STMicroelectronics T1035H-6I

Overview

T1035H-6I from STMicroelectronics is a 10 A, 600 V Snubberless™ triac in insulated TO-220AB package, designed for high-temperature AC mains switching with 150 °C max junction turn-off commutation, 35 mA max gate trigger current (IGT), and 2500 V_rms isolation via internal ceramic pad. It enables compact motor control in vacuum cleaners and washing machine drum drives.

For engineers reviewing the T1035H-6I datasheet, T1035H-6I pinout, T1035H-6I application, or T1035H-6I equivalent, key selection criteria include snubberless 3-quadrant commutation capability, thermal resistance R_th(j-c) = 3.4 °C/W, dV/dt immunity ≥1000 V/µs at 150 °C, and UL certification (E81734) for safety-critical appliance designs.

Technical Context

This triac operates without external snubbers across all four quadrants, leveraging optimized gate structure and low dynamic resistance (R_d = 34 mΩ at 150 °C) to sustain high dI/dt (50 A/µs) and critical commutation (dI/dt)_c ≥13 A/ms at 150 °C. Its 2500 V_rms isolation meets reinforced insulation requirements for Class I appliances.

The device uses clip-bonding for low thermal resistance and supports full-sine-wave RMS currents up to 10 A at case temperatures ≤125 °C. Leakage current remains ≤3.6 mA at 150 °C and 600 V blocking, enabling stable operation in thermally constrained enclosures.

Key Specifications

Pinout & Package

TO-220AB Insulated package with electrically isolated metal tab (ceramic pad), UL certified (E81734), RoHS compliant, and ECOPACK® qualified. Mounting torque: 0.4–0.6 N·m.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BTB10-600CW and T1035H-6T, the T1035H-6I trades slightly higher R_th(j-c) for integrated isolation, eliminating insulating hardware and enabling direct chassis mounting-critical for Class I portable appliance approvals.

Availability

T1035H-6I is available at Aetrix Electronics and suitable for vacuum cleaner motor control, washing machine drum drive, and industrial fan speed regulation requiring stable component supply, long-lifecycle support, and UL-certified reliability.

Supply support for T1035H-6I 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, delivering silicon solutions for automotive, industrial, and consumer markets since 1987.

The T10xxH series belongs to ST's high-temperature Snubberless™ triac product line, engineered specifically for compact, high-power-density AC motor control in thermally aggressive environments like sealed appliance housings.

FAQ

What is the maximum allowable case temperature for continuous 10 A RMS operation?

The T1035H-6I supports 10 A RMS continuous current at T_c ≤125 °C, as specified in Table 2. Exceeding this requires derating per Figure 2; at 135 °C case temperature, maximum RMS current drops to 8.5 A. Thermal design must maintain case temperature below 125 °C under worst-case ambient and airflow conditions.

Does the 2500 V_rms isolation rating apply to DC or AC voltage stress?

The 2500 V_rms isolation rating is an AC withstand voltage per IEC 60747-10, verified at 50 Hz for 1 minute. It does not imply DC rating; for DC stress, refer to the 600 V V_DRM/V_RRM rating. The ceramic pad ensures reinforced insulation between tab and die, critical for Class I appliance safety compliance.

Can T1035H-6I replace T1035H-6T in existing designs without layout changes?

No-T1035H-6I has identical outline dimensions but requires no insulating hardware due to its isolated tab, whereas T1035H-6T mandates a mica washer or silicone pad. Layout changes are needed only if the original design relied on that insulator for creepage; otherwise, mounting hole pattern and footprint remain compatible.

What gate drive circuitry is recommended for reliable triggering at 150 °C junction temperature?

Use a gate driver capable of delivering ≥50 mA peak current for ≥10 µs into ≤100 Ω impedance. At 150 °C, I_GT increases by ~2.5× versus 25 °C (per Figure 8); thus, a 35 mA-rated gate signal at room temperature must scale to ≥88 mA at full temperature to ensure margin. Optocouplers with I_F ≥10 mA and CTR ≥100% are preferred.