G21-18 — CRYSTAL UNIT,QUARTZ

✓ Government record, cited

Vertiv · COMPONENT

PRODUCT OVERVIEW

G21-18: CRYSTAL UNIT,QUARTZ.

Basic rPDUs deliver reliable power to critical IT equipment within a rack or cabinet. Key specifications include material: GLASS COVER HOLDER, body_length: 0.530 INCHES MAXIMUM IN, overall_width: 0.435 INCHES MAXIMUM IN, overall_length: 0.780 INCHES MAXIMUM IN, terminal_length: 0.223 INCHES MINIMUM AND 0.248 INCHES MAXIMUM IN, style_designator: ROUND BODY, FERRULE TERMINALS. This part is cataloged in the U.S.

Government catalog under NSN 5955-00-928-1530, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS

G21-18

NSN: 5955-00-928-1530
NIINs: 009281530, 016165502
FSC: 5955 — Oscillators and Piezoelectric Crystals
CAGE: 00136 — MICROSEMI CORP. - HIGH PERFORMANCE TIMING DBA VECTRON INTERNATIONAL- CANCELLED (USA)

SPECIFICATIONS

material	GLASS COVER HOLDER
body_length	0.530 INCHES MAXIMUM IN
overall_width	0.435 INCHES MAXIMUM IN
overall_length	0.780 INCHES MAXIMUM IN
terminal_length	0.223 INCHES MINIMUM AND 0.248 INCHES MAXIMUM IN
style_designator	ROUND BODY, FERRULE TERMINALS
circuit_resonance	SERIES RESONANCE
overall_thickness	0.185 INCHES MAXIMUM IN
terminal_diameter	0.038 INCHES MINIMUM AND 0.042 INCHES MAXIMUM IN
drive_level_rating	2.0 MILLIWATTS NOMINAL AND 1.8 MILLIWATTS MINIMUM AND 2.2 MILLIWATTS MAXIMUM
mode_of_oscillation	FIFTH OVERTONE AND THIRD OVERTONE
specified_frequency	108.500 MEGAHERTZ
NSN	5955-00-928-1530

COMPONENT DIAGRAM

KEY FEATURES

•

FREQUENCY TOLERANCE FOR OPERATING TEMP IN PERCENT: -0.006 TO 0.006

•

TERMINAL DIAMETER: 0.038 INCHES MINIMUM AND 0.042 INCHES MAXIMUM IN

•

TERMINAL LENGTH: 0.223 INCHES MINIMUM AND 0.248 INCHES MAXIMUM IN

•

MODE OF OSCILLATION: FIFTH OVERTONE AND THIRD OVERTONE

•

EQUIVALENT RESISTANCE VALUE IN OHMS: 40.0 NOMINAL

•

OVERALL THICKNESS: 0.185 INCHES MAXIMUM IN

•

STYLE DESIGNATOR: ROUND BODY, FERRULE TERMINALS

TECHNICAL CHARACTERISTICS

FREQUENCY TOLERANCE FOR OPERATING TEMP IN PERCENT	-0.006 TO 0.006
TERMINAL DIAMETER	0.038 INCHES MINIMUM AND 0.042 INCHES MAXIMUM IN
TERMINAL LENGTH	0.223 INCHES MINIMUM AND 0.248 INCHES MAXIMUM IN
MODE OF OSCILLATION	FIFTH OVERTONE AND THIRD OVERTONE
EQUIVALENT RESISTANCE VALUE IN OHMS	40.0 NOMINAL
OVERALL THICKNESS	0.185 INCHES MAXIMUM IN
STYLE DESIGNATOR	ROUND BODY, FERRULE TERMINALS
OVERALL LENGTH	0.780 INCHES MAXIMUM IN
OVERALL WIDTH	0.435 INCHES MAXIMUM IN
DRIVE LEVEL RATING	2.0 MILLIWATTS NOMINAL AND 1.8 MILLIWATTS MINIMUM AND 2.2 MILLIWATTS MAXIMUM

SUBSTITUTES & CROSS-REFERENCES 1

8537694-18Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Normally procured from the manufacturer (OEM)Demilitarization required — mutilation + specific procedure

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FREQUENTLY ASKED QUESTIONS

What is G21-18?

G21-18 is a CRYSTAL UNIT,QUARTZ manufactured by Vertiv.

What parts can replace G21-18?

There is 1 known substitute for G21-18: 8537694-18. Substitute compatibility should be verified for your specific system.

What is the NSN for G21-18?

G21-18 is cataloged in the U.S. Government catalog under NSN 5955-00-928-1530. This indicates validated use in U.S. government and defense supply chains.

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