STMicroelectronics DSL04-012SC6

Overview

DSL04-012SC6 from STMicroelectronics is a low-capacitance bidirectional TVS diode array designed to protect VDSL2 line drivers in CPE and DSLAM equipment against IEC 61000-4-2 (±15 kV air, ±8 kV contact), IEC 61000-4-5 (±1 kV), and MIL-STD-883H Class 3 (8 kV HBM) surges. It features 12 V standoff voltage (VRM), 14 V minimum breakdown (VBR), 31 V clamping at 15 A (8/20 µs), 1 pF typical capacitance, and 0.2 µA leakage at 25 °C.

For engineers reviewing the DSL04-012SC6 datasheet, DSL04-012SC6 pinout, DSL04-012SC6 application, or DSL04-012SC6 equivalent, this device is selected for high-speed xDSL line protection where sub-2 pF capacitance, precise 12 V operating margin, and robust multi-standard surge immunity are required in SOT23-6L space-constrained layouts.

Technical Context

This TVS array uses a monolithic silicon avalanche structure optimized for symmetric bidirectional clamping across differential line pairs. Its design integrates two back-to-back transient suppression paths between I/O1–(+VLD/–VLD) and I/O2–(+VLD/–VLD), enabling flexible connection of the middle terminals depending on grounding strategy or gas tube co-location.

The device operates within –40 °C to +125 °C junction temperature range and maintains stable clamping performance under repeated 15 A 8/20 µs pulses. Its 1 pF capacitance at 2 V bias ensures minimal signal distortion up to VDSL2's 30 MHz bandwidth, while the 0.2 µA leakage supports low-power line driver bias integrity.

Key Specifications

Pinout & Package

SOT23-6L package: 6-pin surface-mount outline with gull-wing leads, 0.95 mm pitch, 2.8–3.05 mm length, 1.5–1.75 mm width, and 1.1–1.3 mm height. Complies with JEDEC MO-178AB.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed line protection applications.

Compared with SP1003-012 and TPD2E007DRYR, DSL04-012SC6 uniquely delivers bidirectional 12 V standoff with 1 pF capacitance and integrated ±VLD nodes-enabling direct coordination with GDTs in telecom-grade line cards where signal fidelity and multi-standard surge compliance are non-negotiable.

Availability

DSL04-012SC6 is available at Aetrix Electronics and suitable for ADSL/VDSL line interface design, DSLAM line card protection, CPE Ethernet-over-VDSL bridge development, and multi-mode xDSL modem production requiring stable component supply and long-term lifecycle assurance.

Supply support for DSL04-012SC6 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and protection devices for industrial, automotive, and communications markets.

DSL04 belongs to ST's dedicated telecom protection product line, engineered specifically for xDSL infrastructure applications where low capacitance, precise voltage thresholds, and multi-standard surge resilience are mandatory for interoperability and regulatory certification.

FAQ

What is the maximum continuous operating voltage for DSL04-012SC6?

The maximum continuous operating voltage (standoff voltage VRM) is 12 V. This is the highest DC or RMS voltage that can be continuously applied without exceeding 0.2 µA leakage current at 25 °C. Operation above this level risks premature conduction and accelerated degradation under sustained bias.

Can the ±VLD pins be left unconnected in a DSL04-012SC6 design?

Yes, the +VLD and –VLD pins may be left unconnected in applications where no external voltage reference or gas tube coordination is needed. The device functions as a standalone bidirectional TVS between I/O1 and I/O2. However, connecting them improves clamping symmetry and enables staged protection architectures with GDTs.

Does DSL04-012SC6 meet IEC 61000-4-5 Level 3 requirements?

No. DSL04-012SC6 is rated for IEC 61000-4-5 Level 2 (±1 kV, 42 Ω source impedance). Level 3 requires ±2 kV, which exceeds its specified 31 V clamping limit at 15 A. For Level 3, a higher-energy TVS or cascaded protection topology with upstream GDT is necessary.

Is DSL04-012SC6 compatible with lead-free reflow profiles?

Yes. The SOT23-6L package is lead-free and qualified for standard Pb-free reflow per IPC/JEDEC J-STD-020. Peak temperature must not exceed 245 °C, with ramp rate limited to ≤3 °C/s and time above 220 °C held to 60–90 seconds, matching ST's recommended profile in DS8922 Rev 3.