PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

SM-A-618690-050Crystal Unit,quartz

Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir · NSN 5955-00-548-1400 · FSC 5955 · No Item Name Available
Verified by PartsTable
NSN 5955-00-548-1400 — this item is cataloged by the U.S. Government under National Stock Number 5955-00-548-1400. Primary manufacturer part number: SM-A-618690-050.
Features
  • Crystal Unit,quartz — FSC 5955
  • Drive Level Rating: 1.6 MILLIWATTS MINIMUM AND 2.0 MILLIWATTS MAXIMUM
  • Body Thickness: 0.150 INCHES MAXIMUM IN
  • Terminal Length: 0.5003 INCHES MINIMUM IN
  • Frequency Tolerance for Operating Temp in Percent: -0.002 TO 0.002 AND -0.003 TO 0.003
  • Center to Center Distance Between Terminals: 0.184 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN
  • Specified Frequency: 50.000 MEGAHERTZ AND 125.000 MEGAHERTZ
  • Mode of Oscillation: THIRD OVERTONE AND FIFTH OVERTONE
Applications
  • Applications requiring Glass Cover Holder construction
General Description

The Crystal Unit,quartz, cataloged under National Stock Number 5955-00-548-1400, is classified within Federal Supply Class 5955 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5955-00-548-1400
Primary Part NumberSM-A-618690-050
Item NameCrystal Unit,quartz
FSC / FSG5955 / 59 — No Item Name Available
ManufacturerUs Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
StatusACTIVE
Drive Level Rating1.6 MILLIWATTS MINIMUM AND 2.0 MILLIWATTS MAXIMUM
Body Thickness0.150 INCHES MAXIMUM IN
Terminal Length0.5003 INCHES MINIMUM IN
Frequency Tolerance for Operating Temp in Percent-0.002 TO 0.002 AND -0.003 TO 0.003
Center to Center Distance Between Terminals0.184 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN
Specified Frequency50.000 MEGAHERTZ AND 125.000 MEGAHERTZ
Mode of OscillationTHIRD OVERTONE AND FIFTH OVERTONE
Terminal Diameter0.016 INCHES MINIMUM AND 0.019 INCHES MAXIMUM IN
Body Width0.402 INCHES MAXIMUM IN
Style DesignatorRECTANGULAR BODY, GULL WING
Overall Thickness0.183 INCHES MAXIMUM IN
Equivalent Resistance Value in Ohms80.0 MAXIMUM
Circuit ResonanceSERIES RESONANCE
Shunt Capacitance in Picofarads4.0 MINIMUM AND 6.0 MAXIMUM
Operating Temp Range-55.0 TO 85.0 CELSIUS DEGC
MaterialGLASS COVER HOLDER
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5955-00-087-5035117-001-0001 INTERCHANGEABLE
Crystal Unit,quartz
Northrop Grumman Systems Corporation
5955-00-548-1403SM-A-618690-060 INTERCHANGEABLE
Crystal Unit,quartz
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5955-00-548-1408SM-A-618690-070 INTERCHANGEABLE
Crystal Unit,quartz
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5955-00-548-1413SM-A-618690-080 INTERCHANGEABLE
Crystal Unit,quartz
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5955-00-548-1421SM-A-618690-090 INTERCHANGEABLE
Crystal Unit,quartz
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5955-00-548-1428SM-A-618690-100 INTERCHANGEABLE
Crystal Unit,quartz
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
2940-01-135-556142349 INTERCHANGEABLE
Filter Element,intake Air Cleane
Wix Corp
Cross-Reference Index
Part NumberManufacturer
BR2WAT50MHZ Bliley Technologies Inc (USA)
H3W Cts Inc (USA)
SM-A-618690-050 Cts Inc (USA)
CA3-524 Wenzel International Inc Div Croven Crystals (CAN)
SM-A-618690-050 PRIMARY Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir (USA)
SM-A-618690-050 General Dynamics Advanced Information Systems Inc. Dba General Dynamics Advanced Information Systems (USA)
Related Parts
5955-00-087-5035INTERCHANGEABLE
CRYSTAL UNIT,QUARTZ
117-001-0001
5955-00-548-1403INTERCHANGEABLE
CRYSTAL UNIT,QUARTZ
SM-A-618690-060
5955-00-548-1408INTERCHANGEABLE
CRYSTAL UNIT,QUARTZ
SM-A-618690-070
5955-00-548-1413INTERCHANGEABLE
CRYSTAL UNIT,QUARTZ
SM-A-618690-080
5955-00-548-1421INTERCHANGEABLE
CRYSTAL UNIT,QUARTZ
SM-A-618690-090
5955-00-548-1428INTERCHANGEABLE
CRYSTAL UNIT,QUARTZ
SM-A-618690-100
2940-01-135-5561INTERCHANGEABLE
FILTER ELEMENT,INTAKE AIR CLEANE
42349

Frequently Asked Questions

What is NSN 5955-00-548-1400?

NSN 5955-00-548-1400 is a Crystal Unit,quartz, manufactured by Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir, classified under FSC 5955 (No Item Name Available). Status: active.

What are the part numbers for NSN 5955-00-548-1400?

NSN 5955-00-548-1400 has 6 cross-referenced part numbers: BR2WAT50MHZ (Bliley Technologies Inc), H3W (Cts Inc), SM-A-618690-050 (Cts Inc), CA3-524 (Wenzel International Inc Div Croven Crystals), SM-A-618690-050 (Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir) and 1 more.

What NSN replaces 5955-00-548-1400?

There are 7 known substitutes for 5955-00-548-1400: 5955-00-087-5035, 5955-00-548-1403, 5955-00-548-1408 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of SM-A-618690-050?

Key specifications for SM-A-618690-050: Drive Level Rating: 1.6 MILLIWATTS MINIMUM AND 2.0 MILLIWATTS MAXIMUM; Body Thickness: 0.150 INCHES MAXIMUM IN; Terminal Length: 0.5003 INCHES MINIMUM IN; Frequency Tolerance for Operating Temp in Percent: -0.002 TO 0.002 AND -0.003 TO 0.003. 18 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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