STMicroelectronics TYN816RG

Overview

TYN816RG from STMicroelectronics is a 16 A, 800 V RMS standard silicon-controlled rectifier (SCR) in TO-220AB package, with 25 mA gate trigger current, 1.6 V on-state voltage at 32 A, and 50 A/µs critical dI/dt rating. It is designed for AC power control in industrial motor starters, lighting dimmers, and solid-state relays.

For engineers reviewing the TYN816RG datasheet, TYN816RG pinout, TYN816RG application, or TYN816RG equivalent, key selection criteria include VDRM/VRRM = 800 V, IT(RMS) = 16 A, IGT = 25 mA, thermal resistance Rth(j-c) = 1.1 °C/W, and TO-220AB mechanical compatibility with heatsink mounting.

Technical Context

This SCR operates as a unidirectional latching switch triggered by a gate pulse, sustaining conduction until current falls below the holding threshold (IH ≤ 40 mA). Its 200 A non-repetitive surge rating (tp = 8.3 ms) supports high-inrush load switching, while dV/dt immunity ≥ 500 V/µs prevents false triggering in noisy AC line environments.

The device uses clip-assembly construction to enhance surge robustness and thermal performance. Junction-to-case thermal resistance of 1.1 °C/W enables reliable operation at Tc = 110 °C with IT(AV) = 10 A, and its ECOPACK® lead-free packaging complies with JEDEC JESD97 marking standards.

Key Specifications

Pinout & Package

Package: TO-220AB - insulated case, single-ended vertical mounting, screw-terminal compatible (recommended torque: 0.4–0.6 N·m), UL94 V0 epoxy, ECOPACK® lead-free second-level interconnect.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BT138-800 and TYN616RG, TYN816RG delivers higher surge robustness (200 A vs. 150 A), superior thermal performance (1.1 °C/W vs. 1.5 °C/W), and broader 230 VAC system compatibility due to its 800 V blocking rating.

Availability

TYN816RG is available at Aetrix Electronics and suitable for industrial motor starters, AC lighting dimmers, solid-state relays, and heating element controllers requiring stable component supply across multi-year production cycles.

Supply support for TYN816RG 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, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The TYNx16 series belongs to ST's standard SCR product line, engineered for cost-effective, robust AC power control in non-safety-critical industrial equipment where high surge tolerance and thermal reliability are essential.

FAQ

What is the maximum junction temperature for continuous operation?

The TYN816RG has an operating junction temperature range of –40 °C to +125 °C. For continuous conduction, thermal design must ensure Tj does not exceed +125 °C under worst-case ambient and load conditions, using Rth(j-c) = 1.1 °C/W and case temperature monitoring at Tc = 110 °C.

Can TYN816RG be used in DC switching applications?

Yes, but only with external commutation - the TYN816RG is a semi-controlled rectifier that latches ON until main current falls below IH (≤40 mA). In DC circuits, forced current interruption (e.g., via auxiliary switch or LC snubber) is required to reset conduction, unlike fully controllable devices like IGBTs.

Is heatsinking mandatory for rated 16 A RMS operation?

Yes. At IT(RMS) = 16 A and Tc = 110 °C, the device dissipates ~25 W (based on VTM ≈ 1.6 V and conduction angle). Without a heatsink, ambient-limited operation drops to <2 A. A properly sized aluminum heatsink with thermal interface material is required to maintain Tc ≤ 110 °C.

Does TYN816RG have built-in overvoltage protection?

No. The device has no integrated transient voltage suppression. External protection - such as a parallel metal-oxide varistor (MOV) rated ≥1000 VAC or RC snubber network - is required to clamp line surges exceeding its 800 V VDRM rating and prevent destructive dv/dt-induced turn-on.