Equivalent & Substitute Parts for BK/ABC-30

Part Overview

The BK/ABC-30 is a 30 A ceramic cartridge fuse rated for 250 V AC and 125 V DC operation with fast-blow response characteristics. This component is classified as obsolete and requires a compatible fuse holder (3AB, 3AG, 1/4" x 1-1/4"). Due to its obsolete product status, equivalent and substitute parts from active product lines are necessary to ensure continued availability and system reliability in applications requiring 30 A ceramic fuse cartridges with matching electrical and mechanical specifications.

Key Parameters

Parameter	Value
Current Rating	30 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"
Size / Dimension	0.250" Dia x 1.250" L (6.35mm x 31.75mm)
Mounting Type	Requires Holder
Melting I²t	1429 (Eaton series); 2490 (Littelfuse series)

Substitute Part Grouping Explanation

Substitution for the BK/ABC-30 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Current Rating: 30 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"
Size / Dimension: 0.250" Dia x 1.250" L (6.35mm x 31.75mm)
Mounting Type: Requires Holder

All substitute parts listed meet these mandatory parameters. Variations in breaking capacity, DC cold resistance, and melting I²t values do not preclude substitution when all mandatory parameters align. Substitute parts are grouped by manufacturer (Eaton Electronics Division and Littelfuse Inc.) and product status (Active vs. Obsolete).

Parameter Comparison

Part Number	Manufacturer	Series	Current (A)	Voltage AC (V)	Voltage DC (V)	Response	Breaking Capacity AC	Breaking Capacity DC	Melting I²t	DC Cold Resistance (Ω)	Product Status	RoHS Status
BK/ABC-30	Eaton	ABC	30	250	125	Fast Blow	1 kA	400 A	1429	0.002225	Obsolete	Non-compliant
ABC-30-R	Eaton	ABC	30	250	125	Fast Blow	200 A	400 A	1429	0.002225	Active	ROHS3 Compliant
BK/ABC-30-R	Eaton	ABC	30	250	125	Fast Blow	200 A	400 A	1429	0.002225	Active	ROHS3 Compliant
BK1/ABC-30NX-R	Eaton	ABC	30	250	125	Fast Blow	200 A	400 A	1429	0.002225	Active	ROHS3 Compliant
BK/GBB-30-R	Eaton	GBB	30	250	125	Fast Blow	10 kA	Not specified	1429	0.002	Active	ROHS3 Compliant
GBB-30-R	Eaton	GBB	30	250	125	Fast Blow	200 A	Not specified	Not specified	0.00206	Active	ROHS3 Compliant
0314030.HXP	Littelfuse	314	30	250	125	Fast Blow	100 A	400 A	2490	0.00182	Active	ROHS3 Compliant
0314030.MXP	Littelfuse	314	30	250	125	Fast Blow	100 A	400 A	2490	0.00182	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Eaton Electronics Division - ABC Series):

ABC-30-R, BK/ABC-30-R, and BK1/ABC-30NX-R are direct active-status replacements from Eaton's ABC series. These parts maintain identical electrical characteristics (current, voltage, response time, melting I²t) and mechanical compatibility with the obsolete BK/ABC-30. ABC-30-R and BK/ABC-30-R are ROHS3 compliant with REACH Unaffected status. BK1/ABC-30NX-R carries UR approval in addition to CSA certification. All three are suitable for direct substitution in applications previously using BK/ABC-30.

Secondary Substitutes (Eaton Electronics Division - GBB Series):

BK/GBB-30-R and GBB-30-R are parametric equivalents from Eaton's GBB series. These parts meet all mandatory electrical and mechanical parameters. BK/GBB-30-R offers enhanced breaking capacity (10 kA AC) compared to the original part. Both are ROHS3 compliant and carry CSA and UR approvals. GBB-30-R carries CSA and UR approvals. These substitutes are appropriate when higher breaking capacity is acceptable or required by system design.

Cross-Manufacturer Substitutes (Littelfuse Inc. - 314 Series):

0314030.HXP and 0314030.MXP are parametric equivalents from Littelfuse's 314 series. Both parts satisfy all mandatory electrical and mechanical requirements. These parts feature extended operating temperature range (-55°C to 125°C), higher melting I²t (2490 vs. 1429), and lower DC cold resistance (0.00182 Ω). Both are ROHS3 compliant with REACH Unaffected status and carry CE, K-MARK, PSE, and UL approvals. These substitutes are appropriate for applications requiring broader temperature performance or cross-manufacturer sourcing flexibility.

Frequently Asked Questions (FAQ)

Q: Can ABC-30-R be used as a direct replacement for BK/ABC-30?

A: Yes. ABC-30-R meets all mandatory electrical parameters (30 A, 250 V AC, 125 V DC, fast-blow response) and mechanical specifications (3AB/3AG package, 0.250" Dia x 1.250" L). ABC-30-R is an active product with ROHS3 compliance, making it a suitable direct replacement for the obsolete BK/ABC-30.

Q: What is the difference between ABC-30-R and BK/ABC-30-R?

A: Both parts are from Eaton's ABC series and share identical electrical characteristics and mechanical compatibility. The primary difference is packaging designation and inventory availability. BK/ABC-30-R has higher inventory (2200 pcs) compared to ABC-30-R (879 pcs). Both are ROHS3 compliant and active products suitable for substitution.

Q: Why do Littelfuse 314 series fuses have different melting I²t values?

A: The Littelfuse 314 series (0314030.HXP and 0314030.MXP) have melting I²t of 2490 compared to 1429 for Eaton ABC series. This difference reflects different thermal characteristics within the same current and voltage ratings. Both values are provided by manufacturers and do not preclude substitution when all mandatory electrical and mechanical parameters match.

Q: Are Littelfuse 0314030.HXP and 0314030.MXP interchangeable?

A: Yes. Both parts are from Littelfuse's 314 series with identical electrical ratings (30 A, 250 V AC, 125 V DC), mechanical specifications (3AB/3AG, 0.250" Dia x 1.250" L), and performance characteristics (melting I²t 2490, DC cold resistance 0.00182 Ω). Both are active products with ROHS3 compliance and identical approvals.

Q: Can BK/GBB-30-R be used in place of BK/ABC-30?

A: Yes. BK/GBB-30-R meets all mandatory electrical and mechanical parameters. The GBB series offers enhanced breaking capacity (10 kA AC) compared to the original BK/ABC-30 (1 kA AC). This higher breaking capacity does not prevent substitution and may provide additional protection margin in the application.

Q: What certifications should I verify for my application?

A: Verify that the substitute part carries the required approvals for your application. BK/ABC-30 carries CSA and UL approvals. Active substitutes carry CSA, UL, UR, CE, K-MARK, and PSE certifications depending on series and manufacturer. Confirm that the selected substitute's certification set meets your system requirements.

Q: Does RoHS compliance affect substitution eligibility?

A: The original BK/ABC-30 is RoHS non-compliant. All active substitute parts (ABC-30-R, BK/ABC-30-R, BK1/ABC-30NX-R, BK/GBB-30-R, GBB-30-R, 0314030.HXP, 0314030.MXP) are ROHS3 compliant. If your application or system requires RoHS compliance, any of these active substitutes is appropriate.

Q: Are there any mechanical compatibility concerns with these substitutes?

A: No. All substitute parts share identical package specifications (3AB, 3AG, 1/4" x 1-1/4") and physical dimensions (0.250" Dia x 1.250" L / 6.35mm x 31.75mm). All require the same holder type. Mechanical compatibility is assured across all listed substitutes.

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