Circuit Breaker 30172-20 Equivalent & Substitute Parts

Part Overview

The Littelfuse 30172-20 is a 20A 24V DC automatic reset circuit breaker designed for chassis mount applications. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new design implementations. The 813 series breaker provides single-pole protection with automatic reset functionality suitable for DC power distribution in industrial and electronic equipment.

Substiute Parts

30172-20

Littelfuse Inc.In Stock: 114630172-20 Datasheet

Current PartRFQ

ACBP-V-20A

OptiFuseIn Stock: 7569ACBP-V-20A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 30172-20 is determined by the following critical parameters:

• Current Rating: 20A (exact match required)
• Actuator Type: Automatic Reset (functional requirement)
• Number of Poles: 1 (circuit configuration requirement)
• Voltage Rating - DC: Minimum 24V (equal or higher acceptable)
• Mounting Type: Chassis Mount (physical installation requirement)

The OptiFuse ACBP-V-20A qualifies as a direct substitute based on matching current rating (20A), automatic reset functionality, single-pole configuration, and chassis mount capability. The ACBP-V-20A operates at 32V DC, which exceeds the 24V requirement and provides enhanced voltage margin for system reliability.

Parameter Comparison

Engineering Selection Recommendations

The OptiFuse ACBP-V-20A is a qualified substitute for the obsolete Littelfuse 30172-20. Selection should be based on the following factors:

Product Status: The 30172-20 is obsolete with no ongoing manufacturing. The ACBP-V-20A is active production, ensuring long-term availability and supply chain continuity.

Compliance: The ACBP-V-20A meets ROHS3 compliance standards and holds certifications including IP 63, SAE J1171, and SAE J553. The original 30172-20 is RoHS non-compliant, making the substitute preferable for new designs and regulatory requirements.

Voltage Margin: The ACBP-V-20A operates at 32V DC versus the original 24V specification. This higher voltage rating provides additional safety margin and is compatible with 24V DC systems.

Functional Equivalence: Both components share identical current rating (20A), automatic reset operation, single-pole configuration, and chassis mount design, ensuring direct functional replacement.

Frequently Asked Questions (FAQ)

Q: Can the ACBP-V-20A replace the 30172-20 in existing 24V DC systems?

A: Yes. The ACBP-V-20A is rated for 32V DC operation and is fully compatible with 24V DC circuits. The higher voltage rating does not affect performance in lower voltage applications.

Q: What is the difference between the breaker types listed?

A: The 30172-20 uses standard circuit breaker technology, while the ACBP-V-20A is designated as a Shortstop breaker. Both provide automatic reset functionality and 20A protection; the Shortstop designation refers to OptiFuse's specific product line architecture.

Q: Are there packaging differences between these parts?

A: The 30172-20 is specified with "-" packaging notation, while the ACBP-V-20A is supplied in Bulk packaging. Both are chassis mount components with identical form factors suitable for direct installation.

Q: Does the RoHS compliance difference affect substitution?

A: The ACBP-V-20A's ROHS3 compliance is advantageous for new designs and systems subject to environmental regulations. For legacy system maintenance, either part functions identically; however, the compliant substitute is recommended for long-term reliability and regulatory alignment.

Q: What certifications apply to the substitute part?

A: The ACBP-V-20A holds IP 63 environmental protection rating, SAE J1171 (automotive electrical systems), and SAE J553 (automotive circuit protection) certifications, providing enhanced reliability documentation for critical applications.