1. Define Technical Requirements
Pin count, coding type, and current/voltage rating.
IP rating for dustproof/waterproof performance (IP67, IP68).
Mechanical durability: mating cycles, vibration resistance.
2. Evaluate Supplier Capabilities
Certifications (UL, IEC, RoHS, MIL-SPEC where needed).
Testing and quality assurance processes.
Ability to customize pin coding, over-molding, or special housings.
Responsiveness: lead times, sample availability, technical support.
3. Compare Cost vs Reliability
Balance price against long-term reliability and service, and consider after-sales support and spare part availability.