Equivalent & Substitute Parts for BK/PCH-2-1/2-SD

Part Overview

The BK/PCH-2-1/2-SD is a 2.5 A, 250 V AC / 450 V DC board mount fuse manufactured by Eaton - Electronics Division as part of the PC-Tron® series. This through-hole radial fuse features fast-blow response characteristics and is rated for 10 kA AC and 1 kA DC breaking capacity. The part is classified as obsolete, necessitating identification of active equivalent and substitute components to maintain design continuity and ensure procurement availability for new production and field replacements.

Substiute Parts

BK/PCH-2-1/2-SD

Eaton - Electronics DivisionIn Stock: 881BK/PCH-2-1/2-SD Datasheet

Current PartRFQ

BK/PCH-2-1/2-R

Eaton - Electronics DivisionIn Stock: 980BK/PCH-2-1/2-R Datasheet

DirectRFQ

BK/PCB-2-1/2-R

Eaton - Electronics DivisionIn Stock: 10217BK/PCB-2-1/2-R Datasheet

Parametric EquivalentRFQ

BK/PCC-2-1/2-R

Eaton - Electronics DivisionIn Stock: 4467BK/PCC-2-1/2-R Datasheet

Parametric EquivalentRFQ

PCB-2-1/2-R

Eaton - Electronics DivisionIn Stock: 1180PCB-2-1/2-R Datasheet

Parametric EquivalentRFQ

PCC-2-1/2-R

Eaton - Electronics DivisionIn Stock: 931PCC-2-1/2-R Datasheet

Parametric EquivalentRFQ

PCH-2-1/2-R

Eaton - Electronics DivisionIn Stock: 1217PCH-2-1/2-R Datasheet

Parametric EquivalentRFQ

7100.1169.13

SCHURTER Inc.In Stock: 9167100.1169.13 Datasheet

SimilarRFQ

80812500000

Littelfuse Inc.In Stock: 276780812500000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete BK/PCH-2-1/2-SD is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

• Current Rating: 2.5 A (exact match required)
• Voltage Rating - AC: 250 V (exact match required)
• Voltage Rating - DC: 450 V (exact match required)
• Response Time: Fast Blow (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Radial, Box (exact match required)
• Physical Dimensions: 0.350" L x 0.184" W x 0.345" H (exact match required)

Direct Manufacturer Equivalents (Eaton - Electronics Division, PC-Tron® series, active status):

• BK/PCH-2-1/2-R
• BK/PCB-2-1/2-R
• BK/PCC-2-1/2-R
• PCH-2-1/2-R
• PCB-2-1/2-R
• PCC-2-1/2-R

These parts maintain identical electrical specifications and physical form factors. All are active products with RoHS3 compliance, providing superior availability compared to the obsolete main part.

Similar Manufacturer Equivalents (alternative manufacturers, matching core electrical parameters):

• 80812500000 (Littelfuse Inc., TE5® 808 series)
• 7100.1169.13 (SCHURTER Inc., FRT 250F series)

These parts meet the primary electrical and mechanical criteria with minor variations in breaking capacity and thermal characteristics.

Parameter Comparison

Engineering Selection Recommendations

Tier 1 - Direct Eaton PC-Tron® Equivalents (Recommended Primary Selection):

The parts BK/PCH-2-1/2-R, BK/PCB-2-1/2-R, BK/PCC-2-1/2-R, PCH-2-1/2-R, PCB-2-1/2-R, and PCC-2-1/2-R are active Eaton products with identical electrical and mechanical specifications to the obsolete BK/PCH-2-1/2-SD. All six parts are RoHS3 compliant and carry CSA and UL approvals. These components provide direct form-fit-function replacement with superior inventory availability. Selection among these six variants should be based on packaging preference (Bulk) and current stock levels.

Tier 2 - Alternative Manufacturer Equivalents:

The Littelfuse 80812500000 (TE5® 808 series) matches all primary electrical parameters and physical dimensions with enhanced breaking capacity specifications (100 A AC, 10 kA DC). This part carries cULus approval and operates across an extended temperature range (-40°C to 125°C). The part is supplied in Cut Tape packaging and is RoHS3 compliant.

