Equivalent & Substitute Parts for AGA-1/2 Glass Cartridge Fuse

Part Overview

The AGA-1/2 is a 500 mA, 250 V AC/DC fast-blow glass cartridge fuse manufactured by Eaton - Electronics Division. This component is designed for circuit protection in applications requiring fast response to overcurrent conditions. The fuse operates in the 1AG form factor (1/4" x 5/8") and requires a compatible holder for installation. The part maintains Active product status with 788 units currently in stock. Equivalent substitute parts are identified based on matching electrical ratings, mechanical dimensions, and functional characteristics to ensure direct interchangeability in existing circuit designs.

Substiute Parts

AGA-1/2

Eaton - Electronics DivisionIn Stock: 882AGA-1/2 Datasheet

Current PartRFQ

BK/AGA-1/2

Eaton - Electronics DivisionIn Stock: 1033BK/AGA-1/2 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

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

Electrical Equivalence Criteria:

• Current Rating: 500 mA (exact match required)
• Voltage Rating - AC: 250 V (exact match required)
• Response Time: Fast Blow (exact match required)
• DC Cold Resistance: 0.301 Ohms (exact match required)

Mechanical Equivalence Criteria:

• Package / Case: 1AG, 1/4" x 5/8" (exact match required)
• Size / Dimension: 0.250" Dia x 0.625" L / 6.35mm x 15.88mm (exact match required)

Functional Equivalence Criteria:

• Fuse Type: Cartridge, Glass (exact match required)
• Mounting Type: Requires Holder (exact match required)
• Approval Agency: UL (exact match required)

The substitute part BK/AGA-1/2 meets all electrical, mechanical, and functional equivalence criteria and is therefore a direct substitute for the AGA-1/2.

Parameter Comparison

Engineering Selection Recommendations

Both the AGA-1/2 and BK/AGA-1/2 are Active status products manufactured by Eaton - Electronics Division with UL approval. The parts are electrically and mechanically equivalent across all critical parameters: 500 mA current rating, 250 V AC voltage rating, fast-blow response time, 0.301 Ohms DC cold resistance, and 1AG form factor dimensions.

The BK/AGA-1/2 variant features a higher breaking capacity rating of 100A compared to the 35A rating of the AGA-1/2. This difference does not affect substitution eligibility for applications where the original AGA-1/2 was specified, as breaking capacity represents the maximum fault current the fuse can safely interrupt without rupturing the fuse body. Selection between these parts should be based on application-specific fault current requirements and circuit design parameters.

Both parts are RoHS non-compliant and carry MSL rating of 1 (Unlimited). Both are classified under ECCN EAR99 and HTSUS 8536.10.0020.

Frequently Asked Questions (FAQ)

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

A: Yes. The BK/AGA-1/2 meets all electrical and mechanical equivalence criteria for the AGA-1/2, including current rating (500 mA), voltage rating (250 V AC), response time (fast blow), package dimensions (1AG, 1/4" x 5/8"), and DC cold resistance (0.301 Ohms). Both parts are UL-approved and Active status products from Eaton - Electronics Division.

Q: What is the difference between the 35A and 100A breaking capacity ratings?

A: Breaking capacity specifies the maximum fault current the fuse can safely interrupt without rupturing. The AGA-1/2 has a 35A breaking capacity, while the BK/AGA-1/2 has a 100A breaking capacity. For applications where the original AGA-1/2 was specified, either part is suitable provided the circuit fault current does not exceed the fuse's breaking capacity rating.

Q: Are both parts compatible with the same holder?

A: Yes. Both the AGA-1/2 and BK/AGA-1/2 use the 1AG form factor (1/4" x 5/8") and require a compatible 1AG holder. The mechanical dimensions are identical: 0.250" diameter x 0.625" length (6.35mm x 15.88mm).

Q: What is the DC cold resistance specification used for?

A: DC cold resistance (0.301 Ohms for both parts) is the electrical resistance of the fuse element when no current is flowing. This parameter is used in circuit analysis to calculate voltage drop across the fuse under normal operating conditions and to verify circuit performance.

Q: Are there any compliance or certification differences between these parts?

A: Both parts carry identical certifications: UL approval and MSL rating of 1 (Unlimited). Both are classified as RoHS non-compliant. Both are assigned ECCN EAR99 and HTSUS 8536.10.0020 classifications.