PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

476ABolometer,radio Frequency

Keysight Technologies Inc · NSN 6625-00-539-9937 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-00-539-9937 — this item is cataloged by the U.S. Government under National Stock Number 6625-00-539-9937. Primary manufacturer part number: 476A.
Features
  • Bolometer,radio Frequency — FSC 6625
  • Sensing Element Type: BUS FUSE
  • Frequency Range Rating: +0.01 TO 1.00 GIGAHERTZ
  • Overall Diameter: 1.750 INCHES NOMINAL IN
  • Battery Case: NOT PROVIDED
  • Inductive Pickup Loop Type: FIXED
  • Sensing Element Type: BUS FUSE
  • Frequency Range Rating: +0.01 TO 1.00 GIGAHERTZ
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Bolometer,radio Frequency, cataloged under National Stock Number 6625-00-539-9937, is classified within Federal Supply Class 6625 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Keysight Technologies Inc. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN6625-00-539-9937
Primary Part Number476A
Item NameBolometer,radio Frequency
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerKeysight Technologies Inc
StatusACTIVE
Sensing Element TypeBUS FUSE
Frequency Range Rating+0.01 TO 1.00 GIGAHERTZ
Overall Diameter1.750 INCHES NOMINAL IN
Battery CaseNOT PROVIDED
Inductive Pickup Loop TypeFIXED
Sensing Element TypeBUS FUSE
Frequency Range Rating+0.01 TO 1.00 GIGAHERTZ
Overall Diameter1.750 INCHES NOMINAL IN
Battery CaseNOT PROVIDED
Inductive Pickup Loop TypeFIXED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Criticality CodeQ
Unit of IssueEA
SMR CodeLF
Verified Substitutes 2
3110-00-100-0253476A INTERCHANGEABLE
Cone and Rollers,tapered Roller
The Timken Corporation
6135-01-268-2151152-99-5341 INTERCHANGEABLE
Battery,nonrechargeable
Emcee Electronics, Inc.
Cross-Reference Index
Part NumberManufacturer
476A PRIMARY Keysight Technologies Inc (USA)
476A Hewlett-Packard Company Dba HP (USA)
476A Keysight Technologies, Inc. (USA)
Related Parts
3110-00-100-0253INTERCHANGEABLE
CONE AND ROLLERS,TAPERED ROLLER
476A
6135-01-268-2151INTERCHANGEABLE
BATTERY,NONRECHARGEABLE
152-99-5341

Frequently Asked Questions

What is NSN 6625-00-539-9937?

NSN 6625-00-539-9937 is a Bolometer,radio Frequency, manufactured by Keysight Technologies Inc, classified under FSC 6625 (No Item Name Available). Status: active.

What are the part numbers for NSN 6625-00-539-9937?

NSN 6625-00-539-9937 has 3 cross-referenced part numbers: 476A (Keysight Technologies Inc), 476A (Hewlett-Packard Company Dba HP), 476A (Keysight Technologies, Inc.).

What NSN replaces 6625-00-539-9937?

There are 2 known substitutes for 6625-00-539-9937: 3110-00-100-0253, 6135-01-268-2151. Verify interchangeability with system specifications before substitution.

What are the specifications of 476A?

Key specifications for 476A: Sensing Element Type: BUS FUSE; Overall Length: 5.000 INCHES NOMINAL IN; Frequency Range Rating: +0.01 TO 1.00 GIGAHERTZ; Overall Diameter: 1.750 INCHES NOMINAL IN. 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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