Equivalent & Substitute Parts for ABC-1/8-R Ceramic Cartridge Fuse

Part Overview

The ABC-1/8-R is a 125 mA ceramic cartridge fuse rated for 250 V AC and 125 V DC operation, manufactured by Eaton - Electronics Division. This component is classified as obsolete, necessitating identification of active equivalent parts for continued system support and procurement. The fuse requires a compatible holder (3AB, 3AG format) and is designed for fast-blow response characteristics in circuit protection applications.

Substiute Parts

ABC-1/8-R

Eaton - Electronics DivisionIn Stock: 756ABC-1/8-R Datasheet

Current PartRFQ

ABC-18-R

Eaton - Electronics DivisionIn Stock: 1115ABC-18-R Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ABC-1/8-R is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Parameters (Must Match):

• Current Rating: 125 mA
• Voltage Rating - AC: 250 V
• Voltage Rating - DC: 125 V
• Response Time: Fast Blow
• Approval Agency: CSA, UL

Mechanical Parameters (Must Match):

• Fuse Type: Cartridge, Ceramic
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4"
• Size / Dimension: 0.250" Dia x 1.250" L (6.35mm x 31.75mm)
• Mounting Type: Requires Holder

Compliance Parameters (Must Match):

• RoHS Status: ROHS3 Compliant

The ABC-18-R meets all substitution criteria as an active equivalent part manufactured by the same supplier (Eaton - Electronics Division) within the same ABC series.

Parameter Comparison

Engineering Selection Recommendations

The ABC-18-R is a direct electrical and mechanical equivalent to the obsolete ABC-1/8-R. Both components share identical current ratings, voltage ratings, response characteristics, physical dimensions, and holder compatibility. Both parts maintain CSA and UL approval certifications and comply with ROHS3 requirements.

The ABC-18-R carries active product status, ensuring continued availability and supply chain support. The substitute part provides additional specification data (Breaking Capacity of 400A and Melting I²t of 400) not documented for the original part, offering enhanced technical documentation for system design verification.

Selection of the ABC-18-R for replacement applications is based on complete parametric equivalence and active manufacturing status.

Frequently Asked Questions (FAQ)

Q: Can the ABC-18-R be used as a direct replacement for the ABC-1/8-R?

A: Yes. The ABC-18-R is a parametric equivalent. Both parts share identical current ratings (125 mA), voltage ratings (250 V AC / 125 V DC), fuse type (Cartridge, Ceramic), response time (Fast Blow), physical dimensions (0.250" Dia x 1.250" L), holder compatibility (3AB, 3AG), and regulatory approvals (CSA, UL).

Q: What is the primary reason for substitution?

A: The ABC-1/8-R is classified as obsolete. The ABC-18-R is an active product from the same manufacturer and series, ensuring long-term availability and supply continuity.

Q: Are there any mechanical compatibility concerns?

A: No. Both parts use identical 3AB and 3AG holder formats and share the same physical dimensions (0.250" Dia x 1.250" L / 6.35mm x 31.75mm). No holder modifications are required.

Q: Do both parts meet the same regulatory standards?

A: Yes. Both the ABC-1/8-R and ABC-18-R carry CSA and UL approvals and comply with ROHS3 requirements.

Q: What additional information is provided for the ABC-18-R?

A: The ABC-18-R includes specified Breaking Capacity (400A) and Melting I²t (400) values. These parameters were not documented for the original ABC-1/8-R but do not alter the substitution equivalence.

Q: Is packaging format a consideration?

A: The ABC-1/8-R is listed with unspecified packaging, while the ABC-18-R is supplied in Bulk format. Both parts are identical in electrical and mechanical specifications. Packaging format does not affect functional compatibility.