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onsemi SL24T1G
- Part No.:
- SL24T1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SL24T1G.pdf
- Description:
- TVS DIODE 24VWM 55VC SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:10,244
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Product details
Overview
SL24T1G from onsemi is a unidirectional ESD protection diode in SOT-23 package, featuring 24 V working peak reverse voltage (VRWM), 55 V clamping voltage (VC) at 5 A, 5.0 pF typical junction capacitance at 1 MHz, and 300 W peak pulse power rating per 8 × 20 µs waveform - designed for high-speed USB 2.0, HDMI, and Ethernet I/O line protection.
For engineers reviewing the SL24T1G datasheet, pinout, applications, or equivalent options, key selection considerations include its low-capacitance series-compensated architecture, IEC 61000−4−2 Level 4 (±8 kV contact) compliance, thermal resistance of 556 °C/W on FR-5 board, and unidirectional transient voltage suppression capability.
Technical Context
The SL24T1G implements a series-connected compensating diode architecture to reduce effective junction capacitance to ≤5.0 pF - enabling use on >480 Mbps data lines without signal integrity degradation. It operates as a unidirectional TVS device with avalanche breakdown at 26.7–29 V (VBR @ 1 mA).
Clamping occurs at 43 V (1 A) and 55 V (5 A) under standardized 8 × 20 µs surge pulses, delivering 300 W peak power dissipation. Its thermal design supports operation from −55 °C to +150 °C junction temperature with UL 94 V−0 rated thermoset plastic packaging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 24 V - maximum continuous reverse voltage before leakage exceeds 1.0 µA; sets operating margin for 24 V nominal bus lines |
| VBR (min/max) | 26.7 V / 29 V @ 1 mA - defines precise avalanche onset range for predictable clamping initiation |
| VC @ 5 A | 55 V - clamping voltage during worst-case 5 A transient; limits downstream IC stress to safe levels |
| Junction Capacitance | 5.0 pF @ 1 MHz, 0 V - enables placement on USB 2.0 (480 Mbps) and HDMI 1.4 TMDS lanes without measurable eye diagram degradation |
| Peak Pulse Power | 300 W @ 8 × 20 µs - meets IEC 61000−4−5 lightning surge immunity requirements for industrial interfaces |
| ESD Rating | ±8 kV contact / ±16 kV air per IEC 61000−4−2 Level 4 - protects against human-body-model ESD events in handheld and peripheral equipment |
| RJA (FR-5) | 556 °C/W - determines thermal derating slope (1.8 mW/°C above 25 °C) for PCB layout reliability planning |
Pinout & Package
SOT−23 (TO−236) package, void-free thermosetting plastic case, UL 94 V−0 rated, optimized for automated pick-and-place assembly and reflow soldering at 260 °C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to protected I/O line; forward-biased during normal operation; blocks reverse transients until clamping threshold exceeded |
| 2 | Cathode | Connected to system ground; provides low-impedance path for surge current during avalanche conduction |
| 3 | No Connect (NC) | Internally isolated terminal; no electrical function; must remain unconnected on PCB to avoid parasitic coupling or mechanical stress |
Key Features
| Feature | Design Value |
|---|---|
| Series-compensated diode topology | Reduces effective capacitance to ≤5.0 pF - preserves signal integrity on high-speed differential pairs without added series inductance |
| Unidirectional transient suppression | Protects only against negative transients on positive-rail I/O lines - eliminates need for steering diodes in single-polarity applications |
| IEC 61000−4−2/4−4/4−5 compliance | Validated performance across electrostatic discharge, electrical fast transients, and lightning surge test standards - reduces system-level qualification effort |
| Pb-free, Halogen-free, RoHS-compliant | Meets global environmental regulations and automotive PPAP requirements - supports supply chain sustainability and export compliance |
Applications
| USB 2.0 Data Lines | HDMI TMDS Channels |
|---|---|
Use Scenario: Protecting D+ and D− pins of USB 2.0 host/device controllers against ESD events during cable insertion or handling. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed between I/O pin and ground, with NC pin unused and Anode tied to signal line. Use Value: 5.0 pF capacitance ensures <1% signal rise-time degradation at 480 Mbps, while ±8 kV contact ESD rating prevents latch-up or gate oxide damage. | Use Scenario: Safeguarding HDMI 1.4 TMDS clock and data channels from ESD during hot-plug detection and cable mating. IC Role / Device Role / Timing Role: Per-channel transient suppressor mounted directly at HDMI connector, cathode grounded, anode connected to TMDS+ or TMDS−. Use Value: Clamping voltage ≤55 V at 5 A prevents overvoltage stress on HDMI receiver input stages while maintaining eye diagram compliance. |
| Ethernet PHY Interfaces | Industrial RS-485 Transceivers |
Use Scenario: Shielding 10/100BASE-TX MDI differential pairs from ESD and induced surges in office or factory environments. IC Role / Device Role / Timing Role: One SL24T1G per line (TX+/TX−, RX+/RX−), configured unidirectionally with cathode to chassis ground and anode to signal trace. Use Value: 300 W peak power rating withstands IEC 61000−4−5 12 A lightning surges, and 24 V VRWM matches common Ethernet bias voltage margins. | Use Scenario: Protecting half-duplex RS-485 transceiver A/B terminals in programmable logic controllers and sensor nodes exposed to field wiring transients. IC Role / Device Role / Timing Role: Bidirectional protection achieved using two SL24T1G devices in inverse-parallel configuration per line pair. Use Value: Dual-device arrangement delivers symmetrical ±24 V working voltage and ≤55 V clamping in both polarities - eliminating need for dedicated bidirectional TVS parts. |
