BK/AGC-1-1/2 Equivalent & Substitute Parts

Part Overview

The BK/AGC-1-1/2 is a 1.5 A 250 V AC DC fast-blow glass cartridge fuse in the 3AB/3AG form factor (0.250" Dia x 1.250" L). This component requires a compatible fuse holder for installation and is classified as obsolete by the manufacturer. Due to its obsolete status, equivalent and substitute parts from active product lines are necessary to maintain circuit protection functionality in applications requiring this electrical specification.

Key Parameters

Parameter	Value
Current Rating	1.5 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)
Approval Agencies	CSA, UL
Mounting Type	Requires Holder

Substitute Part Grouping Explanation

Substitution of the BK/AGC-1-1/2 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Current Rating: 1.5 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

All substitute parts listed maintain these electrical and mechanical specifications. Substitute parts are grouped into three categories:

Direct Manufacturer Equivalents (Eaton - Electronics Division): AGC-1-1/2-R, BK/AGC-1-1/2-R, BK/AGC-1-1/2AA-R, BK/AGC-1-1/2LX, BK/AGC-1-1/2RX, and BP-AGC-1-1-2-RP. These parts share identical electrical performance and physical dimensions with the main part.

Similar Manufacturer Equivalents (Littelfuse Inc.): 031201.5HXP, 031201.5MXP, and 031201.5VXP. These parts meet all mandatory electrical and mechanical parameters and are from an alternative manufacturer.

Parameter Comparison

Part Number	Manufacturer	Current Rating (A)	Voltage Rating (V AC)	Response Time	Breaking Capacity (A)	Size (Dia x L)	Product Status	RoHS Status
BK/AGC-1-1/2	Eaton - Electronics Division	1.5	250	Fast Blow	100	0.250" x 1.250"	Obsolete	RoHS non-compliant
AGC-1-1/2-R	Eaton - Electronics Division	1.5	250	Fast Blow	100	0.250" x 1.250"	Active	RoHS Compliant
BK/AGC-1-1/2-R	Eaton - Electronics Division	1.5	250	Fast Blow	100	0.250" x 1.250"	Active	ROHS3 Compliant
BK/AGC-1-1/2AA-R	Eaton - Electronics Division	1.5	250	Fast Blow	100	0.250" x 1.250"	Active	Not specified
BK/AGC-1-1/2LX	Eaton - Electronics Division	1.5	250	Fast Blow	100	0.250" x 1.250"	Active	RoHS non-compliant
BK/AGC-1-1/2RX	Eaton - Electronics Division	1.5	250	Fast Blow	100	0.250" x 1.250"	Active	Not specified
BP-AGC-1-1-2-RP	Eaton - Bussmann Electrical Division	1.5	250	Fast Blow	100	0.250" x 1.250"	Active	Not specified
031201.5HXP	Littelfuse Inc.	1.5	250	Fast Blow	100	0.250" x 1.250"	Active	ROHS3 Compliant
031201.5MXP	Littelfuse Inc.	1.5	250	Fast Blow	100	0.250" x 1.250"	Active	ROHS3 Compliant
031201.5VXP	Littelfuse Inc.	1.5	250	Fast Blow	100	0.250" x 1.250"	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: BK/AGC-1-1/2-R (Eaton - Electronics Division)

This part is the direct equivalent of the obsolete BK/AGC-1-1/2. It maintains identical electrical specifications and physical dimensions while offering active product status and ROHS3 compliance. It carries CSA and UL approvals consistent with the original part.

Secondary Recommendations: AGC-1-1/2-R (Eaton - Electronics Division)

This part provides equivalent electrical and mechanical performance with active product status and RoHS compliance. It is suitable for applications where the specific packaging designation is not critical.

Alternative Manufacturer Options: 031201.5HXP, 031201.5MXP, 031201.5VXP (Littelfuse Inc.)

These parts meet all mandatory electrical and mechanical parameters and are from an established alternative manufacturer. All three variants carry ROHS3 compliance and are approved by CE, CSA, PSE, and UL. These options are appropriate when supply chain diversification or alternative sourcing is required.

Eaton - Bussmann Electrical Division Option: BP-AGC-1-1-2-RP

This part maintains full electrical and mechanical equivalence and is available from the Bussmann division of Eaton. It is suitable for applications where Bussmann-branded components are specified.

All recommended substitutes are compatible with existing 3AB/3AG fuse holders and maintain the same operating temperature range of -55°C to 125°C.

Frequently Asked Questions (FAQ)

Q: Can BK/AGC-1-1/2-R be used as a direct replacement for the obsolete BK/AGC-1-1/2?

A: Yes. BK/AGC-1-1/2-R is the direct equivalent. It maintains identical current rating (1.5 A), voltage rating (250 V AC), response time (fast blow), breaking capacity (100 A), and physical dimensions (0.250" Dia x 1.250" L). Both require the same 3AB/3AG fuse holder.

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

A: All substitute parts meet the same electrical specifications (1.5 A, 250 V AC, fast blow, 100 A breaking capacity) and physical dimensions. The primary differences are manufacturer and internal design characteristics such as melting I²t values (Eaton parts: 9.023; Littelfuse parts: 2.35). Both manufacturers' parts carry equivalent approvals (CSA, UL). Selection between manufacturers is based on supply availability, procurement preference, or system design requirements.

Q: Are the Littelfuse 031201.5HXP, 031201.5MXP, and 031201.5VXP parts interchangeable with each other?

A: Yes. All three Littelfuse parts are parametric equivalents with identical electrical ratings, voltage specifications, response time, breaking capacity, and physical dimensions. They are interchangeable from an electrical and mechanical standpoint.

Q: Do all substitute parts require the same fuse holder as the original BK/AGC-1-1/2?

A: Yes. All substitute parts are designed for 3AB/3AG fuse holders and share the same physical dimensions (0.250" Dia x 1.250" L). No holder modification or replacement is required.

Q: What is the significance of RoHS compliance status in selecting a substitute?

A: RoHS compliance indicates conformance to restrictions on hazardous substances. The original BK/AGC-1-1/2 is RoHS non-compliant. Active substitutes such as BK/AGC-1-1/2-R (ROHS3 Compliant) and Littelfuse options (ROHS3 Compliant) meet current environmental standards. Selection should align with system-level RoHS requirements.

Q: Can I use BP-AGC-1-1-2-RP from the Bussmann division as a substitute?

A: Yes. BP-AGC-1-1-2-RP is a parametric equivalent with identical electrical and mechanical specifications. It is suitable for applications where Bussmann-branded components are preferred or specified.

Q: What approval agencies certify these substitute parts?

A: Eaton parts (BK/AGC-1-1/2-R, AGC-1-1/2-R, and others) carry CSA and UL approvals. Littelfuse parts (031201.5HXP, 031201.5MXP, 031201.5VXP) carry CE, CSA, PSE, and UL approvals. All approvals are consistent with the original BK/AGC-1-1/2 specification.

Q: Is there a difference in operating temperature range between the original and substitute parts?

A: No. All substitute parts maintain the same operating temperature range of -55°C to 125°C as the original BK/AGC-1-1/2.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message