STMicroelectronics X00619MA1AA2

Overview

X00619MA1AA2 from STMicroelectronics is a sensitive-gate silicon-controlled rectifier (SCR) in TO-92 straight-lead package, rated for 0.8 A RMS on-state current and 600 V repetitive peak off-state voltage, with gate trigger current spanning 30–200 µA; it serves as a robust, low-power latching switch in crowbar protection circuits, electronic ballasts, and capacitive discharge ignitors.

For engineers reviewing the X00619MA1AA2 datasheet, X00619MA1AA2 pinout, X00619MA1AA2 application, or X00619MA1AA2 equivalent, key selection criteria include its low IGT range, high dV/dt immunity (≥40 V/µs at 125 °C), thermal robustness to 125 °C junction temperature, and ECOPACK2-compliant TO-92 packaging for space-constrained, safety-critical AC control designs.

Technical Context

The X00619MA1AA2 operates as a unidirectional thyristor requiring only microampere-level gate drive to latch into conduction, enabling use in topologies with limited gate current availability. Its static dV/dt immunity exceeds 40 V/µs at 125 °C with 1 kΩ gate-cathode resistance, and it sustains non-repetitive surge currents up to 10 A for 8.3 ms.

It features a low forward voltage drop (max 1.35 V at 1 A, 25 °C) and dynamic resistance of ≤245 mΩ at 125 °C, minimizing conduction losses. Thermal resistance from junction to leads is 70 °C/W, supporting reliable operation under sustained 0.5 A average current at lead temperatures up to 83 °C.

Key Specifications

Pinout & Package

Package: TO-92 with straight leads (plastic, ECOPACK2-compliant, lead-free plating, halogen-free molding compound).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar SCR switching applications.

Compared with BT169G and TYN608, the X00619MA1AA2 uniquely balances ultra-low gate sensitivity, 600 V blocking, TO-92 form factor, and ECOPACK2 compliance-making it optimal for miniaturized, safety-critical AC control where gate drive is weak and thermal envelope is tight.

Availability

X00619MA1AA2 is available at Aetrix Electronics and suitable for ground fault circuit interrupters, electronic ballasts, capacitive discharge ignitions, and oven ignitor controls requiring stable component supply across production lifecycles.

Supply support for X00619MA1AA2 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, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

The X00619 belongs to ST's sensitive-gate SCR product line, engineered specifically for low-power, high-reliability AC switching in protection, ignition, and lighting applications where minimal gate drive and thermal resilience are critical.

FAQ

What is the maximum junction temperature for continuous operation of X00619MA1AA2?

The X00619MA1AA2 has a specified operating junction temperature range of –40 °C to +125 °C. Continuous operation at 125 °C is permitted provided thermal design maintains TJ ≤ 125 °C under worst-case ambient and power dissipation conditions, verified using Rth(j-l) = 70 °C/W and measured lead temperature.

Can X00619MA1AA2 replace BT169D in an existing GFCI design?

X00619MA1AA2 can replace BT169D only if the gate drive circuit delivers ≥30 µA and the system requires 600 V blocking. BT169D has 400 V VDRM and higher typical IGT (~100 µA); substituting X00619MA1AA2 improves surge margin but may require verifying gate drive compatibility and recalculating dV/dt snubber values.

Does X00619MA1AA2 require a gate resistor, and what value is recommended?

A gate resistor is required to limit peak gate current and suppress ringing. For standard triggering with 12 V gate drive and 140 Ω load (per datasheet test condition), a 100–470 Ω resistor is typical. Lower values (≤220 Ω) ensure reliable turn-on at low temperatures; higher values improve noise immunity but may slow triggering.

Is X00619MA1AA2 compliant with RoHS and REACH regulations?

Yes, X00619MA1AA2 is ECOPACK2-compliant, meaning it meets RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, with lead-free plating and halogen-free molding compound-verified per STMicroelectronics' official compliance documentation DS6289 Rev 4.