Equivalent & Substitute Parts for BK1/ABC-6-R Ceramic Fuse Cartridge

Part Overview

The BK1/ABC-6-R is a 6 A ceramic fuse cartridge rated for 250 V AC and 125 V DC operation, manufactured by Eaton - Electronics Division. This component is classified as obsolete, requiring identification of active equivalent and substitute parts for continued system support and procurement. The cartridge design requires a compatible holder (3AB, 3AG format) and is approved by CSA and UL standards. Locating parametrically equivalent alternatives ensures design continuity and supply chain reliability for applications utilizing this fast-blow fuse specification.

Key Parameters

Parameter	Value
Current Rating	6 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
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the BK1/ABC-6-R is determined by strict parametric matching across the following criteria:

Primary Matching Parameters:

Current Rating: 6 A (exact match required)
Voltage Rating - AC: 250 V (exact match required)
Voltage Rating - DC: 125 V (exact match required)
Fuse Type: Cartridge, Ceramic (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)

Secondary Considerations:

Approval Agency certifications (CSA, UL, UR, CE, K-MARK, PSE, KC)
Breaking Capacity at Rated Voltage
DC Cold Resistance
Melting I²t characteristics
Product Status (Active vs. Obsolete)

All identified substitutes maintain identical electrical and mechanical specifications as the main part. Variations in breaking capacity, resistance, and approval agencies are noted but do not preclude functional equivalence within the specified parameter set.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Series	Current Rating (A)	Voltage AC (V)	Voltage DC (V)	Response Time	Breaking Capacity AC	Breaking Capacity DC	Melting I²t	DC Cold Resistance (Ω)	Product Status	Approval Agency
BK1/ABC-6-R	Eaton - Electronics Division	ABC	6	250	125	Fast Blow	200 A	10 kA	58	0.021	Obsolete	CSA, UL
ABC-6-R	Eaton - Electronics Division	ABC	6	250	125	Fast Blow	200 A	10 kA	58	0.021	Active	CSA, UL
BK/ABC-6-R	Eaton - Electronics Division	ABC	6	250	125	Fast Blow	200 A	10 kA	58	0.021	Active	CSA, UL
BK/ABC-6NN-R	Eaton - Electronics Division	ABC	6	250	125	Fast Blow	200 A	10 kA	58	0.021	Active	CSA, UL
BK/GBB-6-R	Eaton - Electronics Division	GBB	6	250	125	Fast Blow	10 kA	10 kA	—	0.018	Active	CSA, UR
GBB-6-R	Eaton - Electronics Division	GBB	6	250	125	Fast Blow	200 A	10 kA	—	0.018	Active	CSA, UR
0314006.HXP	Littelfuse Inc.	314	6	250	125	Fast Blow	750 A	10 kA	45	0.024	Active	CE, CSA, K-MARK, PSE, UL
0314006.MXP	Littelfuse Inc.	314	6	250	125	Fast Blow	750 A	10 kA	45	0.024	Active	CE, CSA, K-MARK, PSE, UL
0314006.VXP	Littelfuse Inc.	314	6	250	125	Fast Blow	750 A	10 kA	45	0.024	Active	CE, CSA, KC, PSE, UL

Engineering Selection Recommendations

Eaton ABC Series (Active Status): ABC-6-R, BK/ABC-6-R, and BK/ABC-6NN-R are direct parametric equivalents to the obsolete BK1/ABC-6-R. All three maintain identical electrical specifications, breaking capacity, and resistance characteristics. These parts carry active product status and retain CSA and UL approvals. Selection among these three variants should be based on packaging availability and internal part numbering conventions within your procurement system.

Eaton GBB Series (Active Status): BK/GBB-6-R and GBB-6-R are parametrically equivalent alternatives from Eaton's GBB series. Both maintain the required 6 A, 250 V AC, 125 V DC ratings and fast-blow response. The GBB series exhibits lower DC cold resistance (0.018 Ω vs. 0.021 Ω) and carries CSA and UR approvals. GBB-6-R specifies 200 A AC breaking capacity, while BK/GBB-6-R specifies 10 kA AC breaking capacity. Both are suitable for direct substitution.

Littelfuse 314 Series (Active Status): 0314006.HXP, 0314006.MXP, and 0314006.VXP are parametrically equivalent alternatives from Littelfuse. All three maintain the required 6 A, 250 V AC, 125 V DC ratings and fast-blow response. The 314 series provides higher breaking capacity (750 A AC, 10 kA DC) and broader approval coverage (CE, CSA, K-MARK, PSE, UL, and KC for VXP variant). Operating temperature range is specified as -55°C to 125°C. These parts are suitable for direct substitution and offer enhanced performance margins.

Selection Priority: For immediate replacement of the obsolete BK1/ABC-6-R, prioritize active Eaton ABC series parts (ABC-6-R or BK/ABC-6-R) to maintain manufacturer continuity. If supply constraints exist, Littelfuse 314 series alternatives provide equivalent functionality with enhanced breaking capacity and broader certifications.

Frequently Asked Questions (FAQ)

Q: Can ABC-6-R directly replace BK1/ABC-6-R? A: Yes. ABC-6-R is a parametric equivalent with identical current rating (6 A), voltage ratings (250 V AC, 125 V DC), fuse type (ceramic cartridge), response time (fast blow), and package format (3AB, 3AG, 1/4" x 1-1/4"). The primary difference is product status: ABC-6-R is active while BK1/ABC-6-R is obsolete.

Q: What is the difference between Eaton ABC and GBB series fuses? A: Both series meet the specified 6 A, 250 V AC, 125 V DC parameters. The GBB series exhibits lower DC cold resistance (0.018 Ω vs. 0.021 Ω for ABC). Breaking capacity specifications vary by part number variant. Both series carry CSA approval; GBB carries UR certification while ABC carries UL certification.

Q: Are Littelfuse 314 series fuses compatible with Eaton fuse holders? A: Yes. Littelfuse 314 series parts (0314006.HXP, 0314006.MXP, 0314006.VXP) maintain the identical 3AB, 3AG package format (1/4" x 1-1/4" / 6.35mm x 31.75mm) and are mechanically compatible with holders designed for the BK1/ABC-6-R cartridge.

Q: What does "Fast Blow" response time mean? A: Fast Blow indicates the fuse will open quickly when current exceeds the rated 6 A threshold. All identified substitutes maintain this fast-blow characteristic, ensuring consistent circuit protection behavior.

Q: Why do Littelfuse parts show higher breaking capacity (750 A AC)? A: Breaking capacity represents the maximum fault current the fuse can safely interrupt. Littelfuse 314 series parts are rated for 750 A AC breaking capacity compared to 200 A AC for Eaton ABC series. This higher rating does not affect compatibility; it indicates enhanced performance margin under fault conditions.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All identified substitute parts maintain ROHS3 compliance, consistent with the original BK1/ABC-6-R specification.

Q: What certifications should I verify for my application? A: The original BK1/ABC-6-R carries CSA and UL approvals. Eaton ABC and GBB series maintain these certifications. Littelfuse 314 series parts carry broader certification coverage (CE, CSA, K-MARK, PSE, UL, and KC). Verify that your application requirements align with the certification profile of your selected substitute.

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