STMicroelectronics X00605MA 1AA2

Overview

X00605MA1AA2 from STMicroelectronics is a logic-level sensitive 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 ultra-low 200 µA gate trigger current. It serves as a robust, low-power-triggered AC/DC switching device in protection circuits requiring minimal gate drive, such as ground fault interrupters and overvoltage crowbar stages.

For engineers reviewing the X00605MA1AA2 datasheet, X00605MA1AA2 pinout, X00605MA1AA2 application, or X00605MA1AA2 equivalent, this part delivers verified sensitivity, thermal robustness up to 125 °C junction temperature, and ECOPACK2-compliant packaging - critical for safety-critical, low-power-triggering SCR designs in power supply and ignition systems.

Technical Context

The X00605MA1AA2 is a unidirectional thyristor optimized for high dV/dt immunity (min. 25 V/µs at 125 °C) and low gate triggering energy, enabling reliable turn-on under weak gate drive conditions. Its 0.85 V threshold on-state voltage at 125 °C and 245 mΩ dynamic resistance minimize conduction losses during sustained operation.

Designed for limited-gate-current topologies, it features a latching current (IL) ≤ 6 mA and holding current (IH) ≤ 5 mA at 25 °C, ensuring stable conduction after triggering without continuous gate support. The device operates across –40 °C to +125 °C junction temperature range and supports non-repetitive surge currents up to 9 A (10 ms).

Key Specifications

Pinout & Package

Package: TO-92 with straight leads (plastic), ECOPACK2-compliant, lead-free plating and halogen-free molding compound. Dimensions per DS1704 Rev 6: A = 1.35 mm, B = 4.70 mm, C = 2.54 mm, D = 4.40 mm, E = 12.70 mm, F = 3.70 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BT169D and TYN108, X00605MA1AA2 uniquely balances ultra-low gate sensitivity (200 µA), 600 V blocking, and TO-92 compactness - making it optimal for miniaturized, low-power-triggered protection and ignition circuits where gate drive headroom and voltage margin are constrained.

Availability

X00605MA1AA2 is available at Aetrix Electronics and suitable for ground fault interrupters, overvoltage crowbar protection in power supplies, capacitive discharge ignitions, and oven/lighting ignitors requiring stable component supply and long-term manufacturability.

Supply support for X00605MA1AA2 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 X006 series belongs to ST's sensitive SCR product line, engineered specifically for low-energy gate triggering in safety-critical protection and ignition applications where traditional SCRs require excessive drive current.

FAQ

What is the maximum junction temperature for reliable operation?

The X00605MA1AA2 has a specified operating junction temperature range of –40 °C to +125 °C. Operation beyond 125 °C risks parametric shift and premature failure; derating curves in DS1704 show IT(AV) drops to 0.5 A at TL = 83 °C, confirming thermal design must maintain junction below limit under worst-case ambient and power dissipation.

Can this SCR be triggered directly from a microcontroller GPIO?

Yes - with IGT ≤ 200 µA and VGT ≤ 0.8 V, the X00605MA1AA2 can be triggered directly by most 3.3 V or 5 V MCU GPIO pins configured as open-drain or push-pull, provided series resistance limits gate current to ≥200 µA and ≤1 A (per IGM rating). No external transistor buffer is required.

Does the TO-92 package support adequate thermal dissipation for continuous 0.8 A operation?

No - the 0.8 A IT(RMS) rating assumes TL = 83 °C (lead temperature), not ambient. In free-air, Rth(j-a) = 150 °C/W limits practical continuous current to ~0.2 A. For 0.8 A, PCB copper pour (≥0.5 cm², 35 µm thick) and thermal vias are mandatory to achieve required lead temperature.

Is X00605MA1AA2 compliant with modern environmental standards?

Yes - it carries ECOPACK2 certification, meaning it uses lead-free plating and halogen-free molding compound, fully compliant with RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, and qualified per JEDEC J-STD-020 moisture sensitivity level MSL3.