Littelfuse 0312030.MXP Glass Cartridge Fuse 30A 32VAC Equivalent & Substitute Parts

Part Overview

The Littelfuse 0312030.MXP is a 30A 32VAC glass cartridge fuse designed for fast-blow protection in AC/DC circuits. This fuse requires a 3AB or 3AG holder and operates across a temperature range of -55°C to 125°C. The part is currently active in production with ROHS3 compliance and CSA/cULus approval. Equivalent and substitute parts are identified when they maintain identical electrical ratings, mechanical dimensions, and holder compatibility while meeting the same safety certifications.

Substiute Parts

0312030.MXP

Littelfuse Inc.In Stock: 20590312030.MXP Datasheet

Current PartRFQ

0312030.HXP

Littelfuse Inc.In Stock: 8750312030.HXP Datasheet

Parametric EquivalentRFQ

BK/AGC-30-R

Eaton - Electronics DivisionIn Stock: 1987BK/AGC-30-R Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the Littelfuse 0312030.MXP is determined by strict equivalence across the following parameters:

• Current Rating: 30 A (exact match required)
• Voltage Rating (AC): 32 V (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Fast Blow (exact match required)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (exact match required)
• Mounting Type: Requires Holder (exact match required)
• Operating Temperature Range: -55°C to 125°C (exact match required)
• RoHS Status: ROHS3 Compliant (exact match required)

The substitute parts listed below meet all these criteria and are therefore electrically and mechanically interchangeable with the main part number.

Parameter Comparison

Engineering Selection Recommendations

All three parts listed—0312030.MXP, 0312030.HXP, and BK/AGC-30-R—are active products with current manufacturing status and full regulatory compliance. The Littelfuse parts (0312030.MXP and 0312030.HXP) carry identical certifications (CSA, cULus) and are direct variants within the same manufacturer's 312 series. The Eaton BK/AGC-30-R carries CSA and UL approval, providing equivalent safety certification coverage. Selection between these parts may be based on availability, lead time, or existing supply chain relationships, as all meet the specified electrical and mechanical requirements for 30A 32VAC fast-blow cartridge fuse applications.

Frequently Asked Questions (FAQ)

Q: Can the 0312030.HXP be used as a direct replacement for the 0312030.MXP?

A: Yes. Both parts are manufactured by Littelfuse, share identical electrical ratings (30A, 32VAC), response time (fast blow), physical dimensions (1/4" x 1-1/4"), and holder compatibility (3AB, 3AG). Both carry CSA and cULus approval and operate across -55°C to 125°C.

Q: Is the Eaton BK/AGC-30-R compatible with the same holder as the Littelfuse 0312030.MXP?

A: Yes. The BK/AGC-30-R meets the same package specification (3AB, 3AG, 1/4" x 1-1/4") and physical dimensions (0.250" Dia x 1.250" L), ensuring mechanical compatibility with existing 3AB and 3AG holders.

Q: What are the key parameters that determine substitutability for this fuse?

A: Current rating (30A), voltage rating (32VAC), fuse type (cartridge glass), response time (fast blow), package designation (3AB, 3AG), physical dimensions (1/4" x 1-1/4"), and operating temperature range (-55°C to 125°C) must all match exactly. RoHS3 compliance and appropriate safety certifications are also required.

Q: Are there any differences in breaking capacity between these parts?

A: The Littelfuse parts specify 300A breaking capacity at rated voltage, while the Eaton BK/AGC-30-R specifies 1kA. Both exceed typical circuit protection requirements for 30A applications. This difference does not affect interchangeability for standard 30A 32VAC circuit protection.

Q: Do all three parts have the same DC cold resistance?

A: The Littelfuse parts (0312030.MXP and 0312030.HXP) specify 0.0019 Ohms DC cold resistance. The Eaton BK/AGC-30-R specifies 0.0024 Ohms. Both values are within acceptable ranges for 30A cartridge fuses and do not affect functional interchangeability.