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onsemi SL24T1
- Part No.:
- SL24T1
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- -
- Datasheet:
-
SL24T1.pdf
- Description:
- TVS LO CAP 300W 24V ESD SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:9,813
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Product details
Overview
SL24T1G from onsemi is a unidirectional ESD protection diode in the SL05T1G series, designed for high-speed I/O line protection with 5.0 pF typical junction capacitance at 1 MHz, 24 V working peak reverse voltage (VRWM), and 55 V clamping voltage (VC) at 5 A peak pulse current. It delivers 300 W peak power dissipation per 8 × 20 µs transient and meets IEC 61000−4−2 Level 4 (±8 kV contact), used in USB 2.0, HDMI, and Ethernet PHY interfaces.
For engineers reviewing the SL24T1G datasheet, pinout, applications, or equivalent options, key selection criteria include low-capacitance transient suppression for signal integrity preservation, unidirectional clamping behavior, SOT−23 package compatibility with automated assembly, and compliance with IEC 61000−4−2/−4/−5 surge standards.
Technical Context
The SL24T1G integrates a surge protection diode in series with a compensating diode to achieve sub-5 pF capacitance-leveraging series capacitance reduction (1/CT = 1/C₁ + 1/C₂). This architecture enables effective ESD suppression without degrading high-frequency signal integrity on data lines up to 480 Mbps.
It operates as a unidirectional TVS device: reverse-biased during overvoltage events to clamp at 55 V (VC @ 5 A), while the series-compensated structure maintains low leakage (<1.0 µA @ VRWM) and stable breakdown (26.7–29 V @ 1 mA). Thermal resistance is 556 °C/W on FR-5 board.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 24 V - Maximum continuous reverse operating voltage before conduction begins; sets safe I/O line bias margin. |
| VC @ 5 A | 55 V - Clamping voltage under 5 A 8×20 µs surge; limits downstream IC stress during lightning transients. |
| CJ @ 0 V, 1 MHz | 5.0 pF - Junction capacitance at zero bias; preserves signal rise time and eye diagram integrity on USB/HDMI lines. |
| IPP Max | 17 A - Peak pulse current handling capability; supports IEC 61000−4−5 12 A lightning surge with margin. |
| Ppk | 300 W - Non-repetitive peak power rating; defines single-event energy absorption capacity. |
| VBR @ 1 mA | 26.7–29 V - Breakdown voltage range; ensures predictable turn-on threshold across temperature and process variation. |
| IEC 61000−4−2 | ±8 kV contact discharge - Certified ESD immunity level; qualifies for industrial and consumer end-equipment compliance testing. |
Pinout & Package
SOT−23 (TO−236), Case 318, Style 26 - surface-mount plastic package optimized for high-density PCB layout and reflow soldering; void-free molding, UL 94 V−0 rated, 260°C max solder temperature for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connects to protected I/O line; forward-biased during normal operation; blocks reverse surge current until clamping threshold reached. |
| 2 | Cathode | Connected to system ground; provides low-impedance path for transient current during clamping event. |
| 3 | No Connect (NC) | Internally isolated terminal; no electrical function; must remain unconnected on PCB to avoid parasitic coupling or reliability risk. |
Key Features
| Feature | Design Value |
|---|---|
| Series-compensated diode architecture | Reduces effective junction capacitance to 5.0 pF-enabling use on 480 Mbps USB 2.0 differential pairs without signal degradation. |
| Unidirectional clamping | Clamps only negative transients relative to ground; preserves DC bias on positive-rail I/O lines such as HDMI TMDS channels. |
| IEC 61000−4−2/−4/−5 compliance | Validated for full-system ESD/EFT/lightning immunity testing-reduces pre-compliance debug cycles in end-product certification. |
| SOT−23 footprint | Enables drop-in placement in existing high-speed layouts; compatible with standard pick-and-place equipment and IPC-A-610 Class 2/3 assembly. |
| Pb-free, RoHS-compliant | Meets global environmental regulations and eliminates lead contamination risk in mixed-technology assemblies. |
Applications
| USB 2.0 Data Lines | HDMI TMDS Channels |
|---|---|
Use Scenario: Protecting D+ and D− differential pairs in USB 2.0 host/device ports against ESD events during cable insertion or handling. IC Role / Device Role / Timing Role: Unidirectional transient voltage suppressor placed between I/O pin and ground, with NC pin unused. Use Value: 5.0 pF capacitance prevents signal integrity loss at 480 Mbps; ±8 kV IEC 61000−4−2 contact rating ensures robustness in consumer-facing ports. | Use Scenario: Safeguarding HDMI TMDS clock and data channels from electrostatic discharge during hot-plug events. IC Role / Device Role / Timing Role: Ground-referenced clamping diode on each TMDS line, leveraging unidirectional behavior to avoid interfering with positive DC bias. Use Value: Low 5.0 pF capacitance maintains >1 GHz bandwidth; 55 V clamping protects 3.3 V receiver inputs from damage during 15 kV air discharge. |
| Ethernet PHY Interfaces | Industrial Serial I/O (RS-485) |
Use Scenario: Transient suppression on 10/100BASE-TX MDI differential pairs exposed to field-induced surges in office environments. IC Role / Device Role / Timing Role: Line-to-ground TVS on each TX+/TX− and RX+/RX− pair, using two SL24T1G devices per pair for bidirectional coverage. Use Value: 300 W peak power rating handles 8×20 µs surges per IEC 61000−4−5; 24 V VRWM aligns with PHY common-mode voltage range. | Use Scenario: Protecting RS-485 transceiver A/B pins in factory automation nodes subject to long-cable ESD coupling. IC Role / Device Role / Timing Role: Unidirectional clamping diode from A/B to ground, configured with external steering diode for bidirectional operation if required. Use Value: 26.7–29 V VBR ensures reliable turn-on before transceiver damage threshold; SOT−23 size allows placement within tight connector zones. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SL15T1G | Lower VRWM (15 V), lower VC (30 V @ 5 A), same 5.0 pF capacitance and SOT−23 package. | Better suited for 3.3 V or 5 V logic rails where tighter clamping margin is required. | Select SL15T1G when protecting 3.3 V I/O with stricter voltage headroom; SL24T1G remains optimal for 24 V nominal bus or higher-voltage PHY interfaces. |
