BK1/TDC11-2-R Equivalent & Substitute Parts

Part Overview

The BK1/TDC11-2-R is a 2 A, 250 V AC/DC slow-blow glass cartridge fuse manufactured by Eaton - Electronics Division. This fuse is designed for use in 3AB and 3AG fuse holders with a 1/4" x 1-1/4" form factor. The part is currently active in production with 1179 pieces in stock. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, and functional characteristics to ensure direct interchangeability in applications requiring this fuse specification.

Substiute Parts

BK1/TDC11-2-R

Eaton - Electronics DivisionIn Stock: 1258BK1/TDC11-2-R Datasheet

Current PartRFQ

0001.2527

SCHURTER Inc.In Stock: 17050001.2527 Datasheet

Parametric EquivalentRFQ

3SB 2-R

Bel Fuse Inc.In Stock: 129953SB 2-R Datasheet

Parametric EquivalentRFQ

TSA-2A

OptiFuseIn Stock: 9861TSA-2A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BK1/TDC11-2-R are qualified based on the following criteria:

Primary Matching Parameters:

• Current Rating: 2 A
• Voltage Rating - AC: 250 V
• Fuse Type: Cartridge, Glass
• Response Time: Slow Blow
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4"
• Size / Dimension: 0.250" Dia x 1.252" L (6.35mm x 31.80mm)
• Mounting Type: Requires Holder

All substitute parts listed match these core electrical and mechanical parameters, ensuring functional equivalence and physical interchangeability within applications designed for the BK1/TDC11-2-R specification.

Parameter Comparison

Engineering Selection Recommendations

All four fuse options—BK1/TDC11-2-R, 0001.2527, 3SB 2-R, and TSA-2A—are active products with current manufacturing status and meet the core electrical and mechanical requirements for 2 A, 250 V AC slow-blow cartridge fuse applications.

Compliance and Certification Considerations:

The 3SB 2-R (Bel Fuse) carries the broadest approval agency certifications: CE, CSA, cULus, and PSE. This part is suitable for applications requiring multiple regional compliance standards.

The TSA-2A (OptiFuse) holds cULus and UL 248 certifications, appropriate for North American applications requiring UL compliance.

The 0001.2527 (SCHURTER) carries cURus certification and includes specified DC voltage rating of 63 V, making it suitable for dual AC/DC applications where DC performance is defined.

The BK1/TDC11-2-R (Eaton) is the reference part with RoHS compliance and is suitable for standard AC applications.

All parts are RoHS compliant or ROHS3 compliant and maintain the identical physical form factor and electrical ratings required for direct substitution.

Frequently Asked Questions (FAQ)

Q: Can the 0001.2527 be used in place of the BK1/TDC11-2-R?

A: Yes. Both parts share identical current rating (2 A), AC voltage rating (250 V), fuse type (cartridge glass), response time (slow blow), and physical dimensions (0.250" Dia x 1.252" L). The 0001.2527 includes an additional DC voltage rating of 63 V, which does not prevent AC-only application compatibility.

Q: What is the difference between the 3SB 2-R and TSA-2A?

A: Both parts meet the core electrical and mechanical specifications for the BK1/TDC11-2-R. The 3SB 2-R carries CE, CSA, cULus, and PSE certifications with an operating temperature range of -55°C to 125°C. The TSA-2A carries cULus and UL 248 certifications with the same operating temperature range. Selection depends on required regional compliance standards.

Q: Are all substitute parts physically interchangeable?

A: Yes. All substitute parts conform to the 3AB and 3AG holder standard with identical dimensions of 0.250" Dia x 1.252" L (6.35mm x 31.80mm). Physical installation in existing fuse holders is directly compatible.

Q: Does the DC voltage rating on the 0001.2527 affect AC-only applications?

A: No. The 0001.2527 is rated for both 250 V AC and 63 V DC. In AC-only applications, the DC rating does not impact performance. The part functions identically to the BK1/TDC11-2-R in 250 V AC circuits.

Q: Which substitute part has the highest inventory availability?

A: The 3SB 2-R (Bel Fuse) has 12,963 pieces in stock, followed by TSA-2A (OptiFuse) with 9,772 pieces, 0001.2527 (SCHURTER) with 1,691 pieces, and BK1/TDC11-2-R (Eaton) with 1,179 pieces.

Q: What certifications are required for my application?

A: Certification requirements depend on end-use application and regional standards. The 3SB 2-R supports CE, CSA, cULus, and PSE standards. The TSA-2A supports cULus and UL 248. The 0001.2527 supports cURus. Verify your application's specific certification requirements before final part selection.