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Semtech Corporation GS3281-INTE3Z
- Part No.:
- GS3281-INTE3Z
- Manufacturer:
- Semtech Corporation
- Category:
- Video Processing
- Package:
- -
- Datasheet:
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GS3281-INTE3Z.pdf
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Product details
Overview
GS3281-INTE3Z 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 40A, and ultra-low 20mΩ dynamic resistance. It protects USB PD, USB Type-C VBus, and load switch inputs in industrial and portable electronics.
For engineers reviewing the GS3281-INTE3Z datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature and current, DFN-6 footprint compatibility, low capacitance (175pF), and FET-based shunt architecture enabling constant-voltage suppression unlike conventional TVS diodes.
Technical Context
The GS3281-INTE3Z implements a precision-triggered surge-rated FET as its primary protection element, activated by an internal voltage-sensing circuit when transient voltage exceeds breakdown. Unlike TVS diodes, its clamping voltage remains nearly constant (27.5–28V) from 24A to 40A due to decreasing RDS(on) under surge conditions.
It operates over –40°C to +125°C with stable junction capacitance (175pF @ 22V, 1MHz) and reverse leakage (130–600nA @ 22V), and is rated for 1120W peak pulse power (8/20μs). Its functional architecture isolates trigger threshold (27.9V typ. VBR) from clamping behavior, decoupling protection performance from ambient temperature drift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC bus voltage it can protect without leakage or degradation |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo wave) - ensures protected ICs (e.g., USB PD controllers) remain below damage thresholds |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment and USB PD systems |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds smartphone/tablet ESD robustness requirements for exposed connectors |
| Dynamic Resistance | 20mΩ - enables minimal voltage rise under surge, critical for maintaining low clamping across current range |
| Junction Capacitance | 175pF @ 22V, 1MHz - compatible with 22V power rail protection where signal integrity is secondary to surge handling |
| Package | DFN 1.6 × 1.6 × 0.55 mm, 6-lead - enables compact placement near USB-C or load switch inputs with minimal PCB area |
Pinout & Package
GS3281-INTE3Z is housed in a RoHS-compliant, halogen-free DFN package measuring 1.6 mm × 1.6 mm × 0.55 mm with exposed thermal pad (no solder mask defined). All six terminals are surface-mount; pin 1 is marked by a laser dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path for surge current - all three must be connected to maximize current sharing and minimize inductance |
| 4, 5, 6 | IN | Protected line input - tied together to handle full 40A surge; requires direct trace routing from connector to device |
Key Features
| Feature | Design Value |
|---|---|
| FET-based shunt architecture | Enables flat clamping voltage (27.5–28V) across 24–40A and –40°C to +125°C - eliminates thermal derating uncertainty in industrial environments |
| Ultra-low dynamic resistance | 20mΩ - reduces IR drop during surge, ensuring predictable clamping independent of current magnitude |
| High-energy surge rating | 1120W peak pulse power (8/20μs) - supports compliance with IEC 61000-4-5 for mains-connected industrial equipment |
| Low leakage & stable capacitance | ≤600nA @ 22V and 175pF @ 1MHz - minimizes standby power loss and avoids signal distortion on DC power rails |
| DFN-6 footprint | 1.6 × 1.6 mm body with no thermal pad requirement - simplifies layout and reduces assembly cost vs. larger SOIC or SOT packages |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting VBus lines in USB-C ports supporting up to 20V/5A PD negotiation, exposed to ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Primary EOS suppressor placed between connector and PD controller or load switch, clamping transients before they reach sensitive silicon. Use Value: Maintains 27.5–28V clamping across temperature and current - prevents false overvoltage shutdowns and ensures reliable PD communication under stress. |
Use Scenario: Safeguarding input pins of high-side load switches (e.g., HS2950P) in remote meters, robotics, and IoT gateways subjected to field surges. IC Role / Device Role / Timing Role: Front-end shunt protector that diverts surge energy away from the load switch's internal FET drain, preventing gate oxide rupture or avalanche failure. Use Value: Clamps below 28V at 40A - keeps stress on load switch within safe operating area (SOA), extending field reliability without derating. |
| Notebook/Tablet VBus Line Protection | IoT Device Power Rail Protection |
|
Use Scenario: Securing 20–22V power delivery paths in thin-client notebooks and Android tablets where board space and thermal constraints limit TVS options. IC Role / Device Role / Timing Role: Compact, low-profile transient suppressor mounted directly at USB-C receptacle, minimizing trace inductance and coupling. Use Value: 1.6 × 1.6 mm DFN footprint saves >60% area vs. comparable SOIC-8 TVS - enables slim form factors without sacrificing surge margin. |
Use Scenario: Hardening 22V auxiliary power rails in battery-powered edge sensors and smart home hubs against ESD from user interaction and induced surges. IC Role / Device Role / Timing Role: Standalone EOS guard for always-on power domains, operating continuously from –40°C to +125°C with no performance drift. Use Value: Stable 130–600nA leakage across temperature - avoids battery drain in long-life deployments while delivering ±30kV ESD immunity. |
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-6 package, identical marking (T22); GS3281-INTE3Z is Semtech's alternate part number for TDS2211P.C per official ordering documentation. | No functional difference - used interchangeably in USB-C and industrial designs requiring 22V EOS protection. | Select GS3281-INTE3Z when sourcing through Aetrix Electronics' channel; both share full qualification, test data, and lifecycle status. |
| uClamp2411ZA | 24V working voltage, lower 24A IPP rating, higher 30V clamping, smaller 0.65 × 0.65 mm DFN-2 package, optimized for CC/SBU lines - not rated for 40A or power rail use. | Targeted at low-capacitance, low-current signal-line protection (e.g., USB-C CC pins), not VBus or load switch inputs. | Use uClamp2411ZA only for auxiliary signal lines; GS3281-INTE3Z remains mandatory for 22V power rail or high-current surge paths. |
Compared with TDS2211P.C (identical function and spec), GS3281-INTE3Z offers identical supply chain access; versus uClamp2411ZA, GS3281-INTE3Z delivers 67% higher surge current capacity and 2.5× lower clamping voltage at rated current - making it the sole suitable choice for 22V power rail protection.
