Littelfuse 54000-03 Rocker Switch SPST 10A 12V - Equivalent & Substitute Parts

Part Overview

The Littelfuse 54000-03 is a panel-mount rocker switch with SPST (Single Pole Single Throw) configuration, rated for 10A DC at 12V. This component is classified as obsolete, making identification of compatible substitute parts essential for ongoing system maintenance and new design implementations. The switch features a concave black actuator with ON/OFF horizontal marking and quick-connect 0.250" (6.3mm) termination suitable for standard panel cutout dimensions of 28.57mm x 13.97mm.

Substiute Parts

54000-03

Littelfuse Inc.In Stock: 79954000-03 Datasheet

Current PartRFQ

C1300ARBB-602AW

BulginIn Stock: 7546C1300ARBB-602AW Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Littelfuse 54000-03 is determined by the following critical parameters:

• Circuit Configuration: Must remain SPST (Single Pole Single Throw)
• Switch Function: Must maintain On-Off operation
• Mounting Type: Panel Mount, Snap-In configuration required
• Termination Style: Quick Connect - 0.250" (6.3mm) connector compatibility
• Panel Cutout Dimensions: Rectangular aperture within acceptable tolerance of 28.57mm x 13.97mm
• Current and Voltage Ratings: Substitute must meet or exceed 10A DC at 12V minimum specification
• RoHS Compliance: ROHS3 Compliant status maintained

The Bulgin C1300ARBB-602AW qualifies as a direct substitute based on matching circuit topology, mounting configuration, termination style, and panel cutout compatibility. The substitute provides enhanced electrical ratings (20A AC/DC at 250V AC / 24V DC), ensuring full backward compatibility with the original application while offering superior performance headroom.

Parameter Comparison

Engineering Selection Recommendations

The Bulgin C1300ARBB-602AW is the qualified substitute for the obsolete Littelfuse 54000-03. Selection is based on the following engineering criteria:

Functional Compatibility: Both components maintain identical SPST circuit topology and On-Off switch function, ensuring direct functional equivalence in control applications.

Mechanical Interchangeability: Panel cutout dimensions are within acceptable tolerance (28.60mm x 14.10mm versus 28.57mm x 13.97mm), and both employ identical quick-connect 0.250" (6.3mm) termination, enabling direct mechanical replacement without panel modification.

Electrical Performance: The Bulgin substitute provides superior electrical ratings (20A AC/DC at 250V AC / 24V DC) compared to the original specification (10A DC at 12V), ensuring full backward compatibility and enhanced performance margin for the original application.

Compliance and Certification: The Bulgin C1300ARBB-602AW maintains ROHS3 compliance equivalent to the original part and includes CSA and UL approvals, providing regulatory assurance for industrial and commercial applications.

Product Availability: The substitute is classified as Active with 7489 units in stock, ensuring reliable supply continuity for replacement and new production requirements.

Frequently Asked Questions (FAQ)

Q: Can the Bulgin C1300ARBB-602AW directly replace the Littelfuse 54000-03 without modification?

A: Yes. Both components share identical SPST circuit configuration, panel-mount snap-in mechanical design, quick-connect 0.250" (6.3mm) termination, and compatible panel cutout dimensions within standard tolerance. Direct mechanical and electrical substitution is possible without circuit or panel modifications.

Q: What are the key differences between these two switches?

A: The primary differences are current and voltage ratings. The Bulgin substitute is rated for 20A AC/DC at 250V AC / 24V DC, compared to the original 10A DC at 12V specification. The Bulgin also includes CSA and UL certifications and is currently in active production, whereas the Littelfuse part is obsolete. Actuator marking differs (O - versus ON OFF), but functional operation remains identical.

Q: Are the panel cutout dimensions compatible?

A: Yes. The Littelfuse 54000-03 requires a 28.57mm x 13.97mm rectangular cutout, while the Bulgin C1300ARBB-602AW requires 28.60mm x 14.10mm. These dimensions are within standard mechanical tolerance for panel-mount snap-in switches and are considered interchangeable for practical installation purposes.

Q: Does the substitute maintain RoHS compliance?

A: Yes. The Bulgin C1300ARBB-602AW is ROHS3 Compliant, matching the compliance status of the original Littelfuse 54000-03.

Q: What is the termination compatibility?

A: Both switches use Quick Connect - 0.250" (6.3mm) termination, ensuring direct connector compatibility without adapter requirements or wiring modifications.

Q: Is the higher voltage and current rating of the substitute a concern for the original application?

A: No. Higher electrical ratings provide additional performance margin and do not create compatibility issues. The substitute will operate safely in applications originally designed for the lower-rated Littelfuse component, as it exceeds the original specifications.