BTA41 insulated-tab triac pinout

The BTA41 is a standard four-quadrant triac in an insulated TOP3 package. Its gate drive is referenced to A1.

TOP3 insulated

3 contacts Current package

STMicroelectronics · Insulated mounting tab with three through-hole leads.

600 V repetitive peak off-state rating.

TOP3 insulated

Marked front facing you with the leads down: A1, A2, G from left to right.

Main terminal · Bidirectional

Main terminal 1. Use it as the reference for the gate circuit.

STMicroelectronics DS2111 Rev. 13, package illustration

Pin	Signal	Direction	Function
1	A1 Main terminal	Main terminal	Main terminal 1. Use it as the reference for the gate circuit.
2	A2 Main terminal	Main terminal	Main terminal 2. Its polarity relative to A1 determines one axis of the triggering quadrant.
3	G Input	Input	Gate. Use a resistor to control trigger current and reference its drive to A1.

Quadrant I has both A2 and the gate positive relative to A1. Trigger requirements change with quadrant and junction temperature.

Parameter	Limit	Conditions and source
Repetitive peak off-state voltage600 V	600 V	VDRM / VRRM for the selected order code. STMicroelectronics DS2111 Rev. 13, Ordering Information
Gate trigger current50 mA max in I/II/III · 100 mA max in IV	50 mA max in I/II/III · 100 mA max in IV	At TJ = 25 °C, VD = 12 V and RL = 33 Ω. STMicroelectronics DS2111 Rev. 13, Table 2
Holding current80 mA maximum	80 mA maximum	At a 500 mA test current and TJ = 25 °C. STMicroelectronics DS2111 Rev. 13, Table 2
Latching current70 mA max in I/III/IV · 160 mA max in II	70 mA max in I/III/IV · 160 mA max in II	Specified at IG = 1.2 × IGT and TJ = 25 °C. STMicroelectronics DS2111 Rev. 13, Table 2
RMS on-state current40 A	40 A	At 180° conduction and a controlled 80 °C case. Heat removal determines allowable load current. STMicroelectronics DS2111 Rev. 13, Table 1

BTA41-600BRG and BTA41-800BRG share the insulated TOP3 pinout. The fixture below uses an isolated, current-limited DC supply.

STMicroelectronics DS2111 Rev. 13· Insulated TOP3 drawing, characteristics and ordering information.
Source register· Document revisions, applicable order codes, consulted sections and available file checksums.