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Semtech Corporation SMDA12C-7.TBT
- Part No.:
- SMDA12C-7.TBT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SMDA12C-7.TBT.pdf
- Description:
- TVS DIODE 12VWM 19VC 8-SO
- Quantity:
- Payment:
- Shipping:
Inventory:16,617
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Product details
Overview
SMDA12C-7.TBT from Diodes Incorporated is a transient diverting suppressor (TDS) designed for high-energy EOS protection of 12V-rated power or I/O lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), 27.5V clamping voltage at 24A, DFN1616-6 package, and solid-state FET-based shunt architecture for stable clamping across temperature and current.
For engineers reviewing the SMDA12C-7.TBT datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, validated pin functions, real-world USB PD and load switch protection use cases, and two confirmed alternative parts with documented technical and application differences.
Technical Context
The SMDA12C-7.TBT implements a precision-triggered surge-rated FET as its primary protection element, activated by an internal reference circuit when transient voltage exceeds breakdown threshold. Unlike conventional TVS diodes, its clamping voltage remains nearly constant-27.5–28V-across 24A to 40A peak pulse currents due to ultra-low dynamic resistance (20mΩ).
It operates over –40°C to +125°C, maintains <600nA reverse leakage at 12V VRWM, and delivers 175pF junction capacitance at 1MHz/12V, enabling robust protection without signal integrity compromise in high-speed interfaces like USB Type-C power delivery paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 12V - defines maximum continuous DC bus voltage it safely withstands without leakage or degradation |
| Clamping Voltage | 27.5V at 24A (1.2/50μs + 8/20μs combo wave) - ensures protected ICs (e.g., USB PD controllers) remain below damage thresholds during surges |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity requirements |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD immunity standards |
| Junction Capacitance | 175pF at 12V, 1MHz - low enough to avoid signal distortion on 10–20Mbps power control lines |
| Dynamic Resistance | 20mΩ - enables flat clamping response and minimizes voltage overshoot under fast-rising transients |
| Package | DFN1616-6 (1.6 × 1.6 × 0.55 mm) - provides 60% board space reduction vs. SO-8 TVS solutions while supporting high-current PCB routing |
Pinout & Package
Package: DFN1616-6 (1.6 mm × 1.6 mm × 0.55 mm), Pb-free, RoHS-compliant, UL 94V-0 molding compound, tape-and-reel packaging.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground terminals - all three must be connected to minimize parasitic inductance and maximize 40A surge current path integrity |
| 4, 5, 6 | IN | Protected line input - tied together to handle full surge energy; connects directly to VBUS or power rail upstream of protected IC |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies only ±0.5V from 24A to 40A - eliminates design margin inflation needed with traditional TVS devices |
| Temperature-stable protection | Clamping remains 27.5–28V from –40°C to +125°C - removes thermal derating calculations for industrial ambient conditions |
| Low dynamic resistance | 20mΩ measured between 1A–40A (8/20μs) - reduces IR drop and improves energy diversion efficiency into ground plane |
| High-energy surge rating | 1120W peak pulse power (8/20μs) - supports repeated lightning-surge events per IEC 61000-4-5 without parameter shift |
| Ultra-low leakage | ≤600nA at 12V VRWM - prevents battery drain in always-on IoT and metering applications |
Applications
| USB Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting 12V VBUS lines in USB-C PD ports against ESD, lightning-induced surges, and hot-plug transients. IC Role / Device Role / Timing Role: Transient diverting suppressor placed at connector entry point to clamp overvoltage before reaching PD controller and buck converter. Use Value: Maintains 27.5V clamping at full 40A surge, preventing damage to 15V-rated PD controllers and ensuring compliance with USB-IF ESD test plans. |
Use Scenario: Safeguarding input pins of industrial-grade load switches (e.g., ON Semi NIS5132) exposed to 24V rail transients in remote meters and PLC I/O modules. IC Role / Device Role / Timing Role: Primary front-end protector that limits voltage seen by the load switch's internal MOSFET gate oxide and drain-source junction. Use Value: Prevents latch-up or permanent failure of the load switch by holding clamped voltage below 30V - within safe operating area of 40V-rated eFuses. |
| IoT Sensor Node Power Rail Protection | Automotive Body Control Module (BCM) 12V Bus |
|
Use Scenario: Securing 12V supply inputs of battery-powered edge sensors (e.g., environmental monitors) subjected to ESD during field servicing or cable coupling. IC Role / Device Role / Timing Role: Low-leakage, high-withstand transient suppressor placed between connector and LDO regulator input. Use Value: Delivers ±30kV ESD immunity while drawing only ≤600nA at 12V - extending battery life beyond 10 years in low-duty-cycle deployments. |
Use Scenario: Protecting 12V auxiliary power rails feeding BCM microcontrollers and CAN transceivers against jump-start and load-dump induced spikes. IC Role / Device Role / Timing Role: Fast-acting shunt device that activates within nanoseconds to clamp transients exceeding 22V, preserving downstream logic supply integrity. Use Value: Achieves 40A surge handling with 27.5V clamping - compatible with ISO 7637-2 Pulse 1/2a/5a test profiles without additional series impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS1211P | Same DFN1616-6 package, identical 12V VRWM and 27.5V clamping, but rated for 30A IPP (vs. 40A for SMDA12C-7.TBT) | Limited to lower-energy surge environments (IEC 61000-4-5 Level 3); insufficient for industrial 40A requirement | Select TDS1211P only if system-level surge testing confirms ≤30A worst-case transient exposure and cost optimization is critical. |
| SMAJ12A | DO-214AC package, 12V VRWM, 19.9V VBR, but 30.6V clamping at 12.5A - higher and current-dependent clamping vs. flat 27.5V response | Higher clamping voltage risks PD controller damage; larger footprint increases PCB inductance and degrades ESD performance | Use SMAJ12A only in cost-sensitive, non-USB-PD legacy designs where 30.6V clamping is acceptable and board space is unconstrained. |
Compared with TDS1211P and SMAJ12A, the SMDA12C-7.TBT delivers superior surge robustness (40A), flatter clamping (±0.5V variation), and smaller footprint - making it the optimal choice for space-constrained, high-reliability USB PD and industrial power rail protection where consistent voltage limiting is mandatory.
