TO92

Q:What defines the physical structure of TO92?

A:Key features include:
- 3-pin inline layout: Pins arranged linearly for easy through-hole mounting.
- Compact epoxy body: Typically measures 4.5×4.0 mm (L×W) with a rounded shape.
- Standard lead spacing: 2.54 mm (0.1-inch) pitch between pins.
- Lightweight design: Weighs < 0.2 grams, suitable for low-stress applications.

Q:Why choose TO92 over alternatives?

A:Critical advantages:
- Cost-effective: ~30% cheaper than SMD equivalents (e.g., SOT-23).
- Simplified assembly: Manual or wave soldering compatible.
- Proven reliability: Robust epoxy encapsulation resists humidity and mechanical stress.
- Broad compatibility: Widely used in legacy and low-power designs.

Q:What are common technical specs?

A:Standard configurations (consult datasheets):
- Body Size: 4.5×4.0 mm (varies by manufacturer).
- Pin Length: ~10–15 mm (pre-tinned leads).
- Material: Epoxy body with copper-alloy leads.
- Temp Range: -55°C to +150°C (industrial grade).
- Power Rating: Up to 500 mW (depends on device).

Q:Where is TO92 typically applied?

A:Dominant use cases:
- Discrete semiconductors: Transistors (e.g., 2N3904), voltage regulators.
- Sensors: Temperature sensors (e.g., LM35), hall-effect devices.
- Low-power analog: Op-amps, small-signal diodes.

Q:What are critical assembly guidelines?

A:Key recommendations:
- PCB Design: Ensure 2.54 mm hole spacing; avoid bending pins repeatedly.
- Soldering: Wave soldering at 260°C max (5 sec exposure).
- Handling: Protect leads from mechanical stress during insertion.
- Inspection: Visual check for lead alignment and epoxy cracks.