STMicroelectronics T1250H-6G-TR

Overview

T1250H-6G-TR from STMicroelectronics is a 12 A, 600 V Snubberless™ Triac in D2PAK surface-mount package, rated for 150 °C junction operation and optimized for high-power universal motor control. It delivers 50 mA maximum gate trigger current (IGT), 1500 V/µs minimum dV/dt immunity at 150 °C, and 21 A/ms critical commutation (dI/dt)c - enabling robust AC mains switching in vacuum cleaner and washing machine drum motor drives without external snubbers.

For engineers reviewing the T1250H-6G-TR datasheet, T1250H-6G-TR pinout, T1250H-6G-TR application, or T1250H-6G-TR equivalent, key selection criteria include its 150 °C thermal rating, 1.4 °C/W junction-to-case thermal resistance, 120 A non-repetitive surge capability, and D2PAK footprint compatibility with high-density PCB layouts.

Technical Context

This Triac operates in all three quadrants with guaranteed turn-off commutation up to 150 °C junction temperature, leveraging internal ceramic insulation rated at 2500 V_rms. Its low dynamic resistance (30 mΩ at 150 °C) and threshold voltage (0.80 V) minimize conduction losses during continuous 12 A RMS switching at elevated temperatures.

The device uses clip-bonding construction to achieve low thermal resistance and high 3-quadrant commutation margin - critical for phase-controlled universal motor loads where rapid current reversal occurs under high junction temperature stress and zero-crossing uncertainty.

Key Specifications

Pinout & Package

D2PAK (TO-263) surface-mount package with isolated tab; thermally enhanced clip-bonded construction and UL-certified (E81734) insulation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BTB12-600CW and Q6012LH4, the T1250H-6G-TR provides superior thermal performance (1.4 °C/W), higher dV/dt immunity (1500 V/µs), and UL certification - making it the preferred choice for consumer appliance designs requiring compact, certified, and thermally efficient AC switching.

Availability

T1250H-6G-TR is available at Aetrix Electronics and suitable for vacuum cleaner motor control, washing machine drum drive, and power tool speed regulation requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for T1250H-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, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

The T12xxH series belongs to ST's high-temperature Snubberless™ Triac product line, engineered specifically for compact, high-efficiency AC motor control in thermally demanding white goods and power tools.

FAQ

What is the maximum junction temperature for reliable operation of T1250H-6G-TR?

The T1250H-6G-TR is rated for continuous operation up to 150 °C junction temperature, with guaranteed turn-off commutation and electrical parameters validated at this limit. Its 1.4 °C/W thermal resistance enables direct PCB copper heatsinking without auxiliary heatsinks in most appliance applications.

Does T1250H-6G-TR require an external snubber circuit?

No - the Snubberless™ architecture eliminates the need for external RC snubber networks in typical universal motor phase-control applications. This is confirmed by its 1500 V/µs dV/dt rating and 21 A/ms (dI/dt)c at 150 °C, both exceeding requirements for snubber-free operation per IEC 61000-4-4.

How does the D2PAK package compare to TO-220AB in thermal performance?

The D2PAK package achieves 1.4 °C/W junction-to-case thermal resistance versus 2.0 °C/W for standard TO-220AB, due to clip-bonding and larger copper area. This allows ~30% higher power dissipation at the same case temperature, enabling smaller PCB footprints in space-constrained designs.

Is T1250H-6G-TR certified for safety standards in end equipment?

Yes - it is UL certified under file E81734 and RoHS compliant (2002/95/EC). The internal 2500 V_rms ceramic insulation meets reinforced isolation requirements, simplifying system-level safety certification for Class I appliances in North America and EU markets.