Littelfuse 0322020.H Ceramic Fuse 20A 65VAC/VDC - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0322020.H is a 20 A ceramic cartridge fuse rated for 65 V AC and 65 V DC operation, designed for 3AB, 3AG holder compatibility with 1/4" x 1-1/4" dimensions. This part is classified as obsolete. Substitute parts are necessary to maintain circuit protection functionality in applications where the original part is no longer available through standard distribution channels.

Key Parameters

Parameter	Value
Manufacturer Part Number	0322020.H
Manufacturer	Littelfuse Inc.
Current Rating	20 A
Voltage Rating - AC	65 V
Voltage Rating - DC	65 V
Fuse Type	Cartridge, Ceramic
Response Time	Fast Blow
Package / Case	3AB, 3AG, 1/4" x 1-1/4"
Breaking Capacity @ Rated Voltage	200 A
DC Cold Resistance	0.0034 Ohms
Size / Dimension	0.250" Dia x 1.250" L (6.35mm x 31.75mm)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the 0322020.H is determined by the following critical parameters:

Direct Electrical Equivalents (Same Voltage & Current Rating):

Current Rating: 20 A
Voltage Rating - AC: 65 V
Voltage Rating - DC: 65 V
Fuse Type: Cartridge, Ceramic
Response Time: Fast Blow
Package / Case: 3AB, 3AG, 1/4" x 1-1/4"

Parts meeting all these criteria are classified as direct equivalents and can replace the 0322020.H without circuit modification.

Parametric Equivalents (Higher Voltage Rating, Same Current):

Current Rating: 20 A
Fuse Type: Cartridge, Ceramic
Response Time: Fast Blow
Package / Case: 3AB, 3AG, 1/4" x 1-1/4"
Voltage Rating - AC: 250 V or higher
Voltage Rating - DC: 125 V or higher

Parts with higher voltage ratings can operate in circuits designed for lower voltages. These are suitable for applications where the circuit voltage does not exceed the original specification.

Parameter Comparison

Part Number	Manufacturer	Current Rating (A)	Voltage AC (V)	Voltage DC (V)	Response Time	Breaking Capacity	DC Cold Resistance (Ω)	Product Status	RoHS Status
0322020.H	Littelfuse Inc.	20	65	65	Fast Blow	200 A	0.0034	Obsolete	Non-compliant
0322020.HXP	Littelfuse Inc.	20	65	65	Fast Blow	200 A AC, 1 kA DC	0.0034	Active	ROHS3 Compliant
0322020.MXP	Littelfuse Inc.	20	65	65	Fast Blow	200 A AC, 1 kA DC	0.0034	Active	ROHS3 Compliant
0322020.VXP	Littelfuse Inc.	20	65	65	Fast Blow	200 A AC, 1 kA DC	0.0034	Active	ROHS3 Compliant
BK/ABC-20RX	Eaton - Electronics Division	20	250	125	Fast Blow	400 A	0.00366	Active	Not specified
GBB-20-R	Eaton - Electronics Division	20	250	125	Fast Blow	200 A	0.0033	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Direct Electrical Equivalents):

The Littelfuse parts 0322020.HXP, 0322020.MXP, and 0322020.VXP are direct electrical equivalents to the 0322020.H. All three maintain identical current and voltage ratings (20 A, 65 V AC/DC) with the same ceramic cartridge construction and 3AB/3AG holder compatibility. These parts are currently in active production status with ROHS3 compliance and improved DC breaking capacity (1 kA DC versus 200 A on the original). Selection among these three variants is based on packaging and inventory availability.

Secondary Substitutes (Higher Voltage Rating):

The Eaton parts BK/ABC-20RX and GBB-20-R are parametric equivalents with higher voltage ratings (250 V AC, 125 V DC). These parts are suitable for replacement in circuits where the operating voltage does not exceed 65 V AC or 65 V DC. Both maintain the 20 A current rating, fast-blow response, and 3AB/3AG holder compatibility. The GBB-20-R offers ROHS3 compliance; the BK/ABC-20RX provides higher breaking capacity (400 A).

Frequently Asked Questions (FAQ)

Q: Can I use 0322020.HXP, 0322020.MXP, or 0322020.VXP interchangeably with 0322020.H?

A: Yes. These three Littelfuse parts are direct electrical equivalents with identical current ratings (20 A), voltage ratings (65 V AC/DC), fuse type (ceramic cartridge), response time (fast blow), and physical dimensions (1/4" x 1-1/4"). All are compatible with 3AB and 3AG holders. Selection depends on packaging format and availability.

Q: What is the difference between the Littelfuse direct equivalents and the Eaton substitutes?

A: The Littelfuse parts (0322020.HXP, 0322020.MXP, 0322020.VXP) match the original 0322020.H voltage specification exactly (65 V AC/DC). The Eaton parts (BK/ABC-20RX, GBB-20-R) have higher voltage ratings (250 V AC, 125 V DC) and are suitable for use in lower-voltage circuits but not recommended for circuits operating at the full 65 V specification unless voltage margin is required.

Q: Can I use BK/ABC-20RX or GBB-20-R in place of 0322020.H?

A: Yes, provided the circuit voltage does not exceed 65 V AC or 65 V DC. Both parts maintain the 20 A current rating and fast-blow response. Physical dimensions and holder compatibility (3AB/3AG, 1/4" x 1-1/4") are identical. The higher voltage rating provides additional safety margin in low-voltage applications.

Q: Are all substitute parts RoHS compliant?

A: The Littelfuse parts 0322020.HXP, 0322020.MXP, and 0322020.VXP are ROHS3 compliant. The Eaton part GBB-20-R is ROHS3 compliant. The Eaton part BK/ABC-20RX RoHS status is not specified in the available data.

Q: What is the difference in breaking capacity between the original and substitute parts?

A: The original 0322020.H has a breaking capacity of 200 A at rated voltage. The Littelfuse substitutes (0322020.HXP, 0322020.MXP, 0322020.VXP) provide 200 A AC and 1 kA DC breaking capacity. The Eaton BK/ABC-20RX provides 400 A breaking capacity. The Eaton GBB-20-R provides 200 A breaking capacity. Higher breaking capacity indicates improved fault current handling capability.

Q: Do all substitute parts fit the same holder?

A: Yes. All substitute parts are specified for 3AB and 3AG holder compatibility with identical physical dimensions (0.250" Dia x 1.250" L / 6.35mm x 31.75mm). Direct mechanical interchangeability is confirmed.

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