My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMCG6.5CA-M3/9AT
- Part No.:
- SMCG6.5CA-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG6.5CA-M3/9AT.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,590
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCG6.5CA-M3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) in the SMCG (DO-215AB) package, designed for robust overvoltage protection on signal and power lines. It features a 6.5 V stand-off voltage (VWM), 7.22–7.98 V breakdown voltage (VBR) at 10 mA, 1500 W peak pulse power (10/1000 µs), clamping voltage of 11.2 V at 133.9 A IPPM, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMCG6.5CA-M3/9AT datasheet, SMCG6.5CA-M3/9AT pinout, SMCG6.5CA-M3/9AT application, or SMCG6.5CA-M3/9AT equivalent, key selection criteria include bidirectional clamping behavior, low clamping ratio (VC/VBR ≈ 1.47), halogen-free RoHS compliance (M3 suffix), 133.9 A surge current capability, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging an avalanche diode structure to divert surge energy away from protected circuitry. Its bidirectional symmetry ensures identical electrical characteristics in both polarities, eliminating polarity concerns in AC-coupled or differential signal paths.
The SMCG6.5CA-M3/9AT is rated for TJ = –55 °C to +150 °C operation, exhibits 75 °C/W junction-to-ambient thermal resistance (RθJA), and maintains stable clamping performance under repetitive surges when mounted per recommended 0.31" × 0.31" copper pad layout - critical for sustained reliability in automotive engine control units and industrial sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - maximum continuous reverse operating voltage before conduction begins; defines safe operating margin for 5 V logic or CAN bus lines. |
| VBR min/max | 7.22 V / 7.98 V at 10 mA - tight breakdown tolerance ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM | 11.2 V at 133.9 A - clamping voltage limits downstream IC stress during 10/1000 µs transients (e.g., ISO 7637-2 Pulse 1/2a). |
| PPPM | 1500 W - peak surge power handling capacity supports high-energy ESD and load-dump events in automotive environments. |
| ID @ VWM | 500 µA - low leakage preserves signal integrity and battery life in always-on sensor nodes. |
| TJ max | +150 °C - enables deployment in under-hood automotive locations without derating penalties. |
| Package | SMCG (DO-215AB) - surface-mount gull-wing package with matte tin leads, MSL Level 1, compatible with standard reflow profiles. |
Pinout & Package
SMCG6.5CA-M3/9AT uses the SMCG (DO-215AB) package: a bidirectional, unmarked, two-terminal surface-mount device with gull-wing leads. No polarity marking is present, as both terminals are functionally symmetric.
| 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; connects to line under protection. |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; forms symmetrical clamp path across protected differential pair or AC signal line. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including powertrain and ADAS modules, with guaranteed reliability under temperature cycling, humidity, and mechanical shock. |
| Halogen-free & RoHS compliant (M3) | Meets IEC 61249-2-21 and JEDEC J-STD-20D requirements; eliminates brominated flame retardants for safer end-of-life processing. |
| Low incremental surge resistance | Enables tighter VC/VBR ratio (1.47), reducing voltage overshoot during fast transients compared to higher-Rsurge TVS devices. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow without baking; simplifies manufacturing logistics for high-volume SMT lines. |
| Glass passivated junction | Provides stable leakage and breakdown characteristics over time and temperature, critical for long-lifetime industrial deployments. |
Applications
| Automotive CAN Bus Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting high-speed CAN FD transceivers from ISO 16750-2 load dump and ISO 7637-2 coupled transients in vehicle body control modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across CANH/CANL differential pair, absorbing surge energy before it reaches the transceiver's input stage. Use Value: Maintains <11.2 V clamping during 133.9 A surges, preventing transceiver latch-up or permanent damage while preserving signal integrity up to 5 Mbps. | Use Scenario: Safeguarding 4–20 mA current-loop sensors in factory automation against field-wiring induced surges and electrostatic discharge. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor across sensor output terminals, shunting surge current away from precision current-sense amplifiers and ADC inputs. Use Value: Withstands repeated 1500 W pulses without degradation, ensuring >10-year field reliability in harsh electromagnetic environments per IEC 61000-4-5 Level 4. |
| USB 2.0 Data Line Protection | Power-over-Ethernet (PoE) Interface Protection |
Use Scenario: ESD protection for USB 2.0 D+/D− lines in automotive infotainment head units exposed to human-body-model (HBM) discharges. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed directly at USB connector, limiting transient voltage before it couples into USB PHY IC. Use Value: Sub-100 pF junction capacitance (typical, per family data) avoids signal rise-time degradation, supporting full-speed 480 Mbps operation without jitter increase. | Use Scenario: Secondary-side surge suppression on PoE-powered devices (e.g., IP cameras) subjected to lightning-induced surges on Ethernet pairs. IC Role / Device Role / Timing Role: Clamp device installed across each twisted pair (e.g., between pins 4–5 and 7–8), limiting common-mode voltage to safe levels for IEEE 802.3af/at receivers. Use Value: 1500 W PPPM rating handles combination wave (1.2/50 µs voltage + 8/20 µs current) surges per IEC 61000-4-5, enabling Class 4 PoE+ compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.5CA | Same VWM (6.5 V) and bidirectional configuration, but SMA (DO-214AC) package; lower PPPM (400 W); RθJA = 110 °C/W. | Limited to lower-energy transients; unsuitable for automotive load-dump or industrial 4 kV surge testing. | Select SMAJ6.5CA only for cost-sensitive consumer electronics where 400 W surge capacity suffices and space allows larger SMA footprint. |
| 1.5KE6.8CA | Higher VWM (6.8 V), axial-leaded DO-201AD package; 1500 W PPPM; not AEC-Q101 qualified; RθJA ≈ 30 °C/W (with heatsink). | Requires through-hole assembly and external heatsinking; lacks automotive qualification and SMT process compatibility. | Choose 1.5KE6.8CA only for legacy through-hole designs or prototyping where leaded components are mandated and thermal management is actively controlled. |
Compared with SMAJ6.5CA and 1.5KE6.8CA, SMCG6.5CA-M3/9AT delivers automotive-grade reliability in a compact, lead-free, MSL Level 1 SMT package - uniquely balancing high surge capacity, low thermal resistance (75 °C/W), and production-ready manufacturability for next-generation automotive and industrial systems.
