BK/PCF-2-1/2-R Equivalent & Substitute Parts

Part Overview

The BK/PCF-2-1/2-R 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 designed for circuit protection in electronic applications. The part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain identical electrical and mechanical specifications for direct replacement in existing designs.

Substiute Parts

BK/PCF-2-1/2-R

Eaton - Electronics DivisionIn Stock: 924BK/PCF-2-1/2-R Datasheet

Current PartRFQ

BK/PCB-2-1/2-R

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

DirectRFQ

BK/PCC-2-1/2-R

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

Parametric EquivalentRFQ

BK/PCH-2-1/2-R

Eaton - Electronics DivisionIn Stock: 980BK/PCH-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

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

Electrical Parameters:

• 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)

Mechanical Parameters:

• Mounting Type: Through Hole (exact match required)
• Fuse Type: Board Mount (Cartridge Style Excluded) (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)

Compliance Parameters:

• Approval Agency: CSA, UL (minimum requirement)
• RoHS Status: ROHS3 Compliant (exact match required)

Substitute parts are grouped into two categories: Eaton PC-Tron® series equivalents (active status) and Littelfuse TE5® 808 series equivalents (active status with enhanced specifications).

Parameter Comparison

Engineering Selection Recommendations

Eaton PC-Tron® Series Substitutes (BK/PCB-2-1/2-R, BK/PCC-2-1/2-R, BK/PCH-2-1/2-R, PCB-2-1/2-R, PCC-2-1/2-R, PCH-2-1/2-R):

These parts provide direct parametric equivalence to the obsolete BK/PCF-2-1/2-R. All maintain identical electrical ratings (2.5 A, 250 V AC, 450 V DC), mechanical configuration (through-hole radial, box package), and physical dimensions. All variants carry CSA and UL approval certifications and are ROHS3 compliant. These parts are classified as active products with established supply availability. Selection among these variants is determined by packaging requirements (bulk) and internal design variations within the PC-Tron® series.

Littelfuse TE5® 808 Series Substitutes (80812500075, 80812500440):

These parts satisfy all critical electrical and mechanical substitution criteria with identical current rating, voltage ratings, response time, mounting type, and package configuration. Physical dimensions are nominally equivalent (8.90 x 4.65 x 8.90 mm versus 8.89 x 4.67 x 8.76 mm), representing standard manufacturing tolerance variations. The Littelfuse parts offer enhanced breaking capacity specifications (100A AC / 10kA DC versus 50A AC / 5.9kA DC) and extended operating temperature range (-40°C to 125°C). Approval certification is cULus (combined Canadian and US UL listing). These parts are active products suitable for direct replacement where enhanced performance margins are acceptable.

Frequently Asked Questions (FAQ)

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

A: Yes. BK/PCB-2-1/2-R is a direct substitute. Both parts share identical electrical specifications (2.5 A, 250 V AC, 450 V DC, fast-blow response), mechanical configuration (through-hole radial board mount), physical dimensions (8.89 x 4.67 x 8.76 mm), and approval certifications (CSA, UL). BK/PCB-2-1/2-R is an active product, whereas BK/PCF-2-1/2-R is obsolete.

Q: What is the difference between the Eaton PC-Tron® variants (BK/PCB-2-1/2-R, BK/PCC-2-1/2-R, BK/PCH-2-1/2-R, PCB-2-1/2-R, PCC-2-1/2-R, PCH-2-1/2-R)?

A: All six Eaton variants are parametrically equivalent with identical electrical and mechanical specifications. Differences exist in internal design architecture and packaging designation within the PC-Tron® series. Selection is based on availability and packaging requirements (all are supplied in bulk packaging). Electrical performance and physical form factor are identical across all variants.

Q: Can Littelfuse 80812500075 or 80812500440 replace BK/PCF-2-1/2-R?

A: Yes. Both Littelfuse parts satisfy all critical substitution parameters: 2.5 A current rating, 250 V AC / 450 V DC voltage ratings, fast-blow response, through-hole radial board mount configuration, and equivalent physical dimensions within manufacturing tolerance. Physical dimensions are 8.90 x 4.65 x 8.90 mm (versus 8.89 x 4.67 x 8.76 mm for the original). Littelfuse parts offer enhanced breaking capacity (100A AC / 10kA DC) and extended operating temperature range (-40°C to 125°C).

Q: Are there approval certification differences between Eaton and Littelfuse substitutes?

A: Yes. Eaton PC-Tron® variants carry CSA and UL approvals. Littelfuse TE5® 808 variants carry cULus approval (combined Canadian and US UL listing). Both certification schemes are recognized for board-mount fuse applications. Selection based on certification requirements depends on end-application regulatory jurisdiction.

Q: What is the significance of the physical dimension differences between Eaton (8.89 x 4.67 x 8.76 mm) and Littelfuse (8.90 x 4.65 x 8.90 mm) parts?

A: The dimensional variations fall within standard manufacturing tolerances for radial board-mount fuses. Both parts are designed for identical through-hole footprints and will function in PCB layouts designed for the original BK/PCF-2-1/2-R. Verification of PCB clearance is recommended for applications with tight spatial constraints.

Q: What does "fast-blow" response time mean for these fuses?

A: Fast-blow response indicates the fuse will open rapidly when current exceeds the rated 2.5 A threshold. This characteristic is consistent across all substitute parts and matches the original BK/PCF-2-1/2-R specification.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All Eaton PC-Tron® variants and Littelfuse TE5® 808 variants are ROHS3 compliant, matching the original BK/PCF-2-1/2-R specification.

Q: What is the melting I²t specification and how does it affect substitution?

A: Melting I²t represents the thermal energy required to melt the fuse element. Eaton parts specify 0.3 I²t, while Littelfuse parts specify 0.0898 I²t. The Littelfuse specification indicates faster thermal response. Both values are within acceptable ranges for 2.5 A fast-blow fuses and do not preclude substitution. Application-specific thermal requirements should be evaluated if precise I²t matching is critical.