My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5SMC6.8CA-E3/9AT
- Part No.:
- 1.5SMC6.8CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC6.8CA-E3/9AT.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:5,818
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5SMC6.8CA-E3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for robust ESD and surge protection on signal and power lines. It features a 6.8 V breakdown voltage (VBR), 1500 W peak pulse power (10/1000 µs), 10.5 V clamping voltage at 143 A peak pulse current, and SMC (DO-214AB) surface-mount package - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC6.8CA-E3/9AT datasheet, 1.5SMC6.8CA-E3/9AT pinout, 1.5SMC6.8CA-E3/9AT application, or 1.5SMC6.8CA-E3/9AT equivalent, key selection criteria include bidirectional clamping symmetry, low clamping ratio (VC/VBR ≈ 1.54), MSL Level 1 moisture sensitivity, and AEC-Q101 qualification eligibility via HE3/HM3 variants.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR (6.45–7.14 V), VWM (5.80 V), and IPPM (143 A) specifications in either direction. Its glass-passivated junction ensures stable avalanche performance and fast response (<1 ps), while low incremental surge resistance minimizes voltage overshoot during transient events.
The device is rated for 1500 W peak pulse power under standardized 10/1000 µs waveform conditions, derated linearly above 25 °C ambient per Fig. 2, and supports continuous power dissipation of 6.5 W on infinite heatsink at 50 °C. Junction temperature range spans –65 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 6.45 V / 7.14 V - Ensures reliable, repeatable avalanche conduction onset within tight tolerance band at 10 mA test current. |
| VWM | 5.80 V - Maximum continuous reverse operating voltage before leakage exceeds 1000 µA; defines safe working margin below breakdown. |
| VC @ IPPM | 10.5 V at 143 A - Clamped voltage during 1500 W transient event; determines maximum stress imposed on protected downstream circuitry. |
| PPPM | 1500 W - Peak pulse power handling capability with 10/1000 µs waveform; validates suitability for lightning and inductive-switching surge standards. |
| TJ Range | –65 °C to +150 °C - Enables deployment in under-hood automotive, industrial control, and outdoor telecom environments. |
| Package | SMC (DO-214AB) - Standardized 2-pin surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal requirement for rated power dissipation. |
| MSL Level | Level 1 (J-STD-020) - Allows unlimited floor life and reflow up to 260 °C peak without baking preconditioning. |
Pinout & Package
SMC (DO-214AB) package: 2-terminal, non-polarized surface-mount outline with symmetrical cathode/anode terminals. No polarity marking required for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as anode or cathode depending on instantaneous polarity; no fixed polarity designation. |
| Terminal 2 | Anode / Cathode (bidirectional) | Electrically identical to Terminal 1; forms symmetrical clamping path across protected line pair (e.g., RS-485 A/B). |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions - eliminates need for orientation-aware layout in differential or AC-coupled lines. |
| 1500 W peak pulse rating | Validated per 10/1000 µs waveform - meets IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly mounted on 8 mm × 8 mm copper pads. |
| Glass-passivated junction | Stable, low-drift avalanche characteristics over lifetime and temperature - critical for long-term reliability in automotive and industrial deployments. |
| MSL Level 1 compliance | Reflow-compatible at 260 °C peak without moisture sensitivity concerns - enables direct placement into high-volume SMT assembly lines. |
| AEC-Q101 qualification path | HE3/HM3 variants available - supports functional safety requirements for automotive ECUs, ADAS sensors, and body electronics. |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus |
|---|---|
Use Scenario: Protecting CAN/LIN transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across signal/power pins to shunt transients before they reach sensitive input stages. Use Value: Maintains signal integrity by limiting clamped voltage to 10.5 V during 143 A surges - well below typical 12 V rail overvoltage thresholds. |
Use Scenario: Safeguarding differential data lines in factory automation PLCs against ground bounce, EFT, and cable-induced surges. IC Role / Device Role / Timing Role: Common-mode transient suppressor bridging A/B lines to suppress asymmetrical noise while preserving differential signaling. Use Value: Symmetrical clamping ensures equal voltage excursion on both lines, preventing receiver common-mode violation and false triggering. |
| Consumer USB Port Protection | Telecom DSL Line Interface |
Use Scenario: Guarding USB 2.0 D+/D− lines against human-body-model (HBM) ESD and hot-plug transients in set-top boxes and peripherals. IC Role / Device Role / Timing Role: Low-capacitance TVS (typ. <50 pF) placed directly at connector to intercept ESD before reaching PHY IC. Use Value: Sub-100 ns response time and 10.5 V clamping prevent latch-up or damage to 3.3 V USB transceivers during ±8 kV contact discharge. |
Use Scenario: Front-end surge suppression on ADSL/VDSL line cards exposed to lightning-induced surges on outside plant wiring. IC Role / Device Role / Timing Role: Primary coarse-clamp device upstream of gas discharge tube (GDT) and secondary TVS for staged protection. Use Value: 1500 W rating handles multi-kA induced surges; DO-214AB package allows compact, high-density front-end layout with thermal pad anchoring. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.8CA | Lower PPPM (600 W), SMB package (smaller thermal mass), higher RθJA (100 °C/W) | Suitable for lower-energy transients (IEC 61000-4-2 ESD only); not recommended for IEC 61000-4-5 Level 3+ surge. | Select when board space is constrained and surge energy is limited to <600 W; verify thermal design with reduced copper area. |
| 1.5KE6.8CA | Through-hole DO-201 package, same VBR/VC, but slower response due to lead inductance and higher clamping overshoot. | Legacy designs requiring THT assembly; unsuitable for high-speed data lines where sub-ns response is critical. | Choose only for cost-sensitive, non-high-speed applications where automated SMT is unavailable or PCB rework is acceptable. |
Compared with SMBJ6.8CA and 1.5KE6.8CA, the 1.5SMC6.8CA-E3/9AT delivers superior surge robustness (1500 W vs. 600 W or 1500 W with inferior thermal response), optimized SMT manufacturability, and tighter VBR tolerance - making it the preferred choice for new automotive and industrial designs requiring AEC-Q101 readiness and high-reliability surge immunity.
