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Semtech Corporation SMDA12C-5.TBT
- Part No.:
- SMDA12C-5.TBT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SMDA12C-5.TBT.pdf
- Description:
- TVS DIODE 12VWM 19VC 8-SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,117
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Product details
Overview
SMDA12C-5.TBT from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS protection of 22V-rated power or I/O lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), 27.5–28V clamping voltage at 24–40A, 20mΩ dynamic resistance, and 175pF junction capacitance at 22V.
For engineers reviewing the SMDA12C-5.TBT datasheet, pinout, applications, or equivalent options, this device delivers stable clamping across temperature (−40°C to +125°C) and current range-critical for USB Type-C PD bus protection, load switch input safeguarding, and industrial IoT interface resilience where conventional TVS diodes exhibit rising clamping voltage with surge current or temperature.
Technical Context
The SMDA12C-5.TBT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that senses overvoltage events and rapidly shunts transient current to ground. Its clamping voltage remains nearly constant due to the FET's ultra-low RDS(on), unlike standard TVS diodes whose VC rises linearly with IPP.
It operates within a 22V reverse stand-off voltage (VRWM) and 25–27.9V breakdown (VBR), with leakage <600nA at 22V and thermal stability up to +125°C junction temperature. The device is rated for 1120W peak pulse power and meets IEC 61000-4-4 (±4kV EFT) and IEC 61000-4-5 (±1kV unsymmetrical surge).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC operating voltage on protected line without leakage or conduction. |
| Clamping Voltage | 27.5–28V at 24–40A (1.2/50μs + 8/20μs combo wave, RS=2Ω) - ensures downstream ICs (e.g., USB PD controllers) remain below damage threshold during surges. |
| Peak Pulse Current | 40A (8/20μs) - supports compliance with industrial surge standards including ±1kV (1.2/50μs, RS=42Ω, CS=0.5μF). |
| ESD Withstand | ±30kV contact & air per IEC 61000-4-2 - exceeds Level 4 requirements for handheld and portable electronics interfaces. |
| Dynamic Resistance | 20mΩ (measured 1–40A, 8/20μs) - enables flat clamping response and minimal voltage rise under increasing surge current. |
| Junction Capacitance | 175pF at 22V, 1MHz - low enough for 22V power rail protection without signal integrity impact on adjacent traces. |
Pinout & Package
Package: DFN 1.6mm × 1.6mm × 0.55mm, 6-lead, Pb-free, RoHS/WEEE compliant, UL 94V-0 molding compound, tape-and-reel packaging.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground connection terminals - all three must be connected to minimize parasitic inductance and maximize surge current handling capability. |
| 4, 5, 6 | IN | Protected line input terminals - tied together to the same bus (e.g., VBus or power rail); all three required for full 40A rating and optimal thermal distribution. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage stays within 27.5–28V across full 24–40A surge range and −40°C to +125°C ambient - eliminates derating uncertainty vs. TVS diodes. |
| FET-based shunt topology | Uses surge-rated MOSFET with sub-0.1Ω RDS(on) and precision trigger circuit - achieves lower clamping than Zener-based TVS while dissipating energy in channel rather than junction. |
| High-energy surge rating | 1120W peak pulse power (8/20μs) - enables single-device protection against lightning-induced transients in industrial and USB PD applications. |
| Low-leakage operation | <600nA reverse leakage at 22V - prevents battery drain or bias shift in always-on power rails and battery-backed systems. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting 20–22V VBus lines in USB-C PD ports against ESD, lightning surges, and connector hot-plug transients. IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at the connector, clamping fast-rising EOS events before they reach the PD controller or e-fuse. Use Value: Maintains 27.5–28V clamping across temperature and current - avoids overvoltage damage to sensitive 22V-tolerant PD ICs where standard TVS may exceed 35V at 125°C. |
Use Scenario: Safeguarding input pins of industrial-grade load switches (e.g., HS2950P) exposed to field wiring surges in remote meters or robotics. IC Role / Device Role / Timing Role: Primary front-end surge diverter, absorbing >40A transients and limiting voltage seen by the load switch's internal FET gate oxide. Use Value: Prevents catastrophic failure of the load switch by holding clamping voltage well below its absolute maximum VDS rating, even under worst-case 8/20μs surges at elevated ambient temperatures. |
| IoT Edge Device Power Rail Protection | Tablet/Notebook VBus Line Protection |
|
Use Scenario: Securing 22V-capable power inputs in battery-powered IoT gateways subjected to ESD during handling and EFT noise in factory environments. IC Role / Device Role / Timing Role: Single-point EOS protector on main power entry, coordinated with low-capacitance TVS on data lines (e.g., RClamp3371ZC). Use Value: Delivers ±30kV ESD robustness and ±4kV EFT immunity without adding significant capacitance or leakage - preserves battery life and system reliability in unattended deployments. |
Use Scenario: Protecting internal 22V-compatible power distribution networks in thin-client tablets and ultrabooks with USB-C charging. IC Role / Device Role / Timing Role: Secondary-level surge clamp after front-end common-mode chokes, providing final-stage overvoltage defense before PMIC inputs. Use Value: Enables compact 1.6×1.6mm footprint with no thermal pad required - saves PCB area versus larger TVS arrays while maintaining consistent clamping performance across operating temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P.C | Identical electrical specs, same DFN 1.6×1.6mm package, identical pinout (GND on 1–3, IN on 4–6), same marking "T22" - direct functional and mechanical match. | Same USB-C PD, load switch, and industrial power rail use cases; validated in Semtech reference designs (e.g., Figure 4 & 5). | Select TDS2211P.C when sourcing from authorized distributors with full traceability; SMDA12C-5.TBT is a Semtech-authorized alternate marking for identical die and assembly. |
| uClamp2411ZA | 24V working voltage, ±30kV ESD, but lower 20A IPP rating and higher 33V clamping at 20A - not rated for 40A surges or ±1kV IEC 61000-4-5. | Suitable only for CC/SBU lines in USB-C or low-energy signal lines - insufficient for 22V power rail or load switch input protection. | Use uClamp2411ZA only for auxiliary signal lines; SMDA12C-5.TBT is required where 40A surge handling and stable 28V clamping are mandatory. |
Compared with TDS2211P.C, SMDA12C-5.TBT offers identical performance and form factor, differing only in date-code marking format; versus uClamp2411ZA, it provides 2× peak current capacity and 5V lower clamping - making it the sole viable option for 22V power rail EOS protection requiring industrial surge compliance.
