DO-9

Q:What defines the physical structure of DO-9?

A:Key features include:
- Leaded glass encapsulation: Hermetic sealing for environmental protection.
- Cylindrical metal body: Diameter of 8.6 mm with axial leads.
- 9-pin configuration: Pins arranged in a single-row radial layout.
- Compact profile: Typical height of 14.5 mm (including leads).

Q:Why choose DO-9 over alternatives?

A:Critical advantages:
- Robustness: Hermetic glass-metal sealing resists moisture and corrosion.
- Thermal Stability: Handles high temperatures (up to +150°C).
- Electrical Isolation: Low leakage current due to glass insulation.
- Longevity: Proven reliability in harsh environments (e.g., industrial, automotive).

Q:What are common technical specs?

A:Standard configurations (consult datasheets):
- Body Diameter: 8.6 mm
- Height: 14.5 mm (including leads)
- Pin Pitch: 2.54 mm (radial spacing)
- Material: Kovar alloy body with glass seals
- Temperature Range: -55°C to +150°C

Q:Where is DO-9 typically applied?

A:Dominant use cases:
- High-voltage diodes: Rectifiers, Zener diodes (e.g., 1N4007).
- Industrial sensors: Pressure/thermal sensors in harsh environments.
- Aerospace electronics: Hermetic packaging for avionics systems.

Q:What are critical assembly guidelines?

A:Key recommendations:
- PCB Layout: Ensure ≥3 mm clearance for high-voltage isolation.
- Handling: Avoid bending axial leads repeatedly to prevent glass cracking.
- Soldering: Wave soldering preferred (max 260°C for 5 sec).
- Inspection: Visual check for glass seal integrity post-assembly.