My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMCG12CA-E3/9AT
- Part No.:
- SMCG12CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG12CA-E3/9AT.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,877
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCG12CA-E3/9AT 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 12 V stand-off voltage (VWM), 13.3–14.7 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 µs), clamping voltage of 19.9 V at 75.4 A IPPM, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMCG12CA-E3/9AT datasheet, SMCG12CA-E3/9AT pinout, SMCG12CA-E3/9AT application, or SMCG12CA-E3/9AT equivalent, this device is selected for high-reliability transient suppression in automotive sensor interfaces, industrial I/O lines, and telecom signal conditioning where bidirectional surge immunity and low clamping ratio are critical.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical electrical characteristics in forward and reverse directions - confirmed by VBR min/max and VC values applying "in both directions" per Vishay documentation. Its glass-passivated junction ensures stable leakage (<5 µA at VWM) and fast response time (<1 ns), while the DO-215AB package supports automated SMT placement and meets MSL level 1 (260 °C reflow).
The device delivers 1500 W peak pulse power handling under standardized 10/1000 µs waveform conditions, with thermal resistance RθJA = 75 °C/W and RθJL = 15 °C/W enabling effective heat dissipation on standard 8.0 mm × 8.0 mm copper pads. Junction temperature range spans –55 °C to +150 °C, supporting operation in harsh automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 12 V rail protection. |
| VBR (min/max) | 13.3 V / 14.7 V at 1 mA - guaranteed breakdown threshold ensures predictable turn-on during transients without premature conduction. |
| VC @ IPPM | 19.9 V at 75.4 A - clamping voltage limits downstream IC stress during 1500 W surge events; clamping ratio = 1.66×VWM. |
| PPPM | 1500 W - peak pulse power rating per 10/1000 µs waveform; enables protection against lightning-induced surges and inductive switching spikes. |
| ID @ VWM | ≤5 µA - ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits. |
| TJ Range | –55 °C to +150 °C - extended thermal range supports under-hood automotive, motor control, and industrial ambient conditions. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 standards. |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, low-profile gull-wing leaded package with matte tin-plated terminals, UL 94 V-0 molding compound, and no polarity marking for bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional current path | No polarity marking; either terminal serves as anode or cathode depending on transient polarity - enables single-device protection of AC or differential lines. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC in both directions eliminates need for dual unidirectional devices in AC/symmetric signal paths. |
| Glass-passivated junction | Enhances long-term stability of leakage current and breakdown voltage under thermal cycling and humidity stress. |
| MSL Level 1 rating | Enables standard SMT reflow without pre-baking; compatible with high-volume automated assembly at peak 260 °C. |
| AEC-Q101 qualification | Validates suitability for automotive applications including engine control units, ADAS sensors, and body electronics. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a/5a), improving system-level EMC robustness. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN, LIN, or analog sensor outputs (e.g., pressure, temperature) from load-dump and jump-start transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed at connector interface to clamp ±200 V transients before reaching signal conditioning circuitry. Use Value: Clamps to 19.9 V within nanoseconds, preventing latch-up or damage to 3.3 V/5 V ADC inputs and transceivers while maintaining AEC-Q101 compliance. |
Use Scenario: Safeguarding PLC digital input modules exposed to inductive kickback from solenoids, relays, and motor drives. IC Role / Device Role / Timing Role: Primary surge suppression element on 24 V DC field wiring, mounted directly at terminal block entry point. Use Value: Absorbs 1500 W pulses without degradation, enabling >100,000 surge cycles per IEC 61000-4-5 Level 4 compliance testing. |
| Telecom Line Protection | Consumer Power Adapter Input |
Use Scenario: Shielding Ethernet PHY or RS-485 transceivers from ESD and lightning-induced surges in outdoor network equipment. IC Role / Device Role / Timing Role: Secondary protection stage after gas discharge tube (GDT), providing low-clamp backup for fast transients. Use Value: 19.9 V clamping ensures transceiver I/O remains below absolute maximum ratings even during combined ESD + surge events. |
Use Scenario: Input-stage transient suppression on 12 V wall adapters used in smart home hubs and audio systems. IC Role / Device Role / Timing Role: First-line defense against mains-borne surges entering via AC-DC converter secondary side. Use Value: Low leakage (<5 µA) avoids standby power waste; DO-215AB footprint allows compact layout adjacent to input capacitors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12CA | Same VWM (12 V), lower PPPM (400 W), SMA (DO-214AC) package - smaller footprint but reduced surge capacity. | Limited to consumer-grade or low-energy industrial signals; not AEC-Q101 qualified. | Select when board space is constrained and surge threat level is ≤IEC 61000-4-5 Level 2. |
| SMBJ12CA | Same VWM (12 V), higher PPPM (600 W), SMB (DO-214AA) package - intermediate power handling and thermal performance. | Suitable for mid-tier automotive modules (e.g., infotainment) but lacks full AEC-Q101 validation per Vishay spec. | Choose for cost-sensitive designs requiring better surge margin than SMAJ but without full automotive qualification. |
Compared with SMCG12CA-E3/9AT, SMAJ12CA offers smaller size at the expense of 73% lower peak power handling and no automotive qualification, while SMBJ12CA provides moderate surge capability in a widely available package but lacks the 1500 W rating and AEC-Q101 validation essential for safety-critical automotive nodes.
