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STMicroelectronics BTB16-800CWRG — Discrete Semiconductors

STMicro BTB16-800CWRG Triac, 800V 16A TO-220 Snubberless

MPNBTB16-800CWRG
Active

STMicroelectronics Snubberless™ series, BTB16-800CWRG, Alternistor triac, 800 V off-state, 16 A RMS on-state, TO-220-3 through-hole, -40°C to 125°C.

$1.8300Ref. price · indicative, final on quote
STMicroelectronics BTB16-800CWRG datasheet (PDF)
PackagingTO-220-3
RoHSROHS3 Compliant
SeriesSnubberless™
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

BTB16-800CWRG specifications
ParameterValue
SeriesSnubberless™
Triac typeAlternistor - Snubberless
MountingThrough Hole
Voltage - off state800 V
Voltage - gate trigger (Vgt)1.3 V
Current - hold (Ih)35 mA
Current - gate trigger (Igt)35 mA
Current - on state (It (RMS))16 A
Current - non rep. surge 50, 60Hz160A, 168A
Operating temperature-40°C ~ 125°C (TJ)
PackageTube
ConfigurationSingle
CaseTO-220-3

Product details

16 A Snubberless Alternistor for Inductive Loads

The STMicroelectronics BTB16-800CWRG is an Alternistor - Snubberless triac rated for 800 V off-state voltage and 16 A RMS on-state current in a TO-220 through-hole package. This part is from the Snubberless™ series, designed for high dv/dt immunity.

Parametric Fit: Surge, Gate Drive, and Temperature

The 16 A RMS rating sets the continuous load ceiling. The 160 A / 168 A non-repetitive surge capability handles start-up spikes. Gate trigger current is 35 mA max with a 1.3 V max gate trigger voltage. This is a standard logic-level drive — a microcontroller GPIO through a transistor or optocoupler can fire it directly. The 35 mA hold current means the triac latches on once triggered and only turns off when the load current drops below that threshold near the AC zero-cross. At 125°C junction, the on-state current must be derated per the datasheet curve.

The base product number is BTB16, which covers multiple voltage and sensitivity grades in the same TO-220 footprint.

Frequently asked questions

What is a snubberless triac and why does this part use that design?

A snubberless triac is designed to withstand high rates of voltage rise (dv/dt) without false triggering, eliminating the need for an external RC snubber network. The BTB16-800CWRG uses the Snubberless™ alternistor structure specifically to switch inductive loads — motors, transformers, solenoids — where a standard triac would commutate falsely without the snubber.

What is the difference between an alternistor and a standard triac?

An alternistor triac uses a different internal structure that provides higher dv/dt immunity and better commutation performance on inductive loads compared to a standard triac. The BTB16-800CWRG is an Alternistor - Snubberless type, meaning it can switch inductive loads without a snubber circuit, whereas a standard triac would typically require one to prevent false triggering during turn-off.