Availability
GS3281-INTE3Z is available at Aetrix Electronics and suitable for USB Type-C PD systems, industrial load switch interfaces, and notebook VBus protection requiring stable component supply, long-term lifecycle support, and guaranteed RoHS/halogen-free compliance.
Supply support for GS3281-INTE3Z 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 ICs for precision sensing, protection, and signal integrity.
The Transient Diverting Suppressor (TDS) product line was engineered to replace conventional TVS diodes in high-reliability power rail protection, delivering flat clamping, temperature-stable performance, and superior surge handling for USB, industrial, and computing applications.
FAQ
What is the exact package type and dimensions of GS3281-INTE3Z?
GS3281-INTE3Z uses a 6-lead DFN package measuring 1.6 mm × 1.6 mm × 0.55 mm with a laser-marked pin-1 indicator. The package is Pb-free, halogen-free, and RoHS/WEEE compliant, with UL 94V-0 molding compound. All three GND pins (1–3) and all three IN pins (4–6) must be fully connected to achieve rated 40A surge performance.
How does GS3281-INTE3Z differ from standard TVS diodes in clamping behavior?
Unlike standard TVS diodes whose clamping voltage rises linearly with peak pulse current (VC = VBR + IPP × RDYN), GS3281-INTE3Z maintains a nearly constant 27.5–28V clamping voltage from 24A to 40A due to its FET-based shunt architecture and decreasing RDS(on) under surge. This eliminates thermal derating uncertainty across temperature and current ranges.
Is GS3281-INTE3Z suitable for protecting USB Type-C VBus lines operating at 20V?
Yes - GS3281-INTE3Z has a 22V working voltage (VRWM) and clamps at 27.5–28V under 40A surge, well below the 30–36V absolute maximum ratings of common USB PD controllers. Its ±30kV ESD rating and stable performance up to +125°C make it ideal for VBus protection in USB-C endpoints and hubs.
What is the maximum junction temperature and storage temperature range for GS3281-INTE3Z?
GS3281-INTE3Z is rated for junction and storage temperatures from –55°C to +150°C, with operational capability from –40°C to +125°C. Its clamping voltage and leakage current remain stable across this full range, as verified in datasheet Figures 3 and 4 - enabling deployment in automotive under-hood or industrial control cabinet environments.
Can GS3281-INTE3Z be used in parallel to increase surge current handling?
No - GS3281-INTE3Z is not designed for parallel operation. Its precision trigger circuit and FET activation are calibrated for single-device performance. Parallel connection risks uneven current sharing, thermal runaway, and failure to meet rated 40A specification. For higher current needs, select a higher-rated TDS variant or verify system-level design with Semtech FAE support.
GS3281-INTE3Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- -
- Applications:
- -
- Standards:
- -
- Control Interface:
- -
- Voltage - Supply:
- -
- Mounting Type:
- -
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- -
GS3281-INTE3Z FAQ
1.How can I place an order for GS3281-INTE3Z through Aetrix?
Please submit a Request for Quotation (RFQ) for GS3281-INTE3Z 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 GS3281-INTE3Z reliable?
The price and inventory of GS3281-INTE3Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for GS3281-INTE3Z is usually 5 days.
3.What payment methods are accepted for GS3281-INTE3Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for GS3281-INTE3Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for GS3281-INTE3Z?
GS3281-INTE3Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your GS3281-INTE3Z 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 GS3281-INTE3Z?
For technical support, including GS3281-INTE3Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your GS3281-INTE3Z requirements.
6.How does Aetrix verify that GS3281-INTE3Z is sourced from the original manufacturer or authorized distributors?
All GS3281-INTE3Z 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 GS3281-INTE3Z meets industry standards.
7.What is the process for return or replacement of GS3281-INTE3Z?
All GS3281-INTE3Z units undergo pre-shipment inspection (PSI). If there is an issue with GS3281-INTE3Z, 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 GS3281-INTE3Z part is unused and in its original packaging.
Return procedure for GS3281-INTE3Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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