TO-247-3

Q:What defines the physical structure of TO-247-3?

A:Key features include:
- Robust through-hole design: Compatible with high-power applications.
- Central mounting hole: Enables secure heatsink attachment (M3 screw typical).
- 3-pin layout: Straight-line arrangement for simplified wiring.
- Thick lead frame: Typically 0.5–0.8 mm copper alloy for high current handling.

Q:Why choose TO-247-3 over alternatives?

A:Critical advantages:
- Power Handling: Supports currents up to 75A+ (vs. TO-220’s ~30A limit).
- Thermal Performance: Low thermal resistance (<1.5°C/W) with heatsink attachment.
- Electrical Isolation: Optional insulated variants (e.g., TO-247AC) for safety.
- Reliability: Industrial-grade epoxy body withstands high vibration/stress.

Q:What are common technical specs?

A:Standard configurations (consult datasheets):
- Body Size: 16.0×21.0 mm (excluding leads).
- Height: 5.3 mm (base to top of package).
- Pin Pitch: 5.45 mm (center-to-center).
- Material: Copper-alloy leads with molded epoxy body.
- Temp Range: -55°C to +150°C (operational).

Q:Where is TO-247-3 typically applied?

A:Dominant use cases:
- Power Electronics: MOSFETs/IGBTs (e.g., IRFP4668PbF).
- Motor Drives: Inverters for industrial/EV systems.
- Switching Regulators: High-current DC-DC converters.

Q:What are critical assembly guidelines?

A:Key recommendations:
- PCB Design: 2 oz copper traces minimum for high-current paths.
- Heatsink Interface: Use thermal grease (e.g., Dow Corning 340) for optimal heat transfer.
- Mechanical Stress: Avoid bending leads >2 mm from the package body.
- Inspection: Visual check for lead coplanarity (±0.1 mm tolerance).