STMicroelectronics P0102DA 5AL3

Overview

P0102DA 5AL3 from STMicroelectronics is a sensitive gate SCR thyristor in TO-92 preformed leads package, rated for 400 V repetitive peak off-state voltage (VDRM/VRRM), 0.8 A RMS on-state current (IT(RMS)), and 0.2 mA maximum gate trigger current (IGT). It operates up to 125 °C junction temperature and is designed for low-power gate-driven crowbar protection and residual current detection circuits.

For engineers reviewing the P0102DA datasheet, P0102DA pinout, P0102DA application, or P0102DA equivalent, key selection criteria include its 200 µA IGT sensitivity, 75 V/µs dV/dt immunity at 125 °C, 1.95 V max on-state voltage at 1.6 A, 80 °C/W junction-to-lead thermal resistance, and ECOPACK2-compliant TO-92 packaging.

Technical Context

This SCR uses a highly sensitive gate structure enabling reliable triggering with as little as 200 µA gate current, making it suitable for microcontroller-driven or low-power analog gate driver circuits. Its 400 V blocking capability and 75 V/µs dV/dt rating at 125 °C support robust operation in noisy AC line sensing and fault-interrupting applications.

The device features a low 0.95 V threshold on-state voltage (VTO) and 600 mΩ dynamic resistance (Rd) at 125 °C, minimizing conduction losses in standby-mode power supplies and arc-fault detectors where thermal management is constrained by the TO-92 package.

Key Specifications

Pinout & Package

Supplied in TO-92 package with preformed leads (ordering code suffix 5AL3), featuring three terminals: Anode (A), Cathode (K), and Gate (G). Lead finish is lead-free and halogen-free per ECOPACK2 requirements.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar sensitive-gate SCR applications.

Compared with STP0102DA and BT169G-TR, P0102DA 5AL3 uniquely balances ultra-low 200 µA gate sensitivity, 0.8 A RMS rating, and optimized thermal path via preformed leads-making it ideal for space-constrained, microcontroller-driven safety interrupters requiring guaranteed turn-on at minimal drive energy.

Availability

P0102DA 5AL3 is available at Aetrix Electronics and suitable for ground fault circuit interrupters, arc fault detectors, standby-mode power supply crowbars, and residual current monitoring systems requiring stable component supply and long-term manufacturability.

Supply support for P0102DA 5AL3 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.

P0102DA belongs to ST's high-immunity sensitive SCR product line, engineered specifically for safety-critical AC line protection, fault interruption, and low-energy gate drive applications where reliability under electrical stress is paramount.

FAQ

What is the maximum gate trigger current (IGT) specification for P0102DA 5AL3?

The maximum gate trigger current (IGT) is 200 µA at 25 °C, tested with 12 V anode-to-cathode voltage and 33 Ω load. This value increases slightly with junction temperature but remains ≤300 µA up to 125 °C per Figure 6 in DS13119 Rev 3. The low IGT enables direct drive from microcontroller GPIOs without buffer stages.

Can P0102DA 5AL3 be used in AC mains-connected crowbar circuits?

Yes - its 400 V VDRM/VRRM rating provides sufficient margin for 230 VAC RMS (325 V peak) applications, and its 75 V/µs dV/dt immunity at 125 °C prevents false triggering from line transients. It must be paired with appropriate gate protection (e.g., series resistor and Zener clamp) and coordinated with upstream fusing per IEC 61000-4-5 requirements.

What is the thermal resistance from junction to lead (Rth(j-l)) for this part?

Rth(j-l) is 80 °C/W (DC), measured from junction to TO-92 lead under specified test conditions. This value applies to the 5AL3 variant with preformed leads and is lower than the 150 °C/W Rth(j-a) - confirming that heat transfer occurs primarily through the leads rather than ambient air, critical for sustained 0.8 A operation on standard FR4 PCBs.

Is P0102DA 5AL3 compliant with environmental regulations?

Yes - it is ECOPACK2-compliant, meaning it uses lead-free plating and halogen-free molding compound, meeting RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Full material declarations and compliance documentation are available from STMicroelectronics' quality portal upon request with valid order number.