Equivalent & Substitute Parts for BK/PCI-5-R

Part Overview

The BK/PCI-5-R is a 5 A board mount fuse manufactured by Eaton - Electronics Division, rated for 125 V AC and 400 V DC operation. This through-hole radial fuse is designed for fast-blow response applications and is approved by CSA and UL standards. The product is currently active with 742 pieces in stock. Substitute parts are identified when equivalent electrical and mechanical parameters align with the main part specifications, enabling direct replacement in circuit designs where voltage and current ratings match application requirements.

Substiute Parts

BK/PCI-5-R

Eaton - Electronics DivisionIn Stock: 816BK/PCI-5-R Datasheet

Current PartRFQ

BK/PCD-5-R

Eaton - Electronics DivisionIn Stock: 12364BK/PCD-5-R Datasheet

Parametric EquivalentRFQ

80815000000

Littelfuse Inc.In Stock: 280880815000000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BK/PCI-5-R are identified based on strict alignment of the following critical parameters:

Parametric Equivalent Classification:

• Current Rating: 5 A (exact match required)
• Voltage Rating - AC: 125 V (exact match required)
• Voltage Rating - DC: 400 V (exact match required)
• Mounting Type: Through Hole (exact match required)
• Fuse Type: Board Mount (Cartridge Style Excluded) (exact match required)
• Response Time: Fast Blow (exact match required)
• Package / Case: Radial, Box (exact match required)

Similar Classification:

• Current Rating: 5 A (exact match)
• Mounting Type: Through Hole (exact match)
• Fuse Type: Board Mount (Cartridge Style Excluded) (exact match)
• Response Time: Fast Blow (exact match)
• Package / Case: Radial, Box (exact match)
• Voltage Rating - AC: 250 V (higher rating, different from main part)
• Voltage Rating - DC: 250 V (lower rating, different from main part)

The BK/PCD-5-R qualifies as a parametric equivalent with identical electrical and mechanical specifications. The Littelfuse 80815000000 is classified as a similar part due to differing voltage ratings, which restricts its use to applications with lower voltage requirements.

Parameter Comparison

Engineering Selection Recommendations

BK/PCD-5-R (Parametric Equivalent): The BK/PCD-5-R is a direct parametric equivalent to the BK/PCI-5-R. Both parts are manufactured by Eaton - Electronics Division and share identical electrical ratings (5 A, 125 V AC, 400 V DC), mechanical specifications, response characteristics, and regulatory approvals (CSA, UL). Physical dimensions are identical. This part qualifies for direct substitution in all applications where the BK/PCI-5-R is specified. Higher inventory availability (12292 pieces) may support supply chain continuity.

80815000000 (Similar Part): The Littelfuse 80815000000 shares the same current rating (5 A), mounting type (through-hole), fuse type (board mount), response time (fast-blow), and package style (radial, box). However, voltage ratings differ significantly: 250 V AC and 250 V DC compared to the main part's 125 V AC and 400 V DC. This part is suitable only for applications operating at or below 250 V AC and 250 V DC. The higher AC breaking capacity (100A AC versus 10kA AC) and different melting I²t value (1.1584 versus 5) indicate different thermal and electrical characteristics. Regulatory approval is cULus. Physical dimensions are marginally different. Selection of this part requires confirmation that application voltage requirements do not exceed 250 V AC / 250 V DC.

Frequently Asked Questions (FAQ)

Q: Can BK/PCD-5-R replace BK/PCI-5-R in all applications? A: Yes. The BK/PCD-5-R is a parametric equivalent with identical current rating (5 A), AC voltage rating (125 V), DC voltage rating (400 V), mounting type (through-hole), fuse type (board mount), response time (fast-blow), package style (radial, box), breaking capacity, and regulatory approvals (CSA, UL). Physical dimensions are identical. Direct substitution is valid.

Q: Under what conditions can 80815000000 be used as a substitute? A: The 80815000000 can be used only in applications where the circuit operates at or below 250 V AC and 250 V DC. The main part BK/PCI-5-R is rated for 400 V DC, which exceeds the 80815000000 rating. Using 80815000000 in a 400 V DC circuit would violate voltage specifications. Current rating (5 A), mounting type, fuse type, and response time are compatible.

Q: What are the key differences between BK/PCI-5-R and 80815000000? A: Voltage ratings differ: BK/PCI-5-R is 125 V AC / 400 V DC; 80815000000 is 250 V AC / 250 V DC. Breaking capacity differs: BK/PCI-5-R is 10kA AC / 4.2kA DC; 80815000000 is 100A AC / 10kA DC. Melting I²t differs: BK/PCI-5-R is 5; 80815000000 is 1.1584. Manufacturers differ: Eaton versus Littelfuse. Packaging differs: Bulk versus Cut Tape. Physical dimensions are similar but not identical. Both are ROHS3 compliant and hold regulatory approvals.

Q: Does packaging type affect substitution eligibility? A: Packaging type (Bulk versus Cut Tape) does not affect electrical or mechanical compatibility. It affects procurement, handling, and inventory management. BK/PCI-5-R and BK/PCD-5-R are both supplied in Bulk packaging. The 80815000000 is supplied in Cut Tape packaging. Selection should account for assembly process requirements and tape specifications if automated placement is used.

Q: Are all substitute parts ROHS3 compliant? A: Yes. BK/PCI-5-R, BK/PCD-5-R, and 80815000000 are all ROHS3 compliant. All parts are REACH unaffected and classified under ECCN EAR99 and HTSUS 8536.10.0040.

Q: What is the significance of melting I²t values? A: Melting I²t is a thermal characteristic that defines the energy required to melt the fuse element. BK/PCI-5-R and BK/PCD-5-R both have a melting I²t of 5. The 80815000000 has a melting I²t of 1.1584, indicating faster thermal response. This difference reflects different fuse element designs and affects trip time characteristics under overload conditions.