Board Mount Power Supply Accessories are components designed to facilitate the integration, protection, and optimization of power supply systems on printed circuit boards (PCBs). These accessories ensure reliable electrical connections, thermal management, and electromagnetic compatibility (EMC) in electronic devices. Their importance has grown with advancements in miniaturization, energy efficiency, and high-density computing systems.
| Type | Functional Features | Application Examples |
|---|---|---|
| Power Connectors | High-current transmission, polarization protection, vibration resistance | Servers, industrial automation equipment |
| Heat Sinks | Passive cooling, thermal conduction optimization, airflow compatibility | Power amplifiers, LED lighting systems |
| Fuse Holders | Overcurrent protection, quick-disconnect design, resettable options | Automotive electronics, consumer appliances |
| EMI Filters | High-frequency noise suppression, differential/common-mode filtering | Medical imaging equipment, communication infrastructure |
| Terminal Blocks | Wire-to-board connectivity, screw/clamp termination, color coding | Industrial control panels, HVAC systems |
Typical configurations include:
| Parameter | Description | Importance |
|---|---|---|
| Current Rating | Maximum continuous operating current (1-50A range) | Determines power capacity and trace sizing |
| Dielectric Strength | Withstand voltage (500V-5kV AC) | Ensures electrical safety and insulation reliability |
| Operating Temperature | Functional range (-55 C to +150 C) | Affects performance in harsh environments |
| Thermal Resistance | C/W rating for heat dissipation efficiency | Directly impacts component lifespan |
| Insertion Loss | Signal attenuation at specific frequencies (for EMI filters) | Measures noise suppression effectiveness |
| Manufacturer | Representative Product | Key Features |
|---|---|---|
| TE Connectivity | Power Triple Lock connectors | 3-point contact system, 14A rating |
| CUI Devices | AMM series heat sinks | Multi-finned aluminum design, 20-40 C temperature reduction |
| Littelfuse | POWR-GARD fuse holders | High-rupture capacity, LED fault indication |
| Schurter | FMA12 EMI filter | 12mm slim profile, 250VAC rating |
Key considerations:
Example: Selecting a 40A connector with 20% derating for a 32A power rail in an industrial motor drive.
Emerging developments include:
