STMicroelectronics DSL01-016SC5

Overview

DSL01-016SC5 from STMicroelectronics is a dual-stage secondary surge protection device for DSL line interfaces, integrating a Transil™ for low-energy ESD clamping and a Trisil™ for high-energy surge short-circuiting. It features 16 V standoff voltage, 20 V breakdown voltage at 1 mA, 40 mA holding current, 3.5 pF typical capacitance, and 30 A peak pulse current (8/20 µs), enabling robust protection in ADSL2+/VDSL modems after the line transformer.

For engineers reviewing the DSL01-016SC5 datasheet, DSL01-016SC5 pinout, DSL01-016SC5 application, or DSL01-016SC5 equivalent, key selection criteria include low-signal-disturbance capacitance (<4 pF), dual-mode surge response (clamping + crowbar), SOT23-5L footprint compatibility, and compliance with IEC 61000-4-2/4-5 and ITU-T K20/K21 standards.

Technical Context

The DSL01-016SC5 implements a monolithic hybrid structure combining avalanche diode (Transil) and thyristor (Trisil) on a single die to deliver staged protection: below 16 V it remains high-impedance; at ~18 V it enters low-clamping mode for ESD; above ~20 V it triggers into low-impedance short-circuit state for 30 A surges. This architecture avoids line driver disruption during normal signal transmission while ensuring fail-safe shunting of destructive transients.

Its planar SOT23-5L construction achieves <3.5 pF inter-electrode capacitance (measured 1 V to 16 V), minimizing insertion loss and phase distortion on xDSL signals up to 30 MHz. Pin configuration enforces differential protection topology - pins 1&5 tied as one terminal, pins 3&4 as the other, with pin 2 left unconnected - matching transformer-coupled line driver outputs.

Key Specifications

Pinout & Package

DSL01-016SC5 is housed in a RoHS-compliant, lead-free SOT23-5L (SC-59) package with UL 94 V0 epoxy molding. Dimensions: 2.8–3.0 mm × 1.5–1.75 mm × 1.1–1.2 mm (L×W×H). Thermal resistance: R_thJA = 260 °C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar DSL line protection applications.

Compared with SP1003-016 and SM712, DSL01-016SC5 uniquely delivers sub-4 pF capacitance with 30 A surge capability in SOT23-5L - enabling full VDSL2 spectrum support without sacrificing robustness or footprint efficiency.

Availability

DSL01-016SC5 is available at Aetrix Electronics and suitable for ADSL2+ modems, VDSL2 line cards, and multi-service access nodes requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for DSL01-016SC5 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 analog, microcontroller, power, and sensor solutions for industrial, automotive, and communications markets.

The DSL01 series belongs to ST's Transil™ transient protection product line, engineered specifically for broadband line interface protection where low capacitance and staged surge response are mandatory for signal fidelity and system reliability.

FAQ

What is the maximum operating temperature for DSL01-016SC5?

The DSL01-016SC5 has an operating junction temperature range of –40 °C to +125 °C, verified per Table 1 in the official datasheet (Doc ID 13179 Rev 3). Its thermal resistance (R_thJA) is 260 °C/W under standard JEDEC conditions, requiring appropriate PCB copper pour for sustained 30 A surge duty cycles.

Can DSL01-016SC5 be used for primary-side DSL protection?

No - DSL01-016SC5 is explicitly designed for secondary-side (post-transformer) protection per Figure 5 and Application Information section. Its 16 V standoff and 3.5 pF capacitance are optimized for low-voltage line driver interfaces; primary-side use would violate its absolute maximum ratings and compromise surge handling.

How should unused pin 2 be handled in PCB layout?

Pin 2 must remain unconnected - no trace, pad, or solder mask opening should contact it. Per Figure 6 and "Application information" page 4, connecting pin 2 creates parasitic paths that degrade capacitance stability and may cause premature triggering during fast transients.

Does DSL01-016SC5 meet Telcordia GR-1089 requirements?

Yes - the DSL01-016SC5 meets GR-1089 Category A (common-mode) and Category B (differential-mode) requirements for telecommunications equipment, validated by its 30 A (8/20 µs) surge rating and low-capacitance design, as confirmed in the "Complies with the following standards" section of the datasheet.