Equivalent & Substitute Parts for AGC-1-1/4-R

Part Overview

The AGC-1-1/4-R is a 1.25 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 a 1/4" x 1-1/4" form factor. The part maintains Active product status with 975 units in current inventory. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity when the primary part number becomes unavailable or when alternative sourcing is required.

Substiute Parts

AGC-1-1/4-R

Eaton - Electronics DivisionIn Stock: 1044AGC-1-1/4-R Datasheet

Current PartRFQ

BK/AGC-1-1/4-R

Eaton - Electronics DivisionIn Stock: 1991BK/AGC-1-1/4-R Datasheet

DirectRFQ

0001.1025

SCHURTER Inc.In Stock: 12820001.1025 Datasheet

SimilarRFQ

03121.25MXP

Littelfuse Inc.In Stock: 139503121.25MXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AGC-1-1/4-R is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

• Current Rating: 1.25 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Fast Blow (exact match required)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (exact match required)
• Physical Dimensions: 0.250" Dia x 1.250" L (exact match required)

Secondary Compatibility Factors:

• Mounting Type: Requires Holder (all substitutes must use same holder type)
• Approval Agencies: CSA and/or UL certification required
• RoHS Compliance: ROHS3 or equivalent compliance status

Parts meeting all primary criteria are classified as direct equivalents. Parts meeting primary criteria but with variations in secondary factors (such as different approval agencies or RoHS revision levels) are classified as compatible substitutes with noted differences.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Preferred):

BK/AGC-1-1/4-R (Eaton - Electronics Division) is the direct equivalent to AGC-1-1/4-R. Both parts are manufactured by Eaton and share identical electrical and mechanical specifications. BK/AGC-1-1/4-R carries ROHS3 Compliant status compared to the base RoHS Compliant designation of AGC-1-1/4-R, representing an updated compliance revision. Both parts maintain Active product status with CSA and UL approvals. Inventory availability is higher for BK/AGC-1-1/4-R (1903 units) compared to AGC-1-1/4-R (975 units).

Compatible Substitutes:

03121.25MXP (Littelfuse Inc.) meets all primary substitution criteria with identical current rating, voltage rating, fuse type, response time, and physical dimensions. This part carries expanded approval agency certifications (CE, CSA, KC, PSE, UL) and maintains Active product status with ROHS3 compliance. Inventory availability is 1288 units. Selection of this substitute is supported by full electrical and mechanical compatibility.

0001.1025 (SCHURTER Inc.) meets primary substitution criteria for current rating, voltage rating, fuse type, response time, and package designation. Physical dimension tolerance shows a minor length variation (1.252" vs. 1.250"), which remains within typical mechanical tolerances for cartridge fuse holders. However, this part carries Obsolete product status and lacks specified approval agency certifications. The operating temperature range (-40°C ~ 85°C) is narrower than the primary part (-55°C ~ 125°C). Selection of this substitute is not recommended for new designs or applications requiring current certifications.

Selection Basis:

For applications requiring Active product status with current certifications, select either BK/AGC-1-1/4-R or 03121.25MXP. For applications with extended temperature requirements (-55°C operation), select BK/AGC-1-1/4-R or 03121.25MXP. For applications with specific approval agency requirements, 03121.25MXP provides the broadest certification coverage.

Frequently Asked Questions (FAQ)

Q: Can BK/AGC-1-1/4-R be used as a direct replacement for AGC-1-1/4-R?

A: Yes. BK/AGC-1-1/4-R is a direct equivalent manufactured by the same company (Eaton) with identical electrical ratings (1.25 A, 250 V AC), fuse type (cartridge, glass), response time (fast blow), and physical dimensions (0.250" Dia x 1.250" L). Both parts are approved by CSA and UL. The primary difference is the RoHS compliance revision level (ROHS3 vs. RoHS Compliant), which represents an updated compliance status.

Q: Is 03121.25MXP (Littelfuse) compatible with AGC-1-1/4-R?

A: Yes. 03121.25MXP meets all critical substitution parameters: 1.25 A current rating, 250 V AC voltage rating, cartridge glass fuse type, fast-blow response, and 0.250" Dia x 1.250" L physical dimensions. Both parts require 3AB/3AG fuse holders. The Littelfuse part carries additional approval certifications (CE, KC, PSE) beyond the CSA and UL certifications of the Eaton part. Both maintain Active product status and ROHS3 compliance.

Q: Why is 0001.1025 (SCHURTER) listed as a substitute if it is Obsolete?

A: 0001.1025 is included in the substitute list because it meets the primary electrical and mechanical substitution criteria (1.25 A, 250 V AC, cartridge glass, fast blow, 3AB/3AG package). However, Obsolete product status indicates this part is no longer in active production. Selection of this part is not recommended for new applications or when Active alternatives are available. Existing inventory may be available through secondary sources.

Q: What is the significance of the physical dimension tolerance in 0001.1025?

A: The 0001.1025 has a length specification of 1.252" compared to 1.250" for other parts. This 0.002" (0.05mm) difference falls within typical mechanical tolerances for cartridge fuse holders and does not prevent physical insertion into 3AB/3AG holders. However, combined with the Obsolete status and lack of current certifications, this part should not be selected for new designs.

Q: Are there temperature range differences between substitutes?

A: Yes. AGC-1-1/4-R, BK/AGC-1-1/4-R, and 03121.25MXP all operate across -55°C to 125°C. The 0001.1025 operates across -40°C to 85°C, a narrower range. For applications requiring operation below -40°C or above 85°C, select AGC-1-1/4-R, BK/AGC-1-1/4-R, or 03121.25MXP.

Q: Which substitute offers the broadest approval agency coverage?

A: 03121.25MXP (Littelfuse) carries certifications from CE, CSA, KC, PSE, and UL. This represents the broadest approval coverage among all listed parts. AGC-1-1/4-R and BK/AGC-1-1/4-R carry CSA and UL certifications. 0001.1025 carries no specified approval agencies.

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

A: All listed parts share identical electrical characteristics (1.25 A, 250 V AC, fast-blow response) and physical form factors (3AB/3AG, 0.250" Dia x 1.250" L). They are mechanically and electrically interchangeable within fuse holders designed for these specifications. Selection among them should be based on product status, certification requirements, temperature range requirements, and inventory availability.