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), higher capacitance (10 pF), same SOT-23 package and pinout | Better suited for 12–15 V logic buses (e.g., SATA, PCIe reference clocks); less margin for 24 V industrial lines | Select SL15T1G when protecting lower-voltage high-speed links where tighter clamping voltage (24 V @ 5 A) is prioritized over voltage headroom |
| TPD2E001DRYR | 2-channel, 5.5 V VRWM, 0.8 pF/channel, DRY (SOT-553) package, integrated dual-diode array | Designed for space-constrained dual-line protection (e.g., USB ID/D+/D−); not pin-compatible with SL24T1G | Choose TPD2E001DRYR for compact dual-line layouts requiring sub-1 pF capacitance, accepting reduced voltage rating and different footprint |
Compared with SL15T1G and TPD2E001DRYR, the SL24T1G provides optimal balance of 24 V operating margin, 5.0 pF capacitance, and discrete unidirectional control - making it preferred for industrial Ethernet, HDMI, and 24 V-rated USB applications where voltage headroom and signal fidelity are jointly critical.
Availability
SL24T1G is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI 1.4 TMDS channel safeguarding, and industrial RS-485 transceiver 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, high-performance silicon solutions for automotive, industrial, cloud, medical, and edge applications.
The SL24T1G belongs to the SL05T1G Series of low-capacitance ESD protection diodes - engineered specifically for high-speed digital interfaces where signal integrity and robust transient immunity must coexist.
FAQ
What is the maximum working voltage supported by the SL24T1G?
The SL24T1G has a working peak reverse voltage (VRWM) of 24 V, meaning it can continuously block up to 24 V in reverse bias without exceeding 1.0 µA leakage current. This makes SL24T1G suitable for protecting 24 V nominal industrial I/O lines, including RS-485 transceivers and 24 V-powered USB hubs, while maintaining sufficient margin below its 26.7–29 V breakdown range.
Does the SL24T1G support bidirectional ESD protection?
The SL24T1G is inherently unidirectional, but bidirectional protection can be implemented using two SL24T1G devices in inverse-parallel configuration - one with anode-to-line/cathode-to-ground and the other cathode-to-line/anode-to-ground. This arrangement delivers symmetrical ±24 V VRWM and ≤55 V clamping in both polarities, as confirmed in the onsemi application diagrams for multi-line I/O protection.
What is the typical junction capacitance of the SL24T1G and why does it matter?
The SL24T1G exhibits 5.0 pF typical junction capacitance at 1 MHz and zero bias, verified in the onsemi datasheet Figure 3. This low value is critical for high-speed interfaces: it avoids measurable rise-time degradation on USB 2.0 (480 Mbps) and HDMI 1.4 TMDS channels, preserving eye diagram opening and jitter budget - unlike higher-capacitance TVS devices that distort fast edges.
Is the SL24T1G compliant with automotive-grade reliability standards?
The SL24T1G itself is not AEC-Q101 qualified; however, the SZSL24T1G variant (with SZ prefix) is AEC-Q101 qualified and PPAP capable. Standard SL24T1G meets industrial temperature range (−55 °C to +150 °C) and UL 94 V−0 flammability requirements, but automotive deployment requires explicit use of the SZ-prefixed version as documented in the onsemi ordering information table.
How is thermal performance characterized for the SL24T1G on standard PCBs?
The SL24T1G has a thermal resistance of 556 °C/W when mounted on an FR-5 board (1.0 × 0.75 × 0.62 in.), with total power dissipation derated at 1.8 mW/°C above 25 °C ambient. This means at 75 °C board temperature, its usable power dissipation drops to 225 mW − (50 × 1.8) = 135 mW - a key constraint when sizing ground planes and copper pours for repeated surge events.
SL24T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 24V
- 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:
- -
- Capacitance @ Frequency:
- 3.5pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
SL24T1G FAQ
1.How can I place an order for SL24T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SL24T1G 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 SL24T1G reliable?
The price and inventory of SL24T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SL24T1G is usually 5 days.
3.What payment methods are accepted for SL24T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SL24T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SL24T1G?
SL24T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SL24T1G 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 SL24T1G?
For technical support, including SL24T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SL24T1G requirements.
6.How does Aetrix verify that SL24T1G is sourced from the original manufacturer or authorized distributors?
All SL24T1G 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 SL24T1G meets industry standards.
7.What is the process for return or replacement of SL24T1G?
All SL24T1G units undergo pre-shipment inspection (PSI). If there is an issue with SL24T1G, 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 SL24T1G part is unused and in its original packaging.
Return procedure for SL24T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SL24T1G Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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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
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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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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