Littelfuse 0307020.M Glass Cartridge Fuse 20A 32VAC Equivalent & Substitute Parts

Part Overview

The Littelfuse 0307020.M is a 20 A, 32 V AC/DC fast-blow glass cartridge fuse in the 3AB/3AG package format (1/4" x 1-1/4"). This component is classified as Active product status and is designed for applications requiring reliable overcurrent protection in AC and DC circuits. The fuse requires a compatible holder for installation. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, and package specifications to ensure direct functional replacement in circuit protection applications.

Substiute Parts

0307020.M

Littelfuse Inc.In Stock: 11390307020.M Datasheet

Current PartRFQ

0312020.HXP

Littelfuse Inc.In Stock: 8610312020.HXP Datasheet

Parametric EquivalentRFQ

0312020.MXP

Littelfuse Inc.In Stock: 33770312020.MXP Datasheet

Parametric EquivalentRFQ

0312020.VXP

Littelfuse Inc.In Stock: 7200312020.VXP Datasheet

Parametric EquivalentRFQ

0SFE020.V

Littelfuse Inc.In Stock: 10380SFE020.V Datasheet

Parametric EquivalentRFQ

AGC-20-R

Eaton - Electronics DivisionIn Stock: 1124AGC-20-R Datasheet

Parametric EquivalentRFQ

BK/AGC-20-R

Eaton - Electronics DivisionIn Stock: 1742BK/AGC-20-R Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 0307020.M are qualified based on the following critical parameters that determine functional equivalence:

• Current Rating: 20 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)
• Size / Dimension: 0.250" Dia x 1.250" L (exact match required)
• Mounting Type: Requires Holder (exact match required)

All identified substitute parts meet these core electrical and mechanical parameters. Variations in secondary parameters such as breaking capacity, melting I²t, DC cold resistance, and operating temperature range do not affect the primary substitution criteria for this product category.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed are functionally equivalent to the 0307020.M based on matching electrical ratings, mechanical dimensions, and package specifications. Selection among equivalent parts should be based on the following factors:

Littelfuse Series 312 (0312020.HXP, 0312020.MXP, 0312020.VXP): These parts maintain Littelfuse manufacturer continuity and are ROHS3 compliant. All three carry CSA and UL or cULus approvals. The 0312020.MXP offers the highest current inventory (3300 pcs), followed by 0312020.HXP (759 pcs) and 0312020.VXP (702 pcs).

Littelfuse Series SFE (0SFE020.V): This part maintains the same series as the main part number and is ROHS3 compliant. However, it does not list approval agency certifications in the provided data.

Eaton AGC Series (AGC-20-R, BK/AGC-20-R): These parts provide cross-manufacturer equivalence with CSA and UL approvals. Both are ROHS3 compliant (BK/AGC-20-R) or RoHS compliant (AGC-20-R). The BK/AGC-20-R variant offers higher inventory availability (1731 pcs) compared to AGC-20-R (1022 pcs).

For applications requiring maintained manufacturer consistency, Littelfuse parts are preferred. For applications requiring cross-manufacturer flexibility, Eaton AGC series parts provide equivalent performance with established approvals.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 0307020.M with any of the listed equivalent parts?

A: Yes. All listed parts meet the critical substitution parameters: 20 A current rating, 32 V AC voltage rating, fast-blow response, glass cartridge type, 3AB/3AG package format, and 0.250" Dia x 1.250" L dimensions. They are mechanically and electrically interchangeable in applications designed for the 0307020.M.

Q: What is the difference between Littelfuse Series 312 and Series SFE parts?

A: Both series meet the electrical and mechanical specifications for substitution. Series 312 parts (0312020.HXP, 0312020.MXP, 0312020.VXP) provide additional technical data including breaking capacity (300A), melting I²t (1029), and operating temperature range (-55°C ~ 125°C). Series SFE parts (0SFE020.V) do not include these secondary specifications in the provided data.

Q: Can I use Eaton AGC-20-R parts as a substitute for Littelfuse 0307020.M?

A: Yes. The AGC-20-R and BK/AGC-20-R meet all critical electrical and mechanical parameters. Both carry CSA and UL approvals and are suitable for direct substitution in applications requiring 20 A, 32 V AC/DC fast-blow cartridge fuses in the 3AB/3AG package.

Q: Are there inventory considerations when selecting a substitute?

A: Yes. Inventory levels vary across equivalent parts. The 0312020.MXP offers the highest availability (3300 pcs), while 0312020.VXP has the lowest (702 pcs). The main part 0307020.M has 1110 pcs in stock. Eaton BK/AGC-20-R provides 1731 pcs availability.

Q: Do all substitute parts have the same approval certifications?

A: No. Approval agencies vary: Littelfuse 312 series parts carry CSA and cULus or UL approvals; Littelfuse SFE 0SFE020.V does not list approval agencies; Eaton AGC series parts carry CSA and UL approvals. Verify that the selected substitute meets the approval requirements of your application.

Q: What does "Requires Holder" mean for mounting type?

A: All listed parts are cartridge fuses that require a compatible fuse holder for installation. The holder must support the 3AB/3AG package format with 1/4" x 1-1/4" dimensions. The fuse cannot be used without a proper holder assembly.