PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

N603-4-5Bolometer Element,low Power

Narda Holdings, Inc. Dba Narda-Miteq Div Narda-Miteq · NSN 6625-00-630-1684 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-00-630-1684 — this item is cataloged by the U.S. Government under National Stock Number 6625-00-630-1684. Primary manufacturer part number: N603-4-5.
Features
  • Bolometer Element,low Power — FSC 6625
  • General Characteristics Item Description: DISC TYPE WITH 2 100 OHM WOLLASTON WIRE BOLOMETER ELEMENTS MTD ON A MICA DISC IN SERIES,BIAS CURRENT4.5 MA,RESISTANCE 200 OHMS,FREQUENCYRANGE 500 TO 10000 MHZ,TEMPERATURE COEFFICIENT POSITIVE,MAXIMUM VSWR 1.5SENSITIVITY 8 OHMS/MW MHz
  • General Characteristics Item Description: DISC TYPE WITH 2 100 OHM WOLLASTON WIRE BOLOMETER ELEMENTS MTD ON A MICA DISC IN SERIES,BIAS CURRENT4.5 MA,RESISTANCE 200 OHMS,FREQUENCYRANGE 500 TO 10000 MHZ,TEMPERATURE COEFFICIENT POSITIVE,MAXIMUM VSWR 1.5SENSITIVITY 8 OHMS/MW MHz
  • 3 verified cross-references
  • Primary manufacturer: Narda Holdings, Inc. Dba Narda-Miteq Div Narda-Miteq
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Bolometer Element,low Power, cataloged under National Stock Number 6625-00-630-1684, is classified within Federal Supply Class 6625 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Narda Holdings, Inc. Dba Narda-Miteq Div Narda-Miteq. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN6625-00-630-1684
Primary Part NumberN603-4-5
Item NameBolometer Element,low Power
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerNarda Holdings, Inc. Dba Narda-Miteq Div Narda-Miteq
StatusCANCELLED
General Characteristics Item DescriptionDISC TYPE WITH 2 100 OHM WOLLASTON WIRE BOLOMETER ELEMENTS MTD ON A MICA DISC IN SERIES,BIAS CURRENT4.5 MA,RESISTANCE 200 OHMS,FREQUENCYRANGE 500 TO 10000 MHZ,TEMPERATURE COEFFICIENT POSITIVE,MAXIMUM VSWR 1.5SENSITIVITY 8 OHMS/MW MHz
General Characteristics Item DescriptionDISC TYPE WITH 2 100 OHM WOLLASTON WIRE BOLOMETER ELEMENTS MTD ON A MICA DISC IN SERIES,BIAS CURRENT4.5 MA,RESISTANCE 200 OHMS,FREQUENCYRANGE 500 TO 10000 MHZ,TEMPERATURE COEFFICIENT POSITIVE,MAXIMUM VSWR 1.5SENSITIVITY 8 OHMS/MW MHz
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Shelf Life Code0
Criticality CodeN
Unit of IssueEA
SMR CodeVN
Weight0.0400 lbs
Cube0.0038 cu ft
Verified Substitutes 9
No Item Name Available
5950-00-064-40131583908-1 INTERCHANGEABLE
Reactor
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
3110-00-156-7906 INTERCHANGEABLE
Bearing,ball,annular
5305-00-206-1065 INTERCHANGEABLE
Screw,cap,hexagon Head
5935-00-259-3326100010 INTERCHANGEABLE
Connector,receptacle,electrical
Allianz Sweeper Company
5935-00-655-4424276-1854PC1 INTERCHANGEABLE
Connector,receptacle,electrical
Raytheon Co Equipment Development Lab
5961-01-113-4165 INTERCHANGEABLE
Semiconductor Device,thyristor
5985-01-122-48713291A-563 INTERCHANGEABLE
Attenuator,variable
General Microwave Corporation Div Kratos Microwave Electronics
5330-01-238-93335609 INTERCHANGEABLE
Seal,plain
Eaton Corporation Div Fed
Cross-Reference Index
Part NumberManufacturer
N603-4-5 PRIMARY Narda Holdings, Inc. Dba Narda-Miteq Div Narda-Miteq (USA)
MWB450 Solitron Devices, Inc. (USA)
5609 PRIMARY Solitron Devices, Inc. (USA)
Related Parts
6625-00-788-9755SUCCESSOR
NO ITEM NAME AVAILABLE
5950-00-064-4013INTERCHANGEABLE
REACTOR
1583908-1
3110-00-156-7906INTERCHANGEABLE
BEARING,BALL,ANNULAR
5305-00-206-1065INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5935-00-259-3326INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
100010
5935-00-655-4424INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
276-1854PC1
5961-01-113-4165INTERCHANGEABLE
SEMICONDUCTOR DEVICE,THYRISTOR
5985-01-122-4871INTERCHANGEABLE
ATTENUATOR,VARIABLE
3291A-563
5330-01-238-9333INTERCHANGEABLE
SEAL,PLAIN
5609

Frequently Asked Questions

What is NSN 6625-00-630-1684?

NSN 6625-00-630-1684 is a Bolometer Element,low Power, manufactured by Narda Holdings, Inc. Dba Narda-Miteq Div Narda-Miteq, classified under FSC 6625 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6625-00-630-1684?

NSN 6625-00-630-1684 has 3 cross-referenced part numbers: N603-4-5 (Narda Holdings, Inc. Dba Narda-Miteq Div Narda-Miteq), MWB450 (Solitron Devices, Inc.), 5609 (Solitron Devices, Inc.).

What NSN replaces 6625-00-630-1684?

There are 9 known substitutes for 6625-00-630-1684: 6625-00-788-9755, 5950-00-064-4013, 3110-00-156-7906 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of N603-4-5?

Key specifications for N603-4-5: General Characteristics Item Description: DISC TYPE WITH 2 100 OHM WOLLASTON WIRE BOLOMETER ELEMENTS MTD ON A MICA DISC IN SERIES,BIAS CURRENT4.5 MA,RESISTANCE 200 OHMS,FREQUENCYRANGE 500 TO 10000 MHZ,TEMPERATURE COEFFICIENT POSITIVE,MAXIMUM VSWR 1.5SENSITIVITY 8 OHMS/MW MHz; General Characteristics Item Description: DISC TYPE WITH 2 100 OHM WOLLASTON WIRE BOLOMETER ELEMENTS MTD ON A MICA DISC IN SERIES,BIAS CURRENT4.5 MA,RESISTANCE 200 OHMS,FREQUENCYRANGE 500 TO 10000 MHZ,TEMPERATURE COEFFICIENT POSITIVE,MAXIMUM VSWR 1.5SENSITIVITY 8 OHMS/MW MHz. 2 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6625-00-630-1684 still in active supply?

NSN 6625-00-630-1684 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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