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Semtech Corporation SMDA24.TBT
- Part No.:
- SMDA24.TBT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SMDA24.TBT.pdf
- Description:
- TVS DIODE 24VWM 55VC 8-SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,238
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Product details
Overview
SMDA24.TBT from Semtech is a transient diverting suppressor designed for EOS protection of 24V-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 40A, 20mΩ dynamic resistance, and 175pF junction capacitance in a DFN 1.6×1.6×0.55mm 6-lead package-used in USB Type-C PD input protection.
For engineers reviewing the SMDA24.TBT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature and current, low dynamic resistance for minimal voltage overshoot, compact DFN layout compatibility, and compliance with industrial surge standards (IEC 61000-4-5 ±1kV).
Technical Context
SMDA24.TBT employs a surge-rated FET as its primary protection element, activated by a precision trigger circuit that turns on the shunt path when transient voltage exceeds breakdown. Unlike conventional TVS diodes, its clamping voltage remains nearly constant (27.5–28V) from 24A to 40A due to decreasing RDS(on) under surge conditions.
The device delivers stable performance across –40°C to +125°C operating temperature, with reverse stand-off voltage of 24V, breakdown voltage of 27–29.9V, and leakage current ≤600nA at VRWM-enabling robust protection for high-voltage USB PD and industrial load switch inputs without thermal derating penalties.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 24 V - defines maximum continuous DC bus voltage before activation |
| Clamping Voltage | 27.5–28 V at 40A (8/20μs) - limits transient overvoltage seen by downstream ICs |
| Peak Pulse Current | 40 A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity requirements |
| ESD Withstand | ±30 kV contact & air (IEC 61000-4-2) - exceeds industrial ESD immunity thresholds |
| Dynamic Resistance | 20 mΩ - ensures minimal voltage rise during high-current transients |
| Junction Capacitance | 175 pF at 24V - compatible with 24V power rail protection without signal integrity impact |
Pinout & Package
Package: DFN 1.6 mm × 1.6 mm × 0.55 mm, 6-lead, RoHS-compliant, UL 94V-0 molding compound, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path for surge current; all three pins must be connected to maximize current handling and minimize inductance |
| 4, 5, 6 | IN | Protected line input (e.g., VBUS or power rail); parallel connection ensures uniform current sharing and optimal clamping |
Key Features
| Feature | Design Value |
|---|---|
| FET-based clamping architecture | Delivers flat clamping voltage (27.5–28V) across full 24–40A surge range, unlike TVS diodes whose VC rises linearly with IPP |
| Temperature-stable protection | Clamping voltage variation <0.5V from –40°C to +125°C enables reliable operation in industrial ambient conditions |
| Low dynamic resistance | 20mΩ RDYN minimizes IR drop during surge, preserving margin between clamping and downstream IC absolute max ratings |
| High-energy surge rating | 1120W peak pulse power supports repeated ±1kV (1.2/50μs) surges per IEC 61000-4-5 with RS = 42Ω |
Applications
| USB Type-C Power Delivery Input Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20–24V VBUS lines in USB-C PD ports against lightning-induced surges and connector ESD events. IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at the connector, shunting surge energy to ground before it reaches the PD controller or load switch. Use Value: Maintains clamping at 27.5–28V across temperature and current-preventing damage to 24V-tolerant PD controllers where standard TVS devices exceed safe voltage margins at elevated temperatures. | Use Scenario: Safeguarding enable or input rails of industrial-grade load switches (e.g., HS2950P) exposed to field wiring transients. IC Role / Device Role / Timing Role: Primary front-end EOS protector that limits transient overvoltage to stay below the internal FET's drain-source breakdown rating. Use Value: Enables use of cost-optimized load switches without requiring higher-voltage, derated components-reducing BOM cost while meeting IEC 61000-4-5 Level 4 immunity. |
| IoT Device Power Rail Protection | Remote Metering System Surge Suppression |
Use Scenario: Securing 24V auxiliary power inputs in battery-backed IoT gateways subjected to EFT bursts and contact ESD. IC Role / Device Role / Timing Role: Solid-state transient suppressor replacing bulkier MOV+TVS stacks, providing fast response (<1ns trigger) and repeatable performance over lifetime. Use Value: 175pF capacitance avoids filtering or regulation loop instability; ±4kV EFT immunity (IEC 61000-4-4) ensures reliable operation in electrically noisy environments. | Use Scenario: Protecting 24V DC input of smart electricity/water meters installed in outdoor substations or utility cabinets. IC Role / Device Role / Timing Role: First-line defense against induced surges from nearby lightning strikes on distribution lines or grounding faults. Use Value: 40A peak pulse capability handles worst-case 8/20μs surges; -40°C to +125°C operation guarantees functionality across extreme environmental deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P | 22V working voltage, 27.5–28V clamping, same DFN package | Optimized for 22V systems (e.g., legacy USB PD, 24V nominal with derating) | Select when system nominal voltage is ≤22V and tighter clamping margin is required below 24V rails |
| uClamp2411ZA | 24V working voltage, 33V clamping at 12A, 0.25pF capacitance | Designed for low-capacitance data line protection (CC/SBU), not power rail | Use only for signal-level protection; insufficient peak current (12A) and higher clamping make it unsuitable as direct replacement for SMDA24.TBT in power rail roles |
Compared with TDS2211P, SMDA24.TBT offers higher working voltage headroom for 24V systems while retaining identical clamping stability and package footprint; versus uClamp2411ZA, it provides 3.3× higher surge current rating and 5.5V lower clamping-making it the sole suitable option for 24V power rail EOS suppression.
