Equivalent & Substitute Parts for BK/ABC-5 Ceramic Fuse Cartridge

Part Overview

The BK/ABC-5 is a 5 A ceramic fuse cartridge rated for 250 V AC and 125 V DC operation, designed for use with 3AB and 3AG holders. This component features fast-blow response characteristics and is manufactured by Eaton Electronics Division. The part is currently classified as obsolete, which necessitates identification of active equivalent and substitute components to maintain system functionality and ensure continued availability for replacement applications.

Key Parameters

Parameter	Value
Current Rating	5 A
Voltage Rating AC	250 V
Voltage Rating DC	125 V
Fuse Type	Cartridge, Ceramic
Response Time	Fast Blow
Package / Case	3AB, 3AG, 1/4" x 1-1/4" (6.35mm x 31.75mm)
Mounting Type	Requires Holder
Breaking Capacity @ Rated Voltage	200A AC, 10kA DC
Approval Agencies	CSA, UL
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the BK/ABC-5 is determined by strict equivalence across the following critical parameters: current rating (5 A), AC voltage rating (250 V), DC voltage rating (125 V), fuse type (ceramic cartridge), response time (fast blow), and physical package dimensions (3AB, 3AG, 1/4" x 1-1/4"). All substitute parts must maintain identical electrical specifications and mechanical compatibility with standard 3AB/3AG fuse holders.

The substitute parts are grouped into three categories:

Direct Manufacturer Equivalents (Eaton Electronics Division): Parts ABC-5-R, BK/ABC-5-R, BK1/ABC-5RX-R, and GBB-5-R are active Eaton products that meet all electrical and mechanical parameters of the obsolete BK/ABC-5. These parts are ROHS3 compliant and represent the primary replacement path.

Parametric Equivalents (Littelfuse Inc.): Parts 0314005.HXP, 0314005.MXP, 0314005.VXP, and 0332005.HXP are Littelfuse ceramic cartridge fuses meeting identical electrical specifications. These components provide cross-manufacturer alternatives with active product status.

Similar Alternative (SCHURTER Inc.): Part 0001.1031 is a glass cartridge fuse with matching current and AC voltage ratings. This component differs in fuse element material (glass versus ceramic) and has reduced breaking capacity (1.5kA versus 10kA DC), making it a functional alternative only where breaking capacity requirements are less stringent.

Parameter Comparison

Part Number	Manufacturer	Current (A)	Voltage AC (V)	Voltage DC (V)	Fuse Type	Response	Breaking Capacity AC	Breaking Capacity DC	Product Status	RoHS Status
BK/ABC-5	Eaton	5	250	125	Ceramic	Fast Blow	200A	10kA	Obsolete	Non-compliant
ABC-5-R	Eaton	5	250	125	Ceramic	Fast Blow	200A	10kA	Active	ROHS3
BK/ABC-5-R	Eaton	5	250	125	Ceramic	Fast Blow	200A	10kA	Active	ROHS3
BK1/ABC-5RX-R	Eaton	5	250	125	Ceramic	Fast Blow	200A	10kA	Active	ROHS3
BK/GBB-5-R	Eaton	5	250	125	Ceramic	Fast Blow	N/A	10kA	Active	ROHS3
GBB-5-R	Eaton	5	250	125	Ceramic	Fast Blow	200A	10kA	Active	ROHS3
0314005.HXP	Littelfuse	5	250	125	Ceramic	Fast Blow	750A	10kA	Active	ROHS3
0314005.MXP	Littelfuse	5	250	125	Ceramic	Fast Blow	750A	10kA	Active	ROHS3
0314005.VXP	Littelfuse	5	250	125	Ceramic	Fast Blow	750A	10kA	Active	ROHS3
0332005.HXP	Littelfuse	5	250	125	Ceramic	Fast Blow	100A	N/A	Obsolete	ROHS3
0001.1031	SCHURTER	5	250	N/A	Glass	Fast Blow	1.5kA	N/A	Obsolete	ROHS3