Availability
1.5SMC6.8CA-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor protection, industrial communication interfaces, consumer port hardening, and telecom line conditioning requiring stable component supply, RoHS-compliant packaging, and traceable lot-level documentation.
Supply support for 1.5SMC6.8CA-E3/9AT 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, optoelectronics, and passive components for automotive, industrial, and computing markets.
The 1.5SMC Series was engineered specifically for surface-mount transient suppression in space-constrained, high-surge environments - emphasizing bidirectional symmetry, AEC-Q101 scalability, and compatibility with automated SMT assembly processes.
FAQ
What is the breakdown voltage tolerance of the 1.5SMC6.8CA-E3/9AT?
The 1.5SMC6.8CA-E3/9AT has a specified breakdown voltage (VBR) range of 6.45 V to 7.14 V at 10 mA test current, representing a ±5% tolerance around the nominal 6.8 V rating. This tight distribution ensures consistent clamping behavior across production lots and supports predictable system-level surge margin calculations in designs using the 1.5SMC6.8CA-E3/9AT.
Is the 1.5SMC6.8CA-E3/9AT RoHS-compliant and halogen-free?
Yes, the 1.5SMC6.8CA-E3/9AT carries the "E3" suffix, indicating full RoHS compliance per EU Directive 2011/65/EU and exemption 7a. It is not halogen-free; for halogen-free compliance, the "M3" variant (e.g., 1.5SMC6.8CA-M3/9AT) must be selected. Both E3 and M3 meet JESD201 Class 2 whisker resistance requirements.
Does the 1.5SMC6.8CA-E3/9AT require orientation during PCB placement?
No - the 1.5SMC6.8CA-E3/9AT is a bidirectional TVS diode with symmetrical electrical characteristics in both directions, and its SMC (DO-214AB) package has no polarity marking. Either terminal may connect to either side of the protected line pair, simplifying layout and eliminating orientation errors during automated placement of the 1.5SMC6.8CA-E3/9AT.
What is the maximum clamping voltage of the 1.5SMC6.8CA-E3/9AT under surge conditions?
The 1.5SMC6.8CA-E3/9AT clamps to a maximum of 10.5 V when subjected to its rated peak pulse current of 143 A (10/1000 µs waveform). This clamping voltage is measured across the device terminals and defines the upper voltage limit imposed on protected circuitry during worst-case surge events involving the 1.5SMC6.8CA-E3/9AT.
Can the 1.5SMC6.8CA-E3/9AT be used in automotive applications?
While the base 1.5SMC6.8CA-E3/9AT is commercial-grade, Vishay offers AEC-Q101-qualified versions under HE3 (RoHS + AEC-Q101) and HM3 (halogen-free + AEC-Q101) suffixes. For automotive use, specify 1.5SMC6.8CAHE3_A/I or equivalent - the 1.5SMC6.8CA-E3/9AT itself is not AEC-Q101 qualified but shares identical die and package construction.
1.5SMC6.8CA-E3/9AT 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:
- Active
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC6.8CA-E3/9AT FAQ
1.How can I place an order for 1.5SMC6.8CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC6.8CA-E3/9AT 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 1.5SMC6.8CA-E3/9AT reliable?
The price and inventory of 1.5SMC6.8CA-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC6.8CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC6.8CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC6.8CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC6.8CA-E3/9AT?
1.5SMC6.8CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC6.8CA-E3/9AT 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 1.5SMC6.8CA-E3/9AT?
For technical support, including 1.5SMC6.8CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC6.8CA-E3/9AT requirements.
6.How does Aetrix verify that 1.5SMC6.8CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC6.8CA-E3/9AT 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 1.5SMC6.8CA-E3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC6.8CA-E3/9AT?
All 1.5SMC6.8CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC6.8CA-E3/9AT, 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 1.5SMC6.8CA-E3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC6.8CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC6.8CA-E3/9AT 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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