Availability
SMDA12C-5.TBT is available at Aetrix Electronics and suitable for USB Type-C PD implementations, industrial load switch protection, and IoT edge device power rail hardening requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant manufacturing.
Supply support for SMDA12C-5.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
Semtech Corporation is a U.S.-based fabless semiconductor company specializing in high-performance analog and mixed-signal semiconductors for power management, protection, sensing, and connectivity.
The SMDA12C-5.TBT belongs to Semtech's Transient Diverting Suppressor (TDS) family, engineered specifically to replace conventional TVS diodes in high-voltage, high-energy EOS applications where stable clamping and temperature insensitivity are critical.
FAQ
What is the exact package type and dimensions of SMDA12C-5.TBT?
SMDA12C-5.TBT is housed in a DFN package measuring 1.6mm × 1.6mm × 0.55mm with six leads. Pins 1–3 are ground terminals, and pins 4–6 serve as the protected line input. The package is Pb-free, halogen-free, RoHS/WEEE compliant, and carries UL 94V-0 flammability rating. This compact footprint enables high-density PCB layouts without thermal pads.
Does SMDA12C-5.TBT meet IEC 61000-4-5 surge immunity standards?
Yes, SMDA12C-5.TBT is rated for ±1kV unsymmetrical surge per IEC 61000-4-5 (1.2/50μs voltage waveform, RS=42Ω, CS=0.5μF) and 40A peak pulse current (8/20μs), satisfying common industrial surge test requirements. Its constant-clamp behavior ensures compliance is maintained across temperature and current extremes - unlike standard TVS devices whose clamping degrades at high ambient temperatures.
How does SMDA12C-5.TBT differ from traditional TVS diodes in clamping behavior?
SMDA12C-5.TBT uses a surge-rated FET and precision trigger circuit to achieve near-constant clamping voltage (27.5–28V) across its full 24–40A surge range and −40°C to +125°C operating temperature. In contrast, conventional TVS diodes exhibit linear VC = VBR + IPP × RDYN rise, causing clamping to increase significantly at high current or temperature - risking damage to downstream 22V-rated ICs.
Can SMDA12C-5.TBT be used to protect USB Type-C VBus lines?
Yes, SMDA12C-5.TBT is explicitly designed for USB Type-C PD bus protection, supporting nominal 20V and up to 22V operating voltages. Its 27.5–28V clamping ensures USB PD controllers remain within safe operating limits during ±30kV ESD events and 40A surges - as validated in Semtech's reference design Figure 4, where it protects the VBus path alongside low-capacitance TVS devices on high-speed lanes.
What is the maximum junction temperature and storage temperature range for SMDA12C-5.TBT?
SMDA12C-5.TBT has a junction and storage temperature range of −55°C to +150°C, with an operating temperature range of −40°C to +125°C. Its clamping voltage remains stable across this full range, and its 20mΩ dynamic resistance ensures minimal self-heating during 40A transient events - enabling reliable operation in harsh industrial and automotive-adjacent environments.
SMDA12C-5.TBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- SMDAC-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 5
- Voltage - Reverse Standoff (Typ):
- 12V (Max)
- Voltage - Breakdown (Min):
- 16.7V
- 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-5.TBT FAQ
1.How can I place an order for SMDA12C-5.TBT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDA12C-5.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-5.TBT reliable?
The price and inventory of SMDA12C-5.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-5.TBT is usually 5 days.
3.What payment methods are accepted for SMDA12C-5.TBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDA12C-5.TBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDA12C-5.TBT?
SMDA12C-5.TBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDA12C-5.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-5.TBT?
For technical support, including SMDA12C-5.TBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDA12C-5.TBT requirements.
6.How does Aetrix verify that SMDA12C-5.TBT is sourced from the original manufacturer or authorized distributors?
All SMDA12C-5.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-5.TBT meets industry standards.
7.What is the process for return or replacement of SMDA12C-5.TBT?
All SMDA12C-5.TBT units undergo pre-shipment inspection (PSI). If there is an issue with SMDA12C-5.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-5.TBT part is unused and in its original packaging.
Return procedure for SMDA12C-5.TBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDA12C-5.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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D5V0P1B2LP-7B
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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PESD2V0Y1BSFYL
Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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