My Inquiry
My Account
Semtech Corporation SMDA24C-7.TBT
- Part No.:
- SMDA24C-7.TBT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SMDA24C-7.TBT.pdf
- Description:
- TVS DIODE 24VWM 43VC 8-SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,132
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMDA24C-7.TBT from Diodes Incorporated is a transient voltage suppression diode array designed for unidirectional EOS/ESD protection of one 24V-rated I/O or power line, featuring ±30kV IEC 61000-4-2 contact discharge capability, 40A peak pulse current (8/20μs), and 27.5V clamping voltage at 24A - deployed in USB PD input protection, industrial load switch inputs, and IoT device bus lines.
For engineers reviewing the SMDA24C-7.TBT datasheet, pinout, applications, or equivalent options, key selection criteria include working voltage match (24V), low dynamic resistance (20mΩ), stable clamping across temperature (−40°C to +125°C), junction capacitance (175pF @ 22V), and DFN1616-6 package compatibility with high-density PCB layouts.
Technical Context
SMDA24C-7.TBT implements a solid-state transient diverting architecture using a surge-rated FET as the primary shunt element, activated by a precision trigger circuit when overvoltage exceeds breakdown threshold. Unlike conventional TVS diodes, its clamping voltage remains nearly constant across 24–40A peak pulse current due to decreasing RDS(on) under surge conditions.
The device operates with reverse stand-off voltage of 24V, breakdown voltage of 27.9V (typ), and maintains <28V clamping up to 40A (8/20μs) with 2Ω source impedance. Its 175pF junction capacitance at 22V and 1MHz enables use on moderate-speed power/data lines without signal integrity compromise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 24V - matches nominal VBus in USB PD 3.0 and industrial 24V supply rails. |
| Clamping Voltage | 27.5V @ 24A (1.2/50μs + 8/20μs combo wave) - stays below 28V across full rated current, protecting 30V-tolerant ICs. |
| Peak Pulse Current | 40A (8/20μs) - satisfies IEC 61000-4-5 Level 4 surge immunity for industrial equipment. |
| ESD Withstand | ±30kV contact / ±30kV air (IEC 61000-4-2) - exceeds automotive and industrial ESD robustness requirements. |
| Junction Capacitance | 175pF @ 22V, 1MHz - suitable for DC/low-speed power lines (e.g., VBus, enable, load switch IN), not high-speed data. |
| Dynamic Resistance | 20mΩ - ensures minimal voltage rise under surge, enabling tighter clamping than TVS diodes. |
| Operating Temp | −40°C to +125°C - supports extended industrial and automotive under-hood environments. |
Pinout & Package
Package: DFN1616-6 (1.6mm × 1.6mm × 0.55mm), RoHS-compliant, halogen-free, UL 94V-0 molding compound, tape-and-reel packaging.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return path; all three must be connected to minimize parasitic inductance during 40A surge events. |
| Pins 4, 5, 6 | IN | Protected line input; tied together to distribute surge current across parallel bond wires and enhance reliability. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage deviates ≤0.5V from 27.5V across 24–40A and −40°C to +125°C - eliminates derating uncertainty vs. TVS diodes. |
| Low dynamic resistance | 20mΩ enables sub-1V IR drop at 40A, delivering predictable clamping independent of surge magnitude. |
| High-energy surge rating | 1120W peak pulse power (8/20μs) supports repeated lightning-surge exposure in industrial gateways and metering. |
| Ultra-low leakage | 600nA max reverse leakage at 24V ensures negligible standby power loss in battery-backed IoT nodes. |
| Space-efficient DFN | 1.6mm × 1.6mm footprint saves >60% board area vs. SO-8 TVS solutions while maintaining thermal performance. |
Applications
| USB Power Delivery Input Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting the VBus input of USB PD controllers (e.g., STUSB4500, CYPD3177) against ±1kV IEC 61000-4-5 surges and ±30kV ESD events. IC Role / Device Role / Timing Role: Primary shunt protector placed between Type-C connector and load switch input, clamping transients before they reach downstream FET gates. Use Value: Maintains 27.5V clamping at 40A - well below 30V absolute maximum rating of most PD controllers, preventing latch-up or gate oxide damage. |
Use Scenario: Safeguarding the input of industrial-grade load switches (e.g., ON Semiconductor NIS513x, Diodes AP22653) in remote sensors and PLC I/O modules. IC Role / Device Role / Timing Role: Front-end transient suppressor on 24V supply rail, absorbing lightning-induced surges before they stress internal eFuse circuitry. Use Value: 40A surge handling and −40°C to +125°C operation ensure reliable protection in outdoor enclosures and factory-floor environments. |
| IoT Device Power Bus Protection | Tablet/Notebook Auxiliary Rail Protection |
|
Use Scenario: Securing 24V auxiliary rails powering cellular modems, GNSS receivers, or motor drivers in battery-operated smart meters and asset trackers. IC Role / Device Role / Timing Role: Standalone EOS suppressor on main power entry point, coordinated with upstream fuse and downstream LDOs. Use Value: 175pF capacitance avoids resonance issues on 24V DC distribution networks; 600nA leakage preserves multi-year battery life. |
Use Scenario: Protecting 24V DC-in rails in convertible tablets and ruggedized notebooks where external adapters connect via barrel jacks or proprietary connectors. IC Role / Device Role / Timing Role: First-line defense against user-induced ESD and adapter plug/unplug transients on AC/DC adapter input paths. Use Value: Compact DFN1616-6 allows placement directly at connector pad - minimizing trace inductance and improving clamping response time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P (Semtech) | 22V working voltage, identical 40A/27.5V clamping, same DFN1616-6 package but marked T22XX. | Optimized for 22V USB PD systems; slightly lower VRWM may require revalidation in 24V designs. | Select when VRWM margin is acceptable and Semtech ecosystem alignment is preferred. |
| SMAJ24A (Littelfuse) | 24V VRWM, 38.9V clamping @ 10A (8/20μs), DO-214AC package, higher dynamic resistance (~0.5Ω). | Larger footprint, higher clamping voltage limits use to less sensitive 24V circuits; no temperature stability guarantee. | Choose only if legacy through-hole or larger SMT layout exists and clamping >35V is tolerable. |
Compared with SMDA24C-7.TBT, TDS2211P offers tighter voltage matching for 22V systems but requires VRWM verification at 24V, while SMAJ24A trades compactness and clamping stability for broader vendor availability and simpler qualification - neither is pin-compatible, and both demand layout revision.
