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Vishay General Semiconductor - Diodes Division SMCG8.0CAHE3/9AT
- Part No.:
- SMCG8.0CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG8.0CAHE3/9AT.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,012
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Product details
Overview
SMCG8.0CAHE3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 8.0 V stand-off voltage (VWM), 13.6 V maximum clamping voltage (VC) at 50 A peak pulse current (IPPM), and 1500 W peak pulse power dissipation (PPPM) with a 10/1000 µs waveform.
For engineers reviewing the SMCG8.0CAHE3/9AT datasheet, SMCG8.0CAHE3/9AT pinout, SMCG8.0CAHE3/9AT application, or SMCG8.0CAHE3/9AT equivalent, this AEC-Q101 qualified, RoHS-compliant TVS offers precise bidirectional clamping for automotive sensor lines, industrial I/O interfaces, and telecom signal protection where fast response (<1 ns), low incremental surge resistance, and stable junction temperature up to +150 °C are critical.
Technical Context
This device operates as a bidirectional avalanche diode, symmetrically clamping voltage transients in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 µA at VWM), while the DO-215AB package supports automated placement and meets UL 94 V-0 flammability rating.
The SMCG8.0CAHE3/9AT delivers 1500 W peak pulse power handling under standardized 10/1000 µs surge conditions, with thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-lead), enabling reliable operation on standard 8.0 mm × 8.0 mm copper pads without forced cooling in most industrial and automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous reverse stand-off voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR min/max | 8.89 V / 9.83 V - Breakdown voltage range at 10 mA test current; ensures consistent turn-on across production lots. |
| VC @ IPPM | 13.6 V at 50 A - Clamping voltage during 10/1000 µs surge; limits protected circuit voltage to safe level during transient events. |
| PPPM | 1500 W - Peak pulse power capability; determines survivability against high-energy surges like ISO 7637-2 Pulse 5a. |
| ID @ VWM | ≤1.0 µA - Reverse leakage current at rated stand-off voltage; minimizes standby power loss and avoids false triggering. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive and high-temperature industrial enclosures. |
| Package | SMCG (DO-215AB) - Surface-mount gull-wing package with matte tin leads; compatible with J-STD-002 soldering and JESD22-B102 whisker testing. |
Pinout & Package
SMCG8.0CAHE3/9AT uses the SMCG (DO-215AB) surface-mount package - a bidirectional device with no polarity marking. The two terminals are symmetrical: each serves as either anode or cathode depending on transient polarity. Mounting requires 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal per Vishay's recommended layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Bidirectional Surge Terminal | Acts as cathode during positive transients and anode during negative transients; no fixed polarity. |
| Terminal 2 | Bidirectional Surge Terminal | Acts as anode during positive transients and cathode during negative transients; electrically identical to Terminal 1. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control, ADAS sensors, and infotainment interfaces. |
| Low clamping ratio (VC/VBR) | ~1.37 (13.6 V / 9.83 V max) - tight voltage control minimizes stress on downstream ICs during surge events. |
| Fast response time | <1 ns - intrinsic avalanche response enables protection against ESD and lightning-induced fast transients before damage occurs. |
| MSL Level 1 | Rated for unlimited floor life at ≤30 °C/60% RH - eliminates bake requirements prior to reflow assembly. |
| Glass passivated junction | Stable electrical characteristics over lifetime and temperature - prevents parameter drift and degradation under repeated surge stress. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector interface to shunt surge energy before it reaches signal conditioning circuitry. Use Value: Maintains signal integrity by limiting transient voltage to ≤13.6 V, preventing latch-up or permanent damage to 5 V or 3.3 V microcontrollers and ADCs. | Use Scenario: Safeguarding digital input/output channels of programmable logic controllers against field-wiring induced surges in factory automation systems. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC I/O lines, coordinated with series impedance to meet IEC 61000-4-5 Level 3 (2 kV/1 kA) immunity requirements. Use Value: Enables compliance with industrial surge immunity standards using a single discrete component with no external bias or timing circuitry required. |
| Telecom Line Interface Protection | Consumer Power Adapter ESD Protection |
Use Scenario: Shielding Ethernet PHYs, RS-485 transceivers, and PoE injectors from lightning-induced common-mode surges on outdoor cabling. IC Role / Device Role / Timing Role: Common-mode TVS pair (used differentially) across twisted-pair lines to clamp differential and common-mode transients simultaneously. Use Value: Provides 1500 W surge handling per line pair while maintaining <1.0 µA leakage at 8.0 V - preserving signal fidelity and minimizing standby current draw. | Use Scenario: Adding secondary-level ESD protection on USB-C, HDMI, or auxiliary power rails in smart home hubs and portable chargers. IC Role / Device Role / Timing Role: Secondary clamping device downstream of primary MOVs or polymer PTCs, absorbing residual fast transients that bypass bulk protection. Use Value: Delivers sub-1 ns response and 13.6 V clamping to protect 5 V tolerant USB PHYs and Type-C CC logic without affecting normal signal rise/fall times. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.0CA | Same VWM (8.0 V) and VC (13.6 V), but lower PPPM (400 W); SMA package (DO-214AC), smaller footprint, higher RθJA (110 °C/W). | Not AEC-Q101 qualified; limited to consumer/industrial use where automotive reliability is not required. | Select when board space is constrained and surge energy is ≤400 W; verify thermal derating for ambient >70 °C. |
| SMCJ8.0CA | Same VWM (8.0 V) and VC (13.6 V), higher PPPM (1500 W), same DO-214AB package; slightly larger body than SMCG but identical thermal performance (RθJA = 75 °C/W). | Also AEC-Q101 qualified; widely used in legacy automotive designs but less optimized for fine-pitch automated placement than SMCG. | Select when existing SMCJ footprint is locked; SMCG8.0CAHE3/9AT offers better placement yield and lower profile in new designs. |
Compared with SMAJ8.0CA and SMCJ8.0CA, the SMCG8.0CAHE3/9AT provides identical clamping performance and AEC-Q101 qualification in a lower-profile, gull-wing package optimized for high-speed pick-and-place - making it preferable for next-generation automotive modules and space-constrained industrial PCBs where thermal and reliability margins must be preserved.