Availability
SMCG12CA-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, and telecom line conditioning requiring stable component supply, traceable sourcing, and long-term lifecycle support.
Supply support for SMCG12CA-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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMCG series was developed to deliver high-power, AEC-Q101-qualified TVS protection in a thermally efficient DO-215AB package for next-generation automotive and industrial systems demanding robust transient immunity.
FAQ
What is the clamping voltage of SMCG12CA-E3/9AT and how does it protect downstream components?
The SMCG12CA-E3/9AT clamps to 19.9 V at its rated peak pulse current of 75.4 A (10/1000 µs waveform). This limits voltage seen by protected ICs - such as microcontrollers or transceivers - well below their absolute maximum ratings. Its low clamping ratio (1.66×VWM) ensures minimal overvoltage stress during fast transients like ESD or inductive switching spikes, preserving signal integrity and device longevity.
Is SMCG12CA-E3/9AT suitable for automotive applications?
Yes, SMCG12CA-E3/9AT is AEC-Q101 qualified and explicitly rated for automotive use per Vishay documentation. Its –55 °C to +150 °C operating range, MSL Level 1 reflow compatibility, and validation across temperature cycling, HTRB, and ESD tests make it appropriate for engine control units, ADAS sensors, and body electronics where reliability under harsh conditions is mandatory.
How does the bidirectional design of SMCG12CA-E3/9AT differ from unidirectional TVS diodes?
Unlike unidirectional TVS diodes that conduct only in reverse bias, SMCG12CA-E3/9AT provides symmetrical clamping in both polarities due to its bidirectional construction - confirmed by identical VBR and VC specifications in each direction. This eliminates polarity concerns during layout and enables protection of AC-coupled, differential, or floating signal lines without external diode pairing.
What is the package type and mounting compatibility of SMCG12CA-E3/9AT?
SMCG12CA-E3/9AT uses the SMCG (DO-215AB) package - a surface-mount gull-wing leaded outline with 0.220–0.245 inch body width and 0.038–0.058 inch lead span. It is compatible with standard SMT pick-and-place equipment, supports reflow up to 260 °C (MSL Level 1), and mounts on 8.0 mm × 8.0 mm copper pads per Vishay's thermal recommendations for optimal power dissipation.
Does SMCG12CA-E3/9AT require a heatsink for 1500 W surge handling?
No external heatsink is required for single-event 1500 W surge handling, as the SMCG12CA-E3/9AT relies on short-duration pulse energy absorption rather than steady-state power dissipation. Its RθJA = 75 °C/W and RθJL = 15 °C/W are specified for transient thermal impedance, and Vishay validates the 1500 W rating using standard 8.0 mm × 8.0 mm copper pads - no additional thermal mass needed for compliant surge testing.
SMCG12CA-E3/9AT 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):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- 75.4A
- 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)
SMCG12CA-E3/9AT FAQ
1.How can I place an order for SMCG12CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG12CA-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 SMCG12CA-E3/9AT reliable?
The price and inventory of SMCG12CA-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 SMCG12CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG12CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG12CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG12CA-E3/9AT?
SMCG12CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG12CA-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 SMCG12CA-E3/9AT?
For technical support, including SMCG12CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG12CA-E3/9AT requirements.
6.How does Aetrix verify that SMCG12CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG12CA-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 SMCG12CA-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG12CA-E3/9AT?
All SMCG12CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG12CA-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 SMCG12CA-E3/9AT part is unused and in its original packaging.
Return procedure for SMCG12CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG12CA-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
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 …
