Product Overview
This manual provides detailed instructions for the Bourns 95A2A-B28-A10/A10L Cermet Potentiometer. This component is a single-turn, 1K Ohm, 1W cermet potentiometer designed for panel mounting with solder lug terminals. It is suitable for various electronic applications requiring precise resistance adjustment.
The image displays the Bourns 95A2A-B28-A10/A10L Cermet Potentiometer, showing its blue body, metal shaft, and three solder lug terminals. The component is designed for panel mounting.
Key Features
- Resistance: 1K Ohm
- Power Rating: 1 Watt
- Tolerance: 10%
- Turns: 1 Electrical / 1 Mechanical
- Shaft Diameter: 6.35mm
- Dimensions: Approximately 45.09mm x 15.88mm x 22.55mm
- Mounting Type: Panel Mount
- Termination Style: Solder Lug
- Element Type: Cermet
Setup and Installation
Proper installation is crucial for optimal performance and longevity of the potentiometer.
Mounting
The 95A2A-B28-A10/A10L is designed for panel mounting.
- Ensure the mounting hole on the panel is appropriately sized for the potentiometer's bushing. Refer to the mechanical specifications for precise dimensions.
- Insert the potentiometer shaft through the panel hole.
- Secure the potentiometer using the provided nut and washer on the front side of the panel. Tighten firmly but do not overtighten to avoid damaging the component or panel.
Electrical Connections
The potentiometer has three solder lug terminals.
- Terminal 1 (Counter-Clockwise End): Connect to one end of the circuit where resistance is desired.
- Terminal 2 (Wiper): Connect to the point where variable resistance is needed.
- Terminal 3 (Clockwise End): Connect to the other end of the circuit.
Note: For variable resistor (rheostat) applications, connect the wiper (Terminal 2) to either Terminal 1 or Terminal 3, and use the remaining two terminals.
Use appropriate soldering techniques to ensure secure and reliable electrical connections. Avoid excessive heat which can damage the internal components.
Operating Instructions
The Bourns 95A2A-B28-A10/A10L is a single-turn potentiometer.
- Rotation: The shaft can be rotated approximately 270-300 degrees from one end stop to the other.
- Resistance Adjustment: Rotating the shaft changes the resistance between the wiper terminal and the end terminals.
- Clockwise Rotation: Typically increases resistance between Terminal 1 and Terminal 2, and decreases resistance between Terminal 2 and Terminal 3.
- Counter-Clockwise Rotation: Typically decreases resistance between Terminal 1 and Terminal 2, and increases resistance between Terminal 2 and Terminal 3.
Always ensure the circuit is de-energized before making or changing connections.
Maintenance
The Bourns cermet potentiometer is a robust component designed for long-term reliability with minimal maintenance.
- Cleaning: If the external surfaces become dirty, gently wipe with a clean, dry, lint-free cloth. Avoid using solvents or abrasive cleaners.
- Inspection: Periodically inspect the solder connections for any signs of corrosion or loosening. Ensure the mounting nut remains secure.
- Environmental Conditions: Operate and store the potentiometer within specified temperature and humidity ranges to prevent degradation.
Do not attempt to disassemble the potentiometer, as this will void any warranty and may damage the component.
Troubleshooting
If you encounter issues with the potentiometer, consider the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No resistance change | Incorrect wiring; Open circuit; Damaged wiper. | Verify wiring connections; Check for continuity across terminals; Replace potentiometer if damaged. |
| Intermittent resistance | Loose connections; Contamination inside element; Worn element. | Resolder connections; Replace potentiometer. |
| Resistance value out of specification | Component tolerance; Environmental factors; Damaged element. | Verify against specifications; Ensure proper operating conditions; Replace if damaged. |
| Shaft difficult to turn | Overtightened mounting nut; Mechanical damage. | Loosen mounting nut slightly; Replace if mechanically damaged. |
Specifications
Detailed technical specifications for the Bourns 95A2A-B28-A10/A10L Cermet Potentiometer.
| Parameter | Value |
|---|---|
| Model Number | 95A2A-B28-A10/A10L |
| Resistance | 1K Ohm |
| Power Rating | 1 Watt |
| Resistance Tolerance | ±10% |
| Taper | Linear |
| Number of Turns | 1 (Electrical) / 1 (Mechanical) |
| Shaft Diameter | 6.35 mm |
| Dimensions (L x W x H) | 45.09 mm x 15.88 mm x 22.55 mm (approx.) |
| Mounting Type | Panel Mount |
| Termination Style | Solder Lug |
| Element Material | Cermet |
| Operating Temperature Range | (Refer to Bourns datasheet for specific range) |
| Manufacturer | Bourns |
Warranty and Support
For specific warranty information and technical support regarding the Bourns 95A2A-B28-A10/A10L Cermet Potentiometer, please refer to the official Bourns website or contact their customer service directly.
Note: Warranty terms may vary based on region and distributor. Always retain your proof of purchase.
Manufacturer: Bourns
