STMicroelectronics X00602MA 5AL2

Overview

X00602MA 5AL2 from STMicroelectronics is a logic-level sensitive silicon-controlled rectifier (SCR) in TO-92 package, rated for 0.8 A RMS on-state current and 600 V repetitive peak off-state voltage, with a low 200 µA gate trigger current. It serves as a robust, low-power-triggered AC switch in crowbar protection, ground fault interrupters, and capacitive discharge ignition circuits.

For engineers reviewing the X00602MA 5AL2 datasheet, X00602MA 5AL2 pinout, X00602MA 5AL2 application, or X00602MA 5AL2 equivalent, key selection criteria include gate sensitivity (IGT ≤ 200 µA), thermal resistance (Rth(j-l) = 70 °C/W), forward voltage drop (VTM ≤ 1.35 V @ 1 A), dV/dt immunity (≥25 V/µs), and ECOPACK2 compliance for industrial-grade reliability.

Technical Context

The X00602MA 5AL2 is a unidirectional thyristor optimized for low-gate-current triggering in AC line-switching applications where drive capability is limited. Its 200 µA IGT enables direct interface with microcontrollers or optocouplers without external amplification.

It features a 125 °C maximum junction temperature, 50 A/µs critical di/dt rating, and 25 V/µs minimum static dV/dt immunity at 125 °C - ensuring stable turn-on under noisy line conditions and high inrush tolerance during cold-start events in lighting and power supply protection circuits.

Key Specifications

Pinout & Package

Supplied in TO-92 package with preformed leads (5AL2 packing mode), the X00602MA 5AL2 uses standard anode–cathode–gate terminal configuration. The plastic body meets UL94 V0 flammability rating and incorporates lead-free plating with halogen-free epoxy.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STX00602MA 1AA2, the X00602MA 5AL2 offers automated placement compatibility via tape-and-reel; versus S4006L, its 200 µA IGT and 1.35 V VTM deliver superior gate drive efficiency and lower thermal load in space-constrained GFCI and CDI modules.

Availability

X00602MA 5AL2 is available at Aetrix Electronics and suitable for ground fault interrupters, overvoltage crowbar protection, and capacitive discharge ignition systems requiring stable component supply, consistent lead-time visibility, and long-term lifecycle support.

Supply support for X00602MA 5AL2 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 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 circuits where minimal drive power and high noise immunity are essential.

FAQ

What is the maximum junction temperature and how does it affect thermal design?

The X00602MA 5AL2 has a maximum junction temperature of 125 °C. With Rth(j-l) = 70 °C/W, sustained 0.8 A RMS operation generates ~0.86 W of power loss (VTM × IT(AV)), requiring lead temperature to remain ≤83 °C. PCB copper area and ambient airflow must be sized accordingly to avoid derating.

Can this SCR be driven directly from a 3.3 V microcontroller GPIO?

Yes - with IGT ≤ 200 µA and VGT ≤ 0.8 V, the X00602MA 5AL2 can be triggered using a 3.3 V GPIO through a 10 kΩ series resistor (delivering ~330 µA), well above minimum requirement. A 100 nF gate-cathode capacitor improves noise immunity without delaying turn-on.

How does the dV/dt rating impact layout in high-noise environments?

A minimum dV/dt of 25 V/µs at 125 °C means the SCR resists false triggering from fast transients. Layout best practices include minimizing gate loop area, using short gate traces referenced to cathode, and adding a 100 Ω resistor + 100 pF capacitor from gate to cathode to suppress RF coupling without compromising turn-on speed.

Is the TO-92 package suitable for reflow soldering?

No - the TO-92 package is rated for wave or hand soldering only. Peak temperature must not exceed 260 °C for ≤10 seconds. Reflow profiles risk internal delamination and bond wire damage due to thermal mismatch between plastic body and leadframe; use only recommended leaded or lead-free wave soldering parameters per DS1704.