| TPD2E001DRYR | Bi-directional, 1.5 pF capacitance, 5 V VRWM, 12 V VC @ 1 A, same SOT−23-3 package but pin 3 functional (not NC). | Designed for ultra-high-speed USB 3.0/PCIe; requires different PCB routing due to active pin 3 and bidirectional behavior. | Choose TPD2E001DRYR only for sub-5 pF, bidirectional needs below 5 V; SL24T1G offers higher VRWM and proven robustness for industrial 24 V signal lines. |
Compared with SL15T1G and TPD2E001DRYR, SL24T1G provides the highest VRWM in its family for 24 V systems, retains the NC pin simplifying layout, and balances clamping voltage, power rating, and capacitance for cost-sensitive industrial I/O protection-without requiring redesign of ground-return paths or signal routing.
Availability
SL24T1G is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI TMDS channel safeguarding, and industrial RS-485 node hardening requiring stable component supply across production lifecycles.
Supply support for SL24T1G 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The SL05T1G series was engineered specifically for high-speed digital interface protection-prioritizing ultra-low capacitance, repeatable clamping performance, and manufacturability in automated SMT lines.
FAQ
What is the maximum working voltage supported by SL24T1G?
The SL24T1G has a working peak reverse voltage (VRWM) of 24 V, meaning it can safely operate on circuits with up to 24 V DC bias without leakage or conduction. This makes SL24T1G appropriate for 24 V industrial I/O lines, CAN FD physical layers, and certain automotive sensor interfaces where higher standoff voltage is needed compared to 5 V or 15 V variants like SL05T1G or SL15T1G.
Does SL24T1G support bidirectional ESD protection?
No, SL24T1G is a unidirectional ESD protection diode. It clamps only negative transients relative to ground. For bidirectional protection, two SL24T1G devices must be connected in inverse-parallel-one anode-to-line/cathode-to-ground, the other cathode-to-line/anode-to-ground-or paired with an external steering diode. The NC pin (pin 3) must remain unconnected in all configurations.
What is the significance of the NC pin on SL24T1G?
The NC (No Connect) pin on SL24T1G is pin 3 and is internally isolated with no electrical function. It must not be soldered or tied to any net on the PCB, as doing so may introduce parasitic coupling, reduce ESD performance, or compromise long-term reliability. This distinguishes SL24T1G from three-terminal bidirectional TVS devices where pin 3 is active.
How does SL24T1G achieve 5.0 pF capacitance?
SL24T1G achieves 5.0 pF typical junction capacitance by integrating a surge protection diode in series with a compensating diode-exploiting the series capacitance formula (1/CT = 1/C₁ + 1/C₂). This architecture reduces effective capacitance versus a single-diode TVS, enabling use on high-speed interfaces like USB 2.0 without signal distortion, while maintaining 300 W peak power rating and IEC 61000−4−2 compliance.
Is SL24T1G qualified for automotive applications?
The SL24T1G itself is not AEC-Q101 qualified; however, the SZSL24T1G variant (with SZ prefix) is AEC-Q101 qualified and PPAP capable. For automotive-grade deployment-especially in infotainment or ADAS domain controllers-engineers must specify SZSL24T1G, not SL24T1G, to meet qualification requirements. Both share identical electrical specs and SOT−23 packaging.
SL24T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- -
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- -
- Unidirectional Channels:
- -
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- -
- Voltage - Breakdown (Min):
- -
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- -
- Power Line Protection:
- -
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SL24T1 FAQ
1.How can I place an order for SL24T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SL24T1 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 SL24T1 reliable?
The price and inventory of SL24T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SL24T1 is usually 5 days.
3.What payment methods are accepted for SL24T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SL24T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SL24T1?
SL24T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SL24T1 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 SL24T1?
For technical support, including SL24T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SL24T1 requirements.
6.How does Aetrix verify that SL24T1 is sourced from the original manufacturer or authorized distributors?
All SL24T1 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 SL24T1 meets industry standards.
7.What is the process for return or replacement of SL24T1?
All SL24T1 units undergo pre-shipment inspection (PSI). If there is an issue with SL24T1, 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 SL24T1 part is unused and in its original packaging.
Return procedure for SL24T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SL24T1 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
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ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
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ESD5Z5.0T1G
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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