Availability
SMCG8.0CAHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, and telecom line interface applications requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.
Supply support for SMCG8.0CAHE3/9AT 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 reliability, precision, and automotive-grade qualification.
The SMCG series was developed specifically for high-energy, bidirectional transient suppression in harsh environments - targeting automotive powertrain, chassis, and body electronics where AEC-Q101 validation and stable clamping under thermal stress are mandatory.
FAQ
What is the clamping voltage of SMCG8.0CAHE3/9AT at its rated peak pulse current?
The SMCG8.0CAHE3/9AT has a maximum clamping voltage (VC) of 13.6 V when subjected to its rated peak pulse current (IPPM) of 50 A under the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and guarantees that protected circuits will not experience voltages exceeding 13.6 V during such transient events, ensuring compatibility with 5 V and 3.3 V logic interfaces.
Is SMCG8.0CAHE3/9AT suitable for automotive applications?
Yes, SMCG8.0CAHE3/9AT is AEC-Q101 qualified and explicitly rated for automotive use. Its construction - including glass-passivated junction, MSL Level 1 moisture sensitivity, and operation up to +150 °C junction temperature - meets the environmental and reliability requirements for engine control units, ADAS sensors, and body electronics. The HE3 suffix confirms AEC-Q101 qualification per Vishay's ordering nomenclature.
How does the SMCG8.0CAHE3/9AT differ from unidirectional variants like SMCG8.0AHE3/9AT?
The SMCG8.0CAHE3/9AT is bidirectional, meaning it clamps voltage transients of either polarity symmetrically, with no cathode band marking. In contrast, SMCG8.0AHE3/9AT is unidirectional, featuring a cathode band and conducting only in reverse bias - requiring correct orientation during placement. Both share identical VWM (8.0 V), VC (13.6 V), and PPPM (1500 W), but their circuit integration and polarity handling differ fundamentally.
What is the recommended PCB pad layout for SMCG8.0CAHE3/9AT?
Vishay specifies a minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad area for each terminal of the SMCG8.0CAHE3/9AT to achieve rated thermal and surge performance. This layout ensures adequate heat dissipation and current spreading during 1500 W pulse events. Deviating from this recommendation reduces IPPM derating and may compromise long-term reliability under repeated surge stress.
Does SMCG8.0CAHE3/9AT require external biasing or control circuitry?
No, SMCG8.0CAHE3/9AT is a passive, inherently bidirectional avalanche diode requiring no external bias, drive signal, or control logic. It operates automatically - remaining high-impedance below VWM (8.0 V) and transitioning to low-impedance clamping above VBR (~8.89–9.83 V) - making it ideal for simple, robust, zero-footprint protection schemes in signal and power lines.
SMCG8.0CAHE3/9AT 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):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 13.6V
- Current - Peak Pulse (10/1000µs):
- 110.3A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG8.0CAHE3/9AT FAQ
1.How can I place an order for SMCG8.0CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG8.0CAHE3/9AT 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 SMCG8.0CAHE3/9AT reliable?
The price and inventory of SMCG8.0CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG8.0CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG8.0CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG8.0CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG8.0CAHE3/9AT?
SMCG8.0CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG8.0CAHE3/9AT 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 SMCG8.0CAHE3/9AT?
For technical support, including SMCG8.0CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG8.0CAHE3/9AT requirements.
6.How does Aetrix verify that SMCG8.0CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG8.0CAHE3/9AT 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 SMCG8.0CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG8.0CAHE3/9AT?
All SMCG8.0CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG8.0CAHE3/9AT, 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 SMCG8.0CAHE3/9AT part is unused and in its original packaging.
Return procedure for SMCG8.0CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG8.0CAHE3/9AT Tags
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