PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

257/03 OPT1-I/FMeter,modulation

Wayne Kerr Electronics Inc · NSN 6625-01-452-5761 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-01-452-5761 — this item is cataloged by the U.S. Government under National Stock Number 6625-01-452-5761. Primary manufacturer part number: 257/03 OPT1-I/F.
Features
  • Meter,modulation — FSC 6625
  • Indicator Type: DIAL W/POINTER
  • Style Designator: RECTANGULAR OR SQUARE
  • Circuit Current for Which Designed: AC
  • Phase: SINGLE
  • Installation Design: BENCH OR HANDHELD
  • Measurement Range: +1.5 TO 2000.0 KILOHERTZ SINGLE INDICATOR ALL RANGES
  • Operating Voltage Rating in Volts: 115.0 AC NOMINAL
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Meter,modulation, cataloged under National Stock Number 6625-01-452-5761, is classified within Federal Supply Class 6625 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Wayne Kerr Electronics Inc. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN6625-01-452-5761
Primary Part Number257/03 OPT1-I/F
Item NameMeter,modulation
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerWayne Kerr Electronics Inc
StatusACTIVE
Indicator TypeDIAL W/POINTER
Style DesignatorRECTANGULAR OR SQUARE
Circuit Current for Which DesignedAC
PhaseSINGLE
Installation DesignBENCH OR HANDHELD
Measurement Range+1.5 TO 2000.0 KILOHERTZ SINGLE INDICATOR ALL RANGES
Operating Voltage Rating in Volts115.0 AC NOMINAL
Frequency Rating48.0 HERTZ MINIMUM AND 60.0 HERTZ MAXIMUM
Circuit Attachment Method and Quantity4 CONNECTOR, PLUG
Indicator TypeDIAL W/POINTER
Style DesignatorRECTANGULAR OR SQUARE
Circuit Current for Which DesignedAC
PhaseSINGLE
Installation DesignBENCH OR HANDHELD
Measurement Range+1.5 TO 2000.0 KILOHERTZ SINGLE INDICATOR ALL RANGES
Operating Voltage Rating in Volts115.0 AC NOMINAL
Frequency Rating48.0 HERTZ MINIMUM AND 60.0 HERTZ MAXIMUM
Circuit Attachment Method and Quantity4 CONNECTOR, PLUG
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Unit of IssueEA
SMR CodeC
Weight7.0000 lbs
Cube0.0556 cu ft
Verified Substitutes 8
Meter,modulation
5330-00-232-8513 INTERCHANGEABLE
Packing,preformed
5962-00-764-0692058-000798 INTERCHANGEABLE
Microcircuit,linear
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple
5935-01-149-689311532 INTERCHANGEABLE
Connector,plug,electrical
Gardner Denver Water Jetting Systems, Inc. Div Engineered Package Group
3020-01-297-4702 INTERCHANGEABLE
Gear,helical
6640-01-334-8793 INTERCHANGEABLE
Cabinet,laboratory
6240-01-565-339220238 INTERCHANGEABLE
Lamp,incandescent
General Electric Company Dba Ge
1005-01-700-283925703 INTERCHANGEABLE
Cover,gunsight
Schmidt & Bender Incorporated
Cross-Reference Index
Part NumberManufacturer
257/03 OPT1-I/F Wayne Kerr Electronics Inc (USA)
AM-257/03-IF Wayne Kerr Electronics Inc (USA)
257/03 American Power Conversion Uk Ltd (GBR)
257/03 OPT1-I/F Wayne Kerr Electronics Inc (USA)
093257/03 American Power Conversion Uk Ltd (GBR)
AMM257 Wayne Kerr Electronics Inc (USA)
AM-257/03-IF Wayne Kerr Electronics Inc (USA)
Related Parts
6625-01-396-8880SUCCESSOR
METER,MODULATION
5330-00-232-8513INTERCHANGEABLE
PACKING,PREFORMED
5962-00-764-0692INTERCHANGEABLE
MICROCIRCUIT,LINEAR
058-000798
5935-01-149-6893INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
11532
3020-01-297-4702INTERCHANGEABLE
GEAR,HELICAL
6640-01-334-8793INTERCHANGEABLE
CABINET,LABORATORY
6240-01-565-3392INTERCHANGEABLE
LAMP,INCANDESCENT
20238
1005-01-700-2839INTERCHANGEABLE
COVER,GUNSIGHT
25703

Frequently Asked Questions

What is NSN 6625-01-452-5761?

NSN 6625-01-452-5761 is a Meter,modulation, manufactured by Wayne Kerr Electronics Inc, classified under FSC 6625 (No Item Name Available). Status: active.

What are the part numbers for NSN 6625-01-452-5761?

NSN 6625-01-452-5761 has 7 cross-referenced part numbers: 257/03 OPT1-I/F (Wayne Kerr Electronics Inc), AM-257/03-IF (Wayne Kerr Electronics Inc), 257/03 (American Power Conversion Uk Ltd), 257/03 OPT1-I/F (Wayne Kerr Electronics Inc), 093257/03 (American Power Conversion Uk Ltd) and 2 more.

What NSN replaces 6625-01-452-5761?

There are 8 known substitutes for 6625-01-452-5761: 6625-01-396-8880, 5330-00-232-8513, 5962-00-764-0692 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 257/03 OPT1-I/F?

Key specifications for 257/03 OPT1-I/F: End Item Identification: GEN-AP-T; Indicator Type: DIAL W/POINTER; Style Designator: RECTANGULAR OR SQUARE; Circuit Current for Which Designed: AC. 28 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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