PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

ZM61UBridge,capacitance-Inductance-Re

Joint Electronics Type Designation System · NSN 6625-00-144-3070 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-00-144-3070 — this item is cataloged by the U.S. Government under National Stock Number 6625-00-144-3070. Primary manufacturer part number: ZM61U.
Features
  • Bridge,capacitance-Inductance-Re — FSC 6625
  • Functional Description: MEASURES 2-TERMINAL RF IMPEDANCE IN TERMS OF EQUIVALENT PARALLEL RESISTANCE & CAPACITANCE; SELF CONTAINED; INCLUDES A CONTINUOUSLY TUNED OSCILLATOR,HIGH FREQUENCY BRIDGE,AMPLIFIER-DETECTOR,& A NULL INDICATING METER; A FRONT PANEL CONTROL PERMITS ADJUSTMENT OF RF EXCITATION SIGNAL FOR LOW LEVEL APPLICATIONS; REAR PANEL CONNECTORS PROVIDE AN IF OUTPUT FOR IMPROVED RESOLUTION WHEN NULLING; USED FOR INTERMEDIATE LEVEL OF MAINTENANCE
  • Resistance Scale Range: +15.0 TO 100000.0 OHMS
  • Reference Data and Literature: HEWLETT-PACKARD CATALOG P. 75
  • Relationship to Similar Equipment: USE 6625006207474 UNTIL EXHAUSTED
  • Capacitance Scale Overall Accuracy Rating in Percent: -2.0 TO 2.0
  • Material: ALUMINUM OR STEEL CASE
  • Balance Indicator Type: METER
Applications
  • Applications requiring Aluminum or Steel Case construction
General Description

The Bridge,capacitance-Inductance-Re, cataloged under National Stock Number 6625-00-144-3070, is classified within Federal Supply Class 6625 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Joint Electronics Type Designation System. Government technical data includes 25 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN6625-00-144-3070
Primary Part NumberZM61U
Item NameBridge,capacitance-Inductance-Re
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerJoint Electronics Type Designation System
StatusACTIVE
Functional DescriptionMEASURES 2-TERMINAL RF IMPEDANCE IN TERMS OF EQUIVALENT PARALLEL RESISTANCE & CAPACITANCE; SELF CONTAINED; INCLUDES A CONTINUOUSLY TUNED OSCILLATOR,HIGH FREQUENCY BRIDGE,AMPLIFIER-DETECTOR,& A NULL INDICATING METER; A FRONT PANEL CONTROL PERMITS ADJUSTMENT OF RF EXCITATION SIGNAL FOR LOW LEVEL APPLICATIONS; REAR PANEL CONNECTORS PROVIDE AN IF OUTPUT FOR IMPROVED RESOLUTION WHEN NULLING; USED FOR INTERMEDIATE LEVEL OF MAINTENANCE
Resistance Scale Range+15.0 TO 100000.0 OHMS
Reference Data and LiteratureHEWLETT-PACKARD CATALOG P. 75
Relationship to Similar EquipmentUSE 6625006207474 UNTIL EXHAUSTED
Capacitance Scale Overall Accuracy Rating in Percent-2.0 TO 2.0
MaterialALUMINUM OR STEEL CASE
Balance Indicator TypeMETER
Inductance Scale Overall Accuracy Rating in Percent-2.0 TO 2.0
Inductance Scale Range+1.0 TO 100.0 MICROHENRIES
PhaseSINGLE
Entry Date76-10-01
DC Leakage Test Voltage0.0 NOMINAL
Functional ClassificationAA-2.2
Frequency Rating50.0 HERTZ MINIMUM AND 60.0 HERTZ MAXIMUM
Resistance Scale Overall Accuracy Rating in Percent-2.0 TO 2.0
AC Voltage Rating115.0 VOLTS NOMINAL
Capacitance Scale Range+0.0 TO 20.0 MICRO-MICROFARADS
Functional DescriptionMEASURES 2-TERMINAL RF IMPEDANCE IN TERMS OF EQUIVALENT PARALLEL RESISTANCE & CAPACITANCE; SELF CONTAINED; INCLUDES A CONTINUOUSLY TUNED OSCILLATOR,HIGH FREQUENCY BRIDGE,AMPLIFIER-DETECTOR,& A NULL INDICATING METER; A FRONT PANEL CONTROL PERMITS ADJUSTMENT OF RF EXCITATION SIGNAL FOR LOW LEVEL APPLICATIONS; REAR PANEL CONNECTORS PROVIDE AN IF OUTPUT FOR IMPROVED RESOLUTION WHEN NULLING; USED FOR INTERMEDIATE LEVEL OF MAINTENANCE
Resistance Scale Range+15.0 TO 100000.0 OHMS
Reference Data and LiteratureHEWLETT-PACKARD CATALOG P. 75
Relationship to Similar EquipmentUSE 6625006207474 UNTIL EXHAUSTED
Capacitance Scale Overall Accuracy Rating in Percent-2.0 TO 2.0
MaterialALUMINUM OR STEEL CASE
Balance Indicator TypeMETER
Inductance Scale Overall Accuracy Rating in Percent-2.0 TO 2.0
Lifecycle & Compliance
Acquisition StatusACTIVE
Successor6625-00-987-6722 (250B)
HAZMATNo
Shelf Life Code0
Criticality CodeS
Unit of IssueEA
SMR CodeVS
Verified Substitutes 6
Bridge,impedance
6625-00-987-6722250B SUCCESSOR
Detecting Element,directional Co
Bird Electronic Corporation Div Bird Electronic Corp
4310-00-035-7512111023PC252 INTERCHANGEABLE
Liner,cylinder
Curtiss-Wright Electro-Mechanical Corporation Div Epd
5360-00-292-424104751-250B-375 INTERCHANGEABLE
Spring,helical,compression
Anderson Greenwood Lp Dba Anderson Greenwood Crosby
5961-00-980-7520 INTERCHANGEABLE
Transistor
6685-01-373-2525250B INTERCHANGEABLE
Controller,pressure
Mks Inc.
Cross-Reference Index
Part NumberManufacturer
250B Keysight Technologies Inc (USA)
ZM61U PRIMARY Joint Electronics Type Designation System (USA)
250B Keysight Technologies, Inc. (USA)
250B Hewlett-Packard Company Dba HP (USA)
Related Parts
SUCCESSOR 6625-00-987-6722 Detecting Element,directional Co · 250B
6625-00-435-5470SUCCESSOR
BRIDGE,IMPEDANCE
4310-00-035-7512INTERCHANGEABLE
LINER,CYLINDER
111023PC252
5360-00-292-4241INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
04751-250B-375
5961-00-980-7520INTERCHANGEABLE
TRANSISTOR
6685-01-373-2525INTERCHANGEABLE
CONTROLLER,PRESSURE
250B

