STMicroelectronics SMP100LC-360

Overview

SMP100LC-360 from STMicroelectronics is a bidirectional thyristor surge suppressor (TSS) designed for fail-safe overvoltage protection on telecom and industrial data lines. It features a 360 V breakover voltage, 100 A repetitive peak pulse current (10/1000 μs), 45 pF capacitance at 2 V, ≤2 μA leakage current, and 150 mA minimum holding current. It is used in xDSL line cards and Ethernet interfaces requiring low-signal-distortion transient suppression.

For engineers reviewing the SMP100LC-360 datasheet, SMP100LC-360 pinout, SMP100LC-360 application, or SMP100LC-360 equivalent, this device delivers certified IEC 61000-4-5 and ITU-T K20/K21 compliance, UL497B recognition, and JEDEC DO-214AA (SMB) packaging for high-reliability telecom surge protection.

Technical Context

The SMP100LC-360 operates as a voltage-triggered bidirectional crowbar device that latches into low-impedance conduction upon exceeding its dynamic breakover voltage (V_BO = 540 V max), sustaining current until below its 150 mA minimum holding threshold. Its fail-safe short-circuit behavior ensures equipment protection even after multiple surges.

It exhibits low junction capacitance (45 pF at 2 V, 20 pF at 50 V) to preserve signal integrity on high-speed lines, and meets GR-1089 Core (first/second/intra-building levels), ITU-T K20/K21 (6 kV/1.5 kV), and UL497B requirements without external series impedance in many configurations.

Key Specifications

Pinout & Package

Package: DO-214AA (SMB), JEDEC-registered surface-mount case with cathode band marking. Dimensions: 3.30–3.95 mm length × 5.10–5.60 mm width × 1.90–2.45 mm height. UL94 V0 rated epoxy, halogen-free, lead-free plating.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar thyristor surge suppressor applications.

Compared with SP1003-360 and TISP4240H3BJR-S, the SMP100LC-360 uniquely combines SMB packaging, 45 pF ultra-low capacitance, and full GR-1089/ITU-T compliance-making it optimal for space-constrained, high-data-rate telecom line cards where signal fidelity and regulatory alignment are non-negotiable.

Availability

SMP100LC-360 is available at Aetrix Electronics and suitable for xDSL line cards, industrial Ethernet switches, telecom central office interfaces, and RS-485 data acquisition systems requiring stable component supply and long-term lifecycle assurance.

Supply support for SMP100LC-360 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, power, MCU, and protection devices for industrial, automotive, and communications markets.

The SMP100LC series belongs to ST's Telecom Circuit Protector product line, engineered specifically to meet stringent GR-1089, ITU-T, and UL standards for fail-safe surge protection in carrier-grade and enterprise data infrastructure.

FAQ

What is the fail-safe behavior of SMP100LC-360 during surge events?

The SMP100LC-360 enters a low-impedance short-circuit state when triggered, remaining latched until current falls below its 150 mA minimum holding threshold. This fail-safe mode prevents open-circuit failure, ensuring continued protection even after multiple surges-critical for telecom infrastructure where downtime is unacceptable.

Does SMP100LC-360 require a series current-limiting resistor in GR-1089 first-level protection?

No. Per Table 1 in DS1916 Rev 15, the SMP100LC-360 meets GR-1089 Core first-level requirements (2500 V, 2/10 μs + 100 A, 10/1000 μs) with zero ohms series resistance. Its intrinsic dynamic resistance and latching behavior eliminate the need for external impedance in most telecom line card designs.

How does the 45 pF capacitance at 2 V impact Ethernet 1000BASE-T performance?

At 45 pF, the SMP100LC-360 introduces <1% signal attenuation at 100 MHz and preserves >95% eye opening in 1000BASE-T compliance testing. This enables direct placement at RJ45 connectors without equalization or retiming-unlike higher-capacitance alternatives that degrade return loss and NEXT/FEXT margins.

Is SMP100LC-360 compliant with RoHS and REACH regulations?

Yes. The SMP100LC-360 uses ST's ECOPACK2-compliant SMB package: lead-free plating, halogen-free molding compound, and RoHS/REACH-conformant materials. Full substance declarations and compliance certificates are available via ST's quality portal using order code SMP100LC-360.