BTA40AB Technical Summary

BTA40AB Triac Technical Summary

Overview

The BTA40 A/B series are high-performance triacs designed for robust switching applications in AC circuits. These components belong to the family of bidirectional thyristors, capable of conducting current in both directions when triggered. The BTA40AB variant offers excellent thermal performance and high commutation capability, making it suitable for demanding industrial and consumer applications.

With voltage ratings ranging from 400V to 800V, the BTA40AB provides designers with flexibility for various line voltage requirements. The component features a sensitive gate for low triggering current requirements while maintaining high noise immunity against false triggering.

Key Features

High voltage ratings: 400V, 600V, 700V, and 800V options available
High current capability: 40A RMS on-state current
Low gate trigger current (IGT) for easy drive requirements
High commutation capability (dv/dt)
Planar passivated for enhanced reliability
Isolated package option available (BTA40AB)
Designed for high noise immunity
UL recognition pending (file E69938)
RoHS compliant

Applications

The BTA40AB is designed for a wide range of AC switching applications, including:

Industrial controls and automation systems
Motor control circuits
Lighting control (dimmers, ballasts)
Heating control systems
AC power switches
Solid-state relays
Home appliances (washing machines, refrigerators)
Power tools

Electrical Characteristics

Absolute Maximum Ratings

Repetitive peak off-state voltage (VDRM/VRRM): 400V to 800V (depending on variant)
RMS on-state current (IT(RMS)): 40A
Non-repetitive peak on-state current (ITSM): 400A (10ms sine wave)
Gate trigger current (IGT): 35mA max
Gate trigger voltage (VGT): 1.5V max
Critical rate of rise of off-state voltage (dv/dt): 1000V/μs min
Operating junction temperature range (Tj): -40°C to +125°C

Thermal Characteristics

Junction-to-case thermal resistance (Rth(j-c)): 1.4°C/W
Junction-to-ambient thermal resistance (Rth(j-a)): 60°C/W
Storage temperature range (Tstg): -40°C to +150°C

Package Information

The BTA40AB is available in two package options:

TO-220AB Package (Non-Isolated)

Package type: Through-hole mounting
Dimensions: 10.4mm x 4.6mm x 15.75mm
Weight: approximately 2.3g
Terminal material: Copper alloy
Mounting torque: 0.5 N·m max

TO-220AB Insulated Package (Isolated)

Package type: Through-hole mounting with isolation
Isolation voltage: 2500V RMS
Dimensions: 10.4mm x 4.6mm x 15.75mm
Weight: approximately 2.5g
Terminal material: Copper alloy
Mounting torque: 0.5 N·m max

Performance Characteristics

Switching Performance

The BTA40AB exhibits excellent switching characteristics with:

Turn-on time (ton): 2μs typical
Turn-off time (toff): 100μs typical
Critical rate of rise of on-state current (di/dt): 50A/μs

Thermal Performance

The component's thermal design ensures reliable operation under high load conditions:

Maximum power dissipation: 100W at Tc = 25°C
Derating factor: 0.8W/°C above 25°C
Recommended heatsink thermal resistance: <2°C/W for full current operation

Reliability Data

Mean Time Between Failures (MTBF): >1,000,000 hours at 40°C
Qualification tests performed: MIL-STD-750
Environmental tests passed: Moisture resistance (85°C/85% RH), temperature cycling, mechanical shock