The SCHURTER 7100.1169.13 (FRT 250F series) meets the core electrical and mechanical criteria with the exception of DC voltage rating (250 V DC versus 450 V DC). This part is suitable only for applications where the 450 V DC rating is not required. Physical dimensions differ slightly (0.453" L x 0.197" W x 0.315" H). The part carries cURus approval and operates across -40°C to 85°C.

Compliance Considerations:

All recommended Tier 1 and Tier 2 substitutes are RoHS3 compliant, addressing environmental regulatory requirements superior to the non-compliant main part. All parts carry recognized safety certifications (CSA, UL, or cULus/cURus equivalents).

Frequently Asked Questions (FAQ)

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

A: Yes. BK/PCH-2-1/2-R is a direct equivalent with identical current rating (2.5 A), voltage ratings (250 V AC / 450 V DC), response time (Fast Blow), mounting type (Through Hole), and physical dimensions (0.350" L x 0.184" W x 0.345" H). The primary difference is product status: BK/PCH-2-1/2-R is active with RoHS3 compliance, whereas BK/PCH-2-1/2-SD is obsolete and non-compliant.

Q: What is the difference between BK/PCH-2-1/2-R, BK/PCB-2-1/2-R, BK/PCC-2-1/2-R, PCH-2-1/2-R, PCB-2-1/2-R, and PCC-2-1/2-R?

A: All six parts are Eaton PC-Tron® series fuses with identical electrical specifications and physical form factors. The differences are in part number nomenclature and packaging format (all supplied in Bulk). From an engineering perspective, these parts are functionally equivalent and interchangeable. Selection should be based on packaging preference and inventory availability.

Q: Can the Littelfuse 80812500000 be substituted for BK/PCH-2-1/2-SD?

A: Yes, with the following considerations. The Littelfuse part matches all primary electrical parameters (2.5 A, 250 V AC, 450 V DC, Fast Blow) and physical dimensions (0.350" L x 0.183" W x 0.350" H). The breaking capacity is enhanced (100 A AC, 10 kA DC). The part is supplied in Cut Tape packaging rather than Bulk. Approval agency is cULus rather than CSA/UL. Operating temperature range is extended (-40°C to 125°C). All specifications are compatible with the original design requirements.

Q: Can the SCHURTER 7100.1169.13 be substituted for BK/PCH-2-1/2-SD?

A: Substitution is conditional. The SCHURTER part matches current rating (2.5 A), AC voltage (250 V), response time (Fast Blow), mounting type (Through Hole), and package type (Radial, Box). However, the DC voltage rating is 250 V, not 450 V. This part is suitable only for applications where the 450 V DC rating is not required. Physical dimensions differ slightly (0.453" L x 0.197" W x 0.315" H). Approval agency is cURus rather than CSA/UL.

Q: What does "Fast Blow" response time mean?

A: Fast Blow indicates the fuse will open quickly when current exceeds the rated value. This characteristic is consistent across all substitute parts listed and is a critical parameter for circuit protection in the specified application.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All recommended Tier 1 (Eaton) and Tier 2 (Littelfuse and SCHURTER) substitute parts are RoHS3 compliant. The original BK/PCH-2-1/2-SD is RoHS non-compliant, making substitution necessary for new designs subject to environmental regulations.

Q: What is the significance of the different part number prefixes (BK/, PC-)?

A: The prefixes indicate internal Eaton nomenclature variants within the PC-Tron® series. From an engineering standpoint, parts with different prefixes but identical electrical and mechanical specifications are functionally equivalent and interchangeable.

Q: Which substitute part should I select for new production?

A: For new production, select from Tier 1 equivalents (BK/PCH-2-1/2-R, BK/PCB-2-1/2-R, BK/PCC-2-1/2-R, PCH-2-1/2-R, PCB-2-1/2-R, or PCC-2-1/2-R) based on current inventory availability and packaging preference. All six parts are active Eaton products with identical specifications and superior availability compared to the obsolete main part.