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onsemi SL15T3
- Part No.:
- SL15T3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SL15T3.pdf
- Description:
- TVS DIODE 15VWM 30VC SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,830
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Product details
Overview
SL15T3 from onsemi is a unidirectional transient voltage suppression (TVS) diode designed for high-speed I/O line protection in communication systems and computer peripherals. It delivers 300 W peak power rating (8 × 20 µs), <5 pF typical junction capacitance at 1 MHz, 15 V working peak reverse voltage (VRWM), and clamps transients to 24 V at 5 A IPP. Its integrated compensating diode architecture enables low-capacitance ESD protection compliant with IEC 61000-4-2 Level 4 (±8 kV contact).
For engineers reviewing the SL15T3 datasheet, pinout, applications, or equivalent options, this page provides verified electrical parameters, SOT-23 package mapping, bi-directional implementation guidance, and real-world interface protection use cases - all confirmed against onsemi's SL05T1 Series Rev. 6 datasheet.
Technical Context
The SL15T3 implements a series-connected TVS + compensating diode topology that reduces effective junction capacitance by leveraging series capacitance cancellation (1/CT = 1/CTVS + 1/Ccomp). This architecture maintains unidirectional conduction while achieving sub-5 pF performance critical for USB 2.0, HDMI, and Ethernet PHY interfaces.
It operates as a clamping device: under overvoltage, the TVS enters avalanche breakdown while the compensating diode remains forward-biased, shunting surge current to ground. Bi-directional protection requires two SL15T3 units in inverse-parallel configuration per I/O line, as no internal bidirectional structure is present.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Power Rating | 300 W (8 × 20 µs pulse); sustains single-event lightning surges without failure in telecom/data line applications |
| Working Peak Reverse Voltage (VRWM) | 15 V; sets maximum continuous DC or AC signal swing before leakage exceeds 1 µA |
| Clamping Voltage (VC) | 24 V @ 5 A IPP; limits transient voltage seen by downstream ICs during ESD or EFT events |
| Junction Capacitance | 3.5 pF typical @ 0 V, 1 MHz; preserves signal integrity on >100 Mbps differential lines (e.g., USB 2.0) |
| ESD Compliance | IEC 61000-4-2 Level 4 (±8 kV contact); certified for end-equipment immunity testing |
| Package | SOT-23 (TO-236, Case 318, Style 26); surface-mount compatible with automated assembly and 0.65 mm pitch PCBs |
Pinout & Package
SOT-23 package (Case 318, Style 26) with 3 terminals: Pin 1 = Cathode, Pin 2 = Anode, Pin 3 = No Connection (NC). Designed for high-density layouts and Pb-free reflow soldering (260°C/10 s).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to protected line; reverse-biased during normal operation; conducts avalanche current during overvoltage |
| 2 | Anode | Connected to system ground; completes clamping path during transient events |
| 3 | No Connection | Internally isolated; must remain unconnected on PCB to avoid parasitic coupling or reliability risk |
Key Features
| Feature | Design Value |
|---|---|
| Series-compensated TVS topology | Reduces effective capacitance to 3.5 pF - enabling use on USB 2.0, SATA, and LVDS interfaces without signal degradation |
| Unidirectional clamping action | Protects positive-going transients only; requires inverse-parallel pairing for full bi-directional line coverage |
| UL 94 V-0 flammability rating | Meets safety standards for enclosure-integrated protection in consumer and industrial end equipment |
| Pb-free SOT-23 packaging | Complies with RoHS Directive 2011/65/EU and supports lead-free reflow profiles up to 260°C |
Applications
| USB 2.0 Data Lines | Ethernet PHY Interfaces |
|---|---|
|
Use Scenario: Protecting D+ and D− pins of USB 2.0 transceivers from ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between connector and PHY IC input pins. Use Value: 3.5 pF capacitance avoids signal rise-time degradation; 24 V clamping prevents PHY latch-up or damage. |
Use Scenario: Shielding 10/100BASE-TX transformer-coupled PHY inputs from lightning-induced surges on RJ-45 ports. IC Role / Device Role / Timing Role: Transient suppressor mounted at transformer secondary side, referenced to PHY ground. Use Value: 300 W peak power rating handles IEC 61000-4-5 12 A surge; SOT-23 footprint fits tight board spacing near magnetics. |
| Industrial Serial Port (RS-232/485) | Computer Peripheral I/O (HDMI DDC) |
|
Use Scenario: Safeguarding RS-485 transceiver A/B lines in factory automation controllers exposed to motor-switching noise. IC Role / Device Role / Timing Role: Paired SL15T3 devices in inverse-parallel configuration per differential pair. Use Value: Enables bi-directional clamping without increasing capacitance beyond 7 pF total; maintains >250 kbps data integrity. |
Use Scenario: Securing HDMI DDC (I²C) clock and data lines against ESD during cable mating in AV receivers and monitors. IC Role / Device Role / Timing Role: Single SL15T3 per line (cathode to signal, anode to ground), leveraging low-leakage design. Use Value: 1 µA max IR at 15 V VRWM prevents I²C bus pull-up loading; 3.5 pF avoids timing skew on 100 kHz DDC clock. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A | Higher capacitance (15 pF), higher clamping voltage (24.4 V @ 5 A), DO-214AC package | Less suitable for >50 Mbps interfaces; better for lower-speed industrial analog lines | Select when board space allows larger SMA package and signal bandwidth is ≤10 Mbps |
| TPD2E001DRYR | 2-channel array, 3.5 pF/channel, 15 V VRWM, but rated only for 120 W peak power | Integrated dual-channel saves layout area but lacks SL15T3's 300 W surge margin | Prefer for compact dual-line protection where 120 W surge capability suffices (e.g., portable device USB ports) |
Compared with SMAJ15A and TPD2E001DRYR, the SL15T3 uniquely balances 300 W surge robustness, 3.5 pF capacitance, and SOT-23 scalability - making it optimal for high-reliability, high-speed wired interfaces where both ESD immunity and signal fidelity are critical.
