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Semtech Corporation SX1230SKB915

Name: SX1230SKB915
Brand: Semtech Corporation
SKU: SX1230SKB915
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SX1230SKB915

Manufacturer:: Semtech Corporation

Category:: RF, RFID, Wireless Evaluation Boards

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Datasheet:: SX1230SKB915.pdf

Description:: SX1230SKB915 EVALUATION KIT

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Product details

Overview

SX1230SKB915 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, 20mΩ dynamic resistance, and 175pF junction capacitance - deployed in USB PD and industrial load switch input protection.

For engineers reviewing the SX1230SKB915 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, temperature-stable clamping behavior, and direct alternatives for 22V bus protection in high-reliability embedded and USB Type-C systems.

Technical Context

The SX1230SKB915 uses 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 across 24–40A IPP due to decreasing R_DS(on) under surge conditions.

It operates over –40°C to +125°C with stable 27.5–28V clamping at 40A (1.2/50μs + 8/20μs combination waveform, R_S = 2Ω), 22V reverse stand-off voltage, and <600nA leakage at VRWM - enabling robust protection without thermal derating penalties seen in junction-based TVS devices.

Key Specifications

Parameter	Value and Actual Design Meaning
Reverse Stand-Off Voltage	22 V - defines maximum continuous operating voltage before conduction begins; matches USB PD 20V nominal + margin.
Clamping Voltage (40A)	27.5–28 V - limits transient voltage seen by downstream ICs (e.g., USB PD controllers) during 8/20μs surges, staying below 30V damage thresholds.
Peak Pulse Current	40 A (8/20μs) - supports IEC 61000-4-5 Level 4 industrial surge immunity (±1kV, R_S = 42Ω) with headroom.
ESD Withstand	±30 kV contact & air (IEC 61000-4-2) - exceeds Level 4 requirements, eliminating need for cascaded ESD stages.
Dynamic Resistance	20 mΩ - ensures minimal voltage rise under high di/dt transients, critical for low-voltage tolerance in modern power rails.
Junction Capacitance	175 pF @ 22V, 1MHz - compatible with DC/low-speed power line protection; not suitable for >100MHz signal lines.

Pinout & Package

Package: DFN 1.6 mm × 1.6 mm × 0.55 mm, 6-lead, RoHS-compliant, UL 94V-0 molding compound, exposed pad not present.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3	GND	Common ground return for surge current; all three pins must be connected to maximize current sharing and minimize parasitic inductance.
4, 5, 6	IN	Protected line input (e.g., VBUS, load switch input); parallel connection required to achieve full 40A rating and uniform current distribution.

Key Features

Feature	Design Value
Constant-clamp architecture	Clamping voltage varies ≤0.5 V across 24–40A IPP range - eliminates design uncertainty from TVS voltage drift with current/temperature.
Temperature-stable protection	Clamping remains ~27.5–28 V from –40°C to +125°C - enables reliable operation in uncontrolled industrial environments without derating.
Low dynamic resistance	20 mΩ measured between 1A–40A - reduces IR drop during surge, preserving voltage margin for sensitive downstream FETs or controllers.
High-energy EOS handling	1120 W peak pulse power (8/20μs) - sustains multi-millisecond transients common in lightning-induced surges on long cables or industrial buses.