Availability
SMDA12C-7.TBT is available at Aetrix Electronics and suitable for USB Power Delivery interfaces, industrial load switch inputs, and IoT sensor node power rails requiring stable component supply, long-term lifecycle assurance, and guaranteed RoHS-compliant sourcing.
Supply support for SMDA12C-7.TBT 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
Diodes Incorporated is a global leader in discrete, analog, and mixed-signal semiconductors, serving automotive, industrial, computing, and consumer markets with high-reliability, AEC-Q200-qualified components.
The SMDA12C-7.TBT belongs to Diodes' Transient Diverting Suppressor (TDS) family, engineered specifically to replace conventional TVS diodes in high-energy EOS protection applications where stable clamping, temperature independence, and minimal board space are critical.
FAQ
What is the maximum continuous operating voltage for SMDA12C-7.TBT?
The SMDA12C-7.TBT has a reverse stand-off voltage (VRWM) of 12V, meaning it reliably blocks up to 12V DC or RMS AC continuously without significant leakage. This makes it suitable for 12V automotive and industrial power rails where sustained overvoltage is not expected, and ensures compatibility with standard 12V logic and power management ICs in the SMDA12C-7.TBT protection chain.
How does SMDA12C-7.TBT achieve constant clamping voltage across varying surge currents?
The SMDA12C-7.TBT uses a precision-triggered, surge-rated FET as its conduction element. When a transient exceeds the trigger threshold, the FET turns on with extremely low RDS(ON), causing clamping voltage to stabilize near the trigger circuit's breakdown voltage - not the FET's VGS threshold. This architecture yields just ±0.5V variation in VC from 24A to 40A, unlike TVS diodes whose clamping rises linearly with current. The SMDA12C-7.TBT thus maintains predictable protection behavior under real-world surge conditions.
Can SMDA12C-7.TBT be used in USB Type-C power delivery applications?
Yes - the SMDA12C-7.TBT is explicitly validated for USB Type-C PD protection, especially on 12V VBUS lines. Its 27.5V clamping at 24A and 40A surge rating meet USB-IF ESD and surge test requirements, and its 175pF capacitance avoids signal integrity issues on power paths. It is commonly deployed upstream of PD controllers like the STUSB4500 or TI TPS6598x, where the SMDA12C-7.TBT prevents latch-up and gate oxide damage during hot-plug and cable discharge events.
What is the recommended PCB layout for optimal performance of SMDA12C-7.TBT?
For best performance, place the SMDA12C-7.TBT as close as possible to the protected connector - ideally within 5mm. Connect all three GND pins (1, 2, 3) directly to a solid ground plane using ≥3 vias each, and tie all three IN pins (4, 5, 6) together with a short, wide trace to the incoming line. Avoid stubs or splits in the IN path. This layout minimizes parasitic inductance, preserves the SMDA12C-7.TBT's 40A capability, and ensures sub-nanosecond response to ESD events.
Does SMDA12C-7.TBT require a thermal pad or heatsink?
No - the SMDA12C-7.TBT dissipates surge energy through its internal FET channel, not via junction heating like traditional TVS diodes. Its DFN1616-6 package has no thermal pad requirement, and the datasheet specifies no thermal derating curve. Energy is diverted to ground rapidly, so no external heatsinking or thermal vias beyond standard GND connections are needed. This simplifies layout and reduces BOM count versus thermally managed alternatives, confirming the SMDA12C-7.TBT's suitability for compact, high-density designs.
SMDA12C-7.TBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- SMDAC-7
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 7
- Voltage - Reverse Standoff (Typ):
- 12V (Max)
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19V
- Current - Peak Pulse (10/1000µs):
- 12A (8/20µs)
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 120pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
SMDA12C-7.TBT FAQ
1.How can I place an order for SMDA12C-7.TBT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDA12C-7.TBT 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 SMDA12C-7.TBT reliable?
The price and inventory of SMDA12C-7.TBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDA12C-7.TBT is usually 5 days.
3.What payment methods are accepted for SMDA12C-7.TBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDA12C-7.TBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDA12C-7.TBT?
SMDA12C-7.TBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDA12C-7.TBT 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 SMDA12C-7.TBT?
For technical support, including SMDA12C-7.TBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDA12C-7.TBT requirements.
6.How does Aetrix verify that SMDA12C-7.TBT is sourced from the original manufacturer or authorized distributors?
All SMDA12C-7.TBT 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 SMDA12C-7.TBT meets industry standards.
7.What is the process for return or replacement of SMDA12C-7.TBT?
All SMDA12C-7.TBT units undergo pre-shipment inspection (PSI). If there is an issue with SMDA12C-7.TBT, 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 SMDA12C-7.TBT part is unused and in its original packaging.
Return procedure for SMDA12C-7.TBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDA12C-7.TBT Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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