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Technical Data Sheet
PartsTable / MRO / 54-140
54-140 ✓ Verified by PartsTable
Tacens · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

- Exclusive 2 bay high definition round touch-LCD with included stylus pen or finger operation.<br>- Touch switch on/off and reset functions.<br>- 4 sets of fan monitoring and speed control with automatic or manual user control.<br>- 4 sets of temperature monitoring and alarm system with automatic or manual user control.<br>- Full programmable alarm protection system for computer fans and temperatures.<br>- Stylish design with elegant white lighting.<br>- Dimensions: 149 (W) x 85 (H)(2 bays) x 75(D). This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-118-2168, indicating validated use in U.S. government and defense logistics supply chains.

WHERE IT FITS
MRO→ MRO_GENERAL→ 54-140
NSN: 5330-00-118-2168
FSC: 5330
CAGE: 00198 — PRATT & WHITNEY CANADA CORP DIV PRATT & WHITNEY CANADA CORP. (CAN)
SPECIFICATIONS
length2.080 INCHES NOMINAL IN
materialCOPPER OVERALL
body_width0.514 INCHES MINIMUM AND 0.525 INCHES MAXIMUM IN
ring_styleEXPANDING CONCENTRIC
body_height0.205 INCHES MAXIMUM IN
body_length1.290 INCHES MAXIMUM IN
joint_styleSTEP JOINT
scale_range+0.1 TO 80.0 POUNDS PER SQUARE INCH SINGLE INDICATOR SINGLE SCALE LBS
contact_typeTHREADED STUD
current_typeDC
body_materialPLASTIC
overall_width0.610 INCHES IN
NSN5330-00-118-2168
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 54-140 MFR: Tacens ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
FSC APPLICATION DATA: ENGINE,AIRCRAFT,RECIPROCATING
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 3232 ASSN STD ALL MATERIAL RESPONSES OVERALL
•
MATERIAL: ASBESTOS AND RUBBER SYNTHETIC OVERALL
•
CROSS-SECTIONAL THICKNESS: 0.011 INCHES MINIMUM AND 0.021 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
FSC APPLICATION DATAENGINE,AIRCRAFT,RECIPROCATING
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 3232 ASSN STD ALL MATERIAL RESPONSES OVERALL
MATERIALASBESTOS AND RUBBER SYNTHETIC OVERALL
CROSS-SECTIONAL THICKNESS0.011 INCHES MINIMUM AND 0.021 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
54140Interchangeable
interchangeable cross-reference
interchangeable
783N1Interchangeable
interchangeable cross-reference
interchangeable
6858279Interchangeable
interchangeable cross-reference
interchangeable
LCA4-38LInterchangeable
interchangeable cross-reference
interchangeable
CTL4-38Interchangeable
interchangeable cross-reference
interchangeable
SF54140Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 54-140?
54-140 is a THERMAL RELEASE,CIRCUIT BREAKER manufactured by Tacens. It is classified as a MRO (MRO_GENERAL).
What parts can replace 54-140?
There are 12 known substitutes for 54-140: 54140, 783N1, 6858279 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 54-140?
54-140 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-118-2168. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026