USBLC6-2SC6Y - 2-Line 5V ESD TVS | STMicroelectronics | USB 2.0
MPN: USBLC6-2SC6Y ✓ Active| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
USBLC6-2SC6Y Overview
A TVS diode array is a circuit-protection component that diverts transient current during ESD events while presenting a low capacitance to protected data lines. The USBLC6-2SC6Y belongs to the application-specific ESD-protection category, helping protect sensitive interface ICs without substantially disturbing high-speed signal integrity. Its two protected lines make it suitable for differential pairs and selected single-ended interface signals.
The device provides 2.5 pF nominal capacitance as identified by Mouser, with additional distributor material specifying a 3.5 pF maximum line capacitance. Its leakage current is listed as 10 nA by Mouser and 150 nA maximum by another verified distributor source. These characteristics help preserve low distortion and reduce loading on battery-powered or high-impedance interfaces, although the exact operating leakage condition must be checked against the manufacturer datasheet.
The USBLC6-2SC6Y is a monolithic ESD-protection device with a typical 5.25 V reverse standoff voltage and approximately 6 V breakdown voltage in the verified cross-reference data. Its bidirectional topology supports signal lines that may see positive or negative ESD transients. The SOT-23-6 package is compact and compatible with automated surface-mount assembly, while the protected-line arrangement enables placement close to a connector or transceiver.
Typical applications include USB 2.0 data-line protection, Ethernet-link protection, video-line protection, USB peripheral power-entry protection, and other low-capacitance high-speed interfaces. Place the array close to the connector so ESD current is diverted before reaching the protected controller or transceiver. Keep routing short and preserve the intended return path to minimize parasitic inductance.
The primary design trade-off is capacitance versus protection capability: low capacitance helps maintain signal integrity, but the selected clamp and standoff ratings must be compatible with the interface voltage. Confirm footprint orientation, protected-line mapping, and the manufacturer’s application circuit before production release.
This page consolidates the verified manufacturer and distributor data, including the USBLC6-2SC6Y protection ratings, package information, application focus, and replacement analysis, into an engineering-oriented component record for design review and sourcing.
Drop-in alternatives for USBLC6-2SC6Y — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
USBLC6-2SC6
✅ Drop-In📋 Reference alternative (not in catalog)
ESDALC6V1-1U2
✅ Drop-In📋 Reference alternative (not in catalog)
USBLC6-2SC6Y Specifications
| Product Type | 2-line bidirectional TVS diode array |
| ESD Protection Application | USB 2.0, Ethernet, and video lines |
| Nominal Line Capacitance | 2.5 pF |
| Maximum Line Capacitance | 3.5 pF |
| Reverse Standoff Voltage | 5.25 V typical |
| Breakdown Voltage | 6 V typical |
| Clamp Voltage | 17 V |
| Peak Pulse Current | 5 A at 8/20 microseconds |
| Leakage Current | 10 nA |
| Maximum Leakage Current | 150 nA |
| Protected Lines | 2 |
| Bidirectional Operation | Yes |
| Package | SOT-23-6 |
| Mounting Type | Surface Mount |
| Polarity | 2-channel bidirectional array |
| Packaging | Cut Tape (CT) |
| RoHS Status | Compliant |
USBLC6-2SC6Y Pin Configuration
| Pin 1 | I/O1 — Protected bidirectional line 1 |
| Pin 2 | GND — Ground connection |
| Pin 3 | I/O2 — Protected bidirectional line 2 |
| Pin 4 | I/O2 — Protected bidirectional line 2 continuation or duplicated protected connection per package drawing |
| Pin 5 | GND — Ground connection |
| Pin 6 | I/O1 — Protected bidirectional line 1 continuation or duplicated protected connection per package drawing |
Typical Applications
USBLC6-2SC6Y is suitable for 7 applications: USB 2.0 Data-Line Protection, Ethernet-Link Protection, Video-Line Protection, USB Peripheral Power Entry, Battery-Powered Portable Interfaces, High-Speed Transceiver Inputs, Industrial Control and Communication Ports.
USB 2.0 Data-Line Protection
The USBLC6-2SC6Y fits USB 2.0 data-line protection because its verified 2.5 pF nominal capacitance helps limit loading on differential D+ and D- signals, while the 17 V clamp and 5 A 8/20-microsecond rating provide transient diversion. Mount the two-line array close to the USB connector so ESD current is shunted before reaching the transceiver or controller. The low-capacitance topology supports signal integrity, but the USB signal rate, impedance, connector structure, and VBUS requirements still determine the final protection network and compliance testing.
Recommended
Ethernet-Link Protection
The USBLC6-2SC6Y is suitable for low-capacitance protection of suitable Ethernet links because the manufacturer identifies Ethernet among its target high-speed interfaces. Its two bidirectional channels can protect a selected pair when the pin mapping and voltage conditions match the Ethernet signal requirements. The verified 2.5 pF nominal capacitance and 150 nA maximum leakage specification help preserve signal quality, but Ethernet implementations may require additional protection, common-mode filtering, or surge protection depending on cable length and system exposure.
