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419803 — CIRCUIT BREAKER

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

419803: CIRCUIT BREAKER.

The CIRCUIT BREAKER is a the manufacturer industrial component. Key specifications include body_style: RECTANGULAR DIMENSIONAL ENVELOPE, reset_method: AUTOMATIC AND MANUAL, overall_width: 26.438 INCHES NOMINAL IN, overall_height: 25.000 INCHES NOMINAL IN, overall_length: 25.000 INCHES NOMINAL IN, special_features: OPERATION AUTOMATIC;TYPE ACB4000HR;450 VOLTS AC;60 HZ;CONTROL VOLTS 120AC;FRAME SIZE 4000. This part is cataloged in the U.S.

Government catalog under NSN 5925-01-256-8511, 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
MRO→ MRO_GENERAL→ 419803
NSN: 5925-01-256-8511
NIINs: 012568511, 013097354, 013202767, 013221146, 013245259, 013245260, 013366879, 013366881, 013366882
FSC: 5925 — Circuit Breakers
CAGE: 39805 — WHIPP & BOURNE INC. (USA)
SPECIFICATIONS
body_styleRECTANGULAR DIMENSIONAL ENVELOPE
reset_methodAUTOMATIC AND MANUAL
overall_width26.438 INCHES NOMINAL IN
pole_quantity3
overall_height25.000 INCHES NOMINAL IN
overall_length25.000 INCHES NOMINAL IN
special_featuresOPERATION AUTOMATIC;TYPE ACB4000HR;450 VOLTS AC;60 HZ;CONTROL VOLTS 120AC;FRAME SIZE 4000
features_providedTRIP INDICATOR
frequency_in_hertz60.0 ALL LOCATIONS
mounting_slot_width3.375 INCHES NOMINAL IN
trip_release_methodMAGNETIC ALL LOCATIONS
circuit_protection_typeOVERCURRENT ALL LOCATIONS
NSN5925-01-256-8511
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CIRCUIT BREAKER TITLE COMPONENT PN 419803 MFR CIRCUIT BREAKER
KEY FEATURES
•
OPERATING VOLTAGE TYPE AND RATING PER POLE IN VOLTS: 500.0 AC ALL LOCATIONS
•
FREQUENCY IN HERTZ: 60.0 ALL LOCATIONS
•
CIRCUIT PROTECTION TYPE: UNDERVOLTAGE ALL LOCATIONS
•
POLE QUANTITY: 33
TECHNICAL CHARACTERISTICS
OPERATING VOLTAGE TYPE AND RATING PER POLE IN VOLTS500.0 AC ALL LOCATIONS
FREQUENCY IN HERTZ60.0 ALL LOCATIONS
CIRCUIT PROTECTION TYPEUNDERVOLTAGE ALL LOCATIONS
POLE QUANTITY33
SUBSTITUTES & CROSS-REFERENCES 1
4294016-3Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 419803?
419803 is a CIRCUIT BREAKER. It is classified as a MRO (MRO_GENERAL).
What parts can replace 419803?
There is 1 known substitute for 419803: 4294016-3. Substitute compatibility should be verified for your specific system.
What is the NSN for 419803?
419803 is cataloged in the U.S. Government catalog under NSN 5925-01-256-8511. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.