BK/AGC-2RX Glass Cartridge Fuse 2A 250VAC Equivalent & Substitute Parts

Part Overview

The BK/AGC-2RX is a 2 A, 250 V AC/DC fast-blow glass cartridge fuse manufactured by Eaton - Electronics Division. This component is designed for use in 3AB and 3AG fuse holders with dimensions of 1/4" x 1-1/4" (6.35mm x 31.75mm). The part maintains active product status with 1132 pieces in current inventory.

Equivalent and substitute parts are identified when identical electrical and mechanical parameters are maintained across manufacturers. This reference enables component selection flexibility while ensuring circuit protection performance remains consistent with original design specifications.

Key Parameters

Parameter	Value
Current Rating	2 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Fast Blow
Package / Case	3AB, 3AG, 1/4" x 1-1/4"
Breaking Capacity @ Rated Voltage	100 A
Operating Temperature Range	-55°C ~ 125°C
Size / Dimension	0.250" Dia x 1.250" L (6.35mm x 31.75mm)
Mounting Type	Requires Holder
Approval Agencies	CSA, UL

Substitute Part Grouping Explanation

Substitution eligibility for the BK/AGC-2RX is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Parameters:

Current Rating: 2 A
Voltage Rating (AC): 250 V
Fuse Type: Cartridge, Glass
Response Time: Fast Blow
Package / Case: 3AB, 3AG, 1/4" x 1-1/4"
Breaking Capacity @ Rated Voltage: 100 A
Operating Temperature Range: -55°C ~ 125°C
Size / Dimension: 0.250" Dia x 1.250" L (6.35mm x 31.75mm)

All identified substitute parts maintain these parameters without deviation. Variations in secondary characteristics such as melting I²t, DC cold resistance, and manufacturer-specific compliance certifications do not affect substitution validity when primary electrical and mechanical parameters remain identical.

Parameter Comparison

Part Number	Manufacturer	Current Rating (A)	Voltage Rating (V AC)	Response Time	Breaking Capacity (A)	Size (Dia x L)	Operating Temp (°C)	DC Cold Resistance (Ohms)	Melting I²t	Product Status
BK/AGC-2RX	Eaton - Electronics Division	2	250	Fast Blow	100	0.250" x 1.250"	-55 ~ 125	0.063	17.52	Active
AGC-2-R	Eaton - Electronics Division	2	250	Fast Blow	100	0.250" x 1.250"	-55 ~ 125	0.063	17.52	Active
BK/AGC-2-R	Eaton - Electronics Division	2	250	Fast Blow	100	0.250" x 1.250"	-55 ~ 125	0.063	17.52	Active
0312002.HXP	Littelfuse Inc.	2	250	Fast Blow	100	0.250" x 1.250"	-55 ~ 125	0.0704	5.2	Active
0312002.MXP	Littelfuse Inc.	2	250	Fast Blow	100	0.250" x 1.250"	-55 ~ 125	0.0704	5.2	Active
0312002.VXP	Littelfuse	2	250	Fast Blow	100	0.250" x 1.250"	-55 ~ 125	0.0704	5.2	Active

Engineering Selection Recommendations

Eaton - Electronics Division Equivalents (AGC-2-R, BK/AGC-2-R): These parts are direct parametric equivalents manufactured by the same supplier as the BK/AGC-2RX. Both maintain identical electrical specifications, mechanical dimensions, and thermal operating range. Both parts carry CSA and UL approval certifications and comply with ROHS3 and REACH requirements. Selection from this group ensures consistency with original design specifications and supplier continuity.

Littelfuse Inc. Equivalents (0312002.HXP, 0312002.MXP, 0312002.VXP): These parts are parametric equivalents from Littelfuse Inc., maintaining all critical electrical and mechanical parameters. The Littelfuse 312 series fuses provide expanded approval agency coverage including CE, CSA, KC, PSE, and UL certifications. All three variants comply with ROHS3 and REACH requirements. Secondary characteristics including DC cold resistance (0.0704 Ohms) and melting I²t (5.2) differ from the Eaton part but do not affect substitution validity when primary parameters remain equivalent.

All identified substitutes are active products with confirmed inventory availability and maintain the required 3AB and 3AG holder compatibility.

Frequently Asked Questions (FAQ)

Q: Can AGC-2-R and BK/AGC-2-R be used interchangeably with BK/AGC-2RX?

A: Yes. Both parts are manufactured by Eaton - Electronics Division and maintain identical current rating (2 A), voltage rating (250 V AC), response time (fast blow), breaking capacity (100 A), physical dimensions (0.250" Dia x 1.250" L), and operating temperature range (-55°C ~ 125°C). All three parts require 3AB or 3AG fuse holders.

Q: What is the difference between Eaton and Littelfuse substitute options?

A: Both manufacturers provide parametric equivalents with identical electrical and mechanical specifications. Eaton parts (AGC-2-R, BK/AGC-2-R) carry CSA and UL certifications. Littelfuse parts (0312002.HXP, 0312002.MXP, 0312002.VXP) carry expanded certifications including CE, KC, and PSE in addition to CSA and UL. Secondary characteristics such as melting I²t and DC cold resistance vary between manufacturers but do not affect circuit protection performance when primary parameters remain equivalent.

Q: Are all substitute parts compatible with existing 3AB and 3AG fuse holders?

A: Yes. All identified substitute parts maintain the 3AB and 3AG package specification and physical dimensions of 0.250" Dia x 1.250" L (6.35mm x 31.75mm). Direct mechanical compatibility with existing fuse holders is confirmed.

Q: Do substitute parts meet the same approval standards as the BK/AGC-2RX?

A: The Eaton equivalents (AGC-2-R, BK/AGC-2-R) carry identical CSA and UL approvals. Littelfuse equivalents carry CSA and UL approvals plus additional certifications (CE, KC, PSE). All parts comply with ROHS3 and REACH requirements where applicable.

Q: What is the significance of different melting I²t values between manufacturers?

A: Melting I²t is a secondary characteristic that reflects thermal energy absorption during fuse operation. While Eaton parts specify 17.52 and Littelfuse parts specify 5.2, both maintain the same current rating (2 A), voltage rating (250 V), and fast-blow response time. Substitution validity is determined by primary electrical parameters, not secondary thermal characteristics.

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