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

Part Overview

The BK/PCH-2-1/2 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 component is classified as obsolete, with 732 pieces currently in stock. The fuse features fast blow response characteristics and is designed for through-hole radial mounting in a box package configuration.

Identification of equivalent and substitute parts is necessary due to the obsolete product status of the BK/PCH-2-1/2. Active alternatives with identical electrical and mechanical specifications are available from both Eaton and third-party manufacturers, ensuring design continuity and supply chain reliability.

Substiute Parts

BK/PCH-2-1/2

Eaton - Electronics DivisionIn Stock: 767BK/PCH-2-1/2 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

80812500075

Littelfuse Inc.In Stock: 99880812500075 Datasheet

DirectRFQ

80812500440

Littelfuse Inc.In Stock: 75880812500440 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BK/PCH-2-1/2 are classified into two categories based on substitution criteria:

Direct Manufacturer Substitutes (Eaton - Electronics Division): These parts maintain identical electrical specifications (2.5 A, 250 V AC, 450 V DC, fast blow response) and mechanical compatibility (through-hole radial mounting, identical dimensions). All direct substitutes are active products with RoHS3 compliance, addressing the obsolete status of the original part. Direct substitutes include 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.

Cross-Manufacturer Parametric Equivalents (Littelfuse Inc.): Parts 80812500075 and 80812500440 from Littelfuse Inc. (TE5® 808 series) match all critical electrical parameters and mechanical form factors. These components provide functional equivalence with enhanced breaking capacity specifications (100A AC, 10kA DC versus 50A AC, 5.9kA DC) and extended operating temperature range (-40°C to 125°C). Both are active products with cULus certification and RoHS3 compliance.

Substitution Criteria:

• Current Rating: 2.5 A (exact match required)
• Voltage Ratings: 250 V AC and 450 V DC (exact match required)
• Response Time: Fast Blow (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package Configuration: Radial, Box (exact match required)
• Physical Dimensions: 0.350" L x 0.184" W x 0.345" H (tolerance within manufacturing specifications)

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Eaton PC-Tron® Series):

Select BK/PCB-2-1/2-R as the primary substitute. This part maintains complete electrical and mechanical equivalence to the BK/PCH-2-1/2 while offering active product status and RoHS3 compliance. With 10,134 pieces in inventory, BK/PCB-2-1/2-R provides superior supply chain availability. All Eaton alternatives (BK/PCH-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) are functionally interchangeable and carry identical electrical specifications and CSA/UL certifications.

For Enhanced Performance Applications:

Littelfuse TE5® 808 series components (80812500075 and 80812500440) are suitable when enhanced breaking capacity and extended operating temperature range are beneficial. These parts deliver 100A AC and 10kA DC breaking capacity compared to the 50A AC and 5.9kA DC of the original specification. Operating temperature range extends to -40°C to 125°C. Both Littelfuse parts carry cULus certification and RoHS3 compliance. Selection between 80812500075 and 80812500440 depends on specific packaging or procurement requirements, as electrical specifications are identical.

Compliance Considerations:

All substitute parts listed are RoHS3 compliant, addressing regulatory requirements that may not have applied to the original obsolete part. Eaton substitutes maintain CSA/UL certification; Littelfuse substitutes carry cULus certification. Both certification frameworks are equivalent for board mount fuse applications.

Frequently Asked Questions (FAQ)

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

A: Yes. BK/PCH-2-1/2-R is a direct substitute with identical electrical ratings (2.5 A, 250 V AC, 450 V DC), response time (fast blow), and mechanical configuration (through-hole radial mounting). The primary difference is product status (active versus obsolete) and RoHS3 compliance. Physical dimensions and breaking capacity are equivalent.

Q: What is the difference between the various Eaton part numbers (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)?

A: All six Eaton alternatives share identical electrical specifications, mechanical form factors, and performance characteristics. Differences exist only in part number designation and packaging configuration (all listed as bulk). Selection among these parts should be based on availability, internal part numbering systems, or procurement preferences. Electrical and mechanical interchangeability is complete.

Q: Are Littelfuse 80812500075 and 80812500440 compatible with the original BK/PCH-2-1/2?

A: Yes, with enhanced performance characteristics. Both Littelfuse parts match the critical electrical parameters (2.5 A, 250 V AC, 450 V DC, fast blow response) and mechanical mounting configuration (through-hole radial). Littelfuse components provide higher breaking capacity (100A AC, 10kA DC versus 50A AC, 5.9kA DC) and extended operating temperature range (-40°C to 125°C). Physical dimensions are within manufacturing tolerance of the original specification.

Q: What is the difference between Littelfuse 80812500075 and 80812500440?

A: Both parts are electrically and mechanically identical with matching current ratings, voltage ratings, response time, breaking capacity, and operating temperature range. Differences are limited to part number designation and packaging configuration. Selection should be based on procurement requirements or inventory availability.

Q: Does the higher breaking capacity of Littelfuse parts affect circuit compatibility?

A: No. Higher breaking capacity is a performance enhancement that does not compromise compatibility. Breaking capacity defines the maximum fault current the fuse can safely interrupt. A fuse with higher breaking capacity can safely handle the same normal operating currents and fault conditions as the original part while providing additional safety margin in high-fault-current environments.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed carry RoHS3 compliance status. The original BK/PCH-2-1/2 is RoHS non-compliant. This compliance upgrade is a benefit of transitioning to active substitute parts.

Q: Which substitute part should be selected for new designs?

A: For new designs, select BK/PCB-2-1/2-R (Eaton) or 80812500075 (Littelfuse). Both are active products with RoHS3 compliance and cULus/CSA-UL certification. BK/PCB-2-1/2-R maintains exact electrical and mechanical equivalence; 80812500075 provides enhanced breaking capacity and temperature range. Selection depends on design requirements and preferred supplier relationship.