Power Connectors for Pulse Oximeters
Functional Overview
Pulse oximeters are essential portable medical devices used to monitor blood oxygen saturation (SpO₂) and pulse rate. They require low power, highly stable continuous power supply, compact size, and low leakage current.
Power Connector Technical Requirements
|
Item |
Parameter / Requirement |
|
Power Range |
1W ~ 5W |
|
Voltage Output |
3.3V or 5V (common) |
|
Current Requirement |
Typically 100mA ~ 500mA |
|
Power Supply Mode |
Built-in battery + external USB charging / DC input |
|
Leakage Current |
≤ 10μA, compliant with IEC 60601-1 medical safety standard |
|
Mating Durability |
≥ 5,000 cycles |
|
EMC Performance |
High; to avoid interference with sensitive signal readings |
Recommended Connector Types
|
Connector Type |
Example Series |
Description |
|
Micro USB / USB-C |
Standard USB |
Common for charging/data, user-friendly, widely supported |
|
JST PH / XH Series |
2.0mm / 2.54mm pitch |
Low-current power delivery, reliable, compact |
|
Molex PicoBlade |
1.25mm pitch |
Ultra-compact, ideal for tight internal spaces |
|
FPC/FFC Connectors |
Flat flexible cable connectors |
Space-saving, used in ultra-thin pulse oximeters |
|
φ3.5mm DC Plug |
Miniature DC barrel |
Used for external power input in tabletop models |
Selection Recommendations
- - Choose connectors compliant with IEC 60601-1 medical safety standards
- - Use housing materials with UL94 V-0 flame retardancy and high temperature resistance
- - If patient contact is involved, materials should meet ISO 10993 biocompatibility standards
- - For portable devices, use low-profile, anti-vibration, and anti-misplug connectors
- - Consider IP-rated (dust/water-resistant) designs for enhanced durability in various environments