Recommended
Video-Line Protection
The USBLC6-2SC6Y can be placed on selected video lines when the interface’s voltage and timing are compatible with the device’s 5.25 V typical reverse standoff and approximately 6 V typical breakdown ratings. The low-capacitance array is intended to preserve signal integrity while diverting ESD transients. Because video interfaces can include control, sync, differential, and high-voltage signals, engineers should protect only the compatible lines and confirm channel mapping, return-path continuity, and the required protection level in the system schematic.
Recommended
USB Peripheral Power Entry
USBLC6-2SC6Y is relevant to USB peripheral power-entry protection because the verified distributor description lists protection of USB lines and VBUS-related protection features. Its two-channel bidirectional arrangement can be integrated near the connector, provided the protected lines and pin mapping match the intended USB architecture. For USB power, verify the maximum bus voltage and whether a dedicated power-path or overvoltage device is required; the USBLC6-2SC6Y is primarily characterized as an ESD-protection array rather than a complete USB power-management solution.
Recommended
Battery-Powered Portable Interfaces
The low-capacitance USBLC6-2SC6Y is appropriate for battery-powered portable equipment when the system needs ESD protection without excessive signal loading or leakage. Verified distributor data lists 10 nA nominal leakage in one listing and 150 nA maximum leakage in another source, so the final selection must use the manufacturer’s specified test conditions. The SOT-23-6 package supports compact board layouts, and placing the array near the external connector helps keep transient current away from sensitive low-voltage circuitry.
Recommended
High-Speed Transceiver Inputs
USBLC6-2SC6Y can be used on compatible transceiver inputs because its application-specific low-capacitance construction is intended to protect high-speed interfaces. The verified nominal capacitance of 2.5 pF and 17 V clamp specification provide a defined electrical starting point, while the bidirectional channels can accept positive or negative ESD transients. Protection placement should be evaluated against transceiver input capacitance, edge-rate requirements, board impedance, and connector geometry; the device should not be treated as a substitute for surge protection or a complete receiver protection system.
Recommended
Industrial Control and Communication Ports
The USBLC6-2SC6Y is applicable to protected communication ports in industrial equipment where connectors may be exposed to electrostatic discharge. Its two-line bidirectional format supports targeted protection of compatible low-voltage signal pairs, and the 5 A 8/20-microsecond pulse rating provides a defined transient withstand specification. Industrial systems should also assess cable-length transients, ground continuity, isolation barriers, and the need for separate surge suppression. The array is best used as a focused ESD-protection element close to the exposed connector.
Recommended
Recommended Products Summary
Engineering reference data for USBLC6-2SC6Y — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | USBLC6-2SC6 | ESDALC6V1-1U2 |
|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Package | SOT-23-6 | SOT-23-6 | SOT-23-6 |
| Product Type | 2-line bidirectional TVS diode array | Low-capacitance TVS diode array | Low-capacitance ESD protection array |
| Protection Application | USB 2.0, Ethernet, and video lines | High-speed data-line ESD protection | High-speed interface ESD protection |
Key Differentiators
- Application-specific two-line protection (vs ESDALC6V1-1U2)
- Verified low nominal capacitance (vs ESDALC6V1-1U2)
- Defined transient clamp specification (vs USBLC6-2SC6)
Design Notes
Place the USBLC6-2SC6Y close to the connector-side pads so ESD current is diverted before it reaches the protected IC. Keep the protection traces short and provide a low-impedance return path to the interface ground. Avoid routing sensitive high-speed traces underneath the array or splitting the return path around unrelated circuitry. Confirm the package pin mapping against the manufacturer drawing before finalizing the PCB.
Use the verified 2.5 pF nominal capacitance as the starting point for USB 2.0 signal-integrity analysis, while also checking the 3.5 pF maximum line-capacitance figure under the relevant test conditions. Include connector, controller, transceiver, and protection-device capacitance in edge-rate and impedance analysis. Place the array where its capacitance will not create an unintended impedance discontinuity on the protected pair.
Do not select the array solely by its USB label. Verify the protected-line count, bidirectional behavior, standoff voltage, clamp voltage, package dimensions, pin mapping, and qualification requirements against the actual interface. The 5.25 V typical reverse standoff is not a substitute for confirming the maximum normal operating voltage, especially on VBUS or externally exposed lines. Use separate surge or power-path protection when the system exposure exceeds the device’s characterized ESD application.
Compliance Information
RoHS compliance is stated in the verified distributor specifications. REACH, lead-free, halogen-free, conflict-minerals, and AEC-Q100 information was not provided. The automotive-related search result should not be treated as proof of AEC-Q100 qualification.
