The Welch Allyn 25020A is a screw-base indicator lamp engineered as a replacement component for Welch Allyn diagnostic instruments. Operating at 2.5V and 0.37W, this TL1.5 bulb delivers the focused illumination required for precise clinical examination and diagnosis. The lamp integrates directly into compatible Welch Allyn diagnostic heads, maintaining optical and electrical performance across a range of medical examination platforms.
Technical Specifications
• Voltage: 2.5V
• Wattage: 0.37W
• Bulb Shape: TL1.5
• Base Type: Screw Base
• Lamp Type: Indicator Lamp
– Key Features
The TL1.5 form factor provides compact, consistent light output in a standardized envelope. The screw base design enables tool-free installation and removal, reducing downtime during routine maintenance. Low wattage consumption minimizes thermal load on instrument electronics and extends operational life.
– Typical Applications
The 25020A serves as an illumination source in Welch Allyn diagnostic instruments where indicator lighting is critical to proper device operation. It supports visual feedback during examination procedures and helps ensure medical professionals maintain full visibility throughout patient assessment.
– Compatibility & Integration
The 25020A is designed to meet exact electrical and mechanical specifications required by compatible Welch Allyn diagnostic platforms. Its 2.5V rating distinguishes it from higher-voltage halogen lamp systems, such as the 3.5V 03100 halogen lamp used in otoscope models. Direct replacement capability ensures consistent performance when integrated into the original equipment architecture.












