STMicroelectronics SMP100MC-160

Overview

SMP100MC-160 from STMicroelectronics is a bidirectional thyristor surge suppressor (TSS) designed for fail-safe overvoltage protection on high-speed data lines. It features a 160 V breakover voltage (VBO), 25 mA holding current (IH), 100 A repetitive peak pulse current (10/1000 μs), and micro capacitance of 50 pF at 50 V - enabling low-signal-distortion protection in ADSL2+ and VDSL line cards.

For engineers reviewing the SMP100MC-160 datasheet, SMP100MC-160 pinout, SMP100MC-160 application, or SMP100MC-160 equivalent, this device is selected for telecom-grade transient suppression where UL497B recognition, IEC 61000-4-5 compliance, and sub-30 pF capacitance at 2 V bias are critical design requirements.

Technical Context

The SMP100MC-160 operates as a voltage-triggered crowbar device with bidirectional conduction, entering low-impedance latching mode upon exceeding its dynamic breakover voltage (205 V typ.) and sustaining conduction until current falls below 25 mA IH. Its fail-safe short-circuit behavior under overstress ensures equipment-level continuity of protection without open-circuit degradation.

Designed for telecom infrastructure interfaces, it meets GR-1089 Core (first/second/intra-building levels), ITU-T K20/K21, and TIA/EIA IS-968 lightning surge standards - validated with 100 A (10/1000 μs), 140 A (10/560 μs), and 150 A (5/310 μs) surge ratings and zero external series resistance requirement in standard test configurations.

Key Specifications

Pinout & Package

Package: DO-214AA (SMB), JEDEC-registered surface-mount package with UL94 V0 epoxy, lead-free plating, and halogen-free molding compound. Thermal resistance Rth(j-a) = 100 °C/W with recommended footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMP100MC-160, SP1002-014 offers tighter VBO tolerance for 48 V telecom lines but lacks GR-1089 Core validation; SP1002-020 provides lower capacitance for Ethernet but requires higher trigger voltage - making SMP100MC-160 optimal for balanced ADSL2+/VDSL protection where 160 V VBO and 30–50 pF trade-off is validated.

Availability

SMP100MC-160 is available at Aetrix Electronics and suitable for ADSL2+ line card design, VDSL central office interface protection, and modem/fax terminal surge compliance requiring stable component supply and full traceability.

Supply support for SMP100MC-160 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, MCU, power, and protection devices for industrial, automotive, and communications markets.

The SMP100MC series belongs to ST's Telecom Circuit Protector product line, engineered specifically to replace MOVs and GDTs in high-data-rate line interfaces where low capacitance, precise VBO, and fail-safe crowbar behavior are mandatory.

FAQ

What is the fail-safe behavior of SMP100MC-160 during surge events?

Under overvoltage stress exceeding its breakover voltage, SMP100MC-160 latches into a low-impedance short-circuit state and remains conductive until current drops below 25 mA. This fail-safe mode prevents open-circuit failure, ensuring continuous protection even after multiple surges - verified per IEC 61000-4-5 and GR-1089 Core test protocols.

Does SMP100MC-160 require an external series resistor for standard compliance?

No. SMP100MC-160 meets GR-1089 Core, ITU-T K20/K21, and IEC 61000-4-5 requirements without any external series resistor - confirmed in Table 1 of DS3406 Rev 6, where minimum serial resistor is listed as 0 Ω for all applicable waveform combinations including 10/1000 μs and 10/700 μs.

How does the 30 pF capacitance at 2 V bias impact ADSL2+ performance?

At 2 V reverse bias, SMP100MC-160 exhibits 30 pF capacitance - low enough to maintain >20 dB return loss across the full ADSL2+ band (up to 2.2 MHz), preventing echo cancellation errors and ensuring bit error rates remain below 10⁻⁷. This value is measured per Figure 9 in DS3406 Rev 6 at 1 MHz.

Is SMP100MC-160 compatible with lead-free reflow soldering processes?

Yes. The SMB (DO-214AA) package supports lead-free reflow with a maximum lead temperature of 260 °C for 10 seconds, as specified in Table 2 of DS3406 Rev 6. Its halogen-free molding compound and lead-free plating comply with RoHS and JEDEC J-STD-020D moisture sensitivity level 1 requirements.