Equivalent & Substitute Parts Reference: Littelfuse 551842

Part Overview

The Littelfuse/Commercial Vehicle Products 551842 is a panel mount SPDT toggle switch rated for 15A at 24V DC with a standard round actuator and screw terminal connections. It is currently classified as obsolete, which necessitates the identification of alternative models with equivalent electrical and mechanical parameters to ensure continued functionality in legacy designs or maintenance applications.

Substiute Parts

551842

Littelfuse/Commercial Vehicle ProductsIn Stock: 880551842 Datasheet

Current PartRFQ

5586

Littelfuse/Commercial Vehicle ProductsIn Stock: 6855586 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts are identified by matching all key electrical and mechanical parameters provided. The following attributes are those which must be identical or within allowable tolerances for a valid substitute in this toggle switch category:

• Mounting Type
• Circuit Type (SPDT)
• Switch Function (On-Off-On)
• Current Rating (15A DC)
• Voltage Rating - DC (24V)
• Actuator Type (Standard Round)
• Actuator Length
• Illumination (Non-Illuminated)
• Termination Style (Screw Terminal)
• Panel Cutout Dimensions (Circular - 11.90mm Dia)
• Bushing Thread (15/32-32)
• Actuator Material
• Compliance (RoHS, REACH)

Each of these parameters is directly compared to ensure substition suitability without assumption or extrapolation.

Parameter Comparison

Engineering Selection Recommendations

The Littelfuse 551842 is marked as obsolete, while the Littelfuse 5586 is listed as active and available. Both parts are RoHS3 compliant and REACH unaffected, with identical moisture sensitivity levels (MSL 1, Unlimited). These compliance statuses support direct substitution when regulatory adherence and lifecycle status are required selection factors.

Frequently Asked Questions (FAQ)

Q1: What are the electrical and mechanical substitution criteria for Littelfuse 551842?
A1: Substitution requires matching mounting type, SPDT circuit, On-Off-On function, 15A DC current rating, 24V DC rating, standard round actuator, actuator length, termination style, panel cutout, bushing thread, actuator material, and compliance attributes.

Q2: Is the substitute part 5586 compatible in panel cutout and mounting hardware?
A2: Both 551842 and 5586 have identical panel cutout dimensions (circular - 11.90mm diameter) and bushing thread (15/32-32), supporting direct mechanical compatibility.

Q3: Are there differences to consider in actuator specifications?
A3: The only parameter difference in actuator specification is actuator length (26.75mm for 551842 vs. 17.46mm for 5586) and material finish (Chrome Plated vs. Nickel Plated). All other actuator features match the main part.

Q4: Are both Littelfuse 551842 and 5586 compliant with RoHS and REACH?
A4: Both parts are RoHS3 compliant and REACH unaffected.

Q5: What packaging and availability differences exist?
A5: 551842 inventory is listed as 870 pieces (new original, in stock), and 5586 inventory is 641 pieces (bulk packaging, new original, in stock).