Equivalent & Substitute Parts for BK/ABC-2-1/2-R

Part Overview

The BK/ABC-2-1/2-R is a 2.5 A ceramic cartridge fuse manufactured by Eaton - Electronics Division, rated for 250 V AC and 125 V DC operation. This fast-blow fuse is designed for applications requiring reliable overcurrent protection in industrial and commercial equipment. The part is currently active in production with 1012 units in stock. Substitute parts may be required due to supply chain constraints, design optimization, or application-specific performance requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

BK/ABC-2-1/2-R

Eaton - Electronics DivisionIn Stock: 1122BK/ABC-2-1/2-R Datasheet

Current PartRFQ

0001.1028

SCHURTER Inc.In Stock: 6500001.1028 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/ABC-2-1/2-R is determined by the following critical parameters:

Mandatory Matching Parameters:

• Current Rating: 2.5 A (exact match required)
• Voltage Rating - AC: 250 V (minimum requirement)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (physical compatibility)
• Response Time: Fast Blow (protection characteristic)
• Mounting Type: Requires Holder (installation compatibility)

Allowable Variations:

• Fuse material (ceramic to glass transition acceptable if all electrical parameters align)
• Manufacturer identity (different OEM acceptable)
• Melting I²t values within acceptable tolerance range
• Breaking capacity variations (substitute may have lower capacity if application permits)
• Product status (active or obsolete acceptable if in-stock inventory available)

The substitute part 0001.1028 from SCHURTER Inc. qualifies as an equivalent based on matching current rating, AC voltage rating, package dimensions, response time, and holder compatibility. Material composition differs (glass versus ceramic), but electrical performance parameters remain compatible for standard circuit protection applications.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection - BK/ABC-2-1/2-R (Eaton): Select this part for new equipment designs and applications requiring DC voltage protection. The active product status ensures long-term availability and supply chain stability. CSA and UL approvals provide regulatory compliance for North American markets. The 125 V DC rating and superior breaking capacity (10kA DC) make this the preferred choice for mixed AC/DC environments and high-fault-current applications.

Substitute Selection - 0001.1028 (SCHURTER): This part is acceptable as a substitute only for AC-only applications where DC voltage protection is not required. The glass cartridge construction and lower breaking capacity (1.5kA) limit its use to lower-fault-current circuits. Obsolete product status indicates limited future availability; use only when primary part is unavailable and application constraints permit reduced breaking capacity. ROHS3 compliance and REACH unaffected status maintain environmental regulatory alignment.

Selection Constraints:

• Do not substitute SCHURTER part in circuits requiring 125 V DC protection
• Do not substitute SCHURTER part in high-fault-current applications exceeding 1.5kA
• Verify holder compatibility before installation; both parts require 3AB or 3AG holders
• Confirm application voltage and fault current specifications before final selection

Frequently Asked Questions (FAQ)

Q: Can the SCHURTER 0001.1028 replace the Eaton BK/ABC-2-1/2-R in all applications?

A: No. The SCHURTER part lacks specified DC voltage rating and has significantly lower breaking capacity (1.5kA versus 10kA DC). Use SCHURTER only in AC-only circuits where fault current does not exceed 1.5kA.

Q: What is the physical difference between these two fuses?

A: Both fuses have identical 1/4" x 1-1/4" dimensions and fit the same 3AB/3AG holders. The primary difference is internal construction: Eaton uses ceramic material while SCHURTER uses glass. This material difference affects breaking capacity and DC performance.

Q: Are both fuses RoHS compliant?

A: Yes. Both BK/ABC-2-1/2-R and 0001.1028 are ROHS3 compliant and REACH unaffected, meeting current environmental regulations.

Q: Why does the Eaton part have higher breaking capacity?

A: Breaking capacity is determined by fuse material composition, internal construction, and design specifications. The ceramic construction of the Eaton part provides superior fault current handling compared to the glass construction of the SCHURTER part.

Q: Can I use the SCHURTER part in a 125 V DC circuit?

A: The SCHURTER part does not specify a DC voltage rating. For DC applications, use only the Eaton BK/ABC-2-1/2-R, which is rated for 125 V DC operation.

Q: What does "Fast Blow" mean for both fuses?

A: Fast Blow indicates rapid response to overcurrent conditions. Both fuses interrupt circuit current quickly when current exceeds 2.5 A, providing protection for sensitive equipment and circuits requiring immediate fault isolation.

Q: Is the SCHURTER part still available for purchase?

A: The SCHURTER 0001.1028 is listed as obsolete. While 619 units are currently in stock, future availability is not guaranteed. For new designs and long-term applications, specify the active Eaton BK/ABC-2-1/2-R.

Q: Do both fuses require the same holder?

A: Yes. Both fuses use 3AB or 3AG cartridge holders with 1/4" x 1-1/4" dimensions. Existing holders are compatible with either fuse without modification.