Availability
SMCG6.5CA-M3/9AT is available at Aetrix Electronics and suitable for automotive CAN bus protection, industrial 4–20 mA sensor interfaces, USB 2.0 data line safeguarding, and Power-over-Ethernet secondary-side surge suppression requiring stable component supply across extended product lifecycles.
Supply support for SMCG6.5CA-M3/9AT 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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on high-reliability, automotive-qualified, and industry-standard solutions.
The SMCG series was developed specifically for high-power, surface-mount transient suppression in space-constrained automotive and industrial applications - prioritizing AEC-Q101 compliance, low clamping voltage, and robust surge handling in the DO-215AB footprint.
FAQ
What does the "CA" suffix indicate in SMCG6.5CA-M3/9AT?
The "CA" suffix denotes a bidirectional configuration, meaning SMCG6.5CA-M3/9AT provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SMCG6.5A), it has no cathode marking and functions identically regardless of polarity - essential for protecting AC-coupled or differential signal lines such as CAN, RS-485, or USB D+/D−.
Is SMCG6.5CA-M3/9AT suitable for automotive applications?
Yes, SMCG6.5CA-M3/9AT is AEC-Q101 qualified and explicitly rated for automotive use. Its 1500 W peak pulse power, –55 °C to +150 °C operating range, MSL Level 1 packaging, and halogen-free (M3) construction meet stringent requirements for engine control units, body electronics, and ADAS modules. The device is validated for ISO 7637-2 and ISO 16750-2 compliance when applied per Vishay's recommended PCB layout.
How does the SMCG6.5CA-M3/9AT clamping voltage compare to its breakdown voltage?
SMCG6.5CA-M3/9AT has a VBR range of 7.22 V to 7.98 V at 10 mA and clamps at 11.2 V when subjected to its rated 133.9 A peak pulse current (IPPM). This yields a clamping ratio (VC/VBR) of approximately 1.47, indicating efficient voltage limiting with minimal overshoot - a key advantage over higher-ratio TVS devices that allow greater stress on downstream ICs during surge events.
What is the significance of the "M3" suffix in SMCG6.5CA-M3/9AT?
The "M3" suffix indicates halogen-free, RoHS-compliant construction with matte tin-plated leads meeting J-STD-002 and JESD 22-B102 solderability standards. SMCG6.5CA-M3/9AT also passes JESD 201 Class 2 whisker testing. This makes it suitable for environmentally regulated industries including automotive and industrial automation, where halogen content restrictions and long-term interconnect reliability are mandatory.
Can SMCG6.5CA-M3/9AT be used in place of a unidirectional TVS like SMCG6.5A?
No - SMCG6.5CA-M3/9AT is bidirectional and cannot replace unidirectional devices like SMCG6.5A in DC-biased circuits where forward conduction must be blocked in one direction (e.g., protecting a 5 V supply rail). Attempting substitution risks unintended forward conduction and system malfunction. Always verify polarity requirements and consult the SMCG6.5CA-M3/9AT datasheet section "Polarity" before design-in.
SMCG6.5CA-M3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AB, SMC Gull Wing
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 6.5V
- Voltage - Breakdown (Min):
- 7.22V
- Voltage - Clamping (Max) @ Ipp:
- 11.2V
- Current - Peak Pulse (10/1000µs):
- 133.9A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG6.5CA-M3/9AT FAQ
1.How can I place an order for SMCG6.5CA-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG6.5CA-M3/9AT 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 SMCG6.5CA-M3/9AT reliable?
The price and inventory of SMCG6.5CA-M3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG6.5CA-M3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG6.5CA-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG6.5CA-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG6.5CA-M3/9AT?
SMCG6.5CA-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG6.5CA-M3/9AT 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 SMCG6.5CA-M3/9AT?
For technical support, including SMCG6.5CA-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG6.5CA-M3/9AT requirements.
6.How does Aetrix verify that SMCG6.5CA-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG6.5CA-M3/9AT 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 SMCG6.5CA-M3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG6.5CA-M3/9AT?
All SMCG6.5CA-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG6.5CA-M3/9AT, 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 SMCG6.5CA-M3/9AT part is unused and in its original packaging.
Return procedure for SMCG6.5CA-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG6.5CA-M3/9AT 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
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
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 …