Availability
SMDA24C-7.TBT is available at Aetrix Electronics and suitable for USB Power Delivery interfaces, industrial load switch inputs, and IoT device 24V power buses requiring stable component supply, long-term lifecycle support, and consistent surge performance across temperature extremes.
Supply support for SMDA24C-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 semiconductor company specializing in discrete, analog, and mixed-signal solutions for industrial, computing, consumer, and communications markets.
SMDA24C-7.TBT belongs to Diodes' Transient Voltage Suppression portfolio, engineered specifically for high-reliability, space-constrained 24V system protection where stable clamping and low leakage are critical.
FAQ
What is the maximum clamping voltage of SMDA24C-7.TBT at 40A surge current?
The SMDA24C-7.TBT clamps at 27.6–28.0V under 40A peak pulse current (1.2/50μs voltage + 8/20μs current combination waveform, 2Ω source impedance), per its datasheet Electrical Characteristics table. This stable clamping is enabled by its FET-based architecture and remains consistent across −40°C to +125°C operating temperature.
Can SMDA24C-7.TBT replace a standard TVS diode like SMAJ24A in an existing design?
SMDA24C-7.TBT can functionally replace SMAJ24A in 24V protection roles, but it is not a drop-in replacement: SMAJ24A uses DO-214AC packaging and has higher clamping (38.9V @ 10A), whereas SMDA24C-7.TBT uses DFN1616-6 and clamps at 27.5V @ 24A. Layout redesign and thermal validation are required due to different footprints and superior energy handling.
Does SMDA24C-7.TBT support bidirectional transient protection?
No, SMDA24C-7.TBT is a unidirectional transient suppressor designed for positive-going surges on 24V DC lines. Its electrical characteristics - including reverse stand-off voltage (24V), breakdown voltage (27.9V typ), and specified clamping behavior - apply only to forward-biased operation relative to GND. For bidirectional protection, a separate solution such as a symmetric TVS array is required.
What is the junction capacitance of SMDA24C-7.TBT and how does it affect circuit performance?
SMDA24C-7.TBT exhibits 175pF junction capacitance at 22V and 1MHz. This value is appropriate for DC and low-frequency power lines (e.g., VBus, enable signals, load switch inputs) but unsuitable for high-speed data lines like USB 2.0 or PCIe, where sub-1pF capacitance is typically required to avoid signal distortion or attenuation.
How does the thermal performance of SMDA24C-7.TBT compare to traditional TVS diodes under repeated surge stress?
SMDA24C-7.TBT dissipates surge energy primarily through its low-RDS(on) FET channel rather than a PN junction, resulting in lower localized heating and more stable clamping across temperature. Unlike TVS diodes whose clamping voltage rises with ambient temperature, SMDA24C-7.TBT maintains ≤28V clamping from −40°C to +125°C - confirmed in its Typical Characteristics graphs - making it more reliable in thermally demanding deployments.
SMDA24C-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):
- 24V (Max)
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 43V
- Current - Peak Pulse (10/1000µs):
- 5A (8/20µs)
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 50pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
SMDA24C-7.TBT FAQ
1.How can I place an order for SMDA24C-7.TBT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDA24C-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 SMDA24C-7.TBT reliable?
The price and inventory of SMDA24C-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 SMDA24C-7.TBT is usually 5 days.
3.What payment methods are accepted for SMDA24C-7.TBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDA24C-7.TBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDA24C-7.TBT?
SMDA24C-7.TBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDA24C-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 SMDA24C-7.TBT?
For technical support, including SMDA24C-7.TBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDA24C-7.TBT requirements.
6.How does Aetrix verify that SMDA24C-7.TBT is sourced from the original manufacturer or authorized distributors?
All SMDA24C-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 SMDA24C-7.TBT meets industry standards.
7.What is the process for return or replacement of SMDA24C-7.TBT?
All SMDA24C-7.TBT units undergo pre-shipment inspection (PSI). If there is an issue with SMDA24C-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 SMDA24C-7.TBT part is unused and in its original packaging.
Return procedure for SMDA24C-7.TBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDA24C-7.TBT 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 …
