Product Overview
Westinghouse Trade Number 330 Indicator Light Bulb, SX6s Base
Condition
Unused new old stock (NOS). Markings legible: WESTINGHOUSE # 330. Glass envelope and filament are intact with clean SX6s midget flanged base and center contact terminal. Sold each.
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Product Overview
Standard T-1 3/4 midget flanged indicator lamp engineered for 14-volt electrical systems, Westinghouse part number 330 delivers localized illumination across aviation panels, military avionics, and industrial annunciators. Built with a rugged C-2F filament and an SX6s midget flange base, it mounts into compact optical assemblies and switch indicators.
Key Features
- T-1 3/4 subminiature glass envelope (5.5 mm diameter)
- SX6s single-contact midget flanged base
- 14.0 V rated operating voltage at 0.08 A (80 mA)
- C-2F ruggedized filament construction
- 0.50 MSCP nominal light output
- 1,500-hour average rated service life
- Interchanges with military standard MS25237-330 and CM330
Applications
- Aircraft cockpit annunciator panels and compass lighting
- Industrial machinery status indicators and illuminated pushbuttons
- Vintage test equipment, radio dial illumination, and custom instrument builds
Frequently Asked Questions
What base style does this lamp use?
This bulb uses an SX6s single-contact midget flanged base, featuring a metal sleeve with a projecting seating flange and a single bottom solder contact.
What military part number does the 330 lamp cross-reference?
Trade number 330 directly cross-references to military specification MS25237-330.
How does the 330 differ from the look-alike 327 indicator lamp?
While both share the T-1 3/4 midget flanged base, the 330 operates at 14.0 volts and 80 mA, whereas the 327 is rated for 28.0 volts and 40 mA.
A tiny flanged beacon from the days when cockpit annunciators ran on honest tungsten and 14 volts. Seat it into the panel and bring the indicator back to life.
