through-hole assembly; incompatible with automated SMT lines; larger board area and mechanical stress sensitivity | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required. |
Compared with SMAJ6.8CA and 1.5KE6.8CA, the 1.5SMC6.8CAHM3/H uniquely combines AEC-Q101 qualification, 1500 W surge capability, SMC's robust thermal performance (RθJA = 75 °C/W), and halogen-free construction - making it the only option qualified for production automotive signal-line protection.
Availability
1.5SMC6.8CAHM3/H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom line protection requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for 1.5SMC6.8CAHM3/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 high-reliability diodes, MOSFETs, and optoelectronics for automotive, industrial, and computing markets.
The 1.5SMC Series was engineered specifically for high-power transient suppression in harsh environments, targeting automotive subsystems, industrial automation, and infrastructure equipment where robustness and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC6.8CAHM3/H at its rated peak pulse current?
The 1.5SMC6.8CAHM3/H has a maximum clamping voltage (VC) of 10.5 V at its rated peak pulse current (IPPM) of 143 A under the standard 10/1000 µs waveform. This value is guaranteed per Vishay's datasheet (Document Number 88303, page 2) and reflects worst-case performance at TA = 25 °C with proper PCB pad layout (8.0 mm × 8.0 mm copper). The 1.5SMC6.8CAHM3/H maintains this clamping performance across its full operating temperature range.
Is the 1.5SMC6.8CAHM3/H suitable for automotive applications?
Yes, the 1.5SMC6.8CAHM3/H is AEC-Q101 qualified - explicitly confirmed in the Vishay datasheet (page 1, "FEATURES" section and Ordering Information table). Its HM3 suffix denotes halogen-free, RoHS-compliant, and AEC-Q101-qualified construction. The 1.5SMC6.8CAHM3/H is designed for under-hood and body-control module applications where temperature cycling, humidity resistance, and surge immunity are required per automotive OEM specifications.
What does the "CA" suffix indicate in 1.5SMC6.8CAHM3/H?
The "CA" suffix in 1.5SMC6.8CAHM3/H designates a bidirectional configuration - meaning the device provides symmetrical transient suppression in both polarities, with identical VBR, VWM, and VC characteristics for positive and negative surges. This is distinct from "A"-suffix unidirectional parts and is essential for protecting AC-coupled or differential signal lines such as CAN, RS-485, or telecom interfaces.
What is the maximum operating junction temperature for the 1.5SMC6.8CAHM3/H?
The 1.5SMC6.8CAHM3/H has a maximum operating junction temperature (TJ) of +150 °C, as specified in the "MAXIMUM RATINGS" table (page 2 of datasheet 88303). This rating enables reliable operation in high-temperature environments such as engine compartments or enclosed industrial drives. Derating curves (Fig. 2) show that peak pulse power decreases linearly above 25 °C ambient, with 50% power capability retained at TA = 100 °C using standard PCB layout.
How does the 1.5SMC6.8CAHM3/H differ from the 1.5SMC6.8A variant?
The 1.5SMC6.8CAHM3/H is bidirectional (CA) and AEC-Q101 qualified with halogen-free construction (HM3), whereas the 1.5SMC6.8A is unidirectional (A) and commercial-grade (E3 or M3). Key differences include polarity marking (band on 1.5SMC6.8A cathode; no marking on 1.5SMC6.8CAHM3/H), clamping symmetry, and qualification status. The 1.5SMC6.8CAHM3/H also has tighter thermal resistance (75 °C/W vs. ~85 °C/W for E3 variants) due to optimized leadframe plating and molding compound.
1.5SMC6.8CAHM3/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:
- -
- Bidirectional Channels:
- 1
- 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)
1.5SMC6.8CAHM3/H FAQ
1.How can I place an order for 1.5SMC6.8CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC6.8CAHM3/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 1.5SMC6.8CAHM3/H reliable?
The price and inventory of 1.5SMC6.8CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC6.8CAHM3/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC6.8CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC6.8CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC6.8CAHM3/H?
1.5SMC6.8CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC6.8CAHM3/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 1.5SMC6.8CAHM3/H?
For technical support, including 1.5SMC6.8CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC6.8CAHM3/H requirements.
6.How does Aetrix verify that 1.5SMC6.8CAHM3/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC6.8CAHM3/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 1.5SMC6.8CAHM3/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC6.8CAHM3/H?
All 1.5SMC6.8CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC6.8CAHM3/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 1.5SMC6.8CAHM3/H part is unused and in its original packaging.
Return procedure for 1.5SMC6.8CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC6.8CAHM3/H Tags
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