AGC-1-1/2-R Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The AGC-1-1/2-R is a 1.5 A, 250 V AC/DC fast-blow glass cartridge fuse manufactured by Eaton - Electronics Division. This component is classified as Active product status and is designed for applications requiring overcurrent protection in circuits rated up to 250 V AC. The fuse operates within a temperature range of -55°C to 125°C and conforms to 3AB and 3AG package standards with dimensions of 0.250" diameter by 1.250" length (6.35 mm × 31.75 mm). Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for this widely used fuse cartridge.

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 (6.35 mm x 31.75 mm)
Mounting Type	Requires Holder
Approval Agencies	CSA, UL
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

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

Current Rating: All substitute parts must be rated at 1.5 A to ensure proper overcurrent protection function.

Voltage Rating (AC): All substitute parts must be rated at 250 V AC to maintain circuit protection integrity.

Fuse Type: All substitute parts must be glass cartridge fuses with fast-blow response characteristics.

Package / Case: All substitute parts must conform to 3AB and 3AG standards with physical dimensions of 0.250" diameter by 1.250" length to ensure mechanical compatibility with existing fuse holders.

Breaking Capacity: All substitute parts must maintain a breaking capacity of 100 A at rated voltage.

Operating Temperature Range: All substitute parts must operate within -55°C to 125°C.

Approval Agencies: Substitute parts must carry relevant safety certifications (CSA, UL, CE, PSE) to meet regulatory requirements.

The substitute parts identified below meet all these critical parameters and are therefore electrically and mechanically interchangeable with the AGC-1-1/2-R.

Parameter Comparison

Parameter	AGC-1-1/2-R (Eaton)	BK/AGC-1-1/2-R (Eaton)	031201.5HXP (Littelfuse)	031201.5MXP (Littelfuse)	031201.5VXP (Littelfuse)
Current Rating (Amps)	1.5 A	1.5 A	1.5 A	1.5 A	1.5 A
Voltage Rating - AC	250 V	250 V	250 V	250 V	250 V
Fuse Type	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass
Response Time	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"
Breaking Capacity @ Rated Voltage	100 A	100 A	100 A	100 A	100 A
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Size / Dimension	0.250" Dia x 1.250" L (6.35 mm x 31.75 mm)	0.250" Dia x 1.250" L (6.35 mm x 31.75 mm)	0.250" Dia x 1.250" L (6.35 mm x 31.75 mm)	0.250" Dia x 1.250" L (6.35 mm x 31.75 mm)	0.250" Dia x 1.250" L (6.35 mm x 31.75 mm)
Mounting Type	Requires Holder	Requires Holder	Requires Holder	Requires Holder	Requires Holder
Approval Agency	CSA, UL	CSA, UL	CE, CSA, PSE, UL	CE, CSA, PSE, UL	CE, CSA, PSE, UL
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All identified substitute parts—BK/AGC-1-1/2-R, 031201.5HXP, 031201.5MXP, and 031201.5VXP—are classified as Active products and carry full regulatory compliance certifications. The Eaton BK/AGC-1-1/2-R variant maintains identical electrical and mechanical specifications to the primary AGC-1-1/2-R part and represents a direct manufacturer equivalent.

The Littelfuse 312 series parts (031201.5HXP, 031201.5MXP, 031201.5VXP) are parametric equivalents that satisfy all critical electrical and mechanical requirements. These parts carry expanded approval agency certifications including CE and PSE in addition to CSA and UL, providing broader regulatory acceptance across international markets.

All substitute parts maintain the same current rating, voltage rating, response time, package standard, breaking capacity, operating temperature range, and physical dimensions as the AGC-1-1/2-R. Selection among these alternatives is based on availability, inventory levels, and specific regulatory requirements for the end application.

Frequently Asked Questions (FAQ)

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

A: Yes. The BK/AGC-1-1/2-R is a direct manufacturer equivalent produced by Eaton - Electronics Division. It maintains identical electrical specifications (1.5 A, 250 V AC), fuse type (fast-blow glass cartridge), package standard (3AB, 3AG), and physical dimensions (0.250" × 1.250"). Both parts are Active products with CSA and UL certifications.

Q: Are the Littelfuse 312 series parts (031201.5HXP, 031201.5MXP, 031201.5VXP) compatible with existing AGC fuse holders?

A: Yes. All Littelfuse 312 series parts conform to the 3AB and 3AG package standards with identical physical dimensions of 0.250" diameter by 1.250" length. They are mechanically compatible with any fuse holder designed for AGC cartridge fuses.

Q: What is the difference between the three Littelfuse 312 series variants?

A: The 031201.5HXP, 031201.5MXP, and 031201.5VXP parts are electrically and mechanically identical. All three are rated at 1.5 A, 250 V AC, fast-blow response, with 100 A breaking capacity and identical physical dimensions. Differences, if any, relate to packaging, distribution channels, or regional availability rather than electrical performance.

Q: Do all substitute parts carry the same safety certifications as the AGC-1-1/2-R?

A: The AGC-1-1/2-R carries CSA and UL certifications. The Littelfuse 312 series parts carry expanded certifications including CE, CSA, PSE, and UL. All parts meet or exceed the regulatory requirements of the original part.

Q: Can these fuses be used in circuits rated above 250 V AC?

A: No. All identified parts, including the AGC-1-1/2-R and its substitutes, are rated for 250 V AC maximum. Use in higher voltage circuits exceeds the rated voltage and violates the electrical specifications of the component.

Q: What is the operating temperature range for these fuses?

A: All parts operate within -55°C to 125°C. Applications outside this temperature range require alternative components rated for the specific operating conditions.

Q: Are these parts RoHS compliant?

A: Yes. The AGC-1-1/2-R is RoHS Compliant. The Littelfuse 312 series parts are ROHS3 Compliant. All parts meet RoHS environmental standards.

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