Diodes Incorporated T16M50T600B

Overview

T16M50T600B from Lite-On is a 16 A RMS, 600 V bidirectional silicon thyristor (triac) designed for AC power control in phase-angle and zero-crossing switching applications. It features uniform gate trigger currents across all three quadrants (IGT1/IGT2/IGT3 ≤ 50 mA), high dv/dt immunity (≥500 V/μs at 125 °C), and TO-220AB packaging suitable for industrial motor speed control and solid-state relay modules.

For engineers reviewing the T16M50T600B datasheet, T16M50T600B pinout, T16M50T600B application, or T16M50T600B equivalent, key selection criteria include blocking voltage rating, commutating di/dt capability (≥9.0 A/ms), thermal resistance (RthJC = 2.0 °C/W), gate trigger consistency across quadrants, and snubberless operation enabled by high dv/dt immunity.

Technical Context

This triac operates bidirectionally in AC circuits with symmetrical forward/reverse blocking capability (VDRM/VRRM = 600 V). Its gate-triggered conduction supports full-wave phase control, with latching (IL ≤ 80 mA) and holding (IH ≤ 50 mA) currents specified across –40 °C to +125 °C junction temperature range.

Designed for high-noise industrial environments, it sustains ≥500 V/μs critical dv/dt without false triggering at 125 °C and delivers ≥9.0 A/ms commutating di/dt - enabling robust turn-off under inductive load conditions without external snubbers.

Key Specifications

Pinout & Package

Package: TO-220AB - industry-standard insulated plastic package with metal tab (MT2) for direct heatsink mounting; weight 2.0 g; lead-free compliant per RoHS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BTB16-600BW and MAC16A6YG, the T16M50T600B offers superior dv/dt immunity for snubberless operation in noisy industrial settings, while maintaining balanced gate sensitivity and proven thermal derating performance up to 125 °C junction temperature.

Availability

T16M50T600B is available at Aetrix Electronics and suitable for industrial motor control, AC lighting dimming, and solid-state relay modules requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for T16M50T600B 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

Lite-On Semiconductor (LSC) is a Taiwan-based global supplier of discrete semiconductors, optoelectronics, and power management ICs, serving industrial, automotive, and consumer markets since 1975.

The T16M50T600B belongs to Lite-On's high-reliability triac product line, engineered specifically for ruggedized AC power switching in harsh thermal and electrical environments - emphasizing dv/dt robustness, quadrant symmetry, and thermal stability.

FAQ

What is the maximum junction temperature and how does it affect derating?

The T16M50T600B has a maximum junction temperature of +125 °C. Its RMS current rating drops linearly from 16 A at 80 °C case temperature to zero at ~125 °C, per Figure 5. Derating requires monitoring actual case temperature with thermocouple or thermal pad; exceeding TJ(max) risks premature failure due to thermal runaway.

Can this triac be used without a heatsink?

No - at 16 A RMS, power dissipation exceeds 25 W even with low VTM. Without a heatsink, case temperature rapidly exceeds 80 °C, violating the rated IT(RMS). A minimum 2.0 °C/W heatsink (e.g., 100 cm² aluminum finned) is required for continuous operation at full rating.

Is the TO-220AB package electrically insulated?

No - the metal tab (MT2) is electrically connected to Main Terminal 2. Electrical isolation from the heatsink requires an insulating washer and shoulder washer kit (e.g., mica + silicone grease), or use of an isolated-mount TO-220 variant if circuit topology demands floating MT2.

How does three-quadrant triggering improve dimmer performance?

Three-quadrant triggering ensures consistent gate sensitivity in QI (standard forward conduction), QII (reverse voltage with positive gate), and QIII (reverse conduction), enabling symmetrical firing angles on both AC half-cycles. This reduces harmonic distortion, eliminates flicker, and improves EMI profile compared to two-quadrant triacs.