PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

77A/S8-12VLamp,incandescent

Chicago Miniature Lighting Llc Dba Chicago Miniature Optoelectron · NSN 6240-01-186-2033 · FSC 6240 · No Item Name Available
Verified by PartsTable
NSN 6240-01-186-2033 — this item is cataloged by the U.S. Government under National Stock Number 6240-01-186-2033. Primary manufacturer part number: 77A/S8-12V.
Features
  • Lamp,incandescent — FSC 6240
  • Bulb Style: RP (ARBITRARY DESIGNATION)
  • Current Rating for Which Designed: 0.770 AMPERES MAXIMUM
  • Emitted Light Characteristic: NATURAL
  • Bulb Light Transmission Characteristic: TRANSPARENT
  • Base Style: SINGLE CONTACT CANDELABRA PREFOCUS
  • Filament Heavy Duty Service Rating: NOT RATED
  • Light Output Rating: 120.000 LUMENS MAXIMUM SINGLE RATING
Applications
  • Area illumination
  • Indicator and warning display
  • Navigation and signal lighting
General Description

The Lamp,incandescent, cataloged under National Stock Number 6240-01-186-2033, is classified within Federal Supply Class 6240 (No Item Name Available) of the Lighting Fixtures and Lamps group. The primary manufacturer of record is Chicago Miniature Lighting Llc Dba Chicago Miniature Optoelectron. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6240-01-186-2033
Primary Part Number77A/S8-12V
Item NameLamp,incandescent
FSC / FSG6240 / 62 — No Item Name Available
ManufacturerChicago Miniature Lighting Llc Dba Chicago Miniature Optoelectron
StatusACTIVE
Bulb StyleRP (ARBITRARY DESIGNATION)
Current Rating for Which Designed0.770 AMPERES MAXIMUM
Emitted Light CharacteristicNATURAL
Bulb Light Transmission CharacteristicTRANSPARENT
Base StyleSINGLE CONTACT CANDELABRA PREFOCUS
Filament Heavy Duty Service RatingNOT RATED
Light Output Rating120.000 LUMENS MAXIMUM SINGLE RATING
Average Life Rating in Hours1000.0
Bulb DesignatorRP11
Rated Average LifeHOURS
Voltage Rating12.000 VOLTS NOMINAL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
6240-00-156-160777AS8-12V INTERCHANGEABLE
Lamp,incandescent
Lamp Industry for Use with Industry Designations and Abbreviations for Lamps
Cross-Reference Index
Part NumberManufacturer
77A/S8-12V PRIMARY Chicago Miniature Lighting Llc Dba Chicago Miniature Optoelectron (USA)
77A/S8-12V Philips Electronics North America Corporation Dba Philips Lighting Div Philips Lighting Company (USA)
Related Parts
6240-00-156-1607INTERCHANGEABLE
LAMP,INCANDESCENT
77AS8-12V

Frequently Asked Questions

What is NSN 6240-01-186-2033?

NSN 6240-01-186-2033 is a Lamp,incandescent, manufactured by Chicago Miniature Lighting Llc Dba Chicago Miniature Optoelectron, classified under FSC 6240 (No Item Name Available). Status: active.

What are the part numbers for NSN 6240-01-186-2033?

NSN 6240-01-186-2033 has 2 cross-referenced part numbers: 77A/S8-12V (Chicago Miniature Lighting Llc Dba Chicago Miniature Optoelectron), 77A/S8-12V (Philips Electronics North America Corporation Dba Philips Lighting Div Philips Lighting Company).

What NSN replaces 6240-01-186-2033?

There is 1 known substitute for 6240-01-186-2033: 6240-00-156-1607. Verify interchangeability with system specifications before substitution.

What are the specifications of 77A/S8-12V?

Key specifications for 77A/S8-12V: Overall Length: 1.875 INCHES NOMINAL IN; Bulb Style: RP (ARBITRARY DESIGNATION); Current Rating for Which Designed: 0.770 AMPERES MAXIMUM; Emitted Light Characteristic: NATURAL. 12 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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