Engineering Selection Recommendations

Primary Substitutes (Recommended): ABC-5-R, BK/ABC-5-R, BK1/ABC-5RX-R, GBB-5-R, and 0314005.MXP are the preferred alternatives. These parts maintain full electrical and mechanical compatibility with the BK/ABC-5 while offering active product status and ROHS3 compliance. Eaton-manufactured alternatives (ABC-5-R, BK/ABC-5-R, BK1/ABC-5RX-R, GBB-5-R) provide direct manufacturer continuity. Littelfuse 0314005.MXP offers the highest inventory availability (6627 units) among active substitutes and carries expanded approval certifications (CE, CSA, K-MARK, PSE, UL).

Secondary Substitutes: 0314005.HXP and 0314005.VXP are functionally equivalent Littelfuse alternatives with active status and ROHS3 compliance. These parts differ only in approval agency certifications while maintaining identical electrical parameters.

Conditional Alternatives: 0332005.HXP (Littelfuse, obsolete) and 0001.1031 (SCHURTER, obsolete, glass type) are functional alternatives only where system requirements permit reduced breaking capacity or where DC voltage rating is not required. These parts should not be selected for new designs or where the original breaking capacity specification must be maintained.

Frequently Asked Questions (FAQ)

Q: Can ABC-5-R directly replace BK/ABC-5 in existing applications?

A: Yes. ABC-5-R is an active Eaton product with identical electrical ratings (5 A, 250 V AC, 125 V DC), matching ceramic cartridge construction, fast-blow response, and compatible 3AB/3AG package dimensions. The primary difference is product status (active versus obsolete) and ROHS3 compliance.

Q: What is the difference between BK/ABC-5-R and ABC-5-R?

A: Both are Eaton ABC series ceramic fuses with identical electrical specifications. BK/ABC-5-R is supplied in bulk packaging, while ABC-5-R may have different packaging configuration. Electrical performance and mechanical compatibility are equivalent.

Q: Are Littelfuse 0314005 series fuses compatible with 3AB/3AG holders?

A: Yes. All Littelfuse 0314005 series parts (0314005.HXP, 0314005.MXP, 0314005.VXP) are ceramic cartridge fuses with 1/4" x 1-1/4" dimensions, compatible with standard 3AB and 3AG fuse holders. These parts meet identical voltage and current specifications as the BK/ABC-5.

Q: Why does 0314005.MXP have higher breaking capacity (750A AC) than the original BK/ABC-5 (200A AC)?

A: Higher breaking capacity indicates enhanced fault protection capability. This does not affect normal operation or compatibility. The 0314005.MXP can safely interrupt higher fault currents while maintaining the same 5 A trip threshold for normal overcurrent conditions.

Q: Can the glass fuse 0001.1031 replace the ceramic BK/ABC-5?

A: 0001.1031 is a functional alternative only where DC voltage rating is not required and breaking capacity of 1.5kA is sufficient. This glass cartridge fuse has no DC voltage rating specification, making it unsuitable for applications requiring 125 V DC protection. The reduced breaking capacity also limits its use in high-fault-current environments.

Q: What is the significance of ROHS3 compliance in substitute selection?

A: ROHS3 compliance indicates the fuse meets current environmental and hazardous substance restrictions. The original BK/ABC-5 is non-compliant. Selecting ROHS3-compliant substitutes (ABC-5-R, BK/ABC-5-R, BK1/ABC-5RX-R, GBB-5-R, or Littelfuse 0314005 series) ensures compatibility with modern procurement and environmental standards.

Q: Are there inventory considerations when selecting substitutes?

A: Yes. 0314005.MXP has the highest inventory availability (6627 units), followed by BK/ABC-5-R (1643 units) and GBB-5-R (1089 units). For applications requiring immediate availability, 0314005.MXP is the optimal choice among active substitutes.

Q: Do all substitute parts require the same holder type?

A: Yes. All substitute parts listed are ceramic or glass cartridge fuses with 3AB/3AG package compatibility and 1/4" x 1-1/4" dimensions. They are mechanically interchangeable and require no holder modifications.

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