BTA40AB
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
Design Considerations
Gate Drive Requirements
For reliable triggering, the following design guidelines should be followed:
- Minimum gate current: 50mA recommended for all temperature conditions
- Gate pulse width: >20μs for resistive loads, >50μs for inductive loads
- Gate resistor value: 100Ω to 1kΩ typically
Snubber Circuit Design
For inductive load applications, a properly designed snubber circuit is recommended:
- Typical snubber values: 100nF capacitor with 100Ω resistor in series
- Snubber power rating: 1W minimum
- Placement: As close to the triac terminals as possible
Ordering Information
The BTA40AB is available in different voltage ratings and package options:
- BTA40-400B: 400V version, isolated package
- BTA40-600B: 600V version, isolated package
- BTA40-700B: 700V version, isolated package
- BTA40-800B: 800V version, isolated package
- Non-isolated versions available with "A" suffix (e.g., BTA40-400A)
Compliance and Certifications
- RoHS compliant
- REACH compliant
- UL recognition pending (file E69938)
- IEC 60747 standards compliant
