PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

307C8-2Ammeter

Tdk-Lambda Americas Inc. Div High Power Division · NSN 6625-00-539-8814 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-00-539-8814 — this item is cataloged by the U.S. Government under National Stock Number 6625-00-539-8814. Primary manufacturer part number: 307C8-2.
Features
  • Ammeter — FSC 6625
  • Sensitivity Rating: 50.0 MILLIVOLTS
  • Mounting Bolt Circle Diameter: 3.160 INCHES NOMINAL IN
  • Circuit Attachment Method and Quantity: 2 SOLDER STUD
  • Installation Design: PANEL
  • Overall Diameter: 3.500 INCHES NOMINAL IN
  • Meter Depth Behind Mounting Flange: 1.063 INCHES NOMINAL IN
  • Meter Body Diameter Behind Mounting Flange: 2.675 INCHES NOMINAL IN
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Ammeter, cataloged under National Stock Number 6625-00-539-8814, is classified within Federal Supply Class 6625 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Tdk-Lambda Americas Inc. Div High Power Division. Government technical data includes 28 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN6625-00-539-8814
Primary Part Number307C8-2
Item NameAmmeter
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerTdk-Lambda Americas Inc. Div High Power Division
StatusCANCELLED
Sensitivity Rating50.0 MILLIVOLTS
Mounting Bolt Circle Diameter3.160 INCHES NOMINAL IN
Circuit Attachment Method and Quantity2 SOLDER STUD
Installation DesignPANEL
Overall Diameter3.500 INCHES NOMINAL IN
Meter Depth Behind Mounting Flange1.063 INCHES NOMINAL IN
Meter Body Diameter Behind Mounting Flange2.675 INCHES NOMINAL IN
ColorUNABLE TO DECODE
Scale Division Quantity50 SINGLE INDICATOR SINGLE RANGE
Mounting Arrangement StyleTHREE HOLE/STUD BOLT CIRCLE
Accuracy in Percent-2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE
Dial Scale Marking ColorBLACK SINGLE INDICATOR SINGLE RANGE
Mounting Facility Type and Quantity3 UNTHREADED HOLE(S)
Circuit Current for Which DesignedDC
Mounting Hole Diameter0.150 INCHES NOMINAL IN
Style DesignatorROUND FLUSH MTG
Sensitivity Rating50.0 MILLIVOLTS
Mounting Bolt Circle Diameter3.160 INCHES NOMINAL IN
Circuit Attachment Method and Quantity2 SOLDER STUD
Installation DesignPANEL
Overall Diameter3.500 INCHES NOMINAL IN
Meter Depth Behind Mounting Flange1.063 INCHES NOMINAL IN
Meter Body Diameter Behind Mounting Flange2.675 INCHES NOMINAL IN
ColorUNABLE TO DECODE
Scale Division Quantity50 SINGLE INDICATOR SINGLE RANGE
Mounting Arrangement StyleTHREE HOLE/STUD BOLT CIRCLE
Accuracy in Percent-2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE
Dial Scale Marking ColorBLACK SINGLE INDICATOR SINGLE RANGE
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
No Item Name Available
6625-00-088-910692025-01 SUCCESSOR
Meter,modulation
Agilent Technologies, Inc. Div Agilent Technologies Headquarters
6625-00-255-5806232-71 SUCCESSOR
Voltmeter
Jewell Instruments Llc
6625-00-649-4962702053-1REVC SUCCESSOR
Meter,replacement
L3harris Technologies, Inc. Dba Harris Corporation
6625-00-187-1788 INTERCHANGEABLE
Ammeter
6625-00-221-2576 INTERCHANGEABLE
Multimeter
6625-00-228-8823 INTERCHANGEABLE
Voltmeter
6625-00-256-0600 INTERCHANGEABLE
Test Set,electron Tube
6625-00-539-8473 INTERCHANGEABLE
Voltmeter
6625-00-539-9722 INTERCHANGEABLE
Test Set,electron Tube
Cross-Reference Index
Part NumberManufacturer
307C8-2 Tdk-Lambda Americas Inc. Div High Power Division (USA)
HM3 Jewell Instruments Llc (USA)
Related Parts
6625-00-553-8135SUCCESSOR
NO ITEM NAME AVAILABLE
6625-00-088-9106SUCCESSOR
METER,MODULATION
92025-01
6625-00-255-5806SUCCESSOR
VOLTMETER
232-71
6625-00-649-4962SUCCESSOR
METER,REPLACEMENT
702053-1REVC
6625-00-187-1788INTERCHANGEABLE
AMMETER
6625-00-221-2576INTERCHANGEABLE
MULTIMETER
6625-00-228-8823INTERCHANGEABLE
VOLTMETER
6625-00-256-0600INTERCHANGEABLE
TEST SET,ELECTRON TUBE
6625-00-539-8473INTERCHANGEABLE
VOLTMETER
6625-00-539-9722INTERCHANGEABLE
TEST SET,ELECTRON TUBE
6625-00-668-5068INTERCHANGEABLE
AMMETER
1309
6625-00-669-0757INTERCHANGEABLE
WATTMETER
350TYPE270

Frequently Asked Questions

What is NSN 6625-00-539-8814?

NSN 6625-00-539-8814 is a Ammeter, manufactured by Tdk-Lambda Americas Inc. Div High Power Division, classified under FSC 6625 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6625-00-539-8814?

NSN 6625-00-539-8814 has 2 cross-referenced part numbers: 307C8-2 (Tdk-Lambda Americas Inc. Div High Power Division), HM3 (Jewell Instruments Llc).

What NSN replaces 6625-00-539-8814?

There are 12 known substitutes for 6625-00-539-8814: 6625-00-553-8135, 6625-00-088-9106, 6625-00-255-5806 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 307C8-2?

Key specifications for 307C8-2: Sensitivity Rating: 50.0 MILLIVOLTS; Special Features: ALSO DESIGNED FOR NONMAGNETIC PANELS; Mounting Bolt Circle Diameter: 3.160 INCHES NOMINAL IN; Circuit Attachment Method and Quantity: 2 SOLDER STUD. 30 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6625-00-539-8814 still in active supply?

NSN 6625-00-539-8814 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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