STMicroelectronics TN1205H-6G-TR

Overview

TN1205H-6G-TR from STMicroelectronics is a 600 V, 12 A RMS sensitive-gate SCR in D²PAK (TO-263) package, rated for 150 °C junction operation and 2–5 mA gate trigger current. It serves as a high-noise-immunity AC line switch in crowbar protection, motor control, and inrush limiting circuits where thermal margin and compact surface-mount packaging are critical.

For engineers reviewing the TN1205H-6G-TR datasheet, TN1205H-6G-TR pinout, TN1205H-6G-TR application, or TN1205H-6G-TR equivalent, key selection criteria include dV/dt immunity at 150 °C (100 V/µs), I²t rating (72 A²s), thermal resistance R_th(j-c) (1.3 °C/W), gate sensitivity (≤5 mA), and RoHS-compliant D²PAK footprint compatibility with automated SMT assembly.

Technical Context

This SCR operates in all standard triggering modes-DC, phase-controlled, and capacitive discharge-with guaranteed turn-on at ≤5 mA gate current and ≥0.2 V gate-to-cathode voltage under blocking conditions. Its 100 A/µs critical dl/dt and 100 V/µs dV/dt at T_j = 150 °C enable robust commutation in noisy industrial environments.

The device features low on-state voltage (1.6 V at 24 A, 25 °C; 0.8 V at 150 °C) and dynamic resistance of 30 mΩ, supporting efficient power handling with minimal conduction loss. Thermal design is enabled by validated junction-to-case resistance (1.3 °C/W) and defined D²PAK PCB copper area requirements for ambient thermal management.

Key Specifications

Pinout & Package

D²PAK (TO-263) surface-mount package with isolated tab (pin 3), optimized for thermal transfer to PCB copper pour. Standard 3-pin layout: Anode (pin 1), Cathode (pin 2), Gate (pin 3).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TN1205H-6G-TR, TN1215H-6G-TR trades gate sensitivity for enhanced noise immunity, while S4012L sacrifices SMT scalability and thermal performance for through-hole robustness-making TN1205H-6G-TR optimal for space-constrained, high-volume, thermally demanding SMT applications.

Availability

TN1205H-6G-TR is available at Aetrix Electronics and suitable for overvoltage crowbar protection, power tool motor control, and inrush current limiting circuits requiring stable component supply across automotive aftermarket, industrial controls, and white goods manufacturing.

Supply support for TN1205H-6G-TR 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.

TN1205H belongs to ST's high-temperature SCR product line, engineered specifically for reliable AC power control in thermally aggressive environments where conventional SCRs fail-targeting appliance, power tool, and industrial equipment designers.

FAQ

What is the maximum gate trigger current specification for TN1205H-6G-TR?

The maximum gate trigger current (I_GT) is 5 mA at V_D = 12 V and R_L = 33 Ω, tested per IEC 61000-4-4. This value is guaranteed across the full −40 to +150 °C junction temperature range, ensuring consistent turn-on behavior in high-ambient applications such as enclosed kitchen appliances.

Can TN1205H-6G-TR be used in phase-control dimming circuits?

Yes-its 2–5 mA gate sensitivity, 1.9 µs typical turn-on time, and 100 V/µs dV/dt immunity at 150 °C make it suitable for leading-edge phase-control dimming of resistive and inductive loads up to 1.5 kW. Gate drive must include RC snubbing and zero-crossing synchronization to prevent misfiring.

What is the recommended PCB copper area for thermal management of TN1205H-6G-TR?

For ambient temperature operation up to 70 °C, ST recommends ≥10 cm² of 35 µm copper on the D²PAK tab side, with thermal vias to inner/ground planes. With 10 cm², R_th(j-a) drops to ~45 °C/W; doubling copper area to 20 cm² further reduces it to ~35 °C/W per Figure 11 in DS7117.

Is TN1205H-6G-TR compatible with lead-free reflow profiles?

Yes-it is ECOPACK2 certified with lead-free terminations and halogen-free molding compound. It complies with IPC-J-STD-020 MSL3 and supports peak reflow temperatures up to 260 °C for 10 seconds, matching standard Pb-free SAC305 profiles without delamination or parametric shift.