Availability
SMDA24.TBT is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, IoT device power rails, and remote metering systems requiring stable component supply and long-term lifecycle support.
Supply support for SMDA24.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 analog and mixed-signal ICs for precision protection, sensing, and connectivity.
SMDA24.TBT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace traditional TVS diodes in high-reliability 24V power rail protection with superior clamping consistency and temperature stability.
FAQ
What is the maximum continuous operating voltage for SMDA24.TBT?
SMDA24.TBT has a reverse stand-off voltage (VRWM) of 24 V, meaning it remains non-conductive up to this DC or RMS voltage under normal operation. Exceeding 24 V may cause premature conduction or degradation. This rating aligns with 24V industrial and USB PD power delivery systems where precise voltage margin control is critical.
How does SMDA24.TBT achieve stable clamping voltage across varying surge currents?
SMDA24.TBT uses a surge-rated FET activated by a precision trigger circuit. As peak pulse current increases from 24A to 40A, the FET's RDS(on) decreases, counteracting IR rise-resulting in a near-constant clamping voltage of 27.5–28V. This behavior is confirmed in the datasheet's clamping vs. IPP curves and differs fundamentally from TVS diodes, whose VC rises linearly with current.
Can SMDA24.TBT be used in place of a standard TVS diode for 24V rail protection?
Yes-SMDA24.TBT is specifically intended as a high-performance alternative to TVS diodes in 24V applications. Its 20mΩ dynamic resistance, flat clamping profile, and temperature-invariant performance provide superior protection margin compared to conventional TVS devices, especially in thermally demanding environments where TVS clamping voltage drifts significantly.
What is the recommended PCB layout for optimal surge performance of SMDA24.TBT?
Place SMDA24.TBT as close as possible to the protected connector. Connect all three IN pins (4,5,6) via a single low-inductance trace to the protected line, and tie all three GND pins (1,2,3) directly to a solid ground plane using multiple vias. Avoid thermal pads-energy is dissipated internally, and excessive copper under the package can impede heat transfer during repetitive surges.
Does SMDA24.TBT meet IEC 61000-4-5 surge immunity requirements?
Yes-SMDA24.TBT is rated for 40A peak pulse current (8/20μs waveform) and withstands ±1kV combination wave surges (1.2/50μs voltage, 8/20μs current, RS = 42Ω), satisfying IEC 61000-4-5 Level 4 for industrial environments. Its clamping voltage remains ≤28V under these conditions, ensuring downstream components remain within safe operating limits.
SMDA24.TBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- SMDA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 24V (Max)
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 55V
- Current - Peak Pulse (10/1000µs):
- 5A (8/20µs)
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 60pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
SMDA24.TBT FAQ
1.How can I place an order for SMDA24.TBT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDA24.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 SMDA24.TBT reliable?
The price and inventory of SMDA24.TBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDA24.TBT is usually 5 days.
3.What payment methods are accepted for SMDA24.TBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDA24.TBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDA24.TBT?
SMDA24.TBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDA24.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 SMDA24.TBT?
For technical support, including SMDA24.TBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDA24.TBT requirements.
6.How does Aetrix verify that SMDA24.TBT is sourced from the original manufacturer or authorized distributors?
All SMDA24.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 SMDA24.TBT meets industry standards.
7.What is the process for return or replacement of SMDA24.TBT?
All SMDA24.TBT units undergo pre-shipment inspection (PSI). If there is an issue with SMDA24.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 SMDA24.TBT part is unused and in its original packaging.
Return procedure for SMDA24.TBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDA24.TBT Tags
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