GBB-2-R Ceramic Fuse Cartridge: Equivalent & Substitute Parts

Part Overview

The GBB-2-R is a 2 A ceramic fuse cartridge manufactured by Eaton - Electronics Division, rated for 250 V AC and 125 V DC operation. This fast-blow cartridge fuse requires a compatible holder (3AB, 3AG format) and is designed for circuit protection in industrial and commercial applications. The part maintains active product status with ROHS3 compliance and CSA/UR approval certifications.

Substitute parts become necessary when the primary GBB-2-R is unavailable, when alternative manufacturers are preferred for supply chain optimization, or when equivalent performance specifications allow cross-platform component selection without compromising circuit protection requirements.

Key Parameters

Parameter	Value
Current Rating	2 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
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility for the GBB-2-R is determined by strict alignment with the following electrical and mechanical parameters:

Critical Matching Parameters:

Current Rating: 2 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)

All identified substitute parts meet these mandatory criteria. Variations in secondary parameters such as breaking capacity, DC cold resistance, melting I²t, and approval agency certifications do not disqualify substitution when primary electrical and mechanical specifications align.

Parameter Comparison

Parameter	GBB-2-R (Eaton)	BK/GBB-2-R (Eaton)	BK/ABC-2-R (Eaton)	0314002.HXP (Littelfuse)	0314002.MXP (Littelfuse)	0314002.VXP (Littelfuse)
Manufacturer	Eaton - Electronics Division	Eaton - Electronics Division	Eaton - Electronics Division	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.
Current Rating (Amps)	2 A	2 A	2 A	2 A	2 A	2 A
Voltage Rating - AC	250 V	250 V	250 V	250 V	250 V	250 V
Voltage Rating - DC	125 V	125 V	125 V	125 V	125 V	125 V
Fuse Type	Cartridge, Ceramic	Cartridge, Ceramic	Cartridge, Ceramic	Cartridge, Ceramic	Cartridge, Ceramic	Cartridge, Ceramic
Response Time	Fast Blow	Fast Blow	Fast Blow	Fast Blow	Fast Blow	Fast Blow
Package / Case	3AB, 3AG, 1/4" x 1-1/4"	3AB, 3AG, 1/4" x 1-1/4"	3AB, 3AG, 1/4" x 1-1/4"	3AB, 3AG, 1/4" x 1-1/4"	3AB, 3AG, 1/4" x 1-1/4"	3AB, 3AG, 1/4" x 1-1/4"
Size / Dimension	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)
Mounting Type	Requires Holder	Requires Holder	Requires Holder	Requires Holder	Requires Holder	Requires Holder
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Active
Breaking Capacity @ Rated Voltage	200A AC, 10kA DC	10kA	100A AC, 10kA DC	100A AC, 10kA DC	100A AC, 10kA DC	100A AC, 10kA DC
DC Cold Resistance (Ohms)	0.0662	0.0662	0.089	0.07	0.07	0.07
Approval Agency	CSA, UR	CSA, UR	CSA, UL	CE, CSA, PSE, UL	CE, CSA, PSE, UL	CE, CSA, PSE, UL
Operating Temperature	Not specified	Not specified	Not specified	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C

Engineering Selection Recommendations

Eaton GBB Series (BK/GBB-2-R): This direct manufacturer variant maintains identical electrical specifications and physical dimensions to the primary GBB-2-R. Both parts carry CSA and UR certifications. Selection of BK/GBB-2-R is appropriate when Eaton supply chain continuity is prioritized and inventory availability permits.

Eaton ABC Series (BK/ABC-2-R): This parametric equivalent from Eaton's ABC series meets all critical electrical and mechanical requirements. The part carries CSA and UL certifications (UL replaces UR from the primary part). DC cold resistance is 0.089 Ohms compared to 0.0662 Ohms in the GBB-2-R. Breaking capacity is specified as 100A AC and 10kA DC. Selection is appropriate when ABC series standardization is preferred within an organization.

Littelfuse 314 Series (0314002.HXP, 0314002.MXP, 0314002.VXP): All three Littelfuse variants meet identical electrical and mechanical specifications. These parts carry expanded certifications including CE, CSA, PSE, and UL. Operating temperature range is specified as -55°C to 125°C. DC cold resistance is 0.07 Ohms. Breaking capacity is 100A AC and 10kA DC. Melting I²t is specified as 11. Selection is appropriate when multi-certification compliance or extended temperature operation is required, or when Littelfuse supply chain is preferred.

All substitute parts maintain active product status and ROHS3 compliance. Selection among substitutes should be based on organizational supply chain preferences, certification requirements, and inventory availability.

Frequently Asked Questions (FAQ)

Q: Can BK/GBB-2-R be used as a direct replacement for GBB-2-R?

A: Yes. BK/GBB-2-R is a direct manufacturer variant with identical electrical ratings (2 A, 250 V AC, 125 V DC), fuse type (ceramic cartridge), response time (fast blow), and physical dimensions (3AB, 3AG, 1/4" x 1-1/4"). Both parts require the same holder and carry CSA and UR certifications.

Q: What is the difference between Eaton GBB and ABC series fuses?

A: Both series meet the same electrical specifications (2 A, 250 V AC, 125 V DC) and physical package requirements. The ABC series carries UL certification instead of UR. DC cold resistance differs slightly (0.089 Ohms for ABC versus 0.0662 Ohms for GBB). Breaking capacity for ABC is specified as 100A AC and 10kA DC.

Q: Are Littelfuse 314 series fuses compatible with Eaton GBB holders?

A: Yes. Littelfuse 0314002.HXP, 0314002.MXP, and 0314002.VXP all conform to the 3AB, 3AG package format with identical physical dimensions (0.250" Dia x 1.250" L). These parts are mechanically and electrically compatible with holders designed for the GBB-2-R.

Q: What certifications do Littelfuse 314 series fuses carry?

A: Littelfuse 314 series fuses (0314002.HXP, 0314002.MXP, 0314002.VXP) carry CE, CSA, PSE, and UL certifications. This represents broader international compliance compared to the GBB-2-R (CSA, UR) and BK/ABC-2-R (CSA, UL).

Q: Do all substitute parts have the same operating temperature range?

A: No. The Eaton GBB-2-R and BK/ABC-2-R do not specify an operating temperature range. Littelfuse 314 series parts specify -55°C to 125°C operating temperature. Applications requiring operation outside standard ambient conditions should specify Littelfuse variants.

Q: Are there differences in DC cold resistance among the substitute parts?

A: Yes. GBB-2-R and BK/GBB-2-R have 0.0662 Ohms DC cold resistance. BK/ABC-2-R has 0.089 Ohms. Littelfuse 314 series (0314002.HXP, 0314002.MXP, 0314002.VXP) have 0.07 Ohms. These variations are within acceptable tolerance for ceramic cartridge fuses in this current rating.

Q: What is the melting I²t specification and why does it matter?

A: Melting I²t characterizes the thermal energy required to melt the fuse element. GBB-2-R does not specify this parameter. BK/ABC-2-R specifies 2.167. Littelfuse 314 series specifies 11. Higher I²t values indicate slower thermal response. For fast-blow applications, the specified values are appropriate for 2 A circuit protection.

Q: Can these fuses be used interchangeably in the same circuit?

A: Yes, provided the circuit holder is compatible with the 3AB, 3AG package format. All substitute parts meet identical electrical specifications (2 A, 250 V AC, 125 V DC) and fast-blow response time. Physical dimensions are identical. Interchangeability is confirmed for the specified package format.

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