SPST-NO

Q:What defines the physical structure of SPST-NO?

A:Key features include:
- Compact Form Factor: Leadless design with bottom-mounted terminals.
- Actuation Interface: Integrated actuator pad (e.g., 2.5×2.5 mm contact area).
- Terminal Layout: Dual-pin configuration (NO and common terminals).
- Low Profile: Typically ≤1.2 mm thickness for space-constrained designs.

Q:Why choose SPST-NO over alternatives?

A:Critical advantages:
- Miniaturization: 40% smaller than traditional mechanical switches.
- Reliability: Sealed construction (IP67-rated for dust/moisture resistance).
- Electrical Simplicity: Low-contact-resistance (<50 mΩ) for signal integrity.
- Durability: Rated for >100,000 mechanical cycles.

Q:What are common technical specs?

A:Standard configurations (consult datasheets):
- Body Size: 3.0×2.0 mm (varies by manufacturer).
- Height: 1.2 mm max.
- Terminal Pitch: 1.5 mm spacing.
- Material: Gold-plated contacts with PBT housing.
- Temp Range: -40°C to +85°C (industrial grade).

Q:Where is SPST-NO typically applied?

A:Dominant use cases:
- Consumer Electronics: Tactile switches in wearables (e.g., smartwatch buttons).
- Automotive: Door/window sensor triggers (e.g., Toyota Tundra seat sensors).
- Medical Devices: Disposable equipment activation (e.g., insulin pump switches).

Q:What are critical assembly guidelines?

A:Key recommendations:
- PCB Design: Ensure pad alignment with actuator travel distance (±0.1 mm tolerance).
- Solder Paste: Use SAC305 alloy (Type 3 recommended).
- Reflow Profile: Peak temp ≤ 260°C (avoid thermal stress on plastic housing).
- Inspection: Visual inspection for actuator alignment; electrical continuity test post-assembly.