STMicroelectronics T410-800H

Overview

T410-800H from STMicroelectronics is a 4 A, 800 V RMS three-quadrant logic-level triac in IPAK package, designed for direct gate drive from microcontrollers without external amplification. It delivers high commutation performance on inductive AC loads, with guaranteed max IGT of 10 mA, dV/dt immunity of 40 V/µs at 125 °C, and ITSM surge rating of 31 A (60 Hz, 16.7 ms), enabling robust motor control in power tools and kitchen appliances.

For engineers reviewing the T410-800H datasheet, T410-800H pinout, T410-800H application, or T410-800H equivalent, this part is selected for snubberless AC switching where low gate drive current, high junction temperature operation (up to +125 °C), and reliable turn-off under inductive load conditions are critical design requirements.

Technical Context

The T410-800H implements ST's Snubberless logic-level triac architecture, supporting triggering in all three quadrants (I, II, III) with symmetrical gate sensitivity. Its dI/dt rating of 50 A/µs (at Tj = 125 °C, IG = 2×IGT) and (dV/dt)c of 40 V/µs ensure stable commutation without external snubbers across universal motor and solenoid loads.

Thermal design is enabled by Rth(j-c) = 2.6 °C/W (IPAK), allowing 4 A RMS conduction at Tc = 110 °C. The device operates over -40 to +125 °C junction range and features halogen-free, lead-free ECOPACK® compliance per ST's environmental program.

Key Specifications

Pinout & Package

Package: IPAK (TO-251AA), insulated tab, halogen-free epoxy, lead-free, ECOPACK® compliant. Dimensions per Table 8: D = 6.0–6.20 mm, E = 6.40–6.65 mm, H = 16.10 mm, L = 9.0–9.60 mm, weight = 0.4 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with T410-800T and T410-800B, the T410-800H offers identical electrical performance with an insulated IPAK package-providing safe, low-profile through-hole mounting and simplified thermal interface for mid-power industrial and appliance modules.

Availability

T410-800H is available at Aetrix Electronics and suitable for universal motor control, electrovalve actuation, kitchen appliance loads, and small home appliance controls requiring stable component supply across long-lifecycle production programs.

Supply support for T410-800H 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 silicon solutions for automotive, industrial, and consumer markets since 1987.

The T4 series triacs were developed specifically for snubberless, logic-level AC switching in cost-sensitive, thermally constrained appliances and power tools-emphasizing gate sensitivity, commutation robustness, and environmental compliance.

FAQ

What is the maximum junction temperature for continuous operation of the T410-800H?

The T410-800H is rated for continuous operation with a maximum junction temperature of +125 °C, as confirmed in Table 3 of the official datasheet (DocID7699 Rev 9). This rating applies under specified thermal conditions including Tc = 110 °C and IT(rms) = 4 A, and is validated across all electrical parameters in Table 4.

Does the T410-800H require a snubber circuit for inductive loads?

No-T410-800H is explicitly characterized as a "Snubberless" triac. Its minimum dV/dt rating of 40 V/µs at 125 °C and (dI/dt)c of 2.7 A/ms (Table 4) enable reliable commutation on typical inductive loads (e.g., universal motors, solenoids) without external RC snubbers under normal operating conditions.

Can the T410-800H be driven directly from a 3.3 V microcontroller GPIO?

Yes. With VGT(max) = 1.3 V and IGT(max) = 10 mA at 25 °C (Table 4), the T410-800H is fully compatible with 3.3 V logic outputs. A series current-limiting resistor (e.g., 330 Ω) ensures gate current remains within spec while providing noise margin and transient protection.

What is the thermal resistance from junction to case (Rth(j-c)) for the IPAK package?

The junction-to-case thermal resistance for the T410-800H in IPAK package is 2.6 °C/W, as specified in Table 6 of the datasheet. This value is measured under AC conditions and applies to both insulated and non-insulated variants of the IPAK outline, enabling accurate heatsink sizing for 4 A RMS conduction.