PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4120BGenerator,pulse

Servo Corporation of America · NSN 6625-00-081-4457 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-00-081-4457 — this item is cataloged by the U.S. Government under National Stock Number 6625-00-081-4457. Primary manufacturer part number: 4120B.
Features
  • Generator,pulse — FSC 6625
  • Operating AC Frequency in Hertz: 60.0 NOMINAL SINGLE VOLTAGE
  • Pulse Rise Time Per Channel: 100.000 NANOSECONDS MINIMUM OUTPUT CHANNEL NS
  • Frequency Per Channel: 500.0 KILOHERTZ MAXIMUM OPERATING CHANNEL
  • Signal Data Type Per Channel: OPERATING CHANNEL PULSE
  • Pulse Rise Time Per Channel: 10.000 MILLISECONDS MAXIMUM OUTPUT CHANNEL MS
  • External AC Operating Voltage in Volts: 105.0 MINIMUM SINGLE VOLTAGE
  • External AC Operating Voltage in Volts: 125.0 MAXIMUM SINGLE VOLTAGE
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Generator,pulse, cataloged under National Stock Number 6625-00-081-4457, is classified within Federal Supply Class 6625 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Servo Corporation of America. Government technical data includes 27 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN6625-00-081-4457
Primary Part Number4120B
Item NameGenerator,pulse
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerServo Corporation of America
StatusCANCELLED
Operating AC Frequency in Hertz60.0 NOMINAL SINGLE VOLTAGE
Pulse Rise Time Per Channel100.000 NANOSECONDS MINIMUM OUTPUT CHANNEL NS
Frequency Per Channel500.0 KILOHERTZ MAXIMUM OPERATING CHANNEL
Signal Data Type Per ChannelOPERATING CHANNEL PULSE
Pulse Rise Time Per Channel10.000 MILLISECONDS MAXIMUM OUTPUT CHANNEL MS
External AC Operating Voltage in Volts105.0 MINIMUM SINGLE VOLTAGE
External AC Operating Voltage in Volts125.0 MAXIMUM SINGLE VOLTAGE
Frequency Per Channel0.5 HERTZ MINIMUM OPERATING CHANNEL
PhaseSINGLE
Pulse Peak Amplitude Per Channel30.000 VOLTS OUTPUT CHANNEL
Polarity Per ChannelPOSITIVE OUTPUT CHANNEL
Basic Shape StyleRECTANGULAR OR SQUARE
Average Life MeasurementNOT RATED
Impedance Rating Per Channel100.000 OHMS OUTPUT CHANNEL
Operating AC Frequency in Hertz60.0 NOMINAL SINGLE VOLTAGE
Pulse Rise Time Per Channel100.000 NANOSECONDS MINIMUM OUTPUT CHANNEL NS
Frequency Per Channel500.0 KILOHERTZ MAXIMUM OPERATING CHANNEL
Signal Data Type Per ChannelOPERATING CHANNEL PULSE
Pulse Rise Time Per Channel10.000 MILLISECONDS MAXIMUM OUTPUT CHANNEL MS
External AC Operating Voltage in Volts105.0 MINIMUM SINGLE VOLTAGE
External AC Operating Voltage in Volts125.0 MAXIMUM SINGLE VOLTAGE
Frequency Per Channel0.5 HERTZ MINIMUM OPERATING CHANNEL
PhaseSINGLE
Pulse Peak Amplitude Per Channel30.000 VOLTS OUTPUT CHANNEL
Polarity Per ChannelPOSITIVE OUTPUT CHANNEL
Basic Shape StyleRECTANGULAR OR SQUARE
Average Life MeasurementNOT RATED
Lifecycle & Compliance
Acquisition StatusCANCELLED
Successor5998-01-506-8732 (4120A)
HAZMATNo
Shelf Life Code0
Criticality CodeS
Unit of IssueEA
SMR CodeJS
Verified Substitutes 8
No Item Name Available
5998-01-506-87324120A SUCCESSOR
Circuit Card Assembly
Ribbon Communications Federal Inc.
4320-00-060-6828J35951-175 INTERCHANGEABLE
Pump,hydraulic Ram,hand Driven
Bosch Automotive Service Solutions Inc.
6645-00-225-27404120B INTERCHANGEABLE
Barrel,clock
Wakmann Watch Company Inc
5342-00-545-5789200041900 INTERCHANGEABLE
Mount,resilient,weapon System
Cardwell Condenser Corp Lapointe-Admiral Div
6645-01-396-18724120A INTERCHANGEABLE
Clock,barrel Assemb
Wakmann Watch Company Inc
6030-01-527-44494120A INTERCHANGEABLE
Receiver,light Signal
Ortel Corporation Div Ortel Division
6350-01-588-74784120B INTERCHANGEABLE
Alarm,smoke,automatic
Brk Brands Inc
Cross-Reference Index
Part NumberManufacturer
4120B PRIMARY Servo Corporation of America (USA)
4120A Servo Corporation of America (USA)
Related Parts
SUCCESSOR 5998-01-506-8732 Circuit Card Assembly · 4120A
6625-00-552-1942SUCCESSOR
NO ITEM NAME AVAILABLE
4320-00-060-6828INTERCHANGEABLE
PUMP,HYDRAULIC RAM,HAND DRIVEN
J35951-175
6645-00-225-2740INTERCHANGEABLE
BARREL,CLOCK
4120B
5342-00-545-5789INTERCHANGEABLE
MOUNT,RESILIENT,WEAPON SYSTEM
200041900
6645-01-396-1872INTERCHANGEABLE
CLOCK,BARREL ASSEMB
4120A
6030-01-527-4449INTERCHANGEABLE
RECEIVER,LIGHT SIGNAL
4120A
6350-01-588-7478INTERCHANGEABLE
ALARM,SMOKE,AUTOMATIC
4120B

Frequently Asked Questions

What is NSN 6625-00-081-4457?

NSN 6625-00-081-4457 is a Generator,pulse, manufactured by Servo Corporation of America, classified under FSC 6625 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6625-00-081-4457?

NSN 6625-00-081-4457 has 2 cross-referenced part numbers: 4120B (Servo Corporation of America), 4120A (Servo Corporation of America).

What NSN replaces 6625-00-081-4457?

There are 8 known substitutes for 6625-00-081-4457: 6625-00-552-1942, 5998-01-506-8732, 4320-00-060-6828 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 4120B?

Key specifications for 4120B: Operating AC Frequency in Hertz: 60.0 NOMINAL SINGLE VOLTAGE; Pulse Rise Time Per Channel: 100.000 NANOSECONDS MINIMUM OUTPUT CHANNEL NS; Frequency Per Channel: 500.0 KILOHERTZ MAXIMUM OPERATING CHANNEL; Signal Data Type Per Channel: OPERATING CHANNEL PULSE. 30 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6625-00-081-4457 still in active supply?

NSN 6625-00-081-4457 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.
PartsTable Design LLC · partstable.com