Applications

USB Type-C Power Delivery Protection	Industrial Load Switch Input Protection
Use Scenario: Protecting VBUS lines in USB Type-C ports supporting up to 20V/5A PD negotiation, exposed to ESD and cable-borne surges. IC Role / Device Role / Timing Role: Primary EOS shunt protector placed directly at connector, diverting transients before they reach PD controller or load switch. Use Value: Maintains clamping at ≤28 V across temperature and current - prevents latch-up or gate oxide damage in 20V-tolerant PD ICs like STUSB4500 or TUSB7320.	Use Scenario: Safeguarding input terminals of industrial-grade load switches (e.g., HS2950P, TPS22990) against lightning-induced surges in remote meters or robotics. IC Role / Device Role / Timing Role: Front-end transient suppressor on VIN rail, limiting voltage stress on internal MOSFETs during 1.2/50μs + 8/20μs combo-wave events. Use Value: Keeps clamped voltage below 30 V - avoids overvoltage failure of integrated FETs rated for 30V max V_DS, extending device lifetime in harsh environments.
IoT Edge Node Power Bus Protection	Storage Device 22V Rail Protection
Use Scenario: Securing 22V auxiliary rails in battery-backed IoT gateways or edge AI nodes subject to EFT bursts and connector hot-plug transients. IC Role / Device Role / Timing Role: Single-device solution for both ESD (±30kV) and surge (40A) on main power input, replacing dual-stage TVS + MOV designs. Use Value: 175 pF capacitance avoids signal integrity issues on DC rails while delivering 4× higher peak current than typical 22V TVS diodes (e.g., SMAJ22A).	Use Scenario: Protecting 22V supply inputs in NVMe SSD enclosures or enterprise HDD backplanes exposed to system-level ESD and board-level surges. IC Role / Device Role / Timing Role: High-reliability clamp on storage controller power domain, ensuring uninterrupted operation during field service or rack insertion events. Use Value: Stable 27.5–28 V clamping at 125°C - guarantees protection margin remains intact even under sustained thermal stress in dense storage arrays.

USB Type-C Power Delivery Protection

Industrial Load Switch Input Protection

Use Scenario: Protecting VBUS lines in USB Type-C ports supporting up to 20V/5A PD negotiation, exposed to ESD and cable-borne surges.

IC Role / Device Role / Timing Role: Primary EOS shunt protector placed directly at connector, diverting transients before they reach PD controller or load switch.

Use Value: Maintains clamping at ≤28 V across temperature and current - prevents latch-up or gate oxide damage in 20V-tolerant PD ICs like STUSB4500 or TUSB7320.

Use Scenario: Safeguarding input terminals of industrial-grade load switches (e.g., HS2950P, TPS22990) against lightning-induced surges in remote meters or robotics.

IC Role / Device Role / Timing Role: Front-end transient suppressor on VIN rail, limiting voltage stress on internal MOSFETs during 1.2/50μs + 8/20μs combo-wave events.

Use Value: Keeps clamped voltage below 30 V - avoids overvoltage failure of integrated FETs rated for 30V max V_DS, extending device lifetime in harsh environments.

IoT Edge Node Power Bus Protection

Storage Device 22V Rail Protection

Use Scenario: Securing 22V auxiliary rails in battery-backed IoT gateways or edge AI nodes subject to EFT bursts and connector hot-plug transients.

IC Role / Device Role / Timing Role: Single-device solution for both ESD (±30kV) and surge (40A) on main power input, replacing dual-stage TVS + MOV designs.

Use Value: 175 pF capacitance avoids signal integrity issues on DC rails while delivering 4× higher peak current than typical 22V TVS diodes (e.g., SMAJ22A).

Use Scenario: Protecting 22V supply inputs in NVMe SSD enclosures or enterprise HDD backplanes exposed to system-level ESD and board-level surges.

IC Role / Device Role / Timing Role: High-reliability clamp on storage controller power domain, ensuring uninterrupted operation during field service or rack insertion events.

Use Value: Stable 27.5–28 V clamping at 125°C - guarantees protection margin remains intact even under sustained thermal stress in dense storage arrays.

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), same tape-and-reel packaging (3,000/reel).	No functional difference; used interchangeably in production - differs only in suffix notation per Semtech's ordering convention.	Select TDS2211P.C when sourcing from authorized distributors requiring exact orderable part number compliance.
SP1003-02HTG	22V stand-off, 30A IPP (8/20μs), 33V clamping at 30A, 12pF capacitance - lower clamping margin but far lower capacitance.	Better suited for high-speed data lines (e.g., CC/SBU) where capacitance matters; insufficient for 40A surge immunity on power rails.	Choose SP1003-02HTG only for low-capacitance auxiliary signal protection - not a replacement for SX1230SKB915 on VBUS or load switch inputs.

Compared with TDS2211P.C (identical function) and SP1003-02HTG (lower IPP, lower C_J), the SX1230SKB915 delivers optimal balance of high-current surge handling, tight clamping, and temperature stability for 22V power-line protection - making it the preferred choice where 40A capability and <28V clamping are mandatory.