Frequently Asked Questions

What is NSN 6625-00-144-3070?

NSN 6625-00-144-3070 is a Bridge,capacitance-Inductance-Re, manufactured by Joint Electronics Type Designation System, classified under FSC 6625 (No Item Name Available). Status: active.

What are the part numbers for NSN 6625-00-144-3070?

NSN 6625-00-144-3070 has 4 cross-referenced part numbers: 250B (Keysight Technologies Inc), ZM61U (Joint Electronics Type Designation System), 250B (Keysight Technologies, Inc.), 250B (Hewlett-Packard Company Dba HP).

What NSN replaces 6625-00-144-3070?

There are 6 known substitutes for 6625-00-144-3070: 6625-00-435-5470, 6625-00-987-6722, 4310-00-035-7512 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of ZM61U?

Key specifications for ZM61U: Functional Description: MEASURES 2-TERMINAL RF IMPEDANCE IN TERMS OF EQUIVALENT PARALLEL RESISTANCE & CAPACITANCE; SELF CONTAINED; INCLUDES A CONTINUOUSLY TUNED OSCILLATOR,HIGH FREQUENCY BRIDGE,AMPLIFIER-DETECTOR,& A NULL INDICATING METER; A FRONT PANEL CONTROL PERMITS ADJUSTMENT OF RF EXCITATION SIGNAL FOR LOW LEVEL APPLICATIONS; REAR PANEL CONNECTORS PROVIDE AN IF OUTPUT FOR IMPROVED RESOLUTION WHEN NULLING; USED FOR INTERMEDIATE LEVEL OF MAINTENANCE; Resistance Scale Range: +15.0 TO 100000.0 OHMS; End Item Identification: TYPE NO. ZM-61/U; Reference Data and Literature: HEWLETT-PACKARD CATALOG P. 75. 30 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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