STMicroelectronics X00619MN5AL2

Overview

X00619MN5AL2 from STMicroelectronics is a sensitive-gate silicon-controlled rectifier (SCR) optimized for low-trigger-current topologies, featuring 0.8 A RMS on-state current, 600 V repetitive peak off-state voltage (VDRM/VRRM), and gate trigger current range of 30–200 µA. It operates reliably up to 125 °C junction temperature and is used in ground fault circuit interrupters, overvoltage crowbar protection, and capacitive discharge ignitors where limited gate drive capability exists.

For engineers reviewing the X00619MN5AL2 datasheet, X00619MN5AL2 pinout, X00619MN5AL2 application, or X00619MN5AL2 equivalent, this device serves as a robust, ECOPACK2-compliant SCR for harsh-environment power control with precise dV/dt immunity (≥40 V/µs at 125 °C) and low forward voltage drop (≤1.35 V at 1 A, 25 °C).

Technical Context

This SCR employs a planar passivated junction structure enabling stable triggering across temperature (IGT increases only ~1.6× from 25 °C to 125 °C) and high static dV/dt immunity-enhanced by gate-cathode resistance tuning per Figure 8. Its low dynamic resistance (≤245 mΩ at 125 °C) minimizes conduction losses during surge events.

The device supports both DC and phase-controlled AC operation with α = 30°–180° conduction angles. Thermal design is enabled by validated Rth(j-c) = 30 °C/W (SOT-223) and Rth(j-a) = 60 °C/W (with 5 cm² copper pad), allowing direct thermal coupling to PCB heatsinking without external heatsinks in moderate-power applications.

Key Specifications

Pinout & Package

SOT-223 package: 4-pin surface-mount outline with tab (pin 4) serving as cathode connection and primary thermal path. Package meets UL94 V0 flammability rating and uses lead-free plating with halogen-free molding compound.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar SCR-based protection and ignition applications.

Compared with BT169G and TYN608, X00619MN5AL2 uniquely balances ultra-low gate drive, 600 V blocking, SMT compatibility, and 125 °C operation-making it optimal for compact, thermally constrained, mains-connected safety and ignition systems where gate current is inherently limited.

Availability

X00619MN5AL2 is available at Aetrix Electronics and suitable for ground fault circuit interrupters, overvoltage crowbar protection circuits, and capacitive discharge ignitors requiring stable component supply and long-term manufacturability.

Supply support for X00619MN5AL2 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 sensor solutions for industrial, automotive, and consumer markets.

X00619 belongs to ST's Sensitive SCR product line, engineered specifically for low-power gate drive applications-including GFCIs, electronic ballasts, and appliance ignitors-where traditional SCRs fail to trigger reliably.

FAQ

What is the maximum allowable gate-cathode resistance for reliable triggering?

Per Figure 7 in DS6289 Rev 4, holding current IH increases significantly above RGK = 1 kΩ-exceeding 5 mA at RGK = 10 kΩ. For guaranteed turn-on with IGT ≤200 µA, RGK must not exceed 1 kΩ. Higher values risk latch failure or intermittent conduction, especially at elevated temperatures.

Can X00619MN5AL2 replace a standard 400 V SCR in a 230 VAC GFCI?

Yes-its 600 V VDRM provides 50% margin above 230 VAC peak (325 V), improving noise immunity and long-term reliability. However, its lower IT(RMS) (0.8 A vs. typical 1–2 A for 400 V SCRs) requires verification of sustained load current and thermal derating in the target PCB layout.

Does the SOT-223 package require thermal vias under the tab?

Thermal vias are strongly recommended: Table 4 specifies Rth(j-a) = 60 °C/W with 5 cm² copper area *and* FR4 board. Without vias, heat transfer from the tab to inner layers is impeded, raising junction temperature by 15–25 °C under 0.5 A DC load-potentially violating the 125 °C Tj limit.

How does dV/dt immunity change with gate-cathode capacitance?

Figure 9 shows dV/dt immunity improves with increasing CGK: at CGK = 10 nF, immunity is ~3× higher than at CGK = 1 nF (RGK = 1 kΩ). Adding 1–10 nF ceramic capacitor between gate and cathode enhances noise rejection but may slow turn-on time-verify timing margins in phase-control applications.