Availability

SX1230SKB915 is available at Aetrix Electronics and suitable for USB Type-C PD implementations, industrial load switch protection, and IoT edge node power bus designs requiring stable component supply with guaranteed long-term lifecycle support.

Supply support for SX1230SKB915 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, and sensing applications.

The SX1230SKB915 belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability 22V power-rail protection where stable clamping and temperature insensitivity are critical.

FAQ

What is the primary protection function of the SX1230SKB915?

The SX1230SKB915 functions as a Transient Diverting Suppressor (TDS) that shunts high-energy EOS events - including ESD (±30kV), EFT (±4kV), and surge (40A, 8/20μs) - away from sensitive downstream components. Its FET-based architecture provides near-constant clamping voltage, distinguishing it from traditional TVS diodes whose clamping rises with current and temperature. The SX1230SKB915 is specifically optimized for 22V power-line protection.

Does the SX1230SKB915 require external biasing or control signals?

No, the SX1230SKB915 operates autonomously without external bias, enable pins, or configuration interfaces. It relies on an integrated precision trigger circuit that activates the internal shunt FET when transient voltage exceeds its breakdown threshold. This self-contained operation makes the SX1230SKB915 ideal for space-constrained and low-complexity protection schemes where passive placement is required - no firmware or layout overhead is needed for the SX1230SKB915 to perform.

Can the SX1230SKB915 be used on high-speed data lines such as USB SuperSpeed or PCIe?

No, the SX1230SKB915 is not suitable for high-speed data lines due to its 175pF junction capacitance, which would severely degrade signal integrity above ~10 MHz. It is explicitly designed for DC or low-frequency power and control lines (e.g., VBUS, CC, SBU, load switch inputs). For USB SuperSpeed lanes, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25pF); the SX1230SKB915 must be applied only where capacitance is non-critical - its role is strictly power-rail protection.

How does the SX1230SKB915's clamping performance compare to standard TVS diodes at elevated temperatures?

Unlike standard TVS diodes - whose clamping voltage increases significantly with temperature due to rising dynamic resistance - the SX1230SKB915 maintains a stable 27.5–28V clamping voltage from –40°C to +125°C. This stability arises from its FET-based shunt mechanism, where R_DS(on) decreases under surge, counteracting thermal effects. At 125°C, a typical 22V TVS may clamp above 38V at 24A, whereas the SX1230SKB915 remains within specification - a key advantage for automotive under-hood or industrial ambient deployments.

What PCB layout practices are essential for optimal performance of the SX1230SKB915?

To achieve rated 40A surge performance, all three GND pins (1, 2, 3) and all three IN pins (4, 5, 6) must be shorted together respectively using low-inductance traces - no daisy-chaining. Place the SX1230SKB915 within 5 mm of the protected connector, use multiple vias (≥4) to connect GND pins to an inner ground plane, and avoid routing other signals beneath the device. These practices minimize parasitic inductance, ensuring fast turn-on and full current sharing - deviations directly reduce effective IPP and increase clamping voltage.

SX1230SKB915 Specifications

Product attributes: Attribute value

Manufacturer:: Semtech Corporation

Series:: -

Packaging:: Bulk

Product Status:: Active

Type:: Transmitter

Frequency:: 915MHz

Contents:: Board(s)

Utilized IC / Part:: SX1230

SX1230SKB915 FAQ

1.How can I place an order for SX1230SKB915 through Aetrix?

Please submit a Request for Quotation (RFQ) for SX1230SKB915 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 SX1230SKB915 reliable?

The price and inventory of SX1230SKB915 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SX1230SKB915 is usually 5 days.

3.What payment methods are accepted for SX1230SKB915?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SX1230SKB915 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SX1230SKB915?

SX1230SKB915 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SX1230SKB915 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 SX1230SKB915?

For technical support, including SX1230SKB915 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SX1230SKB915 requirements.

6.How does Aetrix verify that SX1230SKB915 is sourced from the original manufacturer or authorized distributors?

All SX1230SKB915 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 SX1230SKB915 meets industry standards.

7.What is the process for return or replacement of SX1230SKB915?

All SX1230SKB915 units undergo pre-shipment inspection (PSI). If there is an issue with SX1230SKB915, 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 SX1230SKB915 part is unused and in its original packaging.

Return procedure for SX1230SKB915:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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