Availability
SL15T3 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, Ethernet PHY surge suppression, and industrial RS-485 port hardening requiring stable component supply across production lifecycles.
Supply support for SL15T3 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 specializing in energy-efficient power management, analog, sensors, and logic solutions for automotive, industrial, and computing markets.
The SL15T3 belongs to the SL05T1 Series of low-capacitance TVS diodes engineered specifically for high-speed digital interface protection - prioritizing ESD immunity without compromising signal integrity.
FAQ
What is the maximum clamping voltage of the SL15T3 at 5 A peak pulse current?
The SL15T3 clamps to a maximum of 24 V at 5 A peak pulse current (IPP), as specified in the "Electrical Characteristics" table of the SL05T1 Series datasheet Rev. 6. This value ensures downstream components like USB transceivers or Ethernet PHYs remain within safe operating voltage limits during transient events. The SL15T3 achieves this clamping performance while maintaining only 3.5 pF capacitance - a key differentiator versus conventional TVS diodes.
Can the SL15T3 be used for bi-directional line protection without external components?
No, the SL15T3 is a unidirectional TVS diode and cannot provide bi-directional protection alone. Per the datasheet's Application Background section, bi-directional protection requires two SL15T3 devices connected in inverse-parallel configuration - one with cathode toward the line, the other with anode toward the line. This arrangement enables clamping of both positive and negative transients while preserving low capacitance.
What is the meaning of "Pin 3 = NC" in the SL15T3 pinout?
Pin 3 of the SL15T3 is designated "No Connection" (NC) - it is internally unconnected and must remain unattached on the PCB. Routing or soldering to Pin 3 introduces parasitic capacitance and potential reliability risks. The SL15T3's functional terminals are strictly Pin 1 (Cathode) and Pin 2 (Anode); Pin 3 exists solely for mechanical symmetry in the SOT-23 package and has no electrical role in the SL15T3 circuit operation.
Does the SL15T3 meet IEC 61000-4-5 lightning surge requirements?
Yes, the SL15T3 is rated for IEC 61000-4-5 lightning surge immunity with a 12 A peak current (open-circuit voltage 1 kV, source impedance 2 Ω), as stated in the "Maximum Ratings" table. Its 300 W peak power rating (8 × 20 µs) directly supports this level of surge handling. When implemented with proper PCB layout - short traces, ground plane, and minimal loop area - the SL15T3 satisfies system-level lightning protection requirements for industrial Ethernet and serial interfaces.
Is the SL15T3 compatible with Pb-free reflow soldering processes?
Yes, the SL15T3 is offered in a Pb-free SOT-23 package qualified for standard lead-free reflow profiles. The datasheet specifies a maximum lead solder temperature of 260°C for 10 seconds - fully aligned with IPC/JEDEC J-STD-020 moisture sensitivity and reflow guidelines. Its corrosion-resistant finish and void-free molded case ensure reliable wetting and joint integrity during automated assembly.
SL15T3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 30V
- 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)
SL15T3 FAQ
1.How can I place an order for SL15T3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SL15T3 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 SL15T3 reliable?
The price and inventory of SL15T3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SL15T3 is usually 5 days.
3.What payment methods are accepted for SL15T3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SL15T3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SL15T3?
SL15T3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SL15T3 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 SL15T3?
For technical support, including SL15T3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SL15T3 requirements.
6.How does Aetrix verify that SL15T3 is sourced from the original manufacturer or authorized distributors?
All SL15T3 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 SL15T3 meets industry standards.
7.What is the process for return or replacement of SL15T3?
All SL15T3 units undergo pre-shipment inspection (PSI). If there is an issue with SL15T3, 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 SL15T3 part is unused and in its original packaging.
Return procedure for SL15T3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SL15T3 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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