Professional IC Distribution & Technical Solutions

Manufacturer: BOURNS

Part Number: 4816P-1-102

Specifications:

• Resistance: 1 kΩ (1000 ohms)
• Tolerance: ±1%
• Power Rating: 1 W
• Temperature Coefficient (TCR): ±100 ppm/°C
• Termination Style: Axial Lead
• Operating Temperature Range: -55°C to +155°C
• Construction: Precision Wirewound Resistor
• Flame Retardant Coating: UL94 V-0

Descriptions:

The BOURNS 4816P-1-102 is a high-precision wirewound resistor with a 1 kΩ resistance value and a tight tolerance of ±1%. It is designed for applications requiring stable performance, low noise, and high reliability. The axial lead termination makes it suitable for through-hole PCB mounting.

Features:

• High precision (±1% tolerance)
• Wirewound construction for stability
• 1 W power dissipation
• Flame-retardant coating (UL94 V-0 compliant)
• Wide operating temperature range (-55°C to +155°C)
• Low temperature coefficient (±100 ppm/°C)

This resistor is commonly used in industrial, automotive, and instrumentation applications where accuracy and durability are critical.

# Technical Analysis of Bourns 4816P-1-102 Trimmer Potentiometer

## Practical Application Scenarios

The Bourns 4816P-1-102 is a surface-mount trimmer potentiometer designed for precision adjustment in electronic circuits. Its compact form factor (4.8mm × 6mm) and 1kΩ resistance make it suitable for applications requiring fine-tuning and calibration.

1. Consumer Electronics – Used in audio equipment (e.g., amplifiers, mixers) for gain adjustment and signal conditioning. Its stability under temperature variations ensures consistent performance.

2. Industrial Controls – Integrated into sensor calibration circuits, motor controllers, and feedback systems where resistance adjustments are critical for maintaining accuracy.

3. Medical Devices – Employed in portable diagnostic equipment where space constraints and reliability are paramount.

4. Automotive Systems – Applied in infotainment and climate control modules, where vibration resistance and long-term durability are essential.

The 4816P-1-102’s cermet resistive element provides low noise and high resolution, making it ideal for applications demanding repeatable adjustments.

## Common Design-Phase Pitfalls and Avoidance Strategies

1. Incorrect Power Rating Assumptions

• Pitfall: Exceeding the 0.5W power rating may cause overheating or failure.
• Solution: Verify load conditions and derate power dissipation in high-temperature environments.

2. Poor PCB Layout Practices

• Pitfall: Improper pad sizing or trace routing can lead to mechanical stress or poor solder joints.
• Solution: Follow Bourns’ recommended footprint (per datasheet) and ensure adequate thermal relief.

3. Environmental Sensitivity

• Pitfall: Exposure to moisture or contaminants may degrade performance.
• Solution: Apply conformal coating if used in humid or dusty environments.

4. Mechanical Wear Over Time

• Pitfall: Frequent adjustments may wear the wiper contact, increasing resistance variability.
• Solution: Limit adjustments post-calibration or opt for sealed variants in high-usage scenarios.

## Key Technical Considerations for Implementation

1. Resistance Tolerance – The 4816P-1-102 offers ±10% tolerance; verify circuit sensitivity to resistance variations.

2. Temperature Coefficient – ±100ppm/°C ensures stability but must be accounted for in precision applications.

3. Termination Style – Surface-mount design requires reflow soldering; avoid hand-soldering to prevent thermal damage.

4. Adjustment Lifecycle – Rated for 200 cycles; minimize adjustments in production to extend longevity.

By addressing these factors, designers can optimize the 4816P-1-102’s performance